From 6339bd26122c876a663e841810de28c064e09128 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 18 Jul 2025 18:03:47 +0200 Subject: [PATCH 068/115] i386/tdx: Don't synchronize guest tsc for TDs RH-Author: Paolo Bonzini RH-MergeRequest: 391: TDX support, including attestation and device assignment RH-Jira: RHEL-15710 RHEL-20798 RHEL-49728 RH-Acked-by: Yash Mankad RH-Acked-by: Peter Xu RH-Acked-by: David Hildenbrand RH-Commit: [68/115] 56f6dc49e20933d8539b2413a902a2fbad2751e0 (bonzini/rhel-qemu-kvm) TSC of TDs is not accessible and KVM doesn't allow access of MSR_IA32_TSC for TDs. To avoid the assert() in kvm_get_tsc, make kvm_synchronize_all_tsc() noop for TDs, Signed-off-by: Isaku Yamahata Reviewed-by: Connor Kuehl Signed-off-by: Xiaoyao Li Acked-by: Gerd Hoffmann Reviewed-by: Zhao Liu Link: https://lore.kernel.org/r/20250508150002.689633-40-xiaoyao.li@intel.com Signed-off-by: Paolo Bonzini (cherry picked from commit 0ed55865b49b703af93e160d48935812a7114e07) Signed-off-by: Paolo Bonzini --- target/i386/kvm/kvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index f4809ee004..0c47eef03c 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -319,7 +319,7 @@ void kvm_synchronize_all_tsc(void) { CPUState *cpu; - if (kvm_enabled()) { + if (kvm_enabled() && !is_tdx_vm()) { CPU_FOREACH(cpu) { run_on_cpu(cpu, do_kvm_synchronize_tsc, RUN_ON_CPU_NULL); } -- 2.50.1