| Message ID | 20220304154032.2071585-3-ani@anisinha.ca (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | hw/acpi: add indication for i8042 in IA-PC boot flags of the FADT table | expand |
On Fri, Mar 04, 2022 at 09:10:30PM +0530, Ani Sinha wrote: > From: Liav Albani <liavalb@gmail.com> > > This can allow the guest OS to determine more easily if i8042 controller > is present in the system or not, so it doesn't need to do probing of the > controller, but just initialize it immediately, before enumerating the > ACPI AML namespace. > > The 8042 bit in IAPC_BOOT_ARCH was introduced from ACPI spec v2 (FADT > revision 2 and above). Therefore, in this change, we only enable this bit for > x86/q35 machine types since x86/i440fx machines use FADT ACPI table with > revision 1. > > Signed-off-by: Liav Albani <liavalb@gmail.com> > Signed-off-by: Ani Sinha <ani@anisinha.ca> > --- > hw/acpi/aml-build.c | 8 +++++++- > hw/i386/acpi-build.c | 8 ++++++++ > include/hw/acpi/acpi-defs.h | 1 + > include/hw/input/i8042.h | 15 +++++++++++++++ > 4 files changed, 31 insertions(+), 1 deletion(-) > > diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c > index 8966e16320..1773cf55f1 100644 > --- a/hw/acpi/aml-build.c > +++ b/hw/acpi/aml-build.c > @@ -2152,7 +2152,13 @@ void build_fadt(GArray *tbl, BIOSLinker *linker, const AcpiFadtData *f, > build_append_int_noprefix(tbl, 0, 1); /* DAY_ALRM */ > build_append_int_noprefix(tbl, 0, 1); /* MON_ALRM */ > build_append_int_noprefix(tbl, f->rtc_century, 1); /* CENTURY */ > - build_append_int_noprefix(tbl, 0, 2); /* IAPC_BOOT_ARCH */ > + /* IAPC_BOOT_ARCH */ > + if (f->rev == 1) { > + build_append_int_noprefix(tbl, 0, 2); > + } else { > + /* since ACPI v2.0 */ > + build_append_int_noprefix(tbl, f->iapc_boot_arch, 2); > + } > build_append_int_noprefix(tbl, 0, 1); /* Reserved */ > build_append_int_noprefix(tbl, f->flags, 4); /* Flags */ > > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c > index ebd47aa26f..4ad4d7286c 100644 > --- a/hw/i386/acpi-build.c > +++ b/hw/i386/acpi-build.c > @@ -38,6 +38,7 @@ > #include "hw/nvram/fw_cfg.h" > #include "hw/acpi/bios-linker-loader.h" > #include "hw/isa/isa.h" > +#include "hw/input/i8042.h" > #include "hw/block/fdc.h" > #include "hw/acpi/memory_hotplug.h" > #include "sysemu/tpm.h" > @@ -192,6 +193,13 @@ static void init_common_fadt_data(MachineState *ms, Object *o, > .address = object_property_get_uint(o, ACPI_PM_PROP_GPE0_BLK, NULL) > }, > }; > + > + /* > + * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture > + * Flags, bit offset 1 - 8042. > + */ I think we should drop this comment (and one for microvm). If you like, add /* Table 5-8 Fixed ACPI Description Table (FADT) Format IAPC_BOOT_ARCH */ instead. Let's do that with a patch on top, we have a soft freeze to consider. > + fadt.iapc_boot_arch = iapc_boot_arch_8042(); > + > *data = fadt; > } > > diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h > index c97e8633ad..2b42e4192b 100644 > --- a/include/hw/acpi/acpi-defs.h > +++ b/include/hw/acpi/acpi-defs.h > @@ -77,6 +77,7 @@ typedef struct AcpiFadtData { > uint16_t plvl2_lat; /* P_LVL2_LAT */ > uint16_t plvl3_lat; /* P_LVL3_LAT */ > uint16_t arm_boot_arch; /* ARM_BOOT_ARCH */ > + uint16_t iapc_boot_arch; /* IAPC_BOOT_ARCH */ > uint8_t minor_ver; /* FADT Minor Version */ > > /* > diff --git a/include/hw/input/i8042.h b/include/hw/input/i8042.h > index 1d90432dae..e070f546e4 100644 > --- a/include/hw/input/i8042.h > +++ b/include/hw/input/i8042.h > @@ -23,4 +23,19 @@ void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq, > void i8042_isa_mouse_fake_event(ISAKBDState *isa); > void i8042_setup_a20_line(ISADevice *dev, qemu_irq a20_out); > > +static inline bool i8042_present(void) > +{ > + bool amb = false; > + return object_resolve_path_type("", TYPE_I8042, &amb) || amb; > +} > + > +/* > + * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture > + * Flags, bit offset 1 - 8042. > + */ > +static inline uint16_t iapc_boot_arch_8042(void) > +{ > + return i8042_present() ? 0x1 << 1 : 0x0 ; > +} > + > #endif /* HW_INPUT_I8042_H */ > -- > 2.25.1
