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]> Acked-by: Rafael J. Wysocki (Intel) <[email protected]> Signed-off-by: Ricardo Neri <[email protected]> --- Changes in v8: - Added Acked-by tag from Rafael. Thanks! 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
