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Subject[PATCH Part2 RFC v4 30/40] KVM: X86: Define new RMP check related #NPF error bits
Date
When SEV-SNP is enabled globally, the hardware places restrictions on all
memory accesses based on the RMP entry, whether the hyperviso 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 <brijesh.singh@amd.com>
---
arch/x86/include/asm/kvm_host.h | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index cd2e19e1d323..59185b6bc82a 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -239,8 +239,12 @@ 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_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)
@@ -251,6 +255,10 @@ enum x86_intercept_stage;
#define PFERR_SGX_MASK (1U << PFERR_SGX_BIT)
#define PFERR_GUEST_FINAL_MASK (1ULL << PFERR_GUEST_FINAL_BIT)
#define PFERR_GUEST_PAGE_MASK (1ULL << PFERR_GUEST_PAGE_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 | \
--
2.17.1
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