On Sun, Mar 6, 2022 at 4:06 PM Michael S. Tsirkin <mst@redhat.com> wrote: > > On Fri, Mar 04, 2022 at 09:10:30PM +0530, Ani Sinha wrote: > > From: Liav Albani <liavalb@gmail.com> > > > > This can allow the guest OS to determine more easily if i8042 controller > > is present in the system or not, so it doesn't need to do probing of the > > controller, but just initialize it immediately, before enumerating the > > ACPI AML namespace. > > > > The 8042 bit in IAPC_BOOT_ARCH was introduced from ACPI spec v2 (FADT > > revision 2 and above). Therefore, in this change, we only enable this bit for > > x86/q35 machine types since x86/i440fx machines use FADT ACPI table with > > revision 1. > > > > Signed-off-by: Liav Albani <liavalb@gmail.com> > > Signed-off-by: Ani Sinha <ani@anisinha.ca> > > --- > > hw/acpi/aml-build.c | 8 +++++++- > > hw/i386/acpi-build.c | 8 ++++++++ > > include/hw/acpi/acpi-defs.h | 1 + > > include/hw/input/i8042.h | 15 +++++++++++++++ > > 4 files changed, 31 insertions(+), 1 deletion(-) > > > > diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c > > index 8966e16320..1773cf55f1 100644 > > --- a/hw/acpi/aml-build.c > > +++ b/hw/acpi/aml-build.c > > @@ -2152,7 +2152,13 @@ void build_fadt(GArray *tbl, BIOSLinker *linker, const AcpiFadtData *f, > > build_append_int_noprefix(tbl, 0, 1); /* DAY_ALRM */ > > build_append_int_noprefix(tbl, 0, 1); /* MON_ALRM */ > > build_append_int_noprefix(tbl, f->rtc_century, 1); /* CENTURY */ > > - build_append_int_noprefix(tbl, 0, 2); /* IAPC_BOOT_ARCH */ > > + /* IAPC_BOOT_ARCH */ > > + if (f->rev == 1) { > > + build_append_int_noprefix(tbl, 0, 2); > > + } else { > > + /* since ACPI v2.0 */ > > + build_append_int_noprefix(tbl, f->iapc_boot_arch, 2); > > + } > > build_append_int_noprefix(tbl, 0, 1); /* Reserved */ > > build_append_int_noprefix(tbl, f->flags, 4); /* Flags */ > > > > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c > > index ebd47aa26f..4ad4d7286c 100644 > > --- a/hw/i386/acpi-build.c > > +++ b/hw/i386/acpi-build.c > > @@ -38,6 +38,7 @@ > > #include "hw/nvram/fw_cfg.h" > > #include "hw/acpi/bios-linker-loader.h" > > #include "hw/isa/isa.h" > > +#include "hw/input/i8042.h" > > #include "hw/block/fdc.h" > > #include "hw/acpi/memory_hotplug.h" > > #include "sysemu/tpm.h" > > @@ -192,6 +193,13 @@ static void init_common_fadt_data(MachineState *ms, Object *o, > > .address = object_property_get_uint(o, ACPI_PM_PROP_GPE0_BLK, NULL) > > }, > > }; > > + > > + /* > > + * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture > > + * Flags, bit offset 1 - 8042. > > + */ > > I think we should drop this comment (and one for microvm). > If you like, add > > /* > Table 5-8 Fixed ACPI Description Table (FADT) Format > IAPC_BOOT_ARCH > */ > > instead. > > > Let's do that with a patch on top, we have a soft freeze to consider. Sure. > > > + fadt.iapc_boot_arch = iapc_boot_arch_8042(); > > + > > *data = fadt; > > } > > > > diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h > > index c97e8633ad..2b42e4192b 100644 > > --- a/include/hw/acpi/acpi-defs.h > > +++ b/include/hw/acpi/acpi-defs.h > > @@ -77,6 +77,7 @@ typedef struct AcpiFadtData { > > uint16_t plvl2_lat; /* P_LVL2_LAT */ > > uint16_t plvl3_lat; /* P_LVL3_LAT */ > > uint16_t arm_boot_arch; /* ARM_BOOT_ARCH */ > > + uint16_t iapc_boot_arch; /* IAPC_BOOT_ARCH */ > > uint8_t minor_ver; /* FADT Minor Version */ > > > > /* > > diff --git a/include/hw/input/i8042.h b/include/hw/input/i8042.h > > index 1d90432dae..e070f546e4 100644 > > --- a/include/hw/input/i8042.h > > +++ b/include/hw/input/i8042.h > > @@ -23,4 +23,19 @@ void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq, > > void i8042_isa_mouse_fake_event(ISAKBDState *isa); > > void i8042_setup_a20_line(ISADevice *dev, qemu_irq a20_out); > > > > +static inline bool i8042_present(void) > > +{ > > + bool amb = false; > > + return object_resolve_path_type("", TYPE_I8042, &amb) || amb; > > +} > > + > > +/* > > + * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture > > + * Flags, bit offset 1 - 8042. > > + */ > > +static inline uint16_t iapc_boot_arch_8042(void) > > +{ > > + return i8042_present() ? 0x1 << 1 : 0x0 ; > > +} > > + > > #endif /* HW_INPUT_I8042_H */ > > -- > > 2.25.1 >
