[v1] ACPI: Switch to use generic UUID API

Commit Message

Andy Shevchenko May 4, 2017, 9:21 a.m. UTC

acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
bytes. Instead we convert them to use uuid_le type. At the same time we
convert current users.

acpi_str_to_uuid() becomes useless after the conversion and it's safe to
get rid of it.

The conversion fixes a potential bug in int340x_thermal as well since
we have to use memcmp() on binary data.

Cc: Rafael J. Wysocki <[e-mail]>
Cc: Mika Westerberg <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: Dan Williams <[e-mail]>
Cc: Amir Goldstein <[e-mail]>
Cc: Jarkko Sakkinen <[e-mail]>
Cc: Jani Nikula <[e-mail]>
Cc: Ben Skeggs <[e-mail]>
Cc: Benjamin Tissoires <[e-mail]>
Cc: Joerg Roedel <[e-mail]>
Cc: Adrian Hunter <[e-mail]>
Cc: Yisen Zhuang <[e-mail]>
Cc: Bjorn Helgaas <[e-mail]>
Cc: Zhang Rui <[e-mail]>
Cc: Felipe Balbi <[e-mail]>
Cc: Mathias Nyman <[e-mail]>
Cc: Heikki Krogerus <[e-mail]>
Cc: Liam Girdwood <[e-mail]>
Cc: Mark Brown <[e-mail]>
Signed-off-by: Andy Shevchenko <[e-mail]>
---
 drivers/acpi/acpi_extlog.c                         | 10 +++---
 drivers/acpi/bus.c                                 | 29 ++--------------
 drivers/acpi/nfit/core.c                           | 40 +++++++++++-----------
 drivers/acpi/nfit/nfit.h                           |  3 +-
 drivers/acpi/utils.c                               |  4 +--
 drivers/char/tpm/tpm_crb.c                         |  9 +++--
 drivers/char/tpm/tpm_ppi.c                         | 20 +++++------
 drivers/gpu/drm/i915/intel_acpi.c                  | 14 +++-----
 drivers/gpu/drm/nouveau/nouveau_acpi.c             | 20 +++++------
 drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c     |  9 +++--
 drivers/hid/i2c-hid/i2c-hid.c                      |  9 +++--
 drivers/iommu/dmar.c                               | 11 +++---
 drivers/mmc/host/sdhci-pci-core.c                  |  9 +++--
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c | 15 ++++----
 drivers/pci/pci-acpi.c                             | 11 +++---
 drivers/pci/pci-label.c                            |  4 +--
 drivers/thermal/int340x_thermal/int3400_thermal.c  |  8 ++---
 drivers/usb/dwc3/dwc3-pci.c                        |  6 ++--
 drivers/usb/host/xhci-pci.c                        |  9 +++--
 drivers/usb/misc/ucsi.c                            |  2 +-
 drivers/usb/typec/typec_wcove.c                    |  4 +--
 include/acpi/acpi_bus.h                            |  9 ++---
 include/linux/acpi.h                               |  4 +--
 include/linux/pci-acpi.h                           |  2 +-
 sound/soc/intel/skylake/skl-nhlt.c                 |  7 ++--
 tools/testing/nvdimm/test/iomap.c                  |  2 +-
 tools/testing/nvdimm/test/nfit.c                   |  2 +-
 27 files changed, 116 insertions(+), 156 deletions(-)

Comments

Jani Nikula May 4, 2017, 9:37 a.m. UTC | #1

On Thu, 04 May 2017, Andy Shevchenko <[e-mail]> wrote:
> diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
> index eb638a1e69d2..72bfe6ceadf8 100644
> --- a/drivers/gpu/drm/i915/intel_acpi.c
> +++ b/drivers/gpu/drm/i915/intel_acpi.c
> @@ -15,13 +15,9 @@ static struct intel_dsm_priv {
>  	acpi_handle dhandle;
>  } intel_dsm_priv;
>  
> -static const u8 intel_dsm_guid[] = {
> -	0xd3, 0x73, 0xd8, 0x7e,
> -	0xd0, 0xc2,
> -	0x4f, 0x4e,
> -	0xa8, 0x54,
> -	0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c
> -};
> +static const uuid_le intel_dsm_guid =
> +	UUID_LE(0x7ed873d3, 0xc2d0, 0x4e4f,
> +		0xa8, 0x54, 0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c);
>  
>  static char *intel_dsm_port_name(u8 id)
>  {
> @@ -80,7 +76,7 @@ static void intel_dsm_platform_mux_info(void)
>  	int i;
>  	union acpi_object *pkg, *connector_count;
>  
> -	pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, intel_dsm_guid,
> +	pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, &intel_dsm_guid,
>  			INTEL_DSM_REVISION_ID, INTEL_DSM_FN_PLATFORM_MUX_INFO,
>  			NULL, ACPI_TYPE_PACKAGE);
>  	if (!pkg) {
> @@ -118,7 +114,7 @@ static bool intel_dsm_pci_probe(struct pci_dev *pdev)
>  	if (!dhandle)
>  		return false;
>  
> -	if (!acpi_check_dsm(dhandle, intel_dsm_guid, INTEL_DSM_REVISION_ID,
> +	if (!acpi_check_dsm(dhandle, &intel_dsm_guid, INTEL_DSM_REVISION_ID,
>  			    1 << INTEL_DSM_FN_PLATFORM_MUX_INFO)) {
>  		DRM_DEBUG_KMS("no _DSM method for intel device\n");
>  		return false;

The drm/i915 hunk above is

Reviewed-by: Jani Nikula <[e-mail]>

and acked for merging via whichever tree is suitable.


BR,
Jani.

Heikki Krogerus May 4, 2017, 12:14 p.m. UTC | #2

On Thu, May 04, 2017 at 12:21:51PM +0300, Andy Shevchenko wrote:
> acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
> bytes. Instead we convert them to use uuid_le type. At the same time we
> convert current users.
> 
> acpi_str_to_uuid() becomes useless after the conversion and it's safe to
> get rid of it.
> 
> The conversion fixes a potential bug in int340x_thermal as well since
> we have to use memcmp() on binary data.
> 
> Cc: Rafael J. Wysocki <[e-mail]>
> Cc: Mika Westerberg <[e-mail]>
> Cc: Borislav Petkov <[e-mail]>
> Cc: Dan Williams <[e-mail]>
> Cc: Amir Goldstein <[e-mail]>
> Cc: Jarkko Sakkinen <[e-mail]>
> Cc: Jani Nikula <[e-mail]>
> Cc: Ben Skeggs <[e-mail]>
> Cc: Benjamin Tissoires <[e-mail]>
> Cc: Joerg Roedel <[e-mail]>
> Cc: Adrian Hunter <[e-mail]>
> Cc: Yisen Zhuang <[e-mail]>
> Cc: Bjorn Helgaas <[e-mail]>
> Cc: Zhang Rui <[e-mail]>
> Cc: Felipe Balbi <[e-mail]>
> Cc: Mathias Nyman <[e-mail]>
> Cc: Heikki Krogerus <[e-mail]>
> Cc: Liam Girdwood <[e-mail]>
> Cc: Mark Brown <[e-mail]>
> Signed-off-by: Andy Shevchenko <[e-mail]>

OK by me, FWIW:

Reviewed-by: Heikki Krogerus <[e-mail]>


Thanks,

Joerg Roedel May 4, 2017, 12:46 p.m. UTC | #3

On Thu, May 04, 2017 at 12:21:51PM +0300, Andy Shevchenko wrote:
> diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
> index cbf7763d8091..420d51b286ad 100644
> --- a/drivers/iommu/dmar.c
> +++ b/drivers/iommu/dmar.c
> @@ -1808,10 +1808,9 @@ IOMMU_INIT_POST(detect_intel_iommu);
>   * for Directed-IO Architecture Specifiction, Rev 2.2, Section 8.8
>   * "Remapping Hardware Unit Hot Plug".
>   */
> -static u8 dmar_hp_uuid[] = {
> -	/* 0000 */    0xA6, 0xA3, 0xC1, 0xD8, 0x9B, 0xBE, 0x9B, 0x4C,
> -	/* 0008 */    0x91, 0xBF, 0xC3, 0xCB, 0x81, 0xFC, 0x5D, 0xAF
> -};
> +static uuid_le dmar_hp_uuid =
> +	UUID_LE(0xD8C1A3A6, 0xBE9B, 0x4C9B,
> +		0x91, 0xBF, 0xC3, 0xCB, 0x81, 0xFC, 0x5D, 0xAF);
>  
>  /*
>   * Currently there's only one revision and BIOS will not check the revision id,
> @@ -1824,7 +1823,7 @@ static u8 dmar_hp_uuid[] = {
>  
>  static inline bool dmar_detect_dsm(acpi_handle handle, int func)
>  {
> -	return acpi_check_dsm(handle, dmar_hp_uuid, DMAR_DSM_REV_ID, 1 << func);
> +	return acpi_check_dsm(handle, &dmar_hp_uuid, DMAR_DSM_REV_ID, 1 << func);
>  }
>  
>  static int dmar_walk_dsm_resource(acpi_handle handle, int func,
> @@ -1843,7 +1842,7 @@ static int dmar_walk_dsm_resource(acpi_handle handle, int func,
>  	if (!dmar_detect_dsm(handle, func))
>  		return 0;
>  
> -	obj = acpi_evaluate_dsm_typed(handle, dmar_hp_uuid, DMAR_DSM_REV_ID,
> +	obj = acpi_evaluate_dsm_typed(handle, &dmar_hp_uuid, DMAR_DSM_REV_ID,
>  				      func, NULL, ACPI_TYPE_BUFFER);
>  	if (!obj)
>  		return -ENODEV;

DMAR part is

	Acked-by: Joerg Roedel <[e-mail]>

Bjorn Helgaas May 4, 2017, 1:51 p.m. UTC | #4

On Thu, May 4, 2017 at 4:21 AM, Andy Shevchenko
<[e-mail]> wrote:
> acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
> bytes. Instead we convert them to use uuid_le type. At the same time we
> convert current users.
>
> acpi_str_to_uuid() becomes useless after the conversion and it's safe to
> get rid of it.
>
> The conversion fixes a potential bug in int340x_thermal as well since
> we have to use memcmp() on binary data.
>
> Cc: Rafael J. Wysocki <[e-mail]>
> Cc: Mika Westerberg <[e-mail]>
> Cc: Borislav Petkov <[e-mail]>
> Cc: Dan Williams <[e-mail]>
> Cc: Amir Goldstein <[e-mail]>
> Cc: Jarkko Sakkinen <[e-mail]>
> Cc: Jani Nikula <[e-mail]>
> Cc: Ben Skeggs <[e-mail]>
> Cc: Benjamin Tissoires <[e-mail]>
> Cc: Joerg Roedel <[e-mail]>
> Cc: Adrian Hunter <[e-mail]>
> Cc: Yisen Zhuang <[e-mail]>
> Cc: Bjorn Helgaas <[e-mail]>
> Cc: Zhang Rui <[e-mail]>
> Cc: Felipe Balbi <[e-mail]>
> Cc: Mathias Nyman <[e-mail]>
> Cc: Heikki Krogerus <[e-mail]>
> Cc: Liam Girdwood <[e-mail]>
> Cc: Mark Brown <[e-mail]>
> Signed-off-by: Andy Shevchenko <[e-mail]>

For the drivers/pci parts:

