KVM: SVM: Set synthesized TSA CPUID flags

Commit f3f9dec in the LTS tree.

VERW_CLEAR is supposed to be set only by the hypervisor to denote TSA
mitigation support to a guest. SQ_NO and L1_NO are both synthesizable,
and are going to be set by hw CPUID on future machines.

So keep the kvm_cpu_cap_init_kvm_defined() invocation *and* set them
when synthesized.

This fix is stable-only.

Co-developed-by: Jinpu Wang <jinpu.wang@ionos.com>
Signed-off-by: Jinpu Wang <jinpu.wang@ionos.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org> # 6.1.y
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: bp3tk0v

arch/x86/kvm/cpuid.c

@@ -770,10 +770,15 @@ void kvm_set_cpu_caps(void)
 	if (cpu_feature_enabled(X86_FEATURE_SRSO_NO))
 		kvm_cpu_cap_set(X86_FEATURE_SRSO_NO);
 
+	kvm_cpu_cap_check_and_set(X86_FEATURE_VERW_CLEAR);
+
 	kvm_cpu_cap_init_kvm_defined(CPUID_8000_0021_ECX,
 		F(TSA_SQ_NO) | F(TSA_L1_NO)
 	);
 
+	kvm_cpu_cap_check_and_set(X86_FEATURE_TSA_SQ_NO);
+	kvm_cpu_cap_check_and_set(X86_FEATURE_TSA_L1_NO);
+
 	/*
 	 * Hide RDTSCP and RDPID if either feature is reported as supported but
 	 * probing MSR_TSC_AUX failed.  This is purely a sanity check and