lkml.org 
[lkml]   [2022]   [Jun]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH Part2 v6 32/49] KVM: x86: Define RMP page fault error bits for #NPF
    Date
    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).

    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 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 | \
    --
    2.25.1
    \
     
     \ /
      Last update: 2022-06-21 01:15    [W:4.767 / U:0.024 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site