Acked-by: Bjorn Helgaas <[e-mail]>

> ---
>  drivers/acpi/acpi_extlog.c                         | 10 +++---
>  drivers/acpi/bus.c                                 | 29 ++--------------
>  drivers/acpi/nfit/core.c                           | 40 +++++++++++-----------
>  drivers/acpi/nfit/nfit.h                           |  3 +-
>  drivers/acpi/utils.c                               |  4 +--
>  drivers/char/tpm/tpm_crb.c                         |  9 +++--
>  drivers/char/tpm/tpm_ppi.c                         | 20 +++++------
>  drivers/gpu/drm/i915/intel_acpi.c                  | 14 +++-----
>  drivers/gpu/drm/nouveau/nouveau_acpi.c             | 20 +++++------
>  drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c     |  9 +++--
>  drivers/hid/i2c-hid/i2c-hid.c                      |  9 +++--
>  drivers/iommu/dmar.c                               | 11 +++---
>  drivers/mmc/host/sdhci-pci-core.c                  |  9 +++--
>  drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c | 15 ++++----
>  drivers/pci/pci-acpi.c                             | 11 +++---
>  drivers/pci/pci-label.c                            |  4 +--
>  drivers/thermal/int340x_thermal/int3400_thermal.c  |  8 ++---
>  drivers/usb/dwc3/dwc3-pci.c                        |  6 ++--
>  drivers/usb/host/xhci-pci.c                        |  9 +++--
>  drivers/usb/misc/ucsi.c                            |  2 +-
>  drivers/usb/typec/typec_wcove.c                    |  4 +--
>  include/acpi/acpi_bus.h                            |  9 ++---
>  include/linux/acpi.h                               |  4 +--
>  include/linux/pci-acpi.h                           |  2 +-
>  sound/soc/intel/skylake/skl-nhlt.c                 |  7 ++--
>  tools/testing/nvdimm/test/iomap.c                  |  2 +-
>  tools/testing/nvdimm/test/nfit.c                   |  2 +-
>  27 files changed, 116 insertions(+), 156 deletions(-)
>
> diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
> index 502ea4dc2080..69d6140b6afa 100644
> --- a/drivers/acpi/acpi_extlog.c
> +++ b/drivers/acpi/acpi_extlog.c
> @@ -182,17 +182,17 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
>
>  static bool __init extlog_get_l1addr(void)
>  {
> -       u8 uuid[16];
> +       uuid_le uuid;
>         acpi_handle handle;
>         union acpi_object *obj;
>
> -       acpi_str_to_uuid(extlog_dsm_uuid, uuid);
> -
> +       if (uuid_le_to_bin(extlog_dsm_uuid, &uuid))
> +               return false;
>         if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
>                 return false;
> -       if (!acpi_check_dsm(handle, uuid, EXTLOG_DSM_REV, 1 << EXTLOG_FN_ADDR))
> +       if (!acpi_check_dsm(handle, &uuid, EXTLOG_DSM_REV, 1 << EXTLOG_FN_ADDR))
>                 return false;
> -       obj = acpi_evaluate_dsm_typed(handle, uuid, EXTLOG_DSM_REV,
> +       obj = acpi_evaluate_dsm_typed(handle, &uuid, EXTLOG_DSM_REV,
>                                       EXTLOG_FN_ADDR, NULL, ACPI_TYPE_INTEGER);
>         if (!obj) {
>                 return false;
> diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
> index 784bda663d16..e8130a4873e9 100644
> --- a/drivers/acpi/bus.c
> +++ b/drivers/acpi/bus.c
> @@ -196,42 +196,19 @@ static void acpi_print_osc_error(acpi_handle handle,
>         pr_debug("\n");
>  }
>
> -acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
> -{
> -       int i;
> -       static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
> -               24, 26, 28, 30, 32, 34};
> -
> -       if (strlen(str) != 36)
> -               return AE_BAD_PARAMETER;
> -       for (i = 0; i < 36; i++) {
> -               if (i == 8 || i == 13 || i == 18 || i == 23) {
> -                       if (str[i] != '-')
> -                               return AE_BAD_PARAMETER;
> -               } else if (!isxdigit(str[i]))
> -                       return AE_BAD_PARAMETER;
> -       }
> -       for (i = 0; i < 16; i++) {
> -               uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
> -               uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
> -       }
> -       return AE_OK;
> -}
> -EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
> -
>  acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
>  {
>         acpi_status status;
>         struct acpi_object_list input;
>         union acpi_object in_params[4];
>         union acpi_object *out_obj;
> -       u8 uuid[16];
> +       uuid_le uuid;
>         u32 errors;
>         struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
>
>         if (!context)
>                 return AE_ERROR;
> -       if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
> +       if (uuid_le_to_bin(context->uuid_str, &uuid))
>                 return AE_ERROR;
>         context->ret.length = ACPI_ALLOCATE_BUFFER;
>         context->ret.pointer = NULL;
> @@ -241,7 +218,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
>         input.pointer = in_params;
>         in_params[0].type               = ACPI_TYPE_BUFFER;
>         in_params[0].buffer.length      = 16;
> -       in_params[0].buffer.pointer     = uuid;
> +       in_params[0].buffer.pointer     = (u8 *)&uuid;
>         in_params[1].type               = ACPI_TYPE_INTEGER;
>         in_params[1].integer.value      = context->rev;
>         in_params[2].type               = ACPI_TYPE_INTEGER;
> diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
> index 0f7982a1caaf..bd3e45ede056 100644
> --- a/drivers/acpi/nfit/core.c
> +++ b/drivers/acpi/nfit/core.c
> @@ -74,11 +74,11 @@ struct nfit_table_prev {
>         struct list_head flushes;
>  };
>
> -static u8 nfit_uuid[NFIT_UUID_MAX][16];
> +static uuid_le nfit_uuid[NFIT_UUID_MAX];
>
> -const u8 *to_nfit_uuid(enum nfit_uuids id)
> +const uuid_le *to_nfit_uuid(enum nfit_uuids id)
>  {
> -       return nfit_uuid[id];
> +       return &nfit_uuid[id];
>  }
>  EXPORT_SYMBOL(to_nfit_uuid);
>
> @@ -207,7 +207,7 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
>         u32 offset, fw_status = 0;
>         acpi_handle handle;
>         unsigned int func;
> -       const u8 *uuid;
> +       const uuid_le *uuid;
>         int rc, i;
>
>         func = cmd;
> @@ -394,7 +394,7 @@ int nfit_spa_type(struct acpi_nfit_system_address *spa)
>         int i;
>
>         for (i = 0; i < NFIT_UUID_MAX; i++)
> -               if (memcmp(to_nfit_uuid(i), spa->range_guid, 16) == 0)
> +               if (!uuid_le_cmp_pp(to_nfit_uuid(i), (uuid_le *)spa->range_guid))
>                         return i;
>         return -1;
>  }
> @@ -1400,7 +1400,7 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
>         struct acpi_device *adev, *adev_dimm;
>         struct device *dev = acpi_desc->dev;
>         unsigned long dsm_mask;
> -       const u8 *uuid;
> +       const uuid_le *uuid = to_nfit_uuid(NFIT_DEV_DIMM);
>         int i;
>         int family = -1;
>
> @@ -1596,7 +1596,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
>  static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
>  {
>         struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
> -       const u8 *uuid = to_nfit_uuid(NFIT_DEV_BUS);
> +       const uuid_le *uuid = to_nfit_uuid(NFIT_DEV_BUS);
>         struct acpi_device *adev;
>         int i;
>
> @@ -3036,19 +3036,19 @@ static __init int nfit_init(void)
>         BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80);
>         BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40);
>
> -       acpi_str_to_uuid(UUID_VOLATILE_MEMORY, nfit_uuid[NFIT_SPA_VOLATILE]);
> -       acpi_str_to_uuid(UUID_PERSISTENT_MEMORY, nfit_uuid[NFIT_SPA_PM]);
> -       acpi_str_to_uuid(UUID_CONTROL_REGION, nfit_uuid[NFIT_SPA_DCR]);
> -       acpi_str_to_uuid(UUID_DATA_REGION, nfit_uuid[NFIT_SPA_BDW]);
> -       acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_VDISK]);
> -       acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_CD, nfit_uuid[NFIT_SPA_VCD]);
> -       acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_PDISK]);
> -       acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_CD, nfit_uuid[NFIT_SPA_PCD]);
> -       acpi_str_to_uuid(UUID_NFIT_BUS, nfit_uuid[NFIT_DEV_BUS]);
> -       acpi_str_to_uuid(UUID_NFIT_DIMM, nfit_uuid[NFIT_DEV_DIMM]);
> -       acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE1, nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
> -       acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE2, nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
> -       acpi_str_to_uuid(UUID_NFIT_DIMM_N_MSFT, nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
> +       uuid_le_to_bin(UUID_VOLATILE_MEMORY, &nfit_uuid[NFIT_SPA_VOLATILE]);
> +       uuid_le_to_bin(UUID_PERSISTENT_MEMORY, &nfit_uuid[NFIT_SPA_PM]);
> +       uuid_le_to_bin(UUID_CONTROL_REGION, &nfit_uuid[NFIT_SPA_DCR]);
> +       uuid_le_to_bin(UUID_DATA_REGION, &nfit_uuid[NFIT_SPA_BDW]);
> +       uuid_le_to_bin(UUID_VOLATILE_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_VDISK]);
> +       uuid_le_to_bin(UUID_VOLATILE_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_VCD]);
> +       uuid_le_to_bin(UUID_PERSISTENT_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_PDISK]);
> +       uuid_le_to_bin(UUID_PERSISTENT_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_PCD]);
> +       uuid_le_to_bin(UUID_NFIT_BUS, &nfit_uuid[NFIT_DEV_BUS]);
> +       uuid_le_to_bin(UUID_NFIT_DIMM, &nfit_uuid[NFIT_DEV_DIMM]);
> +       uuid_le_to_bin(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
> +       uuid_le_to_bin(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
> +       uuid_le_to_bin(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
>
>         nfit_wq = create_singlethread_workqueue("nfit");
>         if (!nfit_wq)
> diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
> index 58fb7d68e04a..2f233b28709f 100644
> --- a/drivers/acpi/nfit/nfit.h
> +++ b/drivers/acpi/nfit/nfit.h
> @@ -18,7 +18,6 @@
>  #include <linux/libnvdimm.h>
>  #include <linux/ndctl.h>
>  #include <linux/types.h>
> -#include <linux/uuid.h>
>  #include <linux/acpi.h>
>  #include <acpi/acuuid.h>
>
> @@ -237,7 +236,7 @@ static inline struct acpi_nfit_desc *to_acpi_desc(
>         return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
>  }
>
> -const u8 *to_nfit_uuid(enum nfit_uuids id);
> +const uuid_le *to_nfit_uuid(enum nfit_uuids id);
>  int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
>  void acpi_nfit_shutdown(void *data);
>  void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
> diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
> index 27d0dcfcf47d..bbe8a950e508 100644
> --- a/drivers/acpi/utils.c
> +++ b/drivers/acpi/utils.c
> @@ -625,7 +625,7 @@ acpi_status acpi_evaluate_lck(acpi_handle handle, int lock)
>   * some old BIOSes do expect a buffer or an integer etc.
>   */
>  union acpi_object *
> -acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 func,
> +acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 func,
>                   union acpi_object *argv4)
>  {
>         acpi_status ret;
> @@ -674,7 +674,7 @@ EXPORT_SYMBOL(acpi_evaluate_dsm);
>   * functions. Currently only support 64 functions at maximum, should be
>   * enough for now.
>   */
> -bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 funcs)
> +bool acpi_check_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 funcs)
>  {
>         int i;
>         u64 mask = 0;
> diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
> index b917b9d5f710..f789f7e5a17d 100644
> --- a/drivers/char/tpm/tpm_crb.c
> +++ b/drivers/char/tpm/tpm_crb.c
> @@ -27,10 +27,9 @@
>
>  #define ACPI_SIG_TPM2 "TPM2"
>
> -static const u8 CRB_ACPI_START_UUID[] = {
> -       /* 0000 */ 0xAB, 0x6C, 0xBF, 0x6B, 0x63, 0x54, 0x14, 0x47,
> -       /* 0008 */ 0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4
> -};
> +static const uuid_le crb_acpi_start_uuid =
> +       UUID_LE(0x6BBF6CAB, 0x5463, 0x4714,
> +               0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4);
>
>  enum crb_defaults {
>         CRB_ACPI_START_REVISION_ID = 1,
> @@ -266,7 +265,7 @@ static int crb_do_acpi_start(struct tpm_chip *chip)
>         int rc;
>
>         obj = acpi_evaluate_dsm(chip->acpi_dev_handle,
> -                               CRB_ACPI_START_UUID,
> +                               &crb_acpi_start_uuid,
>                                 CRB_ACPI_START_REVISION_ID,
>                                 CRB_ACPI_START_INDEX,
>                                 NULL);
> diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
> index 692a2c6ae036..7cf682426361 100644
> --- a/drivers/char/tpm/tpm_ppi.c
> +++ b/drivers/char/tpm/tpm_ppi.c
> @@ -32,20 +32,16 @@
>  #define PPI_VS_REQ_START       128
>  #define PPI_VS_REQ_END         255
>
> -static const u8 tpm_ppi_uuid[] = {
> -       0xA6, 0xFA, 0xDD, 0x3D,
> -       0x1B, 0x36,
> -       0xB4, 0x4E,
> -       0xA4, 0x24,
> -       0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53
> -};
> +static const uuid_le tpm_ppi_uuid =
> +       UUID_LE(0x3DDDFAA6, 0x361B, 0x4EB4,
> +               0xA4, 0x24, 0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53);
>
>  static inline union acpi_object *
>  tpm_eval_dsm(acpi_handle ppi_handle, int func, acpi_object_type type,
>              union acpi_object *argv4)
>  {
>         BUG_ON(!ppi_handle);
> -       return acpi_evaluate_dsm_typed(ppi_handle, tpm_ppi_uuid,
> +       return acpi_evaluate_dsm_typed(ppi_handle, &tpm_ppi_uuid,
>                                        TPM_PPI_REVISION_ID,
>                                        func, argv4, type);
>  }
> @@ -107,7 +103,7 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
>          * is updated with function index from SUBREQ to SUBREQ2 since PPI
>          * version 1.1
>          */
> -       if (acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
> +       if (acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_uuid,
>                            TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_SUBREQ2))
>                 func = TPM_PPI_FN_SUBREQ2;
>
> @@ -268,7 +264,7 @@ static ssize_t show_ppi_operations(acpi_handle dev_handle, char *buf, u32 start,
>                 "User not required",
>         };
>
> -       if (!acpi_check_dsm(dev_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
> +       if (!acpi_check_dsm(dev_handle, &tpm_ppi_uuid, TPM_PPI_REVISION_ID,
>                             1 << TPM_PPI_FN_GETOPR))
>                 return -EPERM;
>
> @@ -341,12 +337,12 @@ void tpm_add_ppi(struct tpm_chip *chip)
>         if (!chip->acpi_dev_handle)
>                 return;
>
> -       if (!acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
> +       if (!acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_uuid,
>                             TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_VERSION))
>                 return;
>
>         /* Cache PPI version string. */
> -       obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, tpm_ppi_uuid,
> +       obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, &tpm_ppi_uuid,
>                                       TPM_PPI_REVISION_ID, TPM_PPI_FN_VERSION,
>                                       NULL, ACPI_TYPE_STRING);
>         if (obj) {
> diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
> index eb638a1e69d2..72bfe6ceadf8 100644
> --- a/drivers/gpu/drm/i915/intel_acpi.c
> +++ b/drivers/gpu/drm/i915/intel_acpi.c
> @@ -15,13 +15,9 @@ static struct intel_dsm_priv {
>         acpi_handle dhandle;
>  } intel_dsm_priv;
>
> -static const u8 intel_dsm_guid[] = {
> -       0xd3, 0x73, 0xd8, 0x7e,
> -       0xd0, 0xc2,
> -       0x4f, 0x4e,
> -       0xa8, 0x54,
> -       0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c
> -};
> +static const uuid_le intel_dsm_guid =
> +       UUID_LE(0x7ed873d3, 0xc2d0, 0x4e4f,
> +               0xa8, 0x54, 0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c);
>
>  static char *intel_dsm_port_name(u8 id)
>  {
> @@ -80,7 +76,7 @@ static void intel_dsm_platform_mux_info(void)
>         int i;
>         union acpi_object *pkg, *connector_count;
>
> -       pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, intel_dsm_guid,
> +       pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, &intel_dsm_guid,
>                         INTEL_DSM_REVISION_ID, INTEL_DSM_FN_PLATFORM_MUX_INFO,
>                         NULL, ACPI_TYPE_PACKAGE);
>         if (!pkg) {
> @@ -118,7 +114,7 @@ static bool intel_dsm_pci_probe(struct pci_dev *pdev)
>         if (!dhandle)
>                 return false;
>
> -       if (!acpi_check_dsm(dhandle, intel_dsm_guid, INTEL_DSM_REVISION_ID,
> +       if (!acpi_check_dsm(dhandle, &intel_dsm_guid, INTEL_DSM_REVISION_ID,
>                             1 << INTEL_DSM_FN_PLATFORM_MUX_INFO)) {
>                 DRM_DEBUG_KMS("no _DSM method for intel device\n");
>                 return false;
> diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
> index 39468c218027..faea23276d4a 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
> @@ -60,15 +60,13 @@ bool nouveau_is_v1_dsm(void) {
>  }
>
>  #ifdef CONFIG_VGA_SWITCHEROO
> -static const char nouveau_dsm_muid[] = {
> -       0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
> -       0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
> -};
> +static const uuid_le nouveau_dsm_muid =
> +       UUID_LE(0x9D95A0A0, 0x0060, 0x4D48,
> +               0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4);
>
> -static const char nouveau_op_dsm_muid[] = {
> -       0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47,
> -       0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0,
> -};
> +static const uuid_le nouveau_op_dsm_muid =
> +       UUID_LE(0xA486D8F8, 0x0BDA, 0x471B,
> +               0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0);
>
>  static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
>  {
> @@ -86,7 +84,7 @@ static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *
>                 args_buff[i] = (arg >> i * 8) & 0xFF;
>
>         *result = 0;
> -       obj = acpi_evaluate_dsm_typed(handle, nouveau_op_dsm_muid, 0x00000100,
> +       obj = acpi_evaluate_dsm_typed(handle, &nouveau_op_dsm_muid, 0x00000100,
>                                       func, &argv4, ACPI_TYPE_BUFFER);
>         if (!obj) {
>                 acpi_handle_info(handle, "failed to evaluate _DSM\n");
> @@ -138,7 +136,7 @@ static int nouveau_dsm(acpi_handle handle, int func, int arg)
>                 .integer.value = arg,
>         };
>
> -       obj = acpi_evaluate_dsm_typed(handle, nouveau_dsm_muid, 0x00000102,
> +       obj = acpi_evaluate_dsm_typed(handle, &nouveau_dsm_muid, 0x00000102,
>                                       func, &argv4, ACPI_TYPE_INTEGER);
>         if (!obj) {
>                 acpi_handle_info(handle, "failed to evaluate _DSM\n");
> @@ -259,7 +257,7 @@ static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out
>         if (!acpi_has_method(dhandle, "_DSM"))
>                 return;
>
> -       supports_mux = acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102,
> +       supports_mux = acpi_check_dsm(dhandle, &nouveau_dsm_muid, 0x00000102,
>                                       1 << NOUVEAU_DSM_POWER);
>         optimus_funcs = nouveau_dsm_get_optimus_functions(dhandle);
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
> index e3e2f5e83815..cc95b8150a86 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
> @@ -81,10 +81,9 @@ mxm_shadow_dsm(struct nvkm_mxm *mxm, u8 version)
>  {
>         struct nvkm_subdev *subdev = &mxm->subdev;
>         struct nvkm_device *device = subdev->device;
> -       static char muid[] = {
> -               0x00, 0xA4, 0x04, 0x40, 0x7D, 0x91, 0xF2, 0x4C,
> -               0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65
> -       };
> +       static uuid_le muid =
> +               UUID_LE(0x4004A400, 0x917D, 0x4CF2,
> +                       0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65);
