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    Subject[PATCH v5 03/26] x86/hyperv: Update 'struct hv_enlightened_vmcs' definition
    Date
    Updated Hyper-V Enlightened VMCS specification lists several new
    fields for the following features:

    - PerfGlobalCtrl
    - EnclsExitingBitmap
    - Tsc Scaling
    - GuestLbrCtl
    - CET
    - SSP

    Update the definition. The updated definition is available only when
    CPUID.0x4000000A.EBX BIT(0) is '1'. Add a define for it as well.

    Note: The latest TLFS is available at
    https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/tlfs/tlfs

    Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
    Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
    ---
    arch/x86/include/asm/hyperv-tlfs.h | 26 ++++++++++++++++++++++++--
    1 file changed, 24 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
    index 6f0acc45e67a..ebc27017fa48 100644
    --- a/arch/x86/include/asm/hyperv-tlfs.h
    +++ b/arch/x86/include/asm/hyperv-tlfs.h
    @@ -138,6 +138,17 @@
    #define HV_X64_NESTED_GUEST_MAPPING_FLUSH BIT(18)
    #define HV_X64_NESTED_MSR_BITMAP BIT(19)

    +/*
    + * Nested quirks. These are HYPERV_CPUID_NESTED_FEATURES.EBX bits.
    + *
    + * Note: HV_X64_NESTED_EVMCS1_2022_UPDATE is not currently documented in any
    + * published TLFS version. When the bit is set, nested hypervisor can use
    + * 'updated' eVMCSv1 specification (perf_global_ctrl, s_cet, ssp, lbr_ctl,
    + * encls_exiting_bitmap, tsc_multiplier fields which were missing in 2016
    + * specification).
    + */
    +#define HV_X64_NESTED_EVMCS1_2022_UPDATE BIT(0)
    +
    /*
    * This is specific to AMD and specifies that enlightened TLB flush is
    * supported. If guest opts in to this feature, ASID invalidations only
    @@ -559,9 +570,20 @@ struct hv_enlightened_vmcs {
    u64 partition_assist_page;
    u64 padding64_4[4];
    u64 guest_bndcfgs;
    - u64 padding64_5[7];
    + u64 guest_ia32_perf_global_ctrl;
    + u64 guest_ia32_s_cet;
    + u64 guest_ssp;
    + u64 guest_ia32_int_ssp_table_addr;
    + u64 guest_ia32_lbr_ctl;
    + u64 padding64_5[2];
    u64 xss_exit_bitmap;
    - u64 padding64_6[7];
    + u64 encls_exiting_bitmap;
    + u64 host_ia32_perf_global_ctrl;
    + u64 tsc_multiplier;
    + u64 host_ia32_s_cet;
    + u64 host_ssp;
    + u64 host_ia32_int_ssp_table_addr;
    + u64 padding64_6;
    } __packed;

    #define HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE 0
    --
    2.35.3
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