[PATCH 07/18] KVM: x86: hyper-v: Exit on TranslateVirtualAddress hcall
From: Nicolas Saenz Julienne <hidden>
Date: 2024-06-09 15:54:59
Also in:
kvm, linux-arch, linux-doc, linux-hyperv, lkml
Subsystem:
generic include/asm header files, kernel virtual machine for x86 (kvm/x86), kvm x86 hyper-v (kvm/hyper-v), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Arnd Bergmann, Sean Christopherson, Paolo Bonzini, Vitaly Kuznetsov, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Handle HvTranslateVirtualAddress in user-space. The hypercall is VTL-aware and only used in the context of VSM. Additionally, the TLFS doesn't introduce an ad-hoc CPUID bit for it, so the hypercall availability is tracked as part of the HV_ACCESS_VSM CPUID. This will be documented with the main VSM commit. Signed-off-by: Nicolas Saenz Julienne <redacted> --- arch/x86/kvm/hyperv.c | 3 +++ include/asm-generic/hyperv-tlfs.h | 1 + 2 files changed, 4 insertions(+)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index d0edc2bec5a4f..cbe2aca52514b 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c@@ -2427,6 +2427,7 @@ static bool kvm_hv_is_xmm_output_hcall(u16 code) { switch (code) { case HVCALL_GET_VP_REGISTERS: + case HVCALL_TRANSLATE_VIRTUAL_ADDRESS: return true; }
@@ -2512,6 +2513,7 @@ static bool is_xmm_fast_hypercall(struct kvm_hv_hcall *hc) case HVCALL_SEND_IPI_EX: case HVCALL_GET_VP_REGISTERS: case HVCALL_SET_VP_REGISTERS: + case HVCALL_TRANSLATE_VIRTUAL_ADDRESS: return true; }
@@ -2740,6 +2742,7 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu) goto hypercall_userspace_exit; case HVCALL_GET_VP_REGISTERS: case HVCALL_SET_VP_REGISTERS: + case HVCALL_TRANSLATE_VIRTUAL_ADDRESS: goto hypercall_userspace_exit; default: ret = HV_STATUS_INVALID_HYPERCALL_CODE;
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index 9e909f0834598..57c791c555861 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h@@ -159,6 +159,7 @@ union hv_reference_tsc_msr { #define HVCALL_CREATE_VP 0x004e #define HVCALL_GET_VP_REGISTERS 0x0050 #define HVCALL_SET_VP_REGISTERS 0x0051 +#define HVCALL_TRANSLATE_VIRTUAL_ADDRESS 0x0052 #define HVCALL_POST_MESSAGE 0x005c #define HVCALL_SIGNAL_EVENT 0x005d #define HVCALL_POST_DEBUG_DATA 0x0069
--
2.40.1