[GIT PULL] perf/core for v5.17

[GIT PULL] perf/core for v5.17

[Borislav Petkov]

Hi Linus,

please pull the perf/core pile for v5.17 which deals with the perf <-> kvm
side of things this time around.

Thx.

---

The following changes since commit fa55b7dcdc43c1aa1ba12bca9d2dd4318c2a0dbf:

  Linux 5.16-rc1 (2021-11-14 13:56:52 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tags/perf_core_for_v5.17_rc1

for you to fetch changes up to a9f4a6e92b3b319296fb078da2615f618f6cd80c:

  perf: Drop guest callback (un)register stubs (2021-11-17 14:49:12 +0100)

----------------------------------------------------------------
Peter Zijlstra says:

"Cleanup of the perf/kvm interaction."

----------------------------------------------------------------
Like Xu (1):
      perf/core: Rework guest callbacks to prepare for static_call support

Sean Christopherson (16):
      perf: Protect perf_guest_cbs with RCU
      KVM: x86: Register perf callbacks after calling vendor's hardware_setup()
      KVM: x86: Register Processor Trace interrupt hook iff PT enabled in guest
      perf: Stop pretending that perf can handle multiple guest callbacks
      perf: Drop dead and useless guest "support" from arm, csky, nds32 and riscv
      perf: Add wrappers for invoking guest callbacks
      perf: Force architectures to opt-in to guest callbacks
      perf/core: Use static_call to optimize perf_guest_info_callbacks
      KVM: x86: Drop current_vcpu for kvm_running_vcpu + kvm_arch_vcpu variable
      KVM: x86: More precisely identify NMI from guest when handling PMI
      KVM: Move x86's perf guest info callbacks to generic KVM
      KVM: x86: Move Intel Processor Trace interrupt handler to vmx.c
      KVM: arm64: Convert to the generic perf callbacks
      KVM: arm64: Hide kvm_arm_pmu_available behind CONFIG_HW_PERF_EVENTS=y
      KVM: arm64: Drop perf.c and fold its tiny bits of code into arm.c
      perf: Drop guest callback (un)register stubs

 arch/arm/kernel/perf_callchain.c   | 28 +++---------------
 arch/arm64/include/asm/kvm_host.h  | 11 +++++--
 arch/arm64/kernel/image-vars.h     |  2 ++
 arch/arm64/kernel/perf_callchain.c | 13 +++++----
 arch/arm64/kvm/Kconfig             |  1 +
 arch/arm64/kvm/Makefile            |  2 +-
 arch/arm64/kvm/arm.c               | 10 +++++--
 arch/arm64/kvm/perf.c              | 59 --------------------------------------
 arch/arm64/kvm/pmu-emul.c          |  2 ++
 arch/csky/kernel/perf_callchain.c  | 10 -------
 arch/nds32/kernel/perf_event_cpu.c | 29 +++----------------
 arch/riscv/kernel/perf_callchain.c | 10 -------
 arch/x86/events/core.c             | 13 +++++----
 arch/x86/events/intel/core.c       |  5 +---
 arch/x86/include/asm/kvm_host.h    |  7 +++--
 arch/x86/kvm/Kconfig               |  1 +
 arch/x86/kvm/pmu.c                 |  2 +-
 arch/x86/kvm/svm/svm.c             |  2 +-
 arch/x86/kvm/vmx/vmx.c             | 25 +++++++++++++++-
 arch/x86/kvm/x86.c                 | 58 +++++++------------------------------
 arch/x86/kvm/x86.h                 | 17 ++++++++---
 arch/x86/xen/Kconfig               |  1 +
 arch/x86/xen/pmu.c                 | 32 +++++++++------------
 include/kvm/arm_pmu.h              | 19 +++++++-----
 include/linux/kvm_host.h           | 10 +++++++
 include/linux/perf_event.h         | 44 ++++++++++++++++++++--------
 init/Kconfig                       |  4 +++
 kernel/events/core.c               | 41 ++++++++++++++++++--------
 virt/kvm/kvm_main.c                | 44 ++++++++++++++++++++++++++++
 29 files changed, 246 insertions(+), 256 deletions(-)
 delete mode 100644 arch/arm64/kvm/perf.c

-- 
Regards/Gruss,
    Boris.

SUSE Software Solutions Germany GmbH, GF: Ivo Totev, HRB 36809, AG Nürnberg

Re: [GIT PULL] perf/core for v5.17

[Sean Christopherson]

On Tue, Jan 11, 2022, Borislav Petkov wrote:
>       KVM: Move x86's perf guest info callbacks to generic KVM

This commit, e1bfc24577cc, introduces a new warning on arm64 with CONFIG_GUEST_PERF_EVENTS=n.

  >> arch/arm64/kvm/arm.c:499:15: warning: no previous prototype for function 'kvm_arch_vcpu_get_ip' [-Wmissing-prototypes]
     unsigned long kvm_arch_vcpu_get_ip(struct kvm_vcpu *vcpu)

I floated a potential fix[*], but we all lost track of it.  I assume the easiest
solution at this point is to post a proper patch to go on top?

---
 arch/arm64/kvm/arm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 8129ee1ed3a4..e3b46951a92d 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -496,10 +496,12 @@ bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
 	return vcpu_mode_priv(vcpu);
 }

+#ifdef CONFIG_GUEST_PERF_EVENTS
 unsigned long kvm_arch_vcpu_get_ip(struct kvm_vcpu *vcpu)
 {
 	return *vcpu_pc(vcpu);
 }
+#endif

 /* Just ensure a guest exit from a particular CPU */
 static void exit_vm_noop(void *info)
--

[*] https://lore.kernel.org/all/YZvysKFSLTxDzaBs@google.com/

Re: [GIT PULL] perf/core for v5.17

[Borislav Petkov]

On Tue, Jan 11, 2022 at 09:21:16PM +0000, Sean Christopherson wrote:
> On Tue, Jan 11, 2022, Borislav Petkov wrote:
> >       KVM: Move x86's perf guest info callbacks to generic KVM
> 
> This commit, e1bfc24577cc, introduces a new warning on arm64 with CONFIG_GUEST_PERF_EVENTS=n.
> 
>   >> arch/arm64/kvm/arm.c:499:15: warning: no previous prototype for function 'kvm_arch_vcpu_get_ip' [-Wmissing-prototypes]
>      unsigned long kvm_arch_vcpu_get_ip(struct kvm_vcpu *vcpu)
> 
> I floated a potential fix[*], but we all lost track of it.  I assume the easiest
> solution at this point is to post a proper patch to go on top?

Right, you could send it as a reply to this thread and Linus could
simply pick it up directly, after he merges.Probably the easiest ...

Thx.

-- 
Regards/Gruss,
    Boris.

SUSE Software Solutions Germany GmbH, GF: Ivo Totev, HRB 36809, AG Nürnberg

Re: [GIT PULL] perf/core for v5.17

[pr-tracker-bot]

The pull request you sent on Tue, 11 Jan 2022 18:28:58 +0100:

> git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tags/perf_core_for_v5.17_rc1

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/8e5b0adeea19309c8ce0e3c9119061554973efa9

Thank you!

-- 
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