On Sun, 6 Mar 2022 19:56:04 +0530 Ani Sinha <ani@anisinha.ca> wrote: > On Sun, Mar 6, 2022 at 4:06 PM Michael S. Tsirkin <mst@redhat.com> wrote: > > > > On Fri, Mar 04, 2022 at 09:10:30PM +0530, Ani Sinha wrote: > > > From: Liav Albani <liavalb@gmail.com> > > > > > > This can allow the guest OS to determine more easily if i8042 controller > > > is present in the system or not, so it doesn't need to do probing of the > > > controller, but just initialize it immediately, before enumerating the > > > ACPI AML namespace. > > > > > > The 8042 bit in IAPC_BOOT_ARCH was introduced from ACPI spec v2 (FADT > > > revision 2 and above). Therefore, in this change, we only enable this bit for > > > x86/q35 machine types since x86/i440fx machines use FADT ACPI table with > > > revision 1. > > > > > > Signed-off-by: Liav Albani <liavalb@gmail.com> > > > Signed-off-by: Ani Sinha <ani@anisinha.ca> > > > --- > > > hw/acpi/aml-build.c | 8 +++++++- > > > hw/i386/acpi-build.c | 8 ++++++++ > > > include/hw/acpi/acpi-defs.h | 1 + > > > include/hw/input/i8042.h | 15 +++++++++++++++ > > > 4 files changed, 31 insertions(+), 1 deletion(-) > > > > > > diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c > > > index 8966e16320..1773cf55f1 100644 > > > --- a/hw/acpi/aml-build.c > > > +++ b/hw/acpi/aml-build.c > > > @@ -2152,7 +2152,13 @@ void build_fadt(GArray *tbl, BIOSLinker *linker, const AcpiFadtData *f, > > > build_append_int_noprefix(tbl, 0, 1); /* DAY_ALRM */ > > > build_append_int_noprefix(tbl, 0, 1); /* MON_ALRM */ > > > build_append_int_noprefix(tbl, f->rtc_century, 1); /* CENTURY */ > > > - build_append_int_noprefix(tbl, 0, 2); /* IAPC_BOOT_ARCH */ > > > + /* IAPC_BOOT_ARCH */ > > > + if (f->rev == 1) { > > > + build_append_int_noprefix(tbl, 0, 2); > > > + } else { > > > + /* since ACPI v2.0 */ > > > + build_append_int_noprefix(tbl, f->iapc_boot_arch, 2); > > > + } > > > build_append_int_noprefix(tbl, 0, 1); /* Reserved */ > > > build_append_int_noprefix(tbl, f->flags, 4); /* Flags */ > > > > > > diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c > > > index ebd47aa26f..4ad4d7286c 100644 > > > --- a/hw/i386/acpi-build.c > > > +++ b/hw/i386/acpi-build.c > > > @@ -38,6 +38,7 @@ > > > #include "hw/nvram/fw_cfg.h" > > > #include "hw/acpi/bios-linker-loader.h" > > > #include "hw/isa/isa.h" > > > +#include "hw/input/i8042.h" > > > #include "hw/block/fdc.h" > > > #include "hw/acpi/memory_hotplug.h" > > > #include "sysemu/tpm.h" > > > @@ -192,6 +193,13 @@ static void init_common_fadt_data(MachineState *ms, Object *o, > > > .address = object_property_get_uint(o, ACPI_PM_PROP_GPE0_BLK, NULL) > > > }, > > > }; > > > + > > > + /* > > > + * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture > > > + * Flags, bit offset 1 - 8042. > > > + */ > > > > I think we should drop this comment (and one for microvm). > > If you like, add > > > > /* > > Table 5-8 Fixed ACPI Description Table (FADT) Format > > IAPC_BOOT_ARCH > > */ > > > > instead. I'd keep spec version though, all chapter/table numbering is version depended. > > > > > > Let's do that with a patch on top, we have a soft freeze to consider. > > Sure. > > > > > > + fadt.iapc_boot_arch = iapc_boot_arch_8042(); > > > + > > > *data = fadt; > > > } > > > > > > diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h > > > index