linux-kernel - [PATCH 09/52] KVM: Make unloading of FPU state when putting vcpu arch-independent

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: <1198998638-22713-10-git-send-email-avi@qumranet.com>
Date:	Sun, 30 Dec 2007 09:09:55 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	linux-kernel@...r.kernel.org, kvm-devel@...ts.sourceforge.net
Cc:	Amit Shah <amit.shah@...ranet.com>
Subject: [PATCH 09/52] KVM: Make unloading of FPU state when putting vcpu arch-independent

From: Amit Shah <amit.shah@...ranet.com>

Instead of having each architecture do it individually, we
do this in the arch-independent code (just x86 as of now).

[avi: add svm to the mix, which was added to mainline during the
 2.6.24-rc process]

Signed-off-by: Amit Shah <amit.shah@...ranet.com>
Signed-off-by: Avi Kivity <avi@...ranet.com>
---
 drivers/kvm/svm.c |    1 -
 drivers/kvm/vmx.c |    1 -
 drivers/kvm/x86.c |    1 +
 3 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index 94c51a0..928fb35 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -659,7 +659,6 @@ static void svm_vcpu_put(struct kvm_vcpu *vcpu)
 		wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
 
 	rdtscll(vcpu->host_tsc);
-	kvm_put_guest_fpu(vcpu);
 }
 
 static void svm_vcpu_decache(struct kvm_vcpu *vcpu)
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 4e60cf9..c23f399 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -541,7 +541,6 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
 {
 	vmx_load_host_state(to_vmx(vcpu));
-	kvm_put_guest_fpu(vcpu);
 }
 
 static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c
index fdc7632..9618fcb 100644
--- a/drivers/kvm/x86.c
+++ b/drivers/kvm/x86.c
@@ -678,6 +678,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 {
 	kvm_x86_ops->vcpu_put(vcpu);
+	kvm_put_guest_fpu(vcpu);
 }
 
 static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
-- 
1.5.3.7

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/