>         u32 mxms_args[] = { 0x00000000 };
>         union acpi_object argv4 = {
>                 .buffer.type = ACPI_TYPE_BUFFER,
> @@ -105,7 +104,7 @@ mxm_shadow_dsm(struct nvkm_mxm *mxm, u8 version)
>          * unless you pass in exactly the version it supports..
>          */
>         rev = (version & 0xf0) << 4 | (version & 0x0f);
> -       obj = acpi_evaluate_dsm(handle, muid, rev, 0x00000010, &argv4);
> +       obj = acpi_evaluate_dsm(handle, &muid, rev, 0x00000010, &argv4);
>         if (!obj) {
>                 nvkm_debug(subdev, "DSM MXMS failed\n");
>                 return false;
> diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
> index 8daa8ce64ebb..f83bd717cdd5 100644
> --- a/drivers/hid/i2c-hid/i2c-hid.c
> +++ b/drivers/hid/i2c-hid/i2c-hid.c
> @@ -872,10 +872,9 @@ static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
>  static int i2c_hid_acpi_pdata(struct i2c_client *client,
>                 struct i2c_hid_platform_data *pdata)
>  {
> -       static u8 i2c_hid_guid[] = {
> -               0xF7, 0xF6, 0xDF, 0x3C, 0x67, 0x42, 0x55, 0x45,
> -               0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE,
> -       };
> +       static uuid_le i2c_hid_guid =
> +               UUID_LE(0x3CDFF6F7, 0x4267, 0x4555,
> +                       0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
>         union acpi_object *obj;
>         struct acpi_device *adev;
>         acpi_handle handle;
> @@ -884,7 +883,7 @@ static int i2c_hid_acpi_pdata(struct i2c_client *client,
>         if (!handle || acpi_bus_get_device(handle, &adev))
>                 return -ENODEV;
>
> -       obj = acpi_evaluate_dsm_typed(handle, i2c_hid_guid, 1, 1, NULL,
> +       obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL,
>                                       ACPI_TYPE_INTEGER);
>         if (!obj) {
>                 dev_err(&client->dev, "device _DSM execution failed\n");
> diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
> index cbf7763d8091..420d51b286ad 100644
> --- a/drivers/iommu/dmar.c
> +++ b/drivers/iommu/dmar.c
> @@ -1808,10 +1808,9 @@ IOMMU_INIT_POST(detect_intel_iommu);
>   * for Directed-IO Architecture Specifiction, Rev 2.2, Section 8.8
>   * "Remapping Hardware Unit Hot Plug".
>   */
> -static u8 dmar_hp_uuid[] = {
> -       /* 0000 */    0xA6, 0xA3, 0xC1, 0xD8, 0x9B, 0xBE, 0x9B, 0x4C,
> -       /* 0008 */    0x91, 0xBF, 0xC3, 0xCB, 0x81, 0xFC, 0x5D, 0xAF
> -};
> +static uuid_le dmar_hp_uuid =
> +       UUID_LE(0xD8C1A3A6, 0xBE9B, 0x4C9B,
> +               0x91, 0xBF, 0xC3, 0xCB, 0x81, 0xFC, 0x5D, 0xAF);
>
>  /*
>   * Currently there's only one revision and BIOS will not check the revision id,
> @@ -1824,7 +1823,7 @@ static u8 dmar_hp_uuid[] = {
>
>  static inline bool dmar_detect_dsm(acpi_handle handle, int func)
>  {
> -       return acpi_check_dsm(handle, dmar_hp_uuid, DMAR_DSM_REV_ID, 1 << func);
> +       return acpi_check_dsm(handle, &dmar_hp_uuid, DMAR_DSM_REV_ID, 1 << func);
>  }
>
>  static int dmar_walk_dsm_resource(acpi_handle handle, int func,
> @@ -1843,7 +1842,7 @@ static int dmar_walk_dsm_resource(acpi_handle handle, int func,
>         if (!dmar_detect_dsm(handle, func))
>                 return 0;
>
> -       obj = acpi_evaluate_dsm_typed(handle, dmar_hp_uuid, DMAR_DSM_REV_ID,
> +       obj = acpi_evaluate_dsm_typed(handle, &dmar_hp_uuid, DMAR_DSM_REV_ID,
>                                       func, NULL, ACPI_TYPE_BUFFER);
>         if (!obj)
>                 return -ENODEV;
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index 92fc3f7c538d..262b8c320d7c 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -404,10 +404,9 @@ struct intel_host {
>         bool    d3_retune;
>  };
>
> -const u8 intel_dsm_uuid[] = {
> -       0xA5, 0x3E, 0xC1, 0xF6, 0xCD, 0x65, 0x1F, 0x46,
> -       0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61,
> -};
> +const uuid_le intel_dsm_uuid =
> +       UUID_LE(0xF6C13EA5, 0x65CD, 0x461F,
> +               0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
>
>  static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
>                        unsigned int fn, u32 *result)
> @@ -416,7 +415,7 @@ static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
>         int err = 0;
>         size_t len;
>
> -       obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), intel_dsm_uuid, 0, fn, NULL);
> +       obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_uuid, 0, fn, NULL);
>         if (!obj)
>                 return -EOPNOTSUPP;
>
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
> index e13aa064a8e9..02842fe7f1d0 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
> @@ -29,10 +29,9 @@ enum _dsm_rst_type {
>         HNS_ROCE_RESET_FUNC     = 0x7,
>  };
>
> -const u8 hns_dsaf_acpi_dsm_uuid[] = {
> -       0x1A, 0xAA, 0x85, 0x1A, 0x93, 0xE2, 0x5E, 0x41,
> -       0x8E, 0x28, 0x8D, 0x69, 0x0A, 0x0F, 0x82, 0x0A
> -};
> +const uuid_le hns_dsaf_acpi_dsm_uuid =
> +       UUID_LE(0x1A85AA1A, 0xE293, 0x415E,
> +               0x8E, 0x28, 0x8D, 0x69, 0x0A, 0x0F, 0x82, 0x0A);
>
>  static void dsaf_write_sub(struct dsaf_device *dsaf_dev, u32 reg, u32 val)
>  {
> @@ -151,7 +150,7 @@ static void hns_dsaf_acpi_srst_by_port(struct dsaf_device *dsaf_dev, u8 op_type,
>         argv4.package.elements = obj_args;
>
>         obj = acpi_evaluate_dsm(ACPI_HANDLE(dsaf_dev->dev),
> -                               hns_dsaf_acpi_dsm_uuid, 0, op_type, &argv4);
> +                               &hns_dsaf_acpi_dsm_uuid, 0, op_type, &argv4);
>         if (!obj) {
>                 dev_warn(dsaf_dev->dev, "reset port_type%d port%d fail!",
>                          port_type, port);
> @@ -434,7 +433,7 @@ static phy_interface_t hns_mac_get_phy_if_acpi(struct hns_mac_cb *mac_cb)
>         argv4.package.elements = &obj_args,
>
>         obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dev),
> -                               hns_dsaf_acpi_dsm_uuid, 0,
> +                               &hns_dsaf_acpi_dsm_uuid, 0,
>                                 HNS_OP_GET_PORT_TYPE_FUNC, &argv4);
>
>         if (!obj || obj->type != ACPI_TYPE_INTEGER)
> @@ -474,7 +473,7 @@ int hns_mac_get_sfp_prsnt_acpi(struct hns_mac_cb *mac_cb, int *sfp_prsnt)
>         argv4.package.elements = &obj_args,
>
>         obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dev),
> -                               hns_dsaf_acpi_dsm_uuid, 0,
> +                               &hns_dsaf_acpi_dsm_uuid, 0,
>                                 HNS_OP_GET_SFP_STAT_FUNC, &argv4);
>
>         if (!obj || obj->type != ACPI_TYPE_INTEGER)
> @@ -565,7 +564,7 @@ hns_mac_config_sds_loopback_acpi(struct hns_mac_cb *mac_cb, bool en)
>         argv4.package.elements = obj_args;
>
>         obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dsaf_dev->dev),
> -                               hns_dsaf_acpi_dsm_uuid, 0,
> +                               &hns_dsaf_acpi_dsm_uuid, 0,
>                                 HNS_OP_SERDES_LP_FUNC, &argv4);
>         if (!obj) {
>                 dev_warn(mac_cb->dsaf_dev->dev, "set port%d serdes lp fail!",
> diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
> index 001860361434..eb612123e0dd 100644
> --- a/drivers/pci/pci-acpi.c
> +++ b/drivers/pci/pci-acpi.c
> @@ -24,10 +24,9 @@
>   * The UUID is defined in the PCI Firmware Specification available here:
>   * https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf
>   */
> -const u8 pci_acpi_dsm_uuid[] = {
> -       0xd0, 0x37, 0xc9, 0xe5, 0x53, 0x35, 0x7a, 0x4d,
> -       0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d
> -};
> +const uuid_le pci_acpi_dsm_uuid =
> +       UUID_LE(0xe5c937d0, 0x3553, 0x4d7a,
> +               0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d);
>
>  #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
>  static int acpi_get_rc_addr(struct acpi_device *adev, struct resource *res)
> @@ -680,7 +679,7 @@ void acpi_pci_add_bus(struct pci_bus *bus)
>         if (!pci_is_root_bus(bus))
>                 return;
>
> -       obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), pci_acpi_dsm_uuid, 3,
> +       obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_uuid, 3,
>                                 RESET_DELAY_DSM, NULL);
>         if (!obj)
>                 return;
> @@ -745,7 +744,7 @@ static void pci_acpi_optimize_delay(struct pci_dev *pdev,
>         if (bridge->ignore_reset_delay)
>                 pdev->d3cold_delay = 0;
>
> -       obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 3,
> +       obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_uuid, 3,
>                                 FUNCTION_DELAY_DSM, NULL);
>         if (!obj)
>                 return;
> diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
> index 51357377efbc..a2c04229f1dc 100644
> --- a/drivers/pci/pci-label.c
> +++ b/drivers/pci/pci-label.c
> @@ -172,7 +172,7 @@ static int dsm_get_label(struct device *dev, char *buf,
>         if (!handle)
>                 return -1;
>
> -       obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 0x2,
> +       obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_uuid, 0x2,
>                                 DEVICE_LABEL_DSM, NULL);
>         if (!obj)
>                 return -1;
> @@ -212,7 +212,7 @@ static bool device_has_dsm(struct device *dev)
>         if (!handle)
>                 return false;
>
> -       return !!acpi_check_dsm(handle, pci_acpi_dsm_uuid, 0x2,
> +       return !!acpi_check_dsm(handle, &pci_acpi_dsm_uuid, 0x2,
>                                 1 << DEVICE_LABEL_DSM);
>  }
>
> diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c b/drivers/thermal/int340x_thermal/int3400_thermal.c
> index 9413c4abf0b9..c0eb3bb19b23 100644
> --- a/drivers/thermal/int340x_thermal/int3400_thermal.c
> +++ b/drivers/thermal/int340x_thermal/int3400_thermal.c
> @@ -23,7 +23,7 @@ enum int3400_thermal_uuid {
>         INT3400_THERMAL_MAXIMUM_UUID,
>  };
>
> -static u8 *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
> +static const char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
>         "42A441D6-AE6A-462b-A84B-4A8CE79027D3",
>         "3A95C389-E4B8-4629-A526-C52C88626BAE",
>         "97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
> @@ -141,10 +141,10 @@ static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
>                 }
>
>                 for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
> -                       u8 uuid[16];
> +                       uuid_le u;
>
> -                       acpi_str_to_uuid(int3400_thermal_uuids[j], uuid);
> -                       if (!strncmp(uuid, objb->buffer.pointer, 16)) {
> +                       uuid_le_to_bin(int3400_thermal_uuids[j], &u);
> +                       if (!uuid_le_cmp(*(uuid_le *)objb->buffer.pointer), u) {
>                                 priv->uuid_bitmap |= (1 << j);
>                                 break;
>                         }
> diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
> index a15ec71d0423..6b5284ec76df 100644
> --- a/drivers/usb/dwc3/dwc3-pci.c
> +++ b/drivers/usb/dwc3/dwc3-pci.c
> @@ -56,7 +56,7 @@ struct dwc3_pci {
>         struct platform_device *dwc3;
>         struct pci_dev *pci;
>
> -       u8 uuid[16];
> +       uuid_le uuid;
>
>         unsigned int has_dsm_for_pm:1;
>  };
> @@ -118,7 +118,7 @@ static int dwc3_pci_quirks(struct dwc3_pci *dwc)
>
>                 if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
>                                 pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
> -                       acpi_str_to_uuid(PCI_INTEL_BXT_DSM_UUID, dwc->uuid);
> +                       uuid_le_to_bin(PCI_INTEL_BXT_DSM_UUID, &dwc->uuid);
>                         dwc->has_dsm_for_pm = true;
>                 }
>
> @@ -288,7 +288,7 @@ static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
>         tmp.type = ACPI_TYPE_INTEGER;
>         tmp.integer.value = param;
>
> -       obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), dwc->uuid,
> +       obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->uuid,
>                         1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
>         if (!obj) {
>                 dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index 7b86508ac8cf..93b4f0de9418 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -210,13 +210,12 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
>  #ifdef CONFIG_ACPI
>  static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
>  {
> -       static const u8 intel_dsm_uuid[] = {
> -               0xb7, 0x0c, 0x34, 0xac, 0x01, 0xe9, 0xbf, 0x45,
> -               0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23,
> -       };
> +       static const uuid_le intel_dsm_uuid =
> +               UUID_LE(0xac340cb7, 0xe901, 0x45bf,
> +                       0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23);
>         union acpi_object *obj;
>
> -       obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), intel_dsm_uuid, 3, 1,
> +       obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), &intel_dsm_uuid, 3, 1,
>                                 NULL);
>         ACPI_FREE(obj);
>  }
> diff --git a/drivers/usb/misc/ucsi.c b/drivers/usb/misc/ucsi.c
> index 07397bddefa3..49e32ffbe59f 100644
> --- a/drivers/usb/misc/ucsi.c
> +++ b/drivers/usb/misc/ucsi.c
> @@ -61,7 +61,7 @@ static int ucsi_acpi_cmd(struct ucsi *ucsi, struct ucsi_control *ctrl)
>
>         ucsi->data->ctrl.raw_cmd = ctrl->raw_cmd;
>
> -       obj = acpi_evaluate_dsm(ACPI_HANDLE(ucsi->dev), uuid.b, 1, 1, NULL);
> +       obj = acpi_evaluate_dsm(ACPI_HANDLE(ucsi->dev), &uuid, 1, 1, NULL);
>         if (!obj) {
>                 dev_err(ucsi->dev, "%s: failed to evaluate _DSM\n", __func__);
>                 return -EIO;
> diff --git a/drivers/usb/typec/typec_wcove.c b/drivers/usb/typec/typec_wcove.c
> index d5a7b21fa3f1..5ce93e0a15ca 100644
> --- a/drivers/usb/typec/typec_wcove.c
> +++ b/drivers/usb/typec/typec_wcove.c
> @@ -118,7 +118,7 @@ static int wcove_typec_func(struct wcove_typec *wcove,
>         tmp.type = ACPI_TYPE_INTEGER;
>         tmp.integer.value = param;
>
> -       obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), uuid.b, 1, func,
> +       obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), &uuid, 1, func,
>                                 &argv4);
>         if (!obj) {
>                 dev_err(wcove->dev, "%s: failed to evaluate _DSM\n", __func__);
> @@ -314,7 +314,7 @@ static int wcove_typec_probe(struct platform_device *pdev)
>         if (ret)
>                 return ret;
>
> -       if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), uuid.b, 0, 0x1f)) {
> +       if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), &uuid, 0, 0x1f)) {
>                 dev_err(&pdev->dev, "Missing _DSM functions\n");
>                 return -ENODEV;
>         }
> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
> index 197f3fffc9a7..0682942d6a76 100644
> --- a/include/acpi/acpi_bus.h
> +++ b/include/acpi/acpi_bus.h
> @@ -61,13 +61,14 @@ bool acpi_ata_match(acpi_handle handle);
>  bool acpi_bay_match(acpi_handle handle);
>  bool acpi_dock_match(acpi_handle handle);
>
> -bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 funcs);
> -union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
> +bool acpi_check_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 funcs);
> +union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid,
>                         u64 rev, u64 func, union acpi_object *argv4);
>
>  static inline union acpi_object *
> -acpi_evaluate_dsm_typed(acpi_handle handle, const u8 *uuid, u64 rev, u64 func,
> -                       union acpi_object *argv4, acpi_object_type type)
> +acpi_evaluate_dsm_typed(acpi_handle handle, const uuid_le *uuid, u64 rev,
> +                       u64 func, union acpi_object *argv4,
> +                       acpi_object_type type)
>  {
>         union acpi_object *obj;
>
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 137e4a3d89c5..66d135003780 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -39,6 +39,7 @@
>  #include <linux/dynamic_debug.h>
>  #include <linux/module.h>
>  #include <linux/mutex.h>
> +#include <linux/uuid.h>
>
>  #include <acpi/acpi_bus.h>
>  #include <acpi/acpi_drivers.h>
> @@ -457,7 +458,6 @@ struct acpi_osc_context {
>         struct acpi_buffer ret;         /* free by caller if success */
>  };
>
> -acpi_status acpi_str_to_uuid(char *str, u8 *uuid);
>  acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
>
>  /* Indexes into _OSC Capabilities Buffer (DWORDs 2 & 3 are device-specific) */
> @@ -741,7 +741,7 @@ static inline bool acpi_driver_match_device(struct device *dev,
>  }
>
>  static inline union acpi_object *acpi_evaluate_dsm(acpi_handle handle,
> -                                                  const u8 *uuid,
> +                                                  const uuid_le *uuid,
>                                                    int rev, int func,
>                                                    union acpi_object *argv4)
>  {
> diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
> index 7a4e83a8c89c..917a6ad0f24d 100644
> --- a/include/linux/pci-acpi.h
> +++ b/include/linux/pci-acpi.h
> @@ -105,7 +105,7 @@ static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
>  static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
>  #endif
>
> -extern const u8 pci_acpi_dsm_uuid[];
> +extern const uuid_le pci_acpi_dsm_uuid;
>  #define DEVICE_LABEL_DSM       0x07
>  #define RESET_DELAY_DSM                0x08
>  #define FUNCTION_DELAY_DSM     0x09
> diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c
> index e3f06672fd6d..b95f659dced5 100644
> --- a/sound/soc/intel/skylake/skl-nhlt.c
> +++ b/sound/soc/intel/skylake/skl-nhlt.c
> @@ -21,8 +21,9 @@
>  #include "skl.h"
>
>  /* Unique identification for getting NHLT blobs */
> -static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45,
> -                               0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53};
> +static uuid_le osc_uuid =
> +       UUID_LE(0xA69F886E, 0x6CEB, 0x4594,
> +               0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
>
>  struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
>  {
> @@ -37,7 +38,7 @@ struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
>                 return NULL;
>         }
>
> -       obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL);
> +       obj = acpi_evaluate_dsm(handle, &osc_uuid, 1, 1, NULL);
>         if (obj && obj->type == ACPI_TYPE_BUFFER) {
>                 nhlt_ptr = (struct nhlt_resource_desc  *)obj->buffer.pointer;
>                 nhlt_table = (struct nhlt_acpi_table *)
> diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
> index 64cae1a5deff..f190f22c53dd 100644
> --- a/tools/testing/nvdimm/test/iomap.c
> +++ b/tools/testing/nvdimm/test/iomap.c
> @@ -370,7 +370,7 @@ acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,
>  }
>  EXPORT_SYMBOL(__wrap_acpi_evaluate_object);
>
> -union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
> +union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid,
>                 u64 rev, u64 func, union acpi_object *argv4)
>  {
>         union acpi_object *obj = ERR_PTR(-ENXIO);
> diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
> index c2187178fb13..145f6ee0234f 100644
> --- a/tools/testing/nvdimm/test/nfit.c
> +++ b/tools/testing/nvdimm/test/nfit.c
> @@ -1559,7 +1559,7 @@ static unsigned long nfit_ctl_handle;
>  union acpi_object *result;
>
>  static union acpi_object *nfit_test_evaluate_dsm(acpi_handle handle,
> -               const u8 *uuid, u64 rev, u64 func, union acpi_object *argv4)
> +               const uuid_le *uuid, u64 rev, u64 func, union acpi_object *argv4)
>  {
>         if (handle != &nfit_ctl_handle)
>                 return ERR_PTR(-ENXIO);
> --
> 2.11.0
>

