lkml.org 
[lkml]   [2019]   [Jun]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.4 068/241] KVM: arm/arm64: Ensure vcpu target is unset on reset failure
Date
[ Upstream commit 811328fc3222f7b55846de0cd0404339e2e1e6d7 ]

A failed KVM_ARM_VCPU_INIT should not set the vcpu target,
as the vcpu target is used by kvm_vcpu_initialized() to
determine if other vcpu ioctls may proceed. We need to set
the target before calling kvm_reset_vcpu(), but if that call
fails, we should then unset it and clear the feature bitmap
while we're at it.

Signed-off-by: Andrew Jones <drjones@redhat.com>
[maz: Simplified patch, completed commit message]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/kvm/arm.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -744,7 +744,7 @@ int kvm_vm_ioctl_irq_line(struct kvm *kv
static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
const struct kvm_vcpu_init *init)
{
- unsigned int i;
+ unsigned int i, ret;
int phys_target = kvm_target_cpu();

if (init->target != phys_target)
@@ -779,9 +779,14 @@ static int kvm_vcpu_set_target(struct kv
vcpu->arch.target = phys_target;

/* Now we know what it is, we can reset it. */
- return kvm_reset_vcpu(vcpu);
-}
+ ret = kvm_reset_vcpu(vcpu);
+ if (ret) {
+ vcpu->arch.target = -1;
+ bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
+ }

+ return ret;
+}

static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu,
struct kvm_vcpu_init *init)

\
 
 \ /
  Last update: 2019-06-09 18:59    [W:0.600 / U:10.476 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site