From: "Alex Bennée" <alex.bennee@linaro.org>
To: Dave Martin <Dave.Martin@arm.com>
Cc: linux-kernel@vger.kernel.org, "Andrew Jones" <drjones@redhat.com>,
"Arnd Bergmann" <arnd@arndb.de>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Eugene Syromiatnikov" <esyr@redhat.com>,
"Florian Weimer" <fweimer@redhat.com>,
"H.J. Lu" <hjl.tools@gmail.com>, "Jann Horn" <jannh@google.com>,
"Kees Cook" <keescook@chromium.org>,
"Kristina Martšenko" <kristina.martsenko@arm.com>,
"Mark Brown" <broonie@kernel.org>,
"Paul Elliott" <paul.elliott@arm.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Sudakshina Das" <sudi.das@arm.com>,
"Szabolcs Nagy" <szabolcs.nagy@arm.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Will Deacon" <will.deacon@arm.com>,
"Yu-cheng Yu" <yu-cheng.yu@intel.com>,
"Amit Kachhap" <amit.kachhap@arm.com>,
"Vincenzo Frascino" <vincenzo.frascino@arm.com>,
linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 04/12] arm64: docs: cpu-feature-registers: Document ID_AA64PFR1_EL1
Date: Fri, 11 Oct 2019 14:19:48 +0100 [thread overview]
Message-ID: <87zhi7l8qz.fsf@linaro.org> (raw)
In-Reply-To: <1570733080-21015-5-git-send-email-Dave.Martin@arm.com>
Dave Martin <Dave.Martin@arm.com> writes:
> Commit d71be2b6c0e1 ("arm64: cpufeature: Detect SSBS and advertise
> to userspace") exposes ID_AA64PFR1_EL1 to userspace, but didn't
> update the documentation to match.
>
> Add it.
>
> Signed-off-by: Dave Martin <Dave.Martin@arm.com>
>
> ---
>
> Note to maintainers:
>
> * This patch has been racing with various other attempts to fix
> the same documentation in the meantime.
>
> Since this patch only fixes the documenting for pre-existing
> features, it can safely be dropped if appropriate.
>
> The _new_ documentation relating to BTI feature reporting
> is in a subsequent patch, and needs to be retained.
> ---
> Documentation/arm64/cpu-feature-registers.rst | 15 +++++++++++----
> 1 file changed, 11 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/arm64/cpu-feature-registers.rst b/Documentation/arm64/cpu-feature-registers.rst
> index 2955287..b86828f 100644
> --- a/Documentation/arm64/cpu-feature-registers.rst
> +++ b/Documentation/arm64/cpu-feature-registers.rst
> @@ -168,8 +168,15 @@ infrastructure:
> +------------------------------+---------+---------+
>
>
> - 3) MIDR_EL1 - Main ID Register
> + 3) ID_AA64PFR1_EL1 - Processor Feature Register 1
> + +------------------------------+---------+---------+
> + | Name | bits | visible |
> + +------------------------------+---------+---------+
> + | SSBS | [7-4] | y |
> + +------------------------------+---------+---------+
> +
>
> + 4) MIDR_EL1 - Main ID Register
> +------------------------------+---------+---------+
> | Name | bits | visible |
> +------------------------------+---------+---------+
> @@ -188,7 +195,7 @@ infrastructure:
> as available on the CPU where it is fetched and is not a system
> wide safe value.
>
> - 4) ID_AA64ISAR1_EL1 - Instruction set attribute register 1
> + 5) ID_AA64ISAR1_EL1 - Instruction set attribute register 1
If I'm not mistaken .rst has support for auto-enumeration if the #
character is used. That might reduce the pain of re-numbering in future.
