lkml.org 
[lkml]   [2020]   [Nov]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v14 03/13] KVM: x86: Add #CP support in guest exception dispatch
    Date
    Add handling for Control Protection (#CP) exceptions, vector 21, used
    and introduced by Intel's Control-Flow Enforcement Technology (CET).
    relevant CET violation case. See Intel's SDM for details.

    Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
    ---
    arch/x86/include/uapi/asm/kvm.h | 1 +
    arch/x86/kvm/x86.c | 1 +
    arch/x86/kvm/x86.h | 2 +-
    3 files changed, 3 insertions(+), 1 deletion(-)

    diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h
    index 89e5f3d1bba8..9dc2c58d894b 100644
    --- a/arch/x86/include/uapi/asm/kvm.h
    +++ b/arch/x86/include/uapi/asm/kvm.h
    @@ -31,6 +31,7 @@
    #define MC_VECTOR 18
    #define XM_VECTOR 19
    #define VE_VECTOR 20
    +#define CP_VECTOR 21

    /* Select x86 specific features in <linux/kvm.h> */
    #define __KVM_HAVE_PIT
    diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
    index 0823bf1e2977..0433015ee443 100644
    --- a/arch/x86/kvm/x86.c
    +++ b/arch/x86/kvm/x86.c
    @@ -433,6 +433,7 @@ static int exception_class(int vector)
    case NP_VECTOR:
    case SS_VECTOR:
    case GP_VECTOR:
    + case CP_VECTOR:
    return EXCPT_CONTRIBUTORY;
    default:
    break;
    diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
    index 3900ab0c6004..74858c18978a 100644
    --- a/arch/x86/kvm/x86.h
    +++ b/arch/x86/kvm/x86.h
    @@ -115,7 +115,7 @@ static inline bool x86_exception_has_error_code(unsigned int vector)
    {
    static u32 exception_has_error_code = BIT(DF_VECTOR) | BIT(TS_VECTOR) |
    BIT(NP_VECTOR) | BIT(SS_VECTOR) | BIT(GP_VECTOR) |
    - BIT(PF_VECTOR) | BIT(AC_VECTOR);
    + BIT(PF_VECTOR) | BIT(AC_VECTOR) | BIT(CP_VECTOR);

    return (1U << vector) & exception_has_error_code;
    }
    --
    2.17.2
    \
     
     \ /
      Last update: 2020-11-06 02:06    [W:4.525 / U:0.172 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site