On Thu, Sep 03, 2020 at 08:52:41AM +0800, Xiaoyao Li wrote:
> On 9/3/2020 6:44 AM, Sean Christopherson wrote:
> > On Tue, Sep 01, 2020 at 10:43:12AM +0200, Vitaly Kuznetsov wrote:
> > > > + vcpu->arch.bus_lock_detected = true;
> > > > + } else {
> > > > +
On 9/3/2020 6:44 AM, Sean Christopherson wrote:
On Tue, Sep 01, 2020 at 10:43:12AM +0200, Vitaly Kuznetsov wrote:
@@ -6809,6 +6824,19 @@ static fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu)
if (unlikely(vmx->exit_reason.failed_vmentry))
return EXIT_FASTPATH_NONE;
+ /*
On Tue, Sep 01, 2020 at 10:43:12AM +0200, Vitaly Kuznetsov wrote:
> > @@ -6809,6 +6824,19 @@ static fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu)
> > if (unlikely(vmx->exit_reason.failed_vmentry))
> > return EXIT_FASTPATH_NONE;
> >
> > + /*
> > +* check the exit_reason to s
On 9/1/2020 4:43 PM, Vitaly Kuznetsov wrote:
Chenyi Qiang writes:
Virtual Machine can exploit bus locks to degrade the performance of
system. Bus lock can be caused by split locked access to writeback(WB)
memory or by using locks on uncacheable(UC) memory. The bus lock is
typically >1000 cy
Chenyi Qiang writes:
> Virtual Machine can exploit bus locks to degrade the performance of
> system. Bus lock can be caused by split locked access to writeback(WB)
> memory or by using locks on uncacheable(UC) memory. The bus lock is
> typically >1000 cycles slower than an atomic operation within
Virtual Machine can exploit bus locks to degrade the performance of
system. Bus lock can be caused by split locked access to writeback(WB)
memory or by using locks on uncacheable(UC) memory. The bus lock is
typically >1000 cycles slower than an atomic operation within a cache
line. It also disrupts
Virtual Machine can exploit bus locks to degrade the performance of
system. Bus lock can be caused by split locked access to writeback(WB)
memory or by using locks on uncacheable(UC) memory. The bus lock is
typically >1000 cycles slower than an atomic operation within a cache
line. It also disrupts
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