c97e8633ad..2b42e4192b 100644 > > > --- a/include/hw/acpi/acpi-defs.h > > > +++ b/include/hw/acpi/acpi-defs.h > > > @@ -77,6 +77,7 @@ typedef struct AcpiFadtData { > > > uint16_t plvl2_lat; /* P_LVL2_LAT */ > > > uint16_t plvl3_lat; /* P_LVL3_LAT */ > > > uint16_t arm_boot_arch; /* ARM_BOOT_ARCH */ > > > + uint16_t iapc_boot_arch; /* IAPC_BOOT_ARCH */ > > > uint8_t minor_ver; /* FADT Minor Version */ > > > > > > /* > > > diff --git a/include/hw/input/i8042.h b/include/hw/input/i8042.h > > > index 1d90432dae..e070f546e4 100644 > > > --- a/include/hw/input/i8042.h > > > +++ b/include/hw/input/i8042.h > > > @@ -23,4 +23,19 @@ void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq, > > > void i8042_isa_mouse_fake_event(ISAKBDState *isa); > > > void i8042_setup_a20_line(ISADevice *dev, qemu_irq a20_out); > > > > > > +static inline bool i8042_present(void) > > > +{ > > > + bool amb = false; > > > + return object_resolve_path_type("", TYPE_I8042, &amb) || amb; > > > +} > > > + > > > +/* > > > + * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture > > > + * Flags, bit offset 1 - 8042. > > > + */ > > > +static inline uint16_t iapc_boot_arch_8042(void) > > > +{ > > > + return i8042_present() ? 0x1 << 1 : 0x0 ; > > > +} > > > + > > > #endif /* HW_INPUT_I8042_H */ > > > -- > > > 2.25.1 > > >
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index 8966e16320..1773cf55f1 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -2152,7 +2152,13 @@ void build_fadt(GArray *tbl, BIOSLinker *linker, const AcpiFadtData *f, build_append_int_noprefix(tbl, 0, 1); /* DAY_ALRM */ build_append_int_noprefix(tbl, 0, 1); /* MON_ALRM */ build_append_int_noprefix(tbl, f->rtc_century, 1); /* CENTURY */ - build_append_int_noprefix(tbl, 0, 2); /* IAPC_BOOT_ARCH */ + /* IAPC_BOOT_ARCH */ + if (f->rev == 1) { + build_append_int_noprefix(tbl, 0, 2); + } else { + /* since ACPI v2.0 */ + build_append_int_noprefix(tbl, f->iapc_boot_arch, 2); + } build_append_int_noprefix(tbl, 0, 1); /* Reserved */ build_append_int_noprefix(tbl, f->flags, 4); /* Flags */ diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index ebd47aa26f..4ad4d7286c 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -38,6 +38,7 @@ #include "hw/nvram/fw_cfg.h" #include "hw/acpi/bios-linker-loader.h" #include "hw/isa/isa.h" +#include "hw/input/i8042.h" #include "hw/block/fdc.h" #include "hw/acpi/memory_hotplug.h" #include "sysemu/tpm.h" @@ -192,6 +193,13 @@ static void init_common_fadt_data(MachineState *ms, Object *o, .address = object_property_get_uint(o, ACPI_PM_PROP_GPE0_BLK, NULL) }, }; + + /* + * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture + * Flags, bit offset 1 - 8042. + */ + fadt.iapc_boot_arch = iapc_boot_arch_8042(); + *data = fadt; } diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h index c97e8633ad..2b42e4192b 100644 --- a/include/hw/acpi/acpi-defs.h +++ b/include/hw/acpi/acpi-defs.h @@ -77,6 +77,7 @@ typedef struct AcpiFadtData { uint16_t plvl2_lat; /* P_LVL2_LAT */ uint16_t plvl3_lat; /* P_LVL3_LAT */ uint16_t arm_boot_arch; /* ARM_BOOT_ARCH */ + uint16_t iapc_boot_arch; /* IAPC_BOOT_ARCH */ uint8_t minor_ver; /* FADT Minor Version */ /* diff --git a/include/hw/input/i8042.h b/include/hw/input/i8042.h index 1d90432dae..e070f546e4 100644 --- a/include/hw/input/i8042.h +++ b/include/hw/input/i8042.h @@ -23,4 +23,19 @@ void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq, void i8042_isa_mouse_fake_event(ISAKBDState *isa); void i8042_setup_a20_line(ISADevice *dev, qemu_irq a20_out); +static inline bool i8042_present(void) +{ + bool amb = false; + return object_resolve_path_type("", TYPE_I8042, &amb) || amb; +} + +/* + * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture + * Flags, bit offset 1 - 8042. + */ +static inline uint16_t iapc_boot_arch_8042(void) +{ + return i8042_present() ? 0x1 << 1 : 0x0 ; +} + #endif /* HW_INPUT_I8042_H */