Benjamin Tissoires May 4, 2017, 3:29 p.m. UTC | #5

On May 04 2017 or thereabouts, Andy Shevchenko wrote:
> acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
> bytes. Instead we convert them to use uuid_le type. At the same time we
> convert current users.
> 
> acpi_str_to_uuid() becomes useless after the conversion and it's safe to
> get rid of it.
> 
> The conversion fixes a potential bug in int340x_thermal as well since
> we have to use memcmp() on binary data.
> 
> Cc: Rafael J. Wysocki <[e-mail]>
> Cc: Mika Westerberg <[e-mail]>
> Cc: Borislav Petkov <[e-mail]>
> Cc: Dan Williams <[e-mail]>
> Cc: Amir Goldstein <[e-mail]>
> Cc: Jarkko Sakkinen <[e-mail]>
> Cc: Jani Nikula <[e-mail]>
> Cc: Ben Skeggs <[e-mail]>
> Cc: Benjamin Tissoires <[e-mail]>
> Cc: Joerg Roedel <[e-mail]>
> Cc: Adrian Hunter <[e-mail]>
> Cc: Yisen Zhuang <[e-mail]>
> Cc: Bjorn Helgaas <[e-mail]>
> Cc: Zhang Rui <[e-mail]>
> Cc: Felipe Balbi <[e-mail]>
> Cc: Mathias Nyman <[e-mail]>
> Cc: Heikki Krogerus <[e-mail]>
> Cc: Liam Girdwood <[e-mail]>
> Cc: Mark Brown <[e-mail]>
> Signed-off-by: Andy Shevchenko <[e-mail]>
> ---

For i2c-hid:
Acked-by: Benjamin Tissoires <[e-mail]>

kernel test robot May 5, 2017, 6:04 a.m. UTC | #6

Hi Andy,

[auto build test ERROR on next-20170503]
[cannot apply to pm/linux-next linus/master linux/master v4.9-rc8 v4.9-rc7 v4.9-rc6 v4.11]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Andy-Shevchenko/ACPI-Switch-to-use-generic-UUID-API/20170505-134225
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from init/main.c:29:0:
>> include/linux/acpi.h:744:16: error: unknown type name 'uuid_le'
             const uuid_le *uuid,
                   ^~~~~~~

vim +/uuid_le +744 include/linux/acpi.h

   738						    const struct device_driver *drv)
   739	{
   740		return false;
   741	}
   742	
   743	static inline union acpi_object *acpi_evaluate_dsm(acpi_handle handle,
 > 744							   const uuid_le *uuid,
   745							   int rev, int func,
   746							   union acpi_object *argv4)
   747	{

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Dan Williams May 5, 2017, 6:20 a.m. UTC | #7

On Thu, May 4, 2017 at 2:21 AM, Andy Shevchenko
<[e-mail]> wrote:
> acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
> bytes. Instead we convert them to use uuid_le type. At the same time we
> convert current users.
>
> acpi_str_to_uuid() becomes useless after the conversion and it's safe to
> get rid of it.
>
> The conversion fixes a potential bug in int340x_thermal as well since
> we have to use memcmp() on binary data.
>
> Cc: Rafael J. Wysocki <[e-mail]>
> Cc: Mika Westerberg <[e-mail]>
> Cc: Borislav Petkov <[e-mail]>
> Cc: Dan Williams <[e-mail]>
> Cc: Amir Goldstein <[e-mail]>
> Cc: Jarkko Sakkinen <[e-mail]>
> Cc: Jani Nikula <[e-mail]>
> Cc: Ben Skeggs <[e-mail]>
> Cc: Benjamin Tissoires <[e-mail]>
> Cc: Joerg Roedel <[e-mail]>
> Cc: Adrian Hunter <[e-mail]>
> Cc: Yisen Zhuang <[e-mail]>
> Cc: Bjorn Helgaas <[e-mail]>
> Cc: Zhang Rui <[e-mail]>
> Cc: Felipe Balbi <[e-mail]>
> Cc: Mathias Nyman <[e-mail]>
> Cc: Heikki Krogerus <[e-mail]>
> Cc: Liam Girdwood <[e-mail]>
> Cc: Mark Brown <[e-mail]>
> Signed-off-by: Andy Shevchenko <[e-mail]>
[..]
> diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
> index 0f7982a1caaf..bd3e45ede056 100644
> --- a/drivers/acpi/nfit/core.c
> +++ b/drivers/acpi/nfit/core.c
> @@ -74,11 +74,11 @@ struct nfit_table_prev {
>         struct list_head flushes;
>  };
>
> -static u8 nfit_uuid[NFIT_UUID_MAX][16];
> +static uuid_le nfit_uuid[NFIT_UUID_MAX];
>
> -const u8 *to_nfit_uuid(enum nfit_uuids id)
> +const uuid_le *to_nfit_uuid(enum nfit_uuids id)
>  {
> -       return nfit_uuid[id];
> +       return &nfit_uuid[id];
>  }
>  EXPORT_SYMBOL(to_nfit_uuid);
>
> @@ -207,7 +207,7 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
>         u32 offset, fw_status = 0;
>         acpi_handle handle;
>         unsigned int func;
> -       const u8 *uuid;
> +       const uuid_le *uuid;
>         int rc, i;
>
>         func = cmd;
> @@ -394,7 +394,7 @@ int nfit_spa_type(struct acpi_nfit_system_address *spa)
>         int i;
>
>         for (i = 0; i < NFIT_UUID_MAX; i++)
> -               if (memcmp(to_nfit_uuid(i), spa->range_guid, 16) == 0)
> +               if (!uuid_le_cmp_pp(to_nfit_uuid(i), (uuid_le *)spa->range_guid))

What is _cmp_pp? Why not _compare?

