Hi Leo,
On 2020-10-16 12:54, Leo Yan wrote:
On Thu, Oct 15, 2020 at 11:40:05PM -0700, Denis Nikitin wrote:
Hi Mathieu,
I think one of the use cases could be VMs.
Is there isolation between EL1 guest kernels which we can control from
perf
in a system wide mode?
Sorry for suddenly jumping in.
For KVM, I think we need to implement mechanism for saving/restoring
CoreSight context for every guest OS, the CPU PMUs has implemented
related features [1].
Thanks,
Leo
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/kvm/pmu.c
What happens to the sysfs mode of tracing? For that we would still
need a config right to exclude kernel mode tracing completely.
Thanks,
Sai
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