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    Subject[PATCH Part2 v5 32/45] KVM: x86: Define RMP page fault error bits for #NPF
    Date
    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 <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 109e80167f11..a6e764458f3e 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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