Other than that, looks ok to me.

Amir Goldstein May 5, 2017, 7:06 a.m. UTC | #8

On Fri, May 5, 2017 at 9:20 AM, Dan Williams <[e-mail]> wrote:
> On Thu, May 4, 2017 at 2:21 AM, Andy Shevchenko
> <[e-mail]> wrote:
>> acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
>> bytes. Instead we convert them to use uuid_le type. At the same time we
>> convert current users.
>>
>> acpi_str_to_uuid() becomes useless after the conversion and it's safe to
>> get rid of it.
>>
>> The conversion fixes a potential bug in int340x_thermal as well since
>> we have to use memcmp() on binary data.
>>
>> Cc: Rafael J. Wysocki <[e-mail]>
>> Cc: Mika Westerberg <[e-mail]>
>> Cc: Borislav Petkov <[e-mail]>
>> Cc: Dan Williams <[e-mail]>
>> Cc: Amir Goldstein <[e-mail]>
>> Cc: Jarkko Sakkinen <[e-mail]>
>> Cc: Jani Nikula <[e-mail]>
>> Cc: Ben Skeggs <[e-mail]>
>> Cc: Benjamin Tissoires <[e-mail]>
>> Cc: Joerg Roedel <[e-mail]>
>> Cc: Adrian Hunter <[e-mail]>
>> Cc: Yisen Zhuang <[e-mail]>
>> Cc: Bjorn Helgaas <[e-mail]>
>> Cc: Zhang Rui <[e-mail]>
>> Cc: Felipe Balbi <[e-mail]>
>> Cc: Mathias Nyman <[e-mail]>
>> Cc: Heikki Krogerus <[e-mail]>
>> Cc: Liam Girdwood <[e-mail]>
>> Cc: Mark Brown <[e-mail]>
>> Signed-off-by: Andy Shevchenko <[e-mail]>
> [..]
>> diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
>> index 0f7982a1caaf..bd3e45ede056 100644
>> --- a/drivers/acpi/nfit/core.c
>> +++ b/drivers/acpi/nfit/core.c
>> @@ -74,11 +74,11 @@ struct nfit_table_prev {
>>         struct list_head flushes;
>>  };
>>
>> -static u8 nfit_uuid[NFIT_UUID_MAX][16];
>> +static uuid_le nfit_uuid[NFIT_UUID_MAX];
>>
>> -const u8 *to_nfit_uuid(enum nfit_uuids id)
>> +const uuid_le *to_nfit_uuid(enum nfit_uuids id)
>>  {
>> -       return nfit_uuid[id];
>> +       return &nfit_uuid[id];
>>  }
>>  EXPORT_SYMBOL(to_nfit_uuid);
>>
>> @@ -207,7 +207,7 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
>>         u32 offset, fw_status = 0;
>>         acpi_handle handle;
>>         unsigned int func;
>> -       const u8 *uuid;
>> +       const uuid_le *uuid;
>>         int rc, i;
>>
>>         func = cmd;
>> @@ -394,7 +394,7 @@ int nfit_spa_type(struct acpi_nfit_system_address *spa)
>>         int i;
>>
>>         for (i = 0; i < NFIT_UUID_MAX; i++)
>> -               if (memcmp(to_nfit_uuid(i), spa->range_guid, 16) == 0)
>> +               if (!uuid_le_cmp_pp(to_nfit_uuid(i), (uuid_le *)spa->range_guid))
>
> What is _cmp_pp? Why not _compare?
>

I second that.

Andy,

I much rather that you sort out uuid helpers in a way that will
satisfy the filesystem
needs (just provide the helpers don't need to convert filesystems code).

The only reason I took a swing at hoisting the xfs uuid helpers is
because it didn't
seem like your proposal was going to be posted soon or wasn't going to satisfy
the filesystems use case.

My opinion now, is that your suggestion is probably much closer to the real deal
than mine.

IMO, you should acknowledge that the common use case for filesystems is
to handle an opaque char[16] which most likely holds a uuid_be and you
should provide 'neutral' helpers to satisfy this use case.

The simplest would be to typedef uuid_t to struct uuid_be and to name 'neutral'
helpers' uuid_cmp/uuid_copy(uuid_t *, uuid_t *), similar to my proposal.

I think with this semantic change, our proposals can reach common grounds
and satisfy a wider group of users (i.e. filesystem developers).

Christoph also suggested a similar treatment to typedef guid_t to
struct uuid_le.
I don't know the use cases enough to comment on that.

Cheers,
Amir.

Christoph Hellwig May 5, 2017, 7:30 a.m. UTC | #9

On Fri, May 05, 2017 at 10:06:06AM +0300, Amir Goldstein wrote:
> I much rather that you sort out uuid helpers in a way that will
> satisfy the filesystem
> needs (just provide the helpers don't need to convert filesystems code).

Yeah.

> IMO, you should acknowledge that the common use case for filesystems is
> to handle an opaque char[16] which most likely holds a uuid_be and you
> should provide 'neutral' helpers to satisfy this use case.
> 
> The simplest would be to typedef uuid_t to struct uuid_be and to name 'neutral'
> helpers' uuid_cmp/uuid_copy(uuid_t *, uuid_t *), similar to my proposal.

It's not jut neutral, it's the right thing to to.  The Apollo / DCE
uuids (later also specified in RFC 4122) are big endian, so we should
use the name there.

> Christoph also suggested a similar treatment to typedef guid_t to
> struct uuid_le.

Exactly.  The whole idea of "little endian UUIDs" comes from the
Wintel world, and if you look at the relevant specs they are almost
exclusively referred to as GUIDs.

The magic XFS and AFS types for specific interpretations of one of
the RFC4122 formats don't really help, but I'll just send a patch
to kill them off for XFS ASAP to at least get that out, and we
probably should revert at least

"afs: Move UUID struct to linux/uuid.h"

That moved the AFS mess to common code as a start, and then
also clean up the way we generate random UUIDs, where we currently
have le helper, a be helper and then also generate_random_uuid
just to confuse the heck out of people.  With no description of
either of them.

Andy Shevchenko May 5, 2017, 9:24 a.m. UTC | #10

On Fri, 2017-05-05 at 10:06 +0300, Amir Goldstein wrote:
> On Fri, May 5, 2017 at 9:20 AM, Dan Williams <[e-mail]
> > wrote:
> > On Thu, May 4, 2017 at 2:21 AM, Andy Shevchenko
> > <[e-mail]> wrote:


> > >         for (i = 0; i < NFIT_UUID_MAX; i++)
> > > -               if (memcmp(to_nfit_uuid(i), spa->range_guid, 16)
> > > == 0)
> > > +               if (!uuid_le_cmp_pp(to_nfit_uuid(i), (uuid_le
> > > *)spa->range_guid))
> > 
> > What is _cmp_pp? Why not _compare?

Dan, it's a typo. In this patch it should be just ..._cmp(), which is
already a part of API.

> > 
> 
> I second that.
> 
> Andy,

Amir, just to be clear. This patch can be applied without any addons to
an existing API. Above is just a typo due to rebase in my tree. I will
replace it to just uuid_le_cmp().

> I much rather that you sort out uuid helpers in a way that will
> satisfy the filesystem
> needs (just provide the helpers don't need to convert filesystems
> code).

> The only reason I took a swing at hoisting the xfs uuid helpers is
> because it didn't
> seem like your proposal was going to be posted soon or wasn't going to
> satisfy
> the filesystems use case.

> 
> My opinion now, is that your suggestion is probably much closer to the
> real deal
> than mine.
> 
> IMO, you should acknowledge that the common use case for filesystems
> is
> to handle an opaque char[16] which most likely holds a uuid_be and you
> should provide 'neutral' helpers to satisfy this use case.
> 
> The simplest would be to typedef uuid_t to struct uuid_be and to name
> 'neutral'
> helpers' uuid_cmp/uuid_copy(uuid_t *, uuid_t *), similar to my
> proposal.

> I think with this semantic change, our proposals can reach common
> grounds
> and satisfy a wider group of users (i.e. filesystem developers).
> 
> Christoph also suggested a similar treatment to typedef guid_t to
> struct uuid_le.
> I don't know the use cases enough to comment on that.

We may go this way. But I wouldn't prevent current users of uuid_le to
continue using it without conversion (it may be done case by case after
we settle an API)

So, summarize what Christoph said it will look like

typedef uuid_be uuid_t;
typedef uuid_le guid_t

uuid_cmp() / uuid_copy() / uuid_to_bin() / etc
guid_cmp() / guid_copy() / guid_to_bin() / etc

Correct? Christoph?

Amir Goldstein May 5, 2017, 9:50 a.m. UTC | #11

On Fri, May 5, 2017 at 12:24 PM, Andy Shevchenko
<[e-mail]> wrote:
> On Fri, 2017-05-05 at 10:06 +0300, Amir Goldstein wrote:
[...]
>> I think with this semantic change, our proposals can reach common
>> grounds
>> and satisfy a wider group of users (i.e. filesystem developers).
>>
>> Christoph also suggested a similar treatment to typedef guid_t to
>> struct uuid_le.
>> I don't know the use cases enough to comment on that.
>
> We may go this way. But I wouldn't prevent current users of uuid_le to
> continue using it without conversion (it may be done case by case after
> we settle an API)
>
> So, summarize what Christoph said it will look like
>
> typedef uuid_be uuid_t;
> typedef uuid_le guid_t
>
> uuid_cmp() / uuid_copy() / uuid_to_bin() / etc
> guid_cmp() / guid_copy() / guid_to_bin() / etc
>
> Correct? Christoph?
>

That looks right to me.

To complete the picture for folks not cc'ed on my patches,
xfs use case suggests there is also justification for the additional helpers:

uuid_is_null() / uuid_equal()
guid_is_null() / guid_equal()

Cheers,
Amir.

Christoph Hellwig May 5, 2017, 9:57 a.m. UTC | #12

On Fri, May 05, 2017 at 12:50:31PM +0300, Amir Goldstein wrote:
> To complete the picture for folks not cc'ed on my patches,
> xfs use case suggests there is also justification for the additional helpers:
> 
> uuid_is_null() / uuid_equal()
> guid_is_null() / guid_equal()

The is_null is useful and I bet we'll find other instances.  I'm
not sure _equals really adds much value over the existing _cmp
helpers, but on the other hand they are so trivial that we might as
well add them.

The other thing XFS has is uuid_copy.

Amir Goldstein May 5, 2017, 10:02 a.m. UTC | #13

On Fri, May 5, 2017 at 12:57 PM, Christoph Hellwig <[e-mail]> wrote:
> On Fri, May 05, 2017 at 12:50:31PM +0300, Amir Goldstein wrote:
>> To complete the picture for folks not cc'ed on my patches,
>> xfs use case suggests there is also justification for the additional helpers:
>>
>> uuid_is_null() / uuid_equal()
>> guid_is_null() / guid_equal()
>
> The is_null is useful and I bet we'll find other instances. I'm
> not sure _equals really adds much value over the existing _cmp
> helpers, but on the other hand they are so trivial that we might as
> well add them.

Exactly. The fact that not only xfs used the same helper name
(drivers/md/md.c) suggests that it useful.

>
> The other thing XFS has is uuid_copy.

Andy already listed uuid_copy.

