Hi Paolo,
Do we have any comment for this Bus lock VM exit QEMU patch?
On 3/17/2021 4:47 PM, Chenyi Qiang wrote:
Virtual Machines can exploit bus locks to degrade the performance of
system. To address this kind of performance DOS attack, bus lock VM exit
is introduced in KVM and it will report
On 3/19/2021 8:37 PM, Marcelo Tosatti wrote:
On Fri, Mar 19, 2021 at 10:59:20AM +0800, Chenyi Qiang wrote:
Hi Marcelo,
Thank you for your comment.
On 3/19/2021 1:32 AM, Marcelo Tosatti wrote:
On Wed, Mar 17, 2021 at 04:47:09PM +0800, Chenyi Qiang wrote:
Virtual Machines can exploit bus lo
On Fri, Mar 19, 2021 at 10:59:20AM +0800, Chenyi Qiang wrote:
> Hi Marcelo,
>
> Thank you for your comment.
>
> On 3/19/2021 1:32 AM, Marcelo Tosatti wrote:
> > On Wed, Mar 17, 2021 at 04:47:09PM +0800, Chenyi Qiang wrote:
> > > Virtual Machines can exploit bus locks to degrade the performance of
On 3/19/2021 10:59 AM, Chenyi Qiang wrote:
Hi Marcelo,
Thank you for your comment.
On 3/19/2021 1:32 AM, Marcelo Tosatti wrote:
On Wed, Mar 17, 2021 at 04:47:09PM +0800, Chenyi Qiang wrote:
Virtual Machines can exploit bus locks to degrade the performance of
system. To address this kind of pe
On 3/19/2021 9:23 AM, Xiaoyao Li wrote:
On 3/17/2021 4:47 PM, Chenyi Qiang wrote:
[...]
MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run)
{
X86CPU *x86_cpu = X86_CPU(cpu);
@@ -4236,6 +4271,11 @@ MemTxAttrs kvm_arch_post_run(CPUState *cpu,
struct kvm_run *run)
Hi Marcelo,
Thank you for your comment.
On 3/19/2021 1:32 AM, Marcelo Tosatti wrote:
On Wed, Mar 17, 2021 at 04:47:09PM +0800, Chenyi Qiang wrote:
Virtual Machines can exploit bus locks to degrade the performance of
system. To address this kind of performance DOS attack, bus lock VM exit
is in
On 3/17/2021 4:47 PM, Chenyi Qiang wrote:
[...]
MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run)
{
X86CPU *x86_cpu = X86_CPU(cpu);
@@ -4236,6 +4271,11 @@ MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct
kvm_run *run)
} else {
env->eflags &= ~IF_MASK;
On Wed, Mar 17, 2021 at 04:47:09PM +0800, Chenyi Qiang wrote:
> Virtual Machines can exploit bus locks to degrade the performance of
> system. To address this kind of performance DOS attack, bus lock VM exit
> is introduced in KVM and it will report the bus locks detected in guest,
> which can help
Virtual Machines can exploit bus locks to degrade the performance of
system. To address this kind of performance DOS attack, bus lock VM exit
is introduced in KVM and it will report the bus locks detected in guest,
which can help userspace to enforce throttling policies.
The availability of bus lo
