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[v12,05/29] KVM: x86: Define RMP page fault error bits for #NPF

Message ID 20240329225835.400662-6-michael.roth@amd.com
State New
Headers show
Series Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support | expand

Commit Message

Michael Roth March 29, 2024, 10:58 p.m. UTC 
From: Brijesh Singh <brijesh.singh@amd.com>

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) with a
number of additional bits set to indicate the reasons for the #NPF.
Define those here.

See APM2 section 16.36.10 for more details.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
[mdr: add some additional details to commit message]
Signed-off-by: Michael Roth <michael.roth@amd.com>
---
 arch/x86/include/asm/kvm_host.h | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 90dc0ae9311a..a3f8eba8d8b6 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -262,9 +262,12 @@  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_IMPLICIT_ACCESS_BIT 48
 
 #define PFERR_PRESENT_MASK	BIT(PFERR_PRESENT_BIT)
@@ -277,7 +280,10 @@  enum x86_intercept_stage;
 #define PFERR_GUEST_FINAL_MASK	BIT_ULL(PFERR_GUEST_FINAL_BIT)
 #define PFERR_GUEST_PAGE_MASK	BIT_ULL(PFERR_GUEST_PAGE_BIT)
 #define PFERR_GUEST_ENC_MASK	BIT_ULL(PFERR_GUEST_ENC_BIT)
+#define PFERR_GUEST_RMP_MASK	BIT_ULL(PFERR_GUEST_RMP_BIT)
+#define PFERR_GUEST_SIZEM_MASK	BIT_ULL(PFERR_GUEST_SIZEM_BIT)
 #define PFERR_IMPLICIT_ACCESS	BIT_ULL(PFERR_IMPLICIT_ACCESS_BIT)
+#define PFERR_GUEST_VMPL_MASK	BIT_ULL(PFERR_GUEST_VMPL_BIT)
 
 #define PFERR_NESTED_GUEST_PAGE (PFERR_GUEST_PAGE_MASK |	\
 				 PFERR_WRITE_MASK |		\