On Mon, Nov 17, 2025 at 6:04 PM Ricardo Neri <[email protected]> wrote: > > A Hyper-V VTL level 2 guest in a TDX environment needs to map the physical > page of the ACPI Multiprocessor Wakeup Structure as private (encrypted). It > needs to know the physical address of this structure. Add a helper function > to retrieve the address. > > Suggested-by: Michael Kelley <[email protected]> > Signed-off-by: Ricardo Neri <[email protected]>
Acked-by: Rafael J. Wysocki (Intel) <[email protected]> > --- > Changes in v7: > - Moved the added function to arch/x86/kernel/acpi/madt_wakeup.c > - Dropped Reviewed-by tags from Dexuan and Michael as this patch > changed. > > Changes in v6: > - Added Reviewed-by tag from Dexuan. Thanks! > > Changes in v5: > - None > > Changes in v4: > - Renamed function to acpi_get_mp_wakeup_mailbox_paddr(). > - Added Reviewed-by tag from Michael. Thanks! > > Changes in v3: > - Introduced this patch > > Changes in v2: > - N/A > --- > arch/x86/include/asm/acpi.h | 6 ++++++ > arch/x86/kernel/acpi/madt_wakeup.c | 5 +++++ > 2 files changed, 11 insertions(+) > > diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h > index 820df375df79..c4e6459bd56b 100644 > --- a/arch/x86/include/asm/acpi.h > +++ b/arch/x86/include/asm/acpi.h > @@ -184,6 +184,7 @@ void __iomem *x86_acpi_os_ioremap(acpi_physical_address > phys, acpi_size size); > > void acpi_setup_mp_wakeup_mailbox(u64 addr); > struct acpi_madt_multiproc_wakeup_mailbox *acpi_get_mp_wakeup_mailbox(void); > +u64 acpi_get_mp_wakeup_mailbox_paddr(void); > > #else /* !CONFIG_ACPI */ > > @@ -210,6 +211,11 @@ static inline struct acpi_madt_multiproc_wakeup_mailbox > *acpi_get_mp_wakeup_mail > return NULL; > } > > +static inline u64 acpi_get_mp_wakeup_mailbox_paddr(void) > +{ > + return 0; > +} > + > #endif /* !CONFIG_ACPI */ > > #define ARCH_HAS_POWER_INIT 1 > diff --git a/arch/x86/kernel/acpi/madt_wakeup.c > b/arch/x86/kernel/acpi/madt_wakeup.c > index 82caf44b45e3..48734e4a6e8f 100644 > --- a/arch/x86/kernel/acpi/madt_wakeup.c > +++ b/arch/x86/kernel/acpi/madt_wakeup.c > @@ -258,3 +258,8 @@ struct acpi_madt_multiproc_wakeup_mailbox > *acpi_get_mp_wakeup_mailbox(void) > { > return acpi_mp_wake_mailbox; > } > + > +u64 acpi_get_mp_wakeup_mailbox_paddr(void) > +{ > + return acpi_mp_wake_mailbox_paddr; > +} > > -- > 2.43.0 >
