From: Tianyu Lan <tiala@xxxxxxxxxxxxx> Add Hyperv-specific handling for faults caused by VMMCALL instructions. Signed-off-by: Tianyu Lan <tiala@xxxxxxxxxxxxx> --- arch/x86/kernel/cpu/mshyperv.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 9d547751a1a7..9f37b51ba94b 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -694,6 +694,20 @@ static bool __init ms_hyperv_msi_ext_dest_id(void) return eax & HYPERV_VS_PROPERTIES_EAX_EXTENDED_IOAPIC_RTE; } +static void hv_sev_es_hcall_prepare(struct ghcb *ghcb, struct pt_regs *regs) +{ + /* RAX and CPL are already in the GHCB */ + ghcb_set_rcx(ghcb, regs->cx); + ghcb_set_rdx(ghcb, regs->dx); + ghcb_set_r8(ghcb, regs->r8); +} + +static bool hv_sev_es_hcall_finish(struct ghcb *ghcb, struct pt_regs *regs) +{ + /* No checking of the return state needed */ + return true; +} + const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv = { .name = "Microsoft Hyper-V", .detect = ms_hyperv_platform, @@ -701,4 +715,6 @@ const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv = { .init.x2apic_available = ms_hyperv_x2apic_available, .init.msi_ext_dest_id = ms_hyperv_msi_ext_dest_id, .init.init_platform = ms_hyperv_init_platform, + .runtime.sev_es_hcall_prepare = hv_sev_es_hcall_prepare, + .runtime.sev_es_hcall_finish = hv_sev_es_hcall_finish, }; -- 2.25.1