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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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