On 22/9/2021 8:05 am, Sean Christopherson wrote:
Protect perf_guest_cbs with READ_ONCE/WRITE_ONCE to ensure it's not
reloaded between a !NULL check and a dereference, and wait for all
readers via syncrhonize_rcu() to prevent use-after-free, e.g. if the
callbacks are being unregistered during modu
On 27/8/2021 3:44 pm, Peter Zijlstra wrote:
On Fri, Aug 27, 2021 at 02:52:25PM +0800, Like Xu wrote:
+ STATIC BRANCH/CALL friends.
On 27/8/2021 8:57 am, Sean Christopherson wrote:
This started out as a small series[1] to fix a KVM bug related to Intel PT
interrupt handling and snowballed
+ STATIC BRANCH/CALL friends.
On 27/8/2021 8:57 am, Sean Christopherson wrote:
This started out as a small series[1] to fix a KVM bug related to Intel PT
interrupt handling and snowballed horribly.
The main problem being addressed is that the perf_guest_cbs are shared by
all CPUs, can be nullif
On 27/8/2021 3:59 am, Sean Christopherson wrote:
TL;DR: Please don't merge this patch, it's broken and is also built on a shoddy
foundation that I would like to fix.
Obviously, this patch is not closely related to the guest PEBS feature enabling,
and we can certainly put this issue in a
On 16/7/2021 4:53 pm, Zhu Lingshan wrote:
+ } else if (xenpmu_data->pmu.r.regs.cpl & 3)
Lingshan, serious for this version ?
arch/x86/xen/pmu.c:438:9: error: expected identifier or ‘(’ before ‘return’
438 | return state;
| ^~
arch/x86/xen/pmu.c:439:1: error: e
