From