Felipe Balbi May 9, 2017, 7:56 a.m. UTC | #14

Hi,

Andy Shevchenko <[e-mail]> writes:
> acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
> bytes. Instead we convert them to use uuid_le type. At the same time we
> convert current users.
>
> acpi_str_to_uuid() becomes useless after the conversion and it's safe to
> get rid of it.
>
> The conversion fixes a potential bug in int340x_thermal as well since
> we have to use memcmp() on binary data.
>
> Cc: Rafael J. Wysocki <[e-mail]>
> Cc: Mika Westerberg <[e-mail]>
> Cc: Borislav Petkov <[e-mail]>
> Cc: Dan Williams <[e-mail]>
> Cc: Amir Goldstein <[e-mail]>
> Cc: Jarkko Sakkinen <[e-mail]>
> Cc: Jani Nikula <[e-mail]>
> Cc: Ben Skeggs <[e-mail]>
> Cc: Benjamin Tissoires <[e-mail]>
> Cc: Joerg Roedel <[e-mail]>
> Cc: Adrian Hunter <[e-mail]>
> Cc: Yisen Zhuang <[e-mail]>
> Cc: Bjorn Helgaas <[e-mail]>
> Cc: Zhang Rui <[e-mail]>
> Cc: Felipe Balbi <[e-mail]>
> Cc: Mathias Nyman <[e-mail]>
> Cc: Heikki Krogerus <[e-mail]>
> Cc: Liam Girdwood <[e-mail]>
> Cc: Mark Brown <[e-mail]>
> Signed-off-by: Andy Shevchenko <[e-mail]>
> diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
> index a15ec71d0423..6b5284ec76df 100644
> --- a/drivers/usb/dwc3/dwc3-pci.c
> +++ b/drivers/usb/dwc3/dwc3-pci.c
> @@ -56,7 +56,7 @@ struct dwc3_pci {
>  	struct platform_device *dwc3;
>  	struct pci_dev *pci;
>  
> -	u8 uuid[16];
> +	uuid_le uuid;
>  
>  	unsigned int has_dsm_for_pm:1;
>  };
> @@ -118,7 +118,7 @@ static int dwc3_pci_quirks(struct dwc3_pci *dwc)
>  
>  		if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
>  				pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
> -			acpi_str_to_uuid(PCI_INTEL_BXT_DSM_UUID, dwc->uuid);
> +			uuid_le_to_bin(PCI_INTEL_BXT_DSM_UUID, &dwc->uuid);
>  			dwc->has_dsm_for_pm = true;
>  		}
>  
> @@ -288,7 +288,7 @@ static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
>  	tmp.type = ACPI_TYPE_INTEGER;
>  	tmp.integer.value = param;
>  
> -	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), dwc->uuid,
> +	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->uuid,
>  			1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
>  	if (!obj) {
>  		dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");

Acked-by: Felipe Balbi <[e-mail]>

Mathias Nyman May 9, 2017, 8:22 a.m. UTC | #15

> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index 7b86508ac8cf..93b4f0de9418 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -210,13 +210,12 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
>   #ifdef CONFIG_ACPI
>   static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
>   {
> -	static const u8 intel_dsm_uuid[] = {
> -		0xb7, 0x0c, 0x34, 0xac,	0x01, 0xe9, 0xbf, 0x45,
> -		0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23,
> -	};
> +	static const uuid_le intel_dsm_uuid =
> +		UUID_LE(0xac340cb7, 0xe901, 0x45bf,
> +			0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23);
>   	union acpi_object *obj;
>
> -	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), intel_dsm_uuid, 3, 1,
> +	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), &intel_dsm_uuid, 3, 1,
>   				NULL);
>   	ACPI_FREE(obj);
>   }

For the xhci part above:

Acked-by: Mathias Nyman <[e-mail]>

Zhang Rui May 10, 2017, 1:20 a.m. UTC | #16

On Thu, 2017-05-04 at 12:21 +0300, Andy Shevchenko wrote:
> acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
> bytes. Instead we convert them to use uuid_le type. At the same time
> we
> convert current users.
> 
> acpi_str_to_uuid() becomes useless after the conversion and it's safe
> to
> get rid of it.
> 
> The conversion fixes a potential bug in int340x_thermal as well since
> we have to use memcmp() on binary data.
> 
> Cc: Rafael J. Wysocki <[e-mail]>
> Cc: Mika Westerberg <[e-mail]>
> Cc: Borislav Petkov <[e-mail]>
> Cc: Dan Williams <[e-mail]>
> Cc: Amir Goldstein <[e-mail]>
> Cc: Jarkko Sakkinen <[e-mail]>
> Cc: Jani Nikula <[e-mail]>
> Cc: Ben Skeggs <[e-mail]>
> Cc: Benjamin Tissoires <[e-mail]>
> Cc: Joerg Roedel <[e-mail]>
> Cc: Adrian Hunter <[e-mail]>
> Cc: Yisen Zhuang <[e-mail]>
> Cc: Bjorn Helgaas <[e-mail]>
> Cc: Zhang Rui <[e-mail]>
> Cc: Felipe Balbi <[e-mail]>
> Cc: Mathias Nyman <[e-mail]>
> Cc: Heikki Krogerus <[e-mail]>
> Cc: Liam Girdwood <[e-mail]>
> Cc: Mark Brown <[e-mail]>
> Signed-off-by: Andy Shevchenko <[e-mail]>
> ---
> 
> diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c
> b/drivers/thermal/int340x_thermal/int3400_thermal.c
> index 9413c4abf0b9..c0eb3bb19b23 100644
> --- a/drivers/thermal/int340x_thermal/int3400_thermal.c
> +++ b/drivers/thermal/int340x_thermal/int3400_thermal.c
> @@ -23,7 +23,7 @@ enum int3400_thermal_uuid {
>  	INT3400_THERMAL_MAXIMUM_UUID,
>  };
>  
> -static u8 *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
> +static const char
> *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
>  	"42A441D6-AE6A-462b-A84B-4A8CE79027D3",
>  	"3A95C389-E4B8-4629-A526-C52C88626BAE",
>  	"97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
> @@ -141,10 +141,10 @@ static int int3400_thermal_get_uuids(struct
> int3400_thermal_priv *priv)
>  		}
>  
>  		for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
> -			u8 uuid[16];
> +			uuid_le u;
>  
> -			acpi_str_to_uuid(int3400_thermal_uuids[j],
> uuid);
> -			if (!strncmp(uuid, objb->buffer.pointer,
> 16)) {
> +			uuid_le_to_bin(int3400_thermal_uuids[j],
> &u);
> +			if (!uuid_le_cmp(*(uuid_le *)objb-
> >buffer.pointer), u) {
>  				priv->uuid_bitmap |= (1 << j);
>  				break;
>  			}
thanks for the fix.

Acked-by: Zhang Rui <[e-mail]>

-rui

Andy Shevchenko May 22, 2017, 7:08 p.m. UTC | #17

On Thu, 2017-05-04 at 12:21 +0300, Andy Shevchenko wrote:
> acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
> bytes. Instead we convert them to use uuid_le type. At the same time
> we
> convert current users.
> 
> acpi_str_to_uuid() becomes useless after the conversion and it's safe
> to
> get rid of it.
> 
> The conversion fixes a potential bug in int340x_thermal as well since
> we have to use memcmp() on binary data.
> 
> Cc: Rafael J. Wysocki <[e-mail]>
> Cc: Mika Westerberg <[e-mail]>
> Cc: Borislav Petkov <[e-mail]>
> Cc: Dan Williams <[e-mail]>
> Cc: Amir Goldstein <[e-mail]>
> Cc: Jarkko Sakkinen <[e-mail]>
> Cc: Jani Nikula <[e-mail]>
> Cc: Ben Skeggs <[e-mail]>
> Cc: Benjamin Tissoires <[e-mail]>
> Cc: Joerg Roedel <[e-mail]>
> Cc: Adrian Hunter <[e-mail]>
> Cc: Yisen Zhuang <[e-mail]>
> Cc: Bjorn Helgaas <[e-mail]>
> Cc: Zhang Rui <[e-mail]>
> Cc: Felipe Balbi <[e-mail]>
> Cc: Mathias Nyman <[e-mail]>
> Cc: Heikki Krogerus <[e-mail]>
> Cc: Liam Girdwood <[e-mail]>
> Cc: Mark Brown <[e-mail]>
> Signed-off-by: Andy Shevchenko <[e-mail]>

Thank you everyone who gave a tag to this.

I'm going to split and rebase on top of Christoph's branch
http://git.infradead.org/users/hch/vfs.git/shortlog/refs/heads/uuid-type
s

followed by changing types and API calls accordingly (without changing a
logic!).

So, I would like to keep tags in place. If there is any objection, speak
up now!
 
Thanks!

Patch

diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
index 502ea4dc2080..69d6140b6afa 100644
--- a/drivers/acpi/acpi_extlog.c
+++ b/drivers/acpi/acpi_extlog.c
@@ -182,17 +182,17 @@  static int extlog_print(struct notifier_block *nb, unsigned long val,
 
 static bool __init extlog_get_l1addr(void)
 {
-	u8 uuid[16];
+	uuid_le uuid;
 	acpi_handle handle;
 	union acpi_object *obj;
 
-	acpi_str_to_uuid(extlog_dsm_uuid, uuid);
-
+	if (uuid_le_to_bin(extlog_dsm_uuid, &uuid))
+		return false;
 	if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
 		return false;
-	if (!acpi_check_dsm(handle, uuid, EXTLOG_DSM_REV, 1 << EXTLOG_FN_ADDR))
+	if (!acpi_check_dsm(handle, &uuid, EXTLOG_DSM_REV, 1 << EXTLOG_FN_ADDR))
 		return false;
-	obj = acpi_evaluate_dsm_typed(handle, uuid, EXTLOG_DSM_REV,
+	obj = acpi_evaluate_dsm_typed(handle, &uuid, EXTLOG_DSM_REV,
 				      EXTLOG_FN_ADDR, NULL, ACPI_TYPE_INTEGER);
 	if (!obj) {
 		return false;
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 784bda663d16..e8130a4873e9 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -196,42 +196,19 @@  static void acpi_print_osc_error(acpi_handle handle,
 	pr_debug("\n");
 }
 
-acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
-{
-	int i;
-	static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
-		24, 26, 28, 30, 32, 34};
-
-	if (strlen(str) != 36)
-		return AE_BAD_PARAMETER;
-	for (i = 0; i < 36; i++) {
-		if (i == 8 || i == 13 || i == 18 || i == 23) {
-			if (str[i] != '-')
-				return AE_BAD_PARAMETER;
-		} else if (!isxdigit(str[i]))
-			return AE_BAD_PARAMETER;
-	}
-	for (i = 0; i < 16; i++) {
-		uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
-		uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
-	}
-	return AE_OK;
-}
-EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
-
 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
 {
 	acpi_status status;
 	struct acpi_object_list input;
 	union acpi_object in_params[4];
 	union acpi_object *out_obj;
-	u8 uuid[16];
+	uuid_le uuid;
 	u32 errors;
 	struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
 
 	if (!context)
 		return AE_ERROR;
-	if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
+	if (uuid_le_to_bin(context->uuid_str, &uuid))
 		return AE_ERROR;
 	context->ret.length = ACPI_ALLOCATE_BUFFER;
 	context->ret.pointer = NULL;
@@ -241,7 +218,7 @@  acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
 	input.pointer = in_params;
 	in_params[0].type 		= ACPI_TYPE_BUFFER;
 	in_params[0].buffer.length 	= 16;
-	in_params[0].buffer.pointer	= uuid;
+	in_params[0].buffer.pointer	= (u8 *)&uuid;
 	in_params[1].type 		= ACPI_TYPE_INTEGER;
 	in_params[1].integer.value 	= context->rev;
 	in_params[2].type 		= ACPI_TYPE_INTEGER;
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 0f7982a1caaf..bd3e45ede056 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -74,11 +74,11 @@  struct nfit_table_prev {
 	struct list_head flushes;
 };
 
-static u8 nfit_uuid[NFIT_UUID_MAX][16];
+static uuid_le nfit_uuid[NFIT_UUID_MAX];
 
-const u8 *to_nfit_uuid(enum nfit_uuids id)
+const uuid_le *to_nfit_uuid(enum nfit_uuids id)
 {
-	return nfit_uuid[id];
+	return &nfit_uuid[id];
 }
 EXPORT_SYMBOL(to_nfit_uuid);
 
@@ -207,7 +207,7 @@  int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
 	u32 offset, fw_status = 0;
 	acpi_handle handle;
 	unsigned int func;
-	const u8 *uuid;
+	const uuid_le *uuid;
 	int rc, i;
 
 	func = cmd;
@@ -394,7 +394,7 @@  int nfit_spa_type(struct acpi_nfit_system_address *spa)
 	int i;
 
 	for (i = 0; i < NFIT_UUID_MAX; i++)
-		if (memcmp(to_nfit_uuid(i), spa->range_guid, 16) == 0)
+		if (!uuid_le_cmp_pp(to_nfit_uuid(i), (uuid_le *)spa->range_guid))
 			return i;
 	return -1;
 }
@@ -1400,7 +1400,7 @@  static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
 	struct acpi_device *adev, *adev_dimm;
 	struct device *dev = acpi_desc->dev;
 	unsigned long dsm_mask;
-	const u8 *uuid;
+	const uuid_le *uuid = to_nfit_uuid(NFIT_DEV_DIMM);
 	int i;
 	int family = -1;
 
@@ -1596,7 +1596,7 @@  static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
 static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
 {
 	struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
-	const u8 *uuid = to_nfit_uuid(NFIT_DEV_BUS);
+	const uuid_le *uuid = to_nfit_uuid(NFIT_DEV_BUS);
 	struct acpi_device *adev;
 	int i;
 
@@ -3036,19 +3036,19 @@  static __init int nfit_init(void)
 	BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80);
 	BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40);
 
-	acpi_str_to_uuid(UUID_VOLATILE_MEMORY, nfit_uuid[NFIT_SPA_VOLATILE]);
-	acpi_str_to_uuid(UUID_PERSISTENT_MEMORY, nfit_uuid[NFIT_SPA_PM]);
-	acpi_str_to_uuid(UUID_CONTROL_REGION, nfit_uuid[NFIT_SPA_DCR]);
-	acpi_str_to_uuid(UUID_DATA_REGION, nfit_uuid[NFIT_SPA_BDW]);
-	acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_VDISK]);
-	acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_CD, nfit_uuid[NFIT_SPA_VCD]);
-	acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_PDISK]);
-	acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_CD, nfit_uuid[NFIT_SPA_PCD]);
-	acpi_str_to_uuid(UUID_NFIT_BUS, nfit_uuid[NFIT_DEV_BUS]);
-	acpi_str_to_uuid(UUID_NFIT_DIMM, nfit_uuid[NFIT_DEV_DIMM]);
-	acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE1, nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
-	acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE2, nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
-	acpi_str_to_uuid(UUID_NFIT_DIMM_N_MSFT, nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
+	uuid_le_to_bin(UUID_VOLATILE_MEMORY, &nfit_uuid[NFIT_SPA_VOLATILE]);
+	uuid_le_to_bin(UUID_PERSISTENT_MEMORY, &nfit_uuid[NFIT_SPA_PM]);
+	uuid_le_to_bin(UUID_CONTROL_REGION, &nfit_uuid[NFIT_SPA_DCR]);
+	uuid_le_to_bin(UUID_DATA_REGION, &nfit_uuid[NFIT_SPA_BDW]);
+	uuid_le_to_bin(UUID_VOLATILE_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_VDISK]);
+	uuid_le_to_bin(UUID_VOLATILE_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_VCD]);
+	uuid_le_to_bin(UUID_PERSISTENT_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_PDISK]);
+	uuid_le_to_bin(UUID_PERSISTENT_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_PCD]);
+	uuid_le_to_bin(UUID_NFIT_BUS, &nfit_uuid[NFIT_DEV_BUS]);
+	uuid_le_to_bin(UUID_NFIT_DIMM, &nfit_uuid[NFIT_DEV_DIMM]);
+	uuid_le_to_bin(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
+	uuid_le_to_bin(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
+	uuid_le_to_bin(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
 
 	nfit_wq = create_singlethread_workqueue("nfit");
 	if (!nfit_wq)
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
index 58fb7d68e04a..2f233b28709f 100644
--- a/drivers/acpi/nfit/nfit.h
+++ b/drivers/acpi/nfit/nfit.h
@@ -18,7 +18,6 @@ 
 #include <linux/libnvdimm.h>
 #include <linux/ndctl.h>
 #include <linux/types.h>
-#include <linux/uuid.h>
 #include <linux/acpi.h>
 #include <acpi/acuuid.h>
 
