linux-kernel - [PATCH v2 1/2] KVM: SVM: Move asid to vcpu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201011184818.3609-2-cavery@redhat.com>
Date:   Sun, 11 Oct 2020 14:48:17 -0400
From:   Cathy Avery <cavery@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        pbonzini@...hat.com
Cc:     vkuznets@...hat.com, wei.huang2@....com, mlevitsk@...hat.com
Subject: [PATCH v2 1/2] KVM: SVM: Move asid to vcpu_svm

Move asid to svm->asid to allow for vmcb assignment
during svm_vcpu_run without regard to which level
guest is running.

Signed-off-by: Cathy Avery <cavery@...hat.com>
---
 arch/x86/kvm/svm/svm.c | 4 +++-
 arch/x86/kvm/svm/svm.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index d4e18bda19c7..619980a5d540 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1101,6 +1101,7 @@ static void init_vmcb(struct vcpu_svm *svm)
 		save->cr4 = 0;
 	}
 	svm->asid_generation = 0;
+	svm->asid = 0;
 
 	svm->nested.vmcb = 0;
 	svm->vcpu.arch.hflags = 0;
@@ -1663,7 +1664,7 @@ static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *sd)
 	}
 
 	svm->asid_generation = sd->asid_generation;
-	svm->vmcb->control.asid = sd->next_asid++;
+	svm->asid = sd->next_asid++;
 
 	vmcb_mark_dirty(svm->vmcb, VMCB_ASID);
 }
@@ -3446,6 +3447,7 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
 
 	sync_lapic_to_cr8(vcpu);
 
+	svm->vmcb->control.asid = svm->asid;
 	svm->vmcb->save.cr2 = vcpu->arch.cr2;
 
 	/*
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index a798e1731709..862f0d2405e8 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -104,6 +104,7 @@ struct vcpu_svm {
 	struct vmcb *vmcb;
 	unsigned long vmcb_pa;
 	struct svm_cpu_data *svm_data;
+	u32 asid;
 	uint64_t asid_generation;
 	uint64_t sysenter_esp;
 	uint64_t sysenter_eip;
-- 
2.20.1