| Message ID | 20230507234618.18067-3-kirill.shutemov@linux.intel.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mm, x86/cc: Implement support for unaccepted memory | expand |
On Mon, 8 May 2023 at 01:46, Kirill A. Shutemov <kirill.shutemov@linux.intel.com> wrote: > > Currently allocate_e820() is only interested in the size of map and size > of memory descriptor to determine how many e820 entries the kernel > needs. > > UEFI Specification version 2.9 introduces a new memory type -- > unaccepted memory. To track unaccepted memory kernel needs to allocate > a bitmap. The size of the bitmap is dependent on the maximum physical > address present in the system. A full memory map is required to find > the maximum address. > > Modify allocate_e820() to get a full memory map. > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> > Reviewed-by: Borislav Petkov <bp@suse.de> Acked-by: Ard Biesheuvel <ardb@kernel.org> > --- > drivers/firmware/efi/libstub/x86-stub.c | 26 +++++++++++-------------- > 1 file changed, 11 insertions(+), 15 deletions(-) > > diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c > index a0bfd31358ba..fff81843169c 100644 > --- a/drivers/firmware/efi/libstub/x86-stub.c > +++ b/drivers/firmware/efi/libstub/x86-stub.c > @@ -681,28 +681,24 @@ static efi_status_t allocate_e820(struct boot_params *params, > struct setup_data **e820ext, > u32 *e820ext_size) > { > - unsigned long map_size, desc_size, map_key; > + struct efi_boot_memmap *map; > efi_status_t status; > - __u32 nr_desc, desc_version; > + __u32 nr_desc; > > - /* Only need the size of the mem map and size of each mem descriptor */ > - map_size = 0; > - status = efi_bs_call(get_memory_map, &map_size, NULL, &map_key, > - &desc_size, &desc_version); > - if (status != EFI_BUFFER_TOO_SMALL) > - return (status != EFI_SUCCESS) ? status : EFI_UNSUPPORTED; > + status = efi_get_memory_map(&map, false); > + if (status != EFI_SUCCESS) > + return status; > > - nr_desc = map_size / desc_size + EFI_MMAP_NR_SLACK_SLOTS; > - > - if (nr_desc > ARRAY_SIZE(params->e820_table)) { > - u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table); > + nr_desc = map->map_size / map->desc_size; > + if (nr_desc > ARRAY_SIZE(params->e820_table) - EFI_MMAP_NR_SLACK_SLOTS) { > + u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table) + > + EFI_MMAP_NR_SLACK_SLOTS; > > status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size); > - if (status != EFI_SUCCESS) > - return status; > } > > - return EFI_SUCCESS; > + efi_bs_call(free_pool, map); > + return status; > } > > struct exit_boot_struct { > -- > 2.39.3 >
diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c index a0bfd31358ba..fff81843169c 100644 --- a/drivers/firmware/efi/libstub/x86-stub.c +++ b/drivers/firmware/efi/libstub/x86-stub.c @@ -681,28 +681,24 @@ static efi_status_t allocate_e820(struct boot_params *params, struct setup_data **e820ext, u32 *e820ext_size) { - unsigned long map_size, desc_size, map_key; + struct efi_boot_memmap *map; efi_status_t status; - __u32 nr_desc, desc_version; + __u32 nr_desc; - /* Only need the size of the mem map and size of each mem descriptor */ - map_size = 0; - status = efi_bs_call(get_memory_map, &map_size, NULL, &map_key, - &desc_size, &desc_version); - if (status != EFI_BUFFER_TOO_SMALL) - return (status != EFI_SUCCESS) ? status : EFI_UNSUPPORTED; + status = efi_get_memory_map(&map, false); + if (status != EFI_SUCCESS) + return status; - nr_desc = map_size / desc_size + EFI_MMAP_NR_SLACK_SLOTS; - - if (nr_desc > ARRAY_SIZE(params->e820_table)) { - u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table); + nr_desc = map->map_size / map->desc_size; + if (nr_desc > ARRAY_SIZE(params->e820_table) - EFI_MMAP_NR_SLACK_SLOTS) { + u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table) + + EFI_MMAP_NR_SLACK_SLOTS; status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size); - if (status != EFI_SUCCESS) - return status; } - return EFI_SUCCESS; + efi_bs_call(free_pool, map); + return status; } struct exit_boot_struct {