@@ -237,7 +236,7 @@  static inline struct acpi_nfit_desc *to_acpi_desc(
 	return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
 }
 
-const u8 *to_nfit_uuid(enum nfit_uuids id);
+const uuid_le *to_nfit_uuid(enum nfit_uuids id);
 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
 void acpi_nfit_shutdown(void *data);
 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 27d0dcfcf47d..bbe8a950e508 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -625,7 +625,7 @@  acpi_status acpi_evaluate_lck(acpi_handle handle, int lock)
  * some old BIOSes do expect a buffer or an integer etc.
  */
 union acpi_object *
-acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 func,
+acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 func,
 		  union acpi_object *argv4)
 {
 	acpi_status ret;
@@ -674,7 +674,7 @@  EXPORT_SYMBOL(acpi_evaluate_dsm);
  * functions. Currently only support 64 functions at maximum, should be
  * enough for now.
  */
-bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 funcs)
+bool acpi_check_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 funcs)
 {
 	int i;
 	u64 mask = 0;
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index b917b9d5f710..f789f7e5a17d 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -27,10 +27,9 @@ 
 
 #define ACPI_SIG_TPM2 "TPM2"
 
-static const u8 CRB_ACPI_START_UUID[] = {
-	/* 0000 */ 0xAB, 0x6C, 0xBF, 0x6B, 0x63, 0x54, 0x14, 0x47,
-	/* 0008 */ 0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4
-};
+static const uuid_le crb_acpi_start_uuid =
+	UUID_LE(0x6BBF6CAB, 0x5463, 0x4714,
+		0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4);
 
 enum crb_defaults {
 	CRB_ACPI_START_REVISION_ID = 1,
@@ -266,7 +265,7 @@  static int crb_do_acpi_start(struct tpm_chip *chip)
 	int rc;
 
 	obj = acpi_evaluate_dsm(chip->acpi_dev_handle,
-				CRB_ACPI_START_UUID,
+				&crb_acpi_start_uuid,
 				CRB_ACPI_START_REVISION_ID,
 				CRB_ACPI_START_INDEX,
 				NULL);
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 692a2c6ae036..7cf682426361 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -32,20 +32,16 @@ 
 #define PPI_VS_REQ_START	128
 #define PPI_VS_REQ_END		255
 
-static const u8 tpm_ppi_uuid[] = {
-	0xA6, 0xFA, 0xDD, 0x3D,
-	0x1B, 0x36,
-	0xB4, 0x4E,
-	0xA4, 0x24,
-	0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53
-};
+static const uuid_le tpm_ppi_uuid =
+	UUID_LE(0x3DDDFAA6, 0x361B, 0x4EB4,
+		0xA4, 0x24, 0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53);
 
 static inline union acpi_object *
 tpm_eval_dsm(acpi_handle ppi_handle, int func, acpi_object_type type,
 	     union acpi_object *argv4)
 {
 	BUG_ON(!ppi_handle);
-	return acpi_evaluate_dsm_typed(ppi_handle, tpm_ppi_uuid,
+	return acpi_evaluate_dsm_typed(ppi_handle, &tpm_ppi_uuid,
 				       TPM_PPI_REVISION_ID,
 				       func, argv4, type);
 }
@@ -107,7 +103,7 @@  static ssize_t tpm_store_ppi_request(struct device *dev,
 	 * is updated with function index from SUBREQ to SUBREQ2 since PPI
 	 * version 1.1
 	 */
-	if (acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
+	if (acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_uuid,
 			   TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_SUBREQ2))
 		func = TPM_PPI_FN_SUBREQ2;
 
@@ -268,7 +264,7 @@  static ssize_t show_ppi_operations(acpi_handle dev_handle, char *buf, u32 start,
 		"User not required",
 	};
 
-	if (!acpi_check_dsm(dev_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
+	if (!acpi_check_dsm(dev_handle, &tpm_ppi_uuid, TPM_PPI_REVISION_ID,
 			    1 << TPM_PPI_FN_GETOPR))
 		return -EPERM;
 
@@ -341,12 +337,12 @@  void tpm_add_ppi(struct tpm_chip *chip)
 	if (!chip->acpi_dev_handle)
 		return;
 
-	if (!acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
+	if (!acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_uuid,
 			    TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_VERSION))
 		return;
 
 	/* Cache PPI version string. */
-	obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, tpm_ppi_uuid,
+	obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, &tpm_ppi_uuid,
 				      TPM_PPI_REVISION_ID, TPM_PPI_FN_VERSION,
 				      NULL, ACPI_TYPE_STRING);
 	if (obj) {
diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
index eb638a1e69d2..72bfe6ceadf8 100644
--- a/drivers/gpu/drm/i915/intel_acpi.c
+++ b/drivers/gpu/drm/i915/intel_acpi.c
@@ -15,13 +15,9 @@  static struct intel_dsm_priv {
 	acpi_handle dhandle;
 } intel_dsm_priv;
 
-static const u8 intel_dsm_guid[] = {
-	0xd3, 0x73, 0xd8, 0x7e,
-	0xd0, 0xc2,
-	0x4f, 0x4e,
-	0xa8, 0x54,
-	0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c
-};
+static const uuid_le intel_dsm_guid =
+	UUID_LE(0x7ed873d3, 0xc2d0, 0x4e4f,
+		0xa8, 0x54, 0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c);
 
 static char *intel_dsm_port_name(u8 id)
 {
@@ -80,7 +76,7 @@  static void intel_dsm_platform_mux_info(void)
 	int i;
 	union acpi_object *pkg, *connector_count;
 
-	pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, intel_dsm_guid,
+	pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, &intel_dsm_guid,
 			INTEL_DSM_REVISION_ID, INTEL_DSM_FN_PLATFORM_MUX_INFO,
 			NULL, ACPI_TYPE_PACKAGE);
 	if (!pkg) {
@@ -118,7 +114,7 @@  static bool intel_dsm_pci_probe(struct pci_dev *pdev)
 	if (!dhandle)
 		return false;
 
-	if (!acpi_check_dsm(dhandle, intel_dsm_guid, INTEL_DSM_REVISION_ID,
+	if (!acpi_check_dsm(dhandle, &intel_dsm_guid, INTEL_DSM_REVISION_ID,
 			    1 << INTEL_DSM_FN_PLATFORM_MUX_INFO)) {
 		DRM_DEBUG_KMS("no _DSM method for intel device\n");
 		return false;
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index 39468c218027..faea23276d4a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -60,15 +60,13 @@  bool nouveau_is_v1_dsm(void) {
 }
 
 #ifdef CONFIG_VGA_SWITCHEROO
-static const char nouveau_dsm_muid[] = {
-	0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
-	0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
-};
+static const uuid_le nouveau_dsm_muid =
+	UUID_LE(0x9D95A0A0, 0x0060, 0x4D48,
+		0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4);
 
-static const char nouveau_op_dsm_muid[] = {
-	0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47,
-	0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0,
-};
+static const uuid_le nouveau_op_dsm_muid =
+	UUID_LE(0xA486D8F8, 0x0BDA, 0x471B,
+		0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0);
 
 static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
 {
@@ -86,7 +84,7 @@  static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *
 		args_buff[i] = (arg >> i * 8) & 0xFF;
 
 	*result = 0;
-	obj = acpi_evaluate_dsm_typed(handle, nouveau_op_dsm_muid, 0x00000100,
+	obj = acpi_evaluate_dsm_typed(handle, &nouveau_op_dsm_muid, 0x00000100,
 				      func, &argv4, ACPI_TYPE_BUFFER);
 	if (!obj) {
 		acpi_handle_info(handle, "failed to evaluate _DSM\n");
@@ -138,7 +136,7 @@  static int nouveau_dsm(acpi_handle handle, int func, int arg)
 		.integer.value = arg,
 	};
 
-	obj = acpi_evaluate_dsm_typed(handle, nouveau_dsm_muid, 0x00000102,
+	obj = acpi_evaluate_dsm_typed(handle, &nouveau_dsm_muid, 0x00000102,
 				      func, &argv4, ACPI_TYPE_INTEGER);
 	if (!obj) {
 		acpi_handle_info(handle, "failed to evaluate _DSM\n");
@@ -259,7 +257,7 @@  static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out
 	if (!acpi_has_method(dhandle, "_DSM"))
 		return;
 
-	supports_mux = acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102,
+	supports_mux = acpi_check_dsm(dhandle, &nouveau_dsm_muid, 0x00000102,
 				      1 << NOUVEAU_DSM_POWER);
 	optimus_funcs = nouveau_dsm_get_optimus_functions(dhandle);
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
index e3e2f5e83815..cc95b8150a86 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
@@ -81,10 +81,9 @@  mxm_shadow_dsm(struct nvkm_mxm *mxm, u8 version)
 {
 	struct nvkm_subdev *subdev = &mxm->subdev;
 	struct nvkm_device *device = subdev->device;
-	static char muid[] = {
-		0x00, 0xA4, 0x04, 0x40, 0x7D, 0x91, 0xF2, 0x4C,
-		0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65
-	};
+	static uuid_le muid =
+		UUID_LE(0x4004A400, 0x917D, 0x4CF2,
+			0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65);
 	u32 mxms_args[] = { 0x00000000 };
 	union acpi_object argv4 = {
 		.buffer.type = ACPI_TYPE_BUFFER,
@@ -105,7 +104,7 @@  mxm_shadow_dsm(struct nvkm_mxm *mxm, u8 version)
 	 * unless you pass in exactly the version it supports..
 	 */
 	rev = (version & 0xf0) << 4 | (version & 0x0f);
-	obj = acpi_evaluate_dsm(handle, muid, rev, 0x00000010, &argv4);
+	obj = acpi_evaluate_dsm(handle, &muid, rev, 0x00000010, &argv4);
 	if (!obj) {
 		nvkm_debug(subdev, "DSM MXMS failed\n");
 		return false;
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index 8daa8ce64ebb..f83bd717cdd5 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -872,10 +872,9 @@  static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
 static int i2c_hid_acpi_pdata(struct i2c_client *client,
 		struct i2c_hid_platform_data *pdata)
 {
-	static u8 i2c_hid_guid[] = {
-		0xF7, 0xF6, 0xDF, 0x3C, 0x67, 0x42, 0x55, 0x45,
-		0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE,
-	};
+	static uuid_le i2c_hid_guid =
+		UUID_LE(0x3CDFF6F7, 0x4267, 0x4555,
+			0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
 	union acpi_object *obj;
 	struct acpi_device *adev;
 	acpi_handle handle;
@@ -884,7 +883,7 @@  static int i2c_hid_acpi_pdata(struct i2c_client *client,
 	if (!handle || acpi_bus_get_device(handle, &adev))
 		return -ENODEV;
 
-	obj = acpi_evaluate_dsm_typed(handle, i2c_hid_guid, 1, 1, NULL,
+	obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL,
 				      ACPI_TYPE_INTEGER);
 	if (!obj) {
 		dev_err(&client->dev, "device _DSM execution failed\n");
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index cbf7763d8091..420d51b286ad 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1808,10 +1808,9 @@  IOMMU_INIT_POST(detect_intel_iommu);
  * for Directed-IO Architecture Specifiction, Rev 2.2, Section 8.8
  * "Remapping Hardware Unit Hot Plug".
  */
-static u8 dmar_hp_uuid[] = {
-	/* 0000 */    0xA6, 0xA3, 0xC1, 0xD8, 0x9B, 0xBE, 0x9B, 0x4C,
-	/* 0008 */    0x91, 0xBF, 0xC3, 0xCB, 0x81, 0xFC, 0x5D, 0xAF
-};
+static uuid_le dmar_hp_uuid =
+	UUID_LE(0xD8C1A3A6, 0xBE9B, 0x4C9B,
+		0x91, 0xBF, 0xC3, 0xCB, 0x81, 0xFC, 0x5D, 0xAF);
 
 /*
  * Currently there's only one revision and BIOS will not check the revision id,
@@ -1824,7 +1823,7 @@  static u8 dmar_hp_uuid[] = {
 
 static inline bool dmar_detect_dsm(acpi_handle handle, int func)
 {
-	return acpi_check_dsm(handle, dmar_hp_uuid, DMAR_DSM_REV_ID, 1 << func);
+	return acpi_check_dsm(handle, &dmar_hp_uuid, DMAR_DSM_REV_ID, 1 << func);
 }
 
 static int dmar_walk_dsm_resource(acpi_handle handle, int func,
@@ -1843,7 +1842,7 @@  static int dmar_walk_dsm_resource(acpi_handle handle, int func,
 	if (!dmar_detect_dsm(handle, func))
 		return 0;
 
-	obj = acpi_evaluate_dsm_typed(handle, dmar_hp_uuid, DMAR_DSM_REV_ID,
+	obj = acpi_evaluate_dsm_typed(handle, &dmar_hp_uuid, DMAR_DSM_REV_ID,
 				      func, NULL, ACPI_TYPE_BUFFER);
 	if (!obj)
 		return -ENODEV;
diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 92fc3f7c538d..262b8c320d7c 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -404,10 +404,9 @@  struct intel_host {
 	bool	d3_retune;
 };
 
-const u8 intel_dsm_uuid[] = {
-	0xA5, 0x3E, 0xC1, 0xF6, 0xCD, 0x65, 0x1F, 0x46,
-	0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61,
-};
+const uuid_le intel_dsm_uuid =
+	UUID_LE(0xF6C13EA5, 0x65CD, 0x461F,
+		0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
 
 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 		       unsigned int fn, u32 *result)
@@ -416,7 +415,7 @@  static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 	int err = 0;
 	size_t len;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), intel_dsm_uuid, 0, fn, NULL);
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_uuid, 0, fn, NULL);
 	if (!obj)
 		return -EOPNOTSUPP;
 
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
index e13aa064a8e9..02842fe7f1d0 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
@@ -29,10 +29,9 @@  enum _dsm_rst_type {
 	HNS_ROCE_RESET_FUNC     = 0x7,
 };
 
-const u8 hns_dsaf_acpi_dsm_uuid[] = {
-	0x1A, 0xAA, 0x85, 0x1A, 0x93, 0xE2, 0x5E, 0x41,
-	0x8E, 0x28, 0x8D, 0x69, 0x0A, 0x0F, 0x82, 0x0A
-};
+const uuid_le hns_dsaf_acpi_dsm_uuid =
+	UUID_LE(0x1A85AA1A, 0xE293, 0x415E,
+		0x8E, 0x28, 0x8D, 0x69, 0x0A, 0x0F, 0x82, 0x0A);
 
 static void dsaf_write_sub(struct dsaf_device *dsaf_dev, u32 reg, u32 val)
 {
@@ -151,7 +150,7 @@  static void hns_dsaf_acpi_srst_by_port(struct dsaf_device *dsaf_dev, u8 op_type,
 	argv4.package.elements = obj_args;
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(dsaf_dev->dev),
-				hns_dsaf_acpi_dsm_uuid, 0, op_type, &argv4);
+				&hns_dsaf_acpi_dsm_uuid, 0, op_type, &argv4);
 	if (!obj) {
 		dev_warn(dsaf_dev->dev, "reset port_type%d port%d fail!",
 			 port_type, port);
@@ -434,7 +433,7 @@  static phy_interface_t hns_mac_get_phy_if_acpi(struct hns_mac_cb *mac_cb)
 	argv4.package.elements = &obj_args,
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dev),
-				hns_dsaf_acpi_dsm_uuid, 0,
+				&hns_dsaf_acpi_dsm_uuid, 0,
 				HNS_OP_GET_PORT_TYPE_FUNC, &argv4);
 
 	if (!obj || obj->type != ACPI_TYPE_INTEGER)
@@ -474,7 +473,7 @@  int hns_mac_get_sfp_prsnt_acpi(struct hns_mac_cb *mac_cb, int *sfp_prsnt)
 	argv4.package.elements = &obj_args,
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dev),
-				hns_dsaf_acpi_dsm_uuid, 0,
+				&hns_dsaf_acpi_dsm_uuid, 0,
 				HNS_OP_GET_SFP_STAT_FUNC, &argv4);
 
 	if (!obj || obj->type != ACPI_TYPE_INTEGER)
@@ -565,7 +564,7 @@  hns_mac_config_sds_loopback_acpi(struct hns_mac_cb *mac_cb, bool en)
 	argv4.package.elements = obj_args;
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dsaf_dev->dev),
-				hns_dsaf_acpi_dsm_uuid, 0,
+				&hns_dsaf_acpi_dsm_uuid, 0,
 				HNS_OP_SERDES_LP_FUNC, &argv4);
 	if (!obj) {
 		dev_warn(mac_cb->dsaf_dev->dev, "set port%d serdes lp fail!",
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 001860361434..eb612123e0dd 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -24,10 +24,9 @@ 
  * The UUID is defined in the PCI Firmware Specification available here:
  * https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf
  */
-const u8 pci_acpi_dsm_uuid[] = {
-	0xd0, 0x37, 0xc9, 0xe5, 0x53, 0x35, 0x7a, 0x4d,
-	0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d
-};
+const uuid_le pci_acpi_dsm_uuid =
+	UUID_LE(0xe5c937d0, 0x3553, 0x4d7a,
+		0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d);
 
 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
 static int acpi_get_rc_addr(struct acpi_device *adev, struct resource *res)
@@ -680,7 +679,7 @@  void acpi_pci_add_bus(struct pci_bus *bus)
 	if (!pci_is_root_bus(bus))
 		return;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), pci_acpi_dsm_uuid, 3,
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_uuid, 3,
 				RESET_DELAY_DSM, NULL);
 	if (!obj)
 		return;
@@ -745,7 +744,7 @@  static void pci_acpi_optimize_delay(struct pci_dev *pdev,
 	if (bridge->ignore_reset_delay)
 		pdev->d3cold_delay = 0;
 
-	obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 3,
+	obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_uuid, 3,
 				FUNCTION_DELAY_DSM, NULL);
 	if (!obj)
 		return;
diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index 51357377efbc..a2c04229f1dc 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -172,7 +172,7 @@  static int dsm_get_label(struct device *dev, char *buf,
 	if (!handle)
 		return -1;
 
-	obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 0x2,
+	obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_uuid, 0x2,
 				DEVICE_LABEL_DSM, NULL);
 	if (!obj)
 		return -1;
@@ -212,7 +212,7 @@  static bool device_has_dsm(struct device *dev)
 	if (!handle)
 		return false;
 
-	return !!acpi_check_dsm(handle, pci_acpi_dsm_uuid, 0x2,
+	return !!acpi_check_dsm(handle, &pci_acpi_dsm_uuid, 0x2,
 				1 << DEVICE_LABEL_DSM);
 }
 
diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c b/drivers/thermal/int340x_thermal/int3400_thermal.c
index 9413c4abf0b9..c0eb3bb19b23 100644
--- a/drivers/thermal/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/int340x_thermal/int3400_thermal.c
@@ -23,7 +23,7 @@  enum int3400_thermal_uuid {
 	INT3400_THERMAL_MAXIMUM_UUID,
 };
 
-static u8 *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
+static const char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
 	"42A441D6-AE6A-462b-A84B-4A8CE79027D3",
 	"3A95C389-E4B8-4629-A526-C52C88626BAE",
 	"97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
@@ -141,10 +141,10 @@  static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
 		}
 
 		for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
-			u8 uuid[16];
+			uuid_le u;
 
-			acpi_str_to_uuid(int3400_thermal_uuids[j], uuid);
-			if (!strncmp(uuid, objb->buffer.pointer, 16)) {
+			uuid_le_to_bin(int3400_thermal_uuids[j], &u);
+			if (!uuid_le_cmp(*(uuid_le *)objb->buffer.pointer), u) {
 				priv->uuid_bitmap |= (1 << j);
 				break;
 			}
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index a15ec71d0423..6b5284ec76df 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -56,7 +56,7 @@  struct dwc3_pci {
 	struct platform_device *dwc3;
 	struct pci_dev *pci;
 
-	u8 uuid[16];
+	uuid_le uuid;
 
 	unsigned int has_dsm_for_pm:1;
 };
@@ -118,7 +118,7 @@  static int dwc3_pci_quirks(struct dwc3_pci *dwc)
 
 		if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
 				pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
-			acpi_str_to_uuid(PCI_INTEL_BXT_DSM_UUID, dwc->uuid);
+			uuid_le_to_bin(PCI_INTEL_BXT_DSM_UUID, &dwc->uuid);
 			dwc->has_dsm_for_pm = true;
 		}
 
@@ -288,7 +288,7 @@  static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
 	tmp.type = ACPI_TYPE_INTEGER;
 	tmp.integer.value = param;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), dwc->uuid,
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->uuid,
 			1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
 	if (!obj) {
 		dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 7b86508ac8cf..93b4f0de9418 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -210,13 +210,12 @@  static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 #ifdef CONFIG_ACPI
 static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
 {
-	static const u8 intel_dsm_uuid[] = {
-		0xb7, 0x0c, 0x34, 0xac,	0x01, 0xe9, 0xbf, 0x45,
-		0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23,
-	};
+	static const uuid_le intel_dsm_uuid =
+		UUID_LE(0xac340cb7, 0xe901, 0x45bf,
+			0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23);
 	union acpi_object *obj;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), intel_dsm_uuid, 3, 1,
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), &intel_dsm_uuid, 3, 1,
 				NULL);
 	ACPI_FREE(obj);
 }
diff --git a/drivers/usb/misc/ucsi.c b/drivers/usb/misc/ucsi.c
index 07397bddefa3..49e32ffbe59f 100644
--- a/drivers/usb/misc/ucsi.c
+++ b/drivers/usb/misc/ucsi.c
@@ -61,7 +61,7 @@  static int ucsi_acpi_cmd(struct ucsi *ucsi, struct ucsi_control *ctrl)
 
 	ucsi->data->ctrl.raw_cmd = ctrl->raw_cmd;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(ucsi->dev), uuid.b, 1, 1, NULL);
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(ucsi->dev), &uuid, 1, 1, NULL);
 	if (!obj) {
 		dev_err(ucsi->dev, "%s: failed to evaluate _DSM\n", __func__);
 		return -EIO;
diff --git a/drivers/usb/typec/typec_wcove.c b/drivers/usb/typec/typec_wcove.c
index d5a7b21fa3f1..5ce93e0a15ca 100644
--- a/drivers/usb/typec/typec_wcove.c
+++ b/drivers/usb/typec/typec_wcove.c
@@ -118,7 +118,7 @@  static int wcove_typec_func(struct wcove_typec *wcove,
 	tmp.type = ACPI_TYPE_INTEGER;
 	tmp.integer.value = param;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), uuid.b, 1, func,
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), &uuid, 1, func,
 				&argv4);
 	if (!obj) {
 		dev_err(wcove->dev, "%s: failed to evaluate _DSM\n", __func__);
@@ -314,7 +314,7 @@  static int wcove_typec_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), uuid.b, 0, 0x1f)) {
+	if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), &uuid, 0, 0x1f)) {
 		dev_err(&pdev->dev, "Missing _DSM functions\n");
 		return -ENODEV;
 	}
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 197f3fffc9a7..0682942d6a76 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -61,13 +61,14 @@  bool acpi_ata_match(acpi_handle handle);
 bool acpi_bay_match(acpi_handle handle);
 bool acpi_dock_match(acpi_handle handle);
 
-bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 funcs);
-union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
+bool acpi_check_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 funcs);
+union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid,
 			u64 rev, u64 func, union acpi_object *argv4);
 
 static inline union acpi_object *
-acpi_evaluate_dsm_typed(acpi_handle handle, const u8 *uuid, u64 rev, u64 func,
-			union acpi_object *argv4, acpi_object_type type)
+acpi_evaluate_dsm_typed(acpi_handle handle, const uuid_le *uuid, u64 rev,
+			u64 func, union acpi_object *argv4,
+			acpi_object_type type)
 {
 	union acpi_object *obj;
 
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 137e4a3d89c5..66d135003780 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -39,6 +39,7 @@ 
 #include <linux/dynamic_debug.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/uuid.h>
 
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
@@ -457,7 +458,6 @@  struct acpi_osc_context {
 	struct acpi_buffer ret;		/* free by caller if success */
 };
 
-acpi_status acpi_str_to_uuid(char *str, u8 *uuid);
 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
 
 /* Indexes into _OSC Capabilities Buffer (DWORDs 2 & 3 are device-specific) */
@@ -741,7 +741,7 @@  static inline bool acpi_driver_match_device(struct device *dev,
 }
 
 static inline union acpi_object *acpi_evaluate_dsm(acpi_handle handle,
-						   const u8 *uuid,
+						   const uuid_le *uuid,
 						   int rev, int func,
 						   union acpi_object *argv4)
 {
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 7a4e83a8c89c..917a6ad0f24d 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -105,7 +105,7 @@  static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
 static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
 #endif
 
-extern const u8 pci_acpi_dsm_uuid[];
+extern const uuid_le pci_acpi_dsm_uuid;
 #define DEVICE_LABEL_DSM	0x07
 #define RESET_DELAY_DSM		0x08
 #define FUNCTION_DELAY_DSM	0x09
diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c
index e3f06672fd6d..b95f659dced5 100644
--- a/sound/soc/intel/skylake/skl-nhlt.c
+++ b/sound/soc/intel/skylake/skl-nhlt.c
@@ -21,8 +21,9 @@ 
 #include "skl.h"
 
 /* Unique identification for getting NHLT blobs */
-static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45,
-				0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53};
+static uuid_le osc_uuid =
+	UUID_LE(0xA69F886E, 0x6CEB, 0x4594,
+		0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
 
 struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
 {
@@ -37,7 +38,7 @@  struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
 		return NULL;
 	}
 
-	obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL);
+	obj = acpi_evaluate_dsm(handle, &osc_uuid, 1, 1, NULL);
 	if (obj && obj->type == ACPI_TYPE_BUFFER) {
 		nhlt_ptr = (struct nhlt_resource_desc  *)obj->buffer.pointer;
 		nhlt_table = (struct nhlt_acpi_table *)
diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
index 64cae1a5deff..f190f22c53dd 100644
--- a/tools/testing/nvdimm/test/iomap.c
+++ b/tools/testing/nvdimm/test/iomap.c
@@ -370,7 +370,7 @@  acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,
 }
 EXPORT_SYMBOL(__wrap_acpi_evaluate_object);
 
-union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
+union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid,
 		u64 rev, u64 func, union acpi_object *argv4)
 {
 	union acpi_object *obj = ERR_PTR(-ENXIO);
diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index c2187178fb13..145f6ee0234f 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -1559,7 +1559,7 @@  static unsigned long nfit_ctl_handle;
 union acpi_object *result;
 
 static union acpi_object *nfit_test_evaluate_dsm(acpi_handle handle,
-		const u8 *uuid, u64 rev, u64 func, union acpi_object *argv4)
+		const uuid_le *uuid, u64 rev, u64 func, union acpi_object *argv4)
 {
 	if (handle != &nfit_ctl_handle)
 		return ERR_PTR(-ENXIO);