[Part2,v6,32/49] KVM: x86: Define RMP page fault error bits for #NPF

Commit Message

Kalra, Ashish June 20, 2022, 11:09 p.m. UTC

From: Brijesh Singh <[e-mail]>

When SEV-SNP is enabled globally, the hardware places restrictions on all
memory accesses based on the RMP entry, whether the hypervisor or a VM,
performs the accesses. When hardware encounters an RMP access violation
during a guest access, it will cause a #VMEXIT(NPF).

See APM2 section 16.36.10 for more details.

Signed-off-by: Brijesh Singh <[e-mail]>
---
 arch/x86/include/asm/kvm_host.h | 8 ++++++++
 1 file changed, 8 insertions(+)

Patch

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 2748c69609e3..49b217dc8d7e 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -247,9 +247,13 @@  enum x86_intercept_stage;
 #define PFERR_FETCH_BIT 4
 #define PFERR_PK_BIT 5
 #define PFERR_SGX_BIT 15
+#define PFERR_GUEST_RMP_BIT 31
 #define PFERR_GUEST_FINAL_BIT 32
 #define PFERR_GUEST_PAGE_BIT 33
 #define PFERR_IMPLICIT_ACCESS_BIT 48
+#define PFERR_GUEST_ENC_BIT 34
+#define PFERR_GUEST_SIZEM_BIT 35
+#define PFERR_GUEST_VMPL_BIT 36
 
 #define PFERR_PRESENT_MASK (1U << PFERR_PRESENT_BIT)
 #define PFERR_WRITE_MASK (1U << PFERR_WRITE_BIT)
@@ -261,6 +265,10 @@  enum x86_intercept_stage;
 #define PFERR_GUEST_FINAL_MASK (1ULL << PFERR_GUEST_FINAL_BIT)
 #define PFERR_GUEST_PAGE_MASK (1ULL << PFERR_GUEST_PAGE_BIT)
 #define PFERR_IMPLICIT_ACCESS (1ULL << PFERR_IMPLICIT_ACCESS_BIT)
+#define PFERR_GUEST_RMP_MASK (1ULL << PFERR_GUEST_RMP_BIT)
+#define PFERR_GUEST_ENC_MASK (1ULL << PFERR_GUEST_ENC_BIT)
+#define PFERR_GUEST_SIZEM_MASK (1ULL << PFERR_GUEST_SIZEM_BIT)
+#define PFERR_GUEST_VMPL_MASK (1ULL << PFERR_GUEST_VMPL_BIT)
 
 #define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK |	\
 				 PFERR_WRITE_MASK |		\