>
> +------------------------------+---------+---------+
> | Name | bits | visible |
> @@ -210,7 +217,7 @@ infrastructure:
> | DPB | [3-0] | y |
> +------------------------------+---------+---------+
>
> - 5) ID_AA64MMFR2_EL1 - Memory model feature register 2
> + 6) ID_AA64MMFR2_EL1 - Memory model feature register 2
>
> +------------------------------+---------+---------+
> | Name | bits | visible |
> @@ -218,7 +225,7 @@ infrastructure:
> | AT | [35-32] | y |
> +------------------------------+---------+---------+
>
> - 6) ID_AA64ZFR0_EL1 - SVE feature ID register 0
> + 7) ID_AA64ZFR0_EL1 - SVE feature ID register 0
>
> +------------------------------+---------+---------+
> | Name | bits | visible |
--
Alex Bennée
next prev parent reply other threads:[~2019-10-11 13:19 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-10 18:44 [PATCH v2 00/12] arm64: ARMv8.5-A: Branch Target Identification support Dave Martin
2019-10-10 18:44 ` [PATCH v2 01/12] ELF: UAPI and Kconfig additions for ELF program properties Dave Martin
2019-10-10 18:44 ` [PATCH v2 02/12] ELF: Add ELF program property parsing support Dave Martin
2019-10-10 18:44 ` [PATCH v2 03/12] mm: Reserve asm-generic prot flag 0x10 for arch use Dave Martin
2019-10-10 18:44 ` [PATCH v2 04/12] arm64: docs: cpu-feature-registers: Document ID_AA64PFR1_EL1 Dave Martin
2019-10-11 13:19 ` Alex Bennée [this message]
2019-10-11 14:51 ` Dave Martin
2019-10-21 19:18 ` Mark Brown
2019-10-22 10:32 ` Will Deacon
2019-10-10 18:44 ` [PATCH v2 05/12] arm64: Basic Branch Target Identification support Dave Martin
2019-10-11 15:06 ` [FIXUP 0/2] Fixups to patch 5 Dave Martin
2019-10-11 15:06 ` [FIXUP 1/2] squash! arm64: Basic Branch Target Identification support Dave Martin
2019-10-11 15:06 ` [FIXUP 2/2] " Dave Martin
2019-10-11 15:10 ` [PATCH v2 05/12] " Mark Rutland
2019-10-11 15:25 ` Richard Henderson
2019-10-11 15:32 ` Dave Martin
2019-10-11 15:40 ` Mark Rutland
2019-10-11 15:44 ` Dave Martin
2019-10-11 16:01 ` Dave Martin
2019-10-11 16:42 ` Dave Martin
2019-10-18 11:05 ` Mark Rutland
2019-10-18 13:36 ` Dave Martin
2019-10-11 17:20 ` Dave Martin
2019-10-18 11:10 ` Mark Rutland
2019-10-18 13:37 ` Dave Martin
2019-10-18 11:16 ` Mark Rutland
2019-10-18 13:40 ` Dave Martin
2019-10-10 18:44 ` [PATCH v2 06/12] elf: Allow arch to tweak initial mmap prot flags Dave Martin
2019-10-10 18:44 ` [PATCH v2 07/12] arm64: elf: Enable BTI at exec based on ELF program properties Dave Martin
2019-10-10 18:44 ` [PATCH v2 08/12] arm64: BTI: Decode BYTPE bits when printing PSTATE Dave Martin
2019-10-11 15:31 ` Richard Henderson
2019-10-11 15:33 ` Dave Martin
2019-10-10 18:44 ` [PATCH v2 09/12] arm64: traps: Fix inconsistent faulting instruction skipping Dave Martin
2019-10-11 15:24 ` Mark Rutland
2019-10-15 15:21 ` Dave Martin
2019-10-15 16:42 ` Mark Rutland
2019-10-15 16:49 ` Dave Martin
2019-10-18 16:40 ` Dave Martin
2019-10-22 11:09 ` Robin Murphy
2019-10-10 18:44 ` [PATCH v2 10/12] arm64: traps: Shuffle code to eliminate forward declarations Dave Martin
2019-10-10 18:44 ` [PATCH v2 11/12] arm64: BTI: Reset BTYPE when skipping emulated instructions Dave Martin
2019-10-11 14:21 ` Mark Rutland
2019-10-11 14:47 ` Dave Martin
2019-10-18 11:04 ` Mark Rutland
2019-10-18 14:49 ` Dave Martin
2019-10-10 18:44 ` [PATCH v2 12/12] KVM: " Dave Martin
2019-10-11 14:24 ` Mark Rutland
2019-10-11 14:44 ` Dave Martin
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