47 lines
1.7 KiB
Diff
47 lines
1.7 KiB
Diff
From 6339bd26122c876a663e841810de28c064e09128 Mon Sep 17 00:00:00 2001
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Fri, 18 Jul 2025 18:03:47 +0200
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Subject: [PATCH 068/115] i386/tdx: Don't synchronize guest tsc for TDs
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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RH-MergeRequest: 391: TDX support, including attestation and device assignment
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RH-Jira: RHEL-15710 RHEL-20798 RHEL-49728
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RH-Acked-by: Yash Mankad <None>
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RH-Acked-by: Peter Xu <peterx@redhat.com>
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RH-Acked-by: David Hildenbrand <david@redhat.com>
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RH-Commit: [68/115] 56f6dc49e20933d8539b2413a902a2fbad2751e0 (bonzini/rhel-qemu-kvm)
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TSC of TDs is not accessible and KVM doesn't allow access of
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MSR_IA32_TSC for TDs. To avoid the assert() in kvm_get_tsc, make
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kvm_synchronize_all_tsc() noop for TDs,
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Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
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Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
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Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
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Acked-by: Gerd Hoffmann <kraxel@redhat.com>
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Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
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Link: https://lore.kernel.org/r/20250508150002.689633-40-xiaoyao.li@intel.com
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit 0ed55865b49b703af93e160d48935812a7114e07)
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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---
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target/i386/kvm/kvm.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
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index f4809ee004..0c47eef03c 100644
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--- a/target/i386/kvm/kvm.c
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+++ b/target/i386/kvm/kvm.c
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@@ -319,7 +319,7 @@ void kvm_synchronize_all_tsc(void)
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{
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CPUState *cpu;
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- if (kvm_enabled()) {
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+ if (kvm_enabled() && !is_tdx_vm()) {
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CPU_FOREACH(cpu) {
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run_on_cpu(cpu, do_kvm_synchronize_tsc, RUN_ON_CPU_NULL);
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}
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--
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2.50.1
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