From: Xiaoyao Li <xiaoyao.li@intel.com>
Date: Thu, 8 May 2025 14:59:59 +0000 (-0400)
Subject: i386/tdx: Make invtsc default on
X-Git-Tag: v10.1.0-rc0~69^2~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ea4867b911fc2f6d4c8bd50ec62f0dc0fa190fab;p=thirdparty%2Fqemu.git

i386/tdx: Make invtsc default on

Because it's fixed1 bit that enforced by TDX module.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250508150002.689633-54-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index 76293029917..a55ab436ad9 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -742,6 +742,9 @@ static void tdx_cpu_instance_init(X86ConfidentialGuest *cg, CPUState *cpu)
 
     object_property_set_bool(OBJECT(cpu), "pmu", false, &error_abort);
 
+    /* invtsc is fixed1 for TD guest */
+    object_property_set_bool(OBJECT(cpu), "invtsc", true, &error_abort);
+
     x86cpu->enable_cpuid_0x1f = true;
 }