From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
peterz@infradead.org, alexander.shishkin@linux.intel.com,
jolsa@redhat.com, acme@kernel.org
Cc: Robin Murphy <robin.murphy@arm.com>,
Suzuki Poulose <suzuki.poulose@arm.com>,
James Clark <james.clark@arm.com>, Ingo Molnar <mingo@redhat.com>,
Mark Rutland <mark.rutland@arm.com>,
Namhyung Kim <namhyung@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH V6 0/8] perf: Expand perf_branch_entry
Date: Wed, 29 Jun 2022 10:14:15 +0530 [thread overview]
Message-ID: <fe89ddcc-b8ec-cc21-28f2-b62613139619@arm.com> (raw)
In-Reply-To: <20220610035101.424112-1-anshuman.khandual@arm.com>
On 6/10/22 09:20, Anshuman Khandual wrote:
> Branch Record Buffer Extension (BRBE) implementation on arm64 captures more
> branch type classification which cannot be accommodated in the current perf
> branch record format via perf_branch_entry.type element (4 bit field). Also
> it captures privilege information which does not have a corresponding slot
> in perf_branch_entry. This series expands struct perf_branch_entry, to meet
> both these requirements without breaking the existing user space ABI for
> perf tools.
>
> All architecture specific branch types added via perf_branch_entry.new_type
> field in [PATCH 3/4] will be used in BRBE implementation on arm64 platform
> later on with the following map.
>
> #ifdef CONFIG_ARM64
> #define PERF_BR_FIQ PERF_BR_NEW_ARCH_1
> #define PERF_BR_DEBUG_HALT PERF_BR_NEW_ARCH_2
> #define PERF_BR_DEBUG_EXIT PERF_BR_NEW_ARCH_3
> #define PERF_BR_DEBUG_INST PERF_BR_NEW_ARCH_4
> #define PERF_BR_DEBUG_DATA PERF_BR_NEW_ARCH_5
> #endif
>
> This series applies on v5.19-rc1
>
> perf API
>
> The series being applied
>
> - Clean : tools/perf/check-headers.sh
> - Clean : diff -u tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h
>
> References
>
> - BRBE captured branch record information
>
> https://developer.arm.com/documentation/ddi0601/2021-12/AArch64-Registers/BRBINF-n--EL1--Branch-Record-Buffer-Information-Register--n-?lang=en
>
> - BRBE based perf branch stack implementation on arm64 platform
>
> https://lore.kernel.org/all/1642998653-21377-1-git-send-email-anshuman.khandual@arm.com/
>
> Changes in V6:
>
> - Process PERF_BR_EXTEND_ABI in perf tools and fetch from perf_branch_entry.new_type
> - Modified the commit message for [PATCH 1/8]
Any updates on this series ?
next prev parent reply other threads:[~2022-06-29 4:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-10 3:50 Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 1/8] perf: Add system error and not in transaction branch types Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 2/8] perf: Extend branch type classification Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 3/8] perf: Capture branch privilege information Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 4/8] perf: Add PERF_BR_NEW_ARCH_[N] map for BRBE on arm64 platform Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 5/8] perf/tools: Add system error and not in transaction branch types Anshuman Khandual
2022-06-10 3:50 ` [PATCH V6 6/8] perf/tools: Extend branch type classification Anshuman Khandual
2022-06-14 16:53 ` German Gomez
2022-06-15 3:21 ` Anshuman Khandual
2022-06-15 13:39 ` German Gomez
2022-06-10 3:51 ` [PATCH V6 7/8] perf/tools: Add branch privilege information request flag Anshuman Khandual
2022-06-10 3:51 ` [PATCH V6 8/8] perf/tools: Add PERF_BR_NEW_ARCH_[N] map for BRBE on arm64 platform Anshuman Khandual
2022-06-13 9:06 ` [PATCH V6 0/8] perf: Expand perf_branch_entry Anshuman Khandual
2022-06-29 4:44 ` Anshuman Khandual [this message]
2022-07-13 5:40 ` Anshuman Khandual
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