From 70e4d278b89e04d7f9397ea25163feb6a7dbaa2d Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 2 Jul 2019 14:58:48 +0200
Subject: [PATCH] target/i386: work around KVM_GET_MSRS bug for secondary
 execution controls

Some secondary controls are automatically enabled/disabled based on the CPUID
values that are set for the guest.  However, they are still available at a
global level and therefore should be present when KVM_GET_MSRS is sent to
/dev/kvm.

Unfortunately KVM forgot to include those, so fix that.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/kvm.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index fafb9fb26d..b97f40df6b 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -474,6 +474,23 @@ uint64_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index)
     value = msr_data.entries[0].data;
     switch (index) {
     case MSR_IA32_VMX_PROCBASED_CTLS2:
+        /* KVM forgot to add these bits for some time, do this ourselves.  */
+        if (kvm_arch_get_supported_cpuid(s, 0xD, 1, R_ECX) & CPUID_XSAVE_XSAVES) {
+            value |= (uint64_t)VMX_SECONDARY_EXEC_XSAVES << 32;
+        }
+        if (kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX) & CPUID_EXT_RDRAND) {
+            value |= (uint64_t)VMX_SECONDARY_EXEC_RDRAND_EXITING << 32;
+        }
+        if (kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX) & CPUID_7_0_EBX_INVPCID) {
+            value |= (uint64_t)VMX_SECONDARY_EXEC_ENABLE_INVPCID << 32;
+        }
+        if (kvm_arch_get_supported_cpuid(s, 7, 0, R_EBX) & CPUID_7_0_EBX_RDSEED) {
+            value |= (uint64_t)VMX_SECONDARY_EXEC_RDSEED_EXITING << 32;
+        }
+        if (kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX) & CPUID_EXT2_RDTSCP) {
+            value |= (uint64_t)VMX_SECONDARY_EXEC_RDTSCP << 32;
+        }
+        /* fall through */
     case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
     case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
     case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
-- 
2.27.0