On Tue, Aug 5, 2014 at 8:26 PM, Xiao Guangrong
xiaoguangr...@linux.vnet.ibm.com wrote:
On 08/06/2014 06:39 AM, David Matlack wrote:
On Mon, Aug 4, 2014 at 8:36 PM, Xiao Guangrong
xiaoguangr...@linux.vnet.ibm.com wrote:
The memory barrier can't help us, consider this scenario:
CPU 0
On Mon, Aug 4, 2014 at 5:31 PM, Wanpeng Li wanpeng...@linux.intel.com wrote:
Hi David,
On Mon, Aug 04, 2014 at 02:10:20PM -0700, David Matlack wrote:
The following events can lead to an incorrect KVM_EXIT_MMIO bubbling
up to userspace:
(1) Guest accesses gpa X without a memory slot. The gfn is
On Mon, Aug 4, 2014 at 8:36 PM, Xiao Guangrong
xiaoguangr...@linux.vnet.ibm.com wrote:
On 08/05/2014 05:10 AM, David Matlack wrote:
This patch fixes the issue by doing the following:
- Tag the mmio cache with the memslot generation and use it to
validate mmio cache lookups.
- Extend
On 08/06/2014 06:39 AM, David Matlack wrote:
On Mon, Aug 4, 2014 at 8:36 PM, Xiao Guangrong
xiaoguangr...@linux.vnet.ibm.com wrote:
On 08/05/2014 05:10 AM, David Matlack wrote:
This patch fixes the issue by doing the following:
- Tag the mmio cache with the memslot generation and use it to
The following events can lead to an incorrect KVM_EXIT_MMIO bubbling
up to userspace:
(1) Guest accesses gpa X without a memory slot. The gfn is cached in
struct kvm_vcpu_arch (mmio_gfn). On Intel EPT-enabled hosts, KVM sets
the SPTE write-execute-noread so that future accesses cause
Hi David,
On Mon, Aug 04, 2014 at 02:10:20PM -0700, David Matlack wrote:
The following events can lead to an incorrect KVM_EXIT_MMIO bubbling
up to userspace:
(1) Guest accesses gpa X without a memory slot. The gfn is cached in
struct kvm_vcpu_arch (mmio_gfn). On Intel EPT-enabled hosts, KVM sets
On 08/05/2014 05:10 AM, David Matlack wrote:
The following events can lead to an incorrect KVM_EXIT_MMIO bubbling
up to userspace:
(1) Guest accesses gpa X without a memory slot. The gfn is cached in
struct kvm_vcpu_arch (mmio_gfn). On Intel EPT-enabled hosts, KVM sets
the SPTE
