[PATCH 11/15] KVM: x86: Introduce generic gva to gpa translation function

Nikolas Wipper
2024-09-10T15:25:32Z

Introduce a function to translate gvas to gpas with the ability to control
set_bit_mode, access mode and flags, as well as receive status codes.

Signed-off-by: Nikolas Wipper <nikwip@amazon.de>
---
arch/x86/include/asm/kvm_host.h | 3 +++
arch/x86/kvm/x86.c | 11 +++++++++++
2 files changed, 14 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 7ac1956f6f9b..ae05e917d7ea 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -2160,6 +2160,9 @@ static inline bool kvm_mmu_unprotect_gfn_and_retry(struct kvm_vcpu *vcpu,
void kvm_mmu_free_roots(struct kvm *kvm, struct kvm_mmu *mmu,
ulong roots_to_free);
void kvm_mmu_free_guest_mode_roots(struct kvm *kvm, struct kvm_mmu *mmu);
+gpa_t kvm_mmu_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t gva, u64 access,
+ u64 flags, struct x86_exception *exception,
+ u16 *status);
gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
struct x86_exception *exception);
gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index be696b60aba6..27fc71aaa1e4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7577,6 +7577,17 @@ gpa_t translate_nested_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u64 access,
return t_gpa;
}

+gpa_t kvm_mmu_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t gva, u64 access,
+ u64 flags, struct x86_exception *exception,
+ u16 *status)
+{
+ struct kvm_mmu *mmu = vcpu->arch.walk_mmu;
+
+ return mmu->gva_to_gpa(vcpu, mmu, gva, access, flags, exception,
+ status);
+}
+EXPORT_SYMBOL_GPL(kvm_mmu_gva_to_gpa);
+
gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
struct x86_exception *exception)
{