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Message-Id: <98ef065d15d4ab59e9b92932cb197b98f03bb8df.1697471314.git.isaku.yamahata@intel.com>
Date: Mon, 16 Oct 2023 09:14:22 -0700
From: isaku.yamahata@...el.com
To: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: isaku.yamahata@...el.com, isaku.yamahata@...il.com,
Paolo Bonzini <pbonzini@...hat.com>, erdemaktas@...gle.com,
Sean Christopherson <seanjc@...gle.com>,
Sagi Shahar <sagis@...gle.com>,
David Matlack <dmatlack@...gle.com>,
Kai Huang <kai.huang@...el.com>,
Zhi Wang <zhi.wang.linux@...il.com>, chen.bo@...el.com,
hang.yuan@...el.com, tina.zhang@...el.com
Subject: [PATCH v16 070/116] KVM: TDX: restore debug store when TD exit
From: Isaku Yamahata <isaku.yamahata@...el.com>
Because debug store is clobbered, restore it on TD exit.
Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>
---
arch/x86/events/intel/ds.c | 1 +
arch/x86/kvm/vmx/tdx.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index eb8dd8b8a1e8..58e86b726436 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -2428,3 +2428,4 @@ void perf_restore_debug_store(void)
wrmsrl(MSR_IA32_DS_AREA, (unsigned long)ds);
}
+EXPORT_SYMBOL_GPL(perf_restore_debug_store);
diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index e29df39630e8..a4401ae851d4 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -639,6 +639,7 @@ fastpath_t tdx_vcpu_run(struct kvm_vcpu *vcpu)
tdx_vcpu_enter_exit(tdx);
tdx_user_return_update_cache(vcpu);
+ perf_restore_debug_store();
tdx_restore_host_xsave_state(vcpu);
tdx->host_state_need_restore = true;
--
2.25.1
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