From: Peter Zijlstra <peterz@infradead.org>
To: Sean Christopherson <seanjc@google.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>, Guo Ren <guoren@kernel.org>,
Nick Hu <nickhu@andestech.com>, Greentime Hu <green.hu@gmail.com>,
Vincent Chen <deanbo422@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Stefano Stabellini <sstabellini@kernel.org>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-csky@vger.kernel.org,
linux-riscv@lists.infradead.org, kvm@vger.kernel.org,
xen-devel@lists.xenproject.org,
Artem Kashkanov <artem.kashkanov@intel.com>,
Like Xu <like.xu.linux@gmail.com>,
Zhu Lingshan <lingshan.zhu@intel.com>
Subject: Re: [PATCH v2 01/13] perf: Ensure perf_guest_cbs aren't reloaded between !NULL check and deref
Date: Sat, 28 Aug 2021 21:44:21 +0200 [thread overview]
Message-ID: <20210828194421.GB4353@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20210828003558.713983-2-seanjc@google.com>
On Fri, Aug 27, 2021 at 05:35:46PM -0700, Sean Christopherson wrote:
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 2d510ad750ed..6b0405e578c1 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -1237,6 +1237,14 @@ extern void perf_event_bpf_event(struct bpf_prog *prog,
> u16 flags);
>
> extern struct perf_guest_info_callbacks *perf_guest_cbs;
> +static inline struct perf_guest_info_callbacks *perf_get_guest_cbs(void)
> +{
> + /* Reg/unreg perf_guest_cbs waits for readers via synchronize_rcu(). */
> + lockdep_assert_preemption_disabled();
> +
> + /* Prevent reloading between a !NULL check and dereferences. */
> + return READ_ONCE(perf_guest_cbs);
> +}
Nice..
> extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
> extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
>
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 464917096e73..2126f6327321 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -6491,14 +6491,19 @@ struct perf_guest_info_callbacks *perf_guest_cbs;
>
> int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
> {
> - perf_guest_cbs = cbs;
> + if (WARN_ON_ONCE(perf_guest_cbs))
> + return -EBUSY;
> +
> + WRITE_ONCE(perf_guest_cbs, cbs);
> + synchronize_rcu();
You're waiting for all NULL users to go away? :-) IOW, we can do without
this synchronize_rcu() call.
> return 0;
> }
> EXPORT_SYMBOL_GPL(perf_register_guest_info_callbacks);
>
> int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
> {
> - perf_guest_cbs = NULL;
if (WARN_ON_ONCE(perf_guest_cbs != cbs))
return -EBUSY;
?
> + WRITE_ONCE(perf_guest_cbs, NULL);
> + synchronize_rcu();
> return 0;
> }
> EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);
Yes, this ought to work fine.
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Sean Christopherson <seanjc@google.com>
Cc: Wanpeng Li <wanpengli@tencent.com>,
kvm@vger.kernel.org,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Guo Ren <guoren@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
linux-riscv@lists.infradead.org,
Vincent Chen <deanbo422@gmail.com>, Jiri Olsa <jolsa@redhat.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Stefano Stabellini <sstabellini@kernel.org>,
xen-devel@lists.xenproject.org, Marc Zyngier <maz@kernel.org>,
Joerg Roedel <joro@8bytes.org>,
x86@kernel.org, linux-csky@vger.kernel.org,
kvmarm@lists.cs.columbia.edu, Ingo Molnar <mingo@redhat.com>,
Like Xu <like.xu.linux@gmail.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Zhu Lingshan <lingshan.zhu@intel.com>,
Will Deacon <will@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Borislav Petkov <bp@alien8.de>, Greentime Hu <green.hu@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Namhyung Kim <namhyung@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Artem Kashkanov <artem.kashkanov@intel.com>,
linux-arm-kernel@lists.infradead.org,
Jim Mattson <jmattson@google.com>,
Juergen Gross <jgross@suse.com>, Nick Hu <nickhu@andestech.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Palmer Dabbelt <palmer@dabbelt.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>
Subject: Re: [PATCH v2 01/13] perf: Ensure perf_guest_cbs aren't reloaded between !NULL check and deref
Date: Sat, 28 Aug 2021 21:44:21 +0200 [thread overview]
Message-ID: <20210828194421.GB4353@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20210828003558.713983-2-seanjc@google.com>
On Fri, Aug 27, 2021 at 05:35:46PM -0700, Sean Christopherson wrote:
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 2d510ad750ed..6b0405e578c1 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -1237,6 +1237,14 @@ extern void perf_event_bpf_event(struct bpf_prog *prog,
> u16 flags);
>
> extern struct perf_guest_info_callbacks *perf_guest_cbs;
> +static inline struct perf_guest_info_callbacks *perf_get_guest_cbs(void)
> +{
> + /* Reg/unreg perf_guest_cbs waits for readers via synchronize_rcu(). */
> + lockdep_assert_preemption_disabled();
> +
> + /* Prevent reloading between a !NULL check and dereferences. */
> + return READ_ONCE(perf_guest_cbs);
> +}
Nice..
> extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
> extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
>
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 464917096e73..2126f6327321 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -6491,14 +6491,19 @@ struct perf_guest_info_callbacks *perf_guest_cbs;
>
> int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
> {
> - perf_guest_cbs = cbs;
> + if (WARN_ON_ONCE(perf_guest_cbs))
> + return -EBUSY;
> +
> + WRITE_ONCE(perf_guest_cbs, cbs);
> + synchronize_rcu();
You're waiting for all NULL users to go away? :-) IOW, we can do without
this synchronize_rcu() call.
> return 0;
> }
> EXPORT_SYMBOL_GPL(perf_register_guest_info_callbacks);
>
> int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
> {
> - perf_guest_cbs = NULL;
if (WARN_ON_ONCE(perf_guest_cbs != cbs))
return -EBUSY;
?
> + WRITE_ONCE(perf_guest_cbs, NULL);
> + synchronize_rcu();
> return 0;
> }
> EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);
Yes, this ought to work fine.
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Sean Christopherson <seanjc@google.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>, Guo Ren <guoren@kernel.org>,
Nick Hu <nickhu@andestech.com>, Greentime Hu <green.hu@gmail.com>,
Vincent Chen <deanbo422@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Stefano Stabellini <sstabellini@kernel.org>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-csky@vger.kernel.org,
linux-riscv@lists.infradead.org, kvm@vger.kernel.org,
xen-devel@lists.xenproject.org,
Artem Kashkanov <artem.kashkanov@intel.com>,
Like Xu <like.xu.linux@gmail.com>,
Zhu Lingshan <lingshan.zhu@intel.com>
Subject: Re: [PATCH v2 01/13] perf: Ensure perf_guest_cbs aren't reloaded between !NULL check and deref
Date: Sat, 28 Aug 2021 21:44:21 +0200 [thread overview]
Message-ID: <20210828194421.GB4353@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20210828003558.713983-2-seanjc@google.com>
On Fri, Aug 27, 2021 at 05:35:46PM -0700, Sean Christopherson wrote:
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 2d510ad750ed..6b0405e578c1 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -1237,6 +1237,14 @@ extern void perf_event_bpf_event(struct bpf_prog *prog,
> u16 flags);
>
> extern struct perf_guest_info_callbacks *perf_guest_cbs;
> +static inline struct perf_guest_info_callbacks *perf_get_guest_cbs(void)
> +{
> + /* Reg/unreg perf_guest_cbs waits for readers via synchronize_rcu(). */
> + lockdep_assert_preemption_disabled();
> +
> + /* Prevent reloading between a !NULL check and dereferences. */
> + return READ_ONCE(perf_guest_cbs);
> +}
Nice..
> extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
> extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
>
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 464917096e73..2126f6327321 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -6491,14 +6491,19 @@ struct perf_guest_info_callbacks *perf_guest_cbs;
>
> int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
> {
> - perf_guest_cbs = cbs;
> + if (WARN_ON_ONCE(perf_guest_cbs))
> + return -EBUSY;
> +
> + WRITE_ONCE(perf_guest_cbs, cbs);
> + synchronize_rcu();
You're waiting for all NULL users to go away? :-) IOW, we can do without
this synchronize_rcu() call.
> return 0;
> }
> EXPORT_SYMBOL_GPL(perf_register_guest_info_callbacks);
>
> int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
> {
> - perf_guest_cbs = NULL;
if (WARN_ON_ONCE(perf_guest_cbs != cbs))
return -EBUSY;
?
> + WRITE_ONCE(perf_guest_cbs, NULL);
> + synchronize_rcu();
> return 0;
> }
> EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);
Yes, this ought to work fine.
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: Sean Christopherson <seanjc@google.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>, Guo Ren <guoren@kernel.org>,
Nick Hu <nickhu@andestech.com>, Greentime Hu <green.hu@gmail.com>,
Vincent Chen <deanbo422@gmail.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Stefano Stabellini <sstabellini@kernel.org>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-csky@vger.kernel.org,
linux-riscv@lists.infradead.org, kvm@vger.kernel.org,
xen-devel@lists.xenproject.org,
Artem Kashkanov <artem.kashkanov@intel.com>,
Like Xu <like.xu.linux@gmail.com>,
Zhu Lingshan <lingshan.zhu@intel.com>
Subject: Re: [PATCH v2 01/13] perf: Ensure perf_guest_cbs aren't reloaded between !NULL check and deref
Date: Sat, 28 Aug 2021 21:44:21 +0200 [thread overview]
Message-ID: <20210828194421.GB4353@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20210828003558.713983-2-seanjc@google.com>
On Fri, Aug 27, 2021 at 05:35:46PM -0700, Sean Christopherson wrote:
> diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
> index 2d510ad750ed..6b0405e578c1 100644
> --- a/include/linux/perf_event.h
> +++ b/include/linux/perf_event.h
> @@ -1237,6 +1237,14 @@ extern void perf_event_bpf_event(struct bpf_prog *prog,
> u16 flags);
>
> extern struct perf_guest_info_callbacks *perf_guest_cbs;
> +static inline struct perf_guest_info_callbacks *perf_get_guest_cbs(void)
> +{
> + /* Reg/unreg perf_guest_cbs waits for readers via synchronize_rcu(). */
> + lockdep_assert_preemption_disabled();
> +
> + /* Prevent reloading between a !NULL check and dereferences. */
> + return READ_ONCE(perf_guest_cbs);
> +}
Nice..
> extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
> extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);
>
> diff --git a/kernel/events/core.c b/kernel/events/core.c
> index 464917096e73..2126f6327321 100644
> --- a/kernel/events/core.c
> +++ b/kernel/events/core.c
> @@ -6491,14 +6491,19 @@ struct perf_guest_info_callbacks *perf_guest_cbs;
>
> int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
> {
> - perf_guest_cbs = cbs;
> + if (WARN_ON_ONCE(perf_guest_cbs))
> + return -EBUSY;
> +
> + WRITE_ONCE(perf_guest_cbs, cbs);
> + synchronize_rcu();
You're waiting for all NULL users to go away? :-) IOW, we can do without
this synchronize_rcu() call.
> return 0;
> }
> EXPORT_SYMBOL_GPL(perf_register_guest_info_callbacks);
>
> int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks *cbs)
> {
> - perf_guest_cbs = NULL;
if (WARN_ON_ONCE(perf_guest_cbs != cbs))
return -EBUSY;
?
> + WRITE_ONCE(perf_guest_cbs, NULL);
> + synchronize_rcu();
> return 0;
> }
> EXPORT_SYMBOL_GPL(perf_unregister_guest_info_callbacks);
Yes, this ought to work fine.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-08-28 19:45 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-28 0:35 [PATCH v2 00/13] perf: KVM: Fix, optimize, and clean up callbacks Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 01/13] perf: Ensure perf_guest_cbs aren't reloaded between !NULL check and deref Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 19:44 ` Peter Zijlstra [this message]
2021-08-28 19:44 ` Peter Zijlstra
2021-08-28 19:44 ` Peter Zijlstra
2021-08-28 19:44 ` Peter Zijlstra
2021-09-16 21:41 ` Sean Christopherson
2021-09-16 21:41 ` Sean Christopherson
2021-09-16 21:41 ` Sean Christopherson
2021-09-16 21:41 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 02/13] KVM: x86: Register perf callbacks after calling vendor's hardware_setup() Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 03/13] KVM: x86: Register Processor Trace interrupt hook iff PT enabled in guest Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 04/13] perf: Stop pretending that perf can handle multiple guest callbacks Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 05/13] perf: Force architectures to opt-in to " Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 19:47 ` Peter Zijlstra
2021-08-28 19:47 ` Peter Zijlstra
2021-08-28 19:47 ` Peter Zijlstra
2021-08-28 19:47 ` Peter Zijlstra
2021-09-16 22:30 ` Sean Christopherson
2021-09-16 22:30 ` Sean Christopherson
2021-09-16 22:30 ` Sean Christopherson
2021-09-16 22:30 ` Sean Christopherson
2021-09-21 16:44 ` Paolo Bonzini
2021-09-21 16:44 ` Paolo Bonzini
2021-09-21 16:44 ` Paolo Bonzini
2021-09-21 16:44 ` Paolo Bonzini
2021-09-21 21:29 ` Sean Christopherson
2021-09-21 21:29 ` Sean Christopherson
2021-09-21 21:29 ` Sean Christopherson
2021-09-21 21:29 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 06/13] perf/core: Rework guest callbacks to prepare for static_call support Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 07/13] perf/core: Use static_call to optimize perf_guest_info_callbacks Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 08/13] KVM: x86: Drop current_vcpu for kvm_running_vcpu + kvm_arch_vcpu variable Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 09/13] KVM: x86: More precisely identify NMI from guest when handling PMI Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 10/13] KVM: Move x86's perf guest info callbacks to generic KVM Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 11/13] KVM: x86: Move Intel Processor Trace interrupt handler to vmx.c Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 12/13] KVM: arm64: Convert to the generic perf callbacks Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` [PATCH v2 13/13] KVM: arm64: Drop perf.c and fold its tiny bits of code into arm.c / pmu.c Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 0:35 ` Sean Christopherson
2021-08-28 20:13 ` [PATCH v2 00/13] perf: KVM: Fix, optimize, and clean up callbacks Peter Zijlstra
2021-08-28 20:13 ` Peter Zijlstra
2021-08-28 20:13 ` Peter Zijlstra
2021-08-28 20:13 ` Peter Zijlstra
2021-09-16 21:37 ` Sean Christopherson
2021-09-16 21:37 ` Sean Christopherson
2021-09-16 21:37 ` Sean Christopherson
2021-09-16 21:37 ` Sean Christopherson
2021-09-17 7:28 ` Peter Zijlstra
2021-09-17 7:28 ` Peter Zijlstra
2021-09-17 7:28 ` Peter Zijlstra
2021-09-17 7:28 ` Peter Zijlstra
2021-09-17 16:53 ` Sean Christopherson
2021-09-17 16:53 ` Sean Christopherson
2021-09-17 16:53 ` Sean Christopherson
2021-09-17 16:53 ` Sean Christopherson
2021-09-20 12:05 ` Paolo Bonzini
2021-09-20 12:05 ` Paolo Bonzini
2021-09-20 12:05 ` Paolo Bonzini
2021-09-20 12:05 ` Paolo Bonzini
2021-09-20 12:22 ` Marc Zyngier
2021-09-20 12:22 ` Marc Zyngier
2021-09-20 12:22 ` Marc Zyngier
2021-09-20 12:22 ` Marc Zyngier
2021-09-20 13:18 ` Paolo Bonzini
2021-09-20 13:18 ` Paolo Bonzini
2021-09-20 13:18 ` Paolo Bonzini
2021-09-20 13:18 ` Paolo Bonzini
2021-09-20 13:40 ` Marc Zyngier
2021-09-20 13:40 ` Marc Zyngier
2021-09-20 13:40 ` Marc Zyngier
2021-09-20 13:40 ` Marc Zyngier
2021-09-20 18:22 ` Paolo Bonzini
2021-09-20 18:22 ` Paolo Bonzini
2021-09-20 18:22 ` Paolo Bonzini
2021-09-20 18:22 ` Paolo Bonzini
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