diff options
| -rw-r--r-- | arch/x86/hyperv/hv_vtl.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c index b94fffa67312..1e2f5b3ea772 100644 --- a/arch/x86/hyperv/hv_vtl.c +++ b/arch/x86/hyperv/hv_vtl.c @@ -6,6 +6,9 @@ * Saurabh Sengar <ssengar@microsoft.com> */ +#include <linux/acpi.h> + +#include <asm/acpi.h> #include <asm/apic.h> #include <asm/boot.h> #include <asm/desc.h> @@ -59,6 +62,18 @@ static void __noreturn hv_vtl_restart(char __maybe_unused *cmd) hv_vtl_emergency_restart(); } +static inline bool within_page(u64 addr, u64 start) +{ + return addr >= start && addr < (start + PAGE_SIZE); +} + +static bool hv_vtl_is_private_mmio_tdx(u64 addr) +{ + u64 mb_addr = acpi_get_mp_wakeup_mailbox_paddr(); + + return mb_addr && within_page(addr, mb_addr); +} + void __init hv_vtl_init_platform(void) { /* @@ -71,6 +86,8 @@ void __init hv_vtl_init_platform(void) /* There is no paravisor present if we are here. */ if (hv_isolation_type_tdx()) { x86_init.resources.realmode_limit = SZ_4G; + x86_platform.hyper.is_private_mmio = hv_vtl_is_private_mmio_tdx; + } else { x86_platform.realmode_reserve = x86_init_noop; x86_platform.realmode_init = x86_init_noop; |