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[RFC PATCH v4 32/36] i386/tdx: Don't synchronize guest tsc for TDs
From: |
Xiaoyao Li |
Subject: |
[RFC PATCH v4 32/36] i386/tdx: Don't synchronize guest tsc for TDs |
Date: |
Thu, 12 May 2022 11:17:59 +0800 |
From: Isaku Yamahata <isaku.yamahata@intel.com>
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 <isaku.yamahata@intel.com>
Reviewed-by: Connor Kuehl <ckuehl@redhat.com>
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
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 9a1e1dab938f..c79dbff747e8 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -276,7 +276,7 @@ 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);
}
--
2.27.0
- [RFC PATCH v4 29/36] i386/tdx: Don't allow system reset for TDX VMs, (continued)
- [RFC PATCH v4 29/36] i386/tdx: Don't allow system reset for TDX VMs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 30/36] hw/i386: add eoi_intercept_unsupported member to X86MachineState, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 26/36] i386/tdx: Finalize TDX VM, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 28/36] i386/tdx: Disable PIC for TDX VMs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 33/36] i386/tdx: Only configure MSR_IA32_UCODE_REV in kvm_init_msrs() for TDs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 35/36] i386/tdx: Don't get/put guest state for TDX VMs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 32/36] i386/tdx: Don't synchronize guest tsc for TDs,
Xiaoyao Li <=
- [RFC PATCH v4 34/36] i386/tdx: Skip kvm_put_apicbase() for TDs, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 31/36] hw/i386: add option to forcibly report edge trigger in acpi tables, Xiaoyao Li, 2022/05/11
- [RFC PATCH v4 36/36] docs: Add TDX documentation, Xiaoyao Li, 2022/05/11