From: Alexey Kardashevskiy <aik@amd.com>
To: <kvm@vger.kernel.org>
Cc: <x86@kernel.org>, <linux-kernel@vger.kernel.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Sean Christopherson <seanjc@google.com>,
"Alexey Kardashevskiy" <aik@amd.com>
Subject: [PATCH kernel 7/9] KVM: SEV-ES: Eliminate #DB intercept when DebugSwap enabled
Date: Thu, 15 Jun 2023 16:37:55 +1000 [thread overview]
Message-ID: <20230615063757.3039121-8-aik@amd.com> (raw)
In-Reply-To: <20230615063757.3039121-1-aik@amd.com>
Disable #DB for SEV-ES guests when DebugSwap is enabled. There is no point
in such intercept as KVM does not allow guest debug for SEV-ES guests.
Signed-off-by: Alexey Kardashevskiy <aik@amd.com>
---
Changes:
v6:
* new to the series
---
arch/x86/kvm/svm/sev.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index abc502ce7871..9c43cbdab022 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -3000,6 +3000,8 @@ static void sev_es_init_vmcb(struct vcpu_svm *svm)
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_READ);
vmcb_set_intercept(&vmcb->control, INTERCEPT_DR7_WRITE);
recalc_intercepts(svm);
+ } else {
+ clr_exception_intercept(svm, DB_VECTOR);
}
/* Can't intercept XSETBV, HV can't modify XCR0 directly */
--
2.40.1
next prev parent reply other threads:[~2023-06-15 6:47 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-15 6:37 [PATCH kernel 0/9] KVM: SEV: Enable AMD SEV-ES DebugSwap Alexey Kardashevskiy
2023-06-15 6:37 ` [PATCH kernel 1/9] KVM: SEV: move set_dr_intercepts/clr_dr_intercepts from the header Alexey Kardashevskiy
2023-06-15 6:37 ` [PATCH kernel 2/9] KVM: SEV: Move SEV's GP_VECTOR intercept setup to SEV Alexey Kardashevskiy
2023-06-15 6:37 ` [PATCH kernel 3/9] KVM: SVM: Rewrite sev_es_prepare_switch_to_guest()'s comment about swap types Alexey Kardashevskiy
2023-06-15 6:37 ` [PATCH kernel 4/9] KVM: SEV-ES: explicitly disable debug Alexey Kardashevskiy
2023-06-15 6:37 ` [PATCH kernel 5/9] KVM: SVM/SEV/SEV-ES: Rework intercepts Alexey Kardashevskiy
2023-06-30 21:49 ` Sean Christopherson
2023-07-03 2:01 ` Alexey Kardashevskiy
2023-06-15 6:37 ` [PATCH kernel 6/9] KVM: SEV: Enable data breakpoints in SEV-ES Alexey Kardashevskiy
2023-06-15 6:37 ` Alexey Kardashevskiy [this message]
2023-06-15 6:37 ` [PATCH kernel 8/9] KVM: SVM: Don't defer NMI unblocking until next exit for SEV-ES guests Alexey Kardashevskiy
2023-06-15 6:37 ` [PATCH kernel 9/9] KVM: SVM: Don't try to pointlessly single-step SEV-ES guests for NMI window Alexey Kardashevskiy
2023-06-15 7:13 ` [PATCH kernel 0/9 v6] KVM: SEV: Enable AMD SEV-ES DebugSwap Alexey Kardashevskiy
2023-06-23 1:35 ` Alexey Kardashevskiy
2023-06-23 14:19 ` Sean Christopherson
2023-06-30 2:08 ` Alexey Kardashevskiy
2023-06-30 21:52 ` Sean Christopherson
2023-07-20 19:01 ` Alexey Kardashevskiy
2023-07-28 23:49 ` [PATCH kernel 0/9] " Sean Christopherson
2023-07-29 1:57 ` Alexey Kardashevskiy
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