linux-kernel - Re: [PATCH v9] arch/powerpc/kvm: Add support for reading VPA counters for pseries guests

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Message-Id: <171889374980.827284.11720698970898625071.b4-ty@ellerman.id.au>
Date: Fri, 21 Jun 2024 00:29:09 +1000
From: Michael Ellerman <patch-notifications@...erman.id.au>
To: mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu, aneesh.kumar@...nel.org, naveen.n.rao@...ux.ibm.com, Gautam Menghani <gautam@...ux.ibm.com>
Cc: linuxppc-dev@...ts.ozlabs.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org, Naveen N Rao <naveen@...nel.org>, Vaibhav Jain <vaibhav@...ux.ibm.com>
Subject: Re: [PATCH v9] arch/powerpc/kvm: Add support for reading VPA counters for pseries guests

On Mon, 20 May 2024 23:27:40 +0530, Gautam Menghani wrote:
> PAPR hypervisor has introduced three new counters in the VPA area of
> LPAR CPUs for KVM L2 guest (see [1] for terminology) observability - 2
> for context switches from host to guest and vice versa, and 1 counter
> for getting the total time spent inside the KVM guest. Add a tracepoint
> that enables reading the counters for use by ftrace/perf. Note that this
> tracepoint is only available for nestedv2 API (i.e, KVM on PowerVM).
> 
> [...]

Applied to powerpc/topic/ppc-kvm.

[1/1] arch/powerpc/kvm: Add support for reading VPA counters for pseries guests
      https://git.kernel.org/powerpc/c/e1f288d2f9c69bb8965db9fb99a19b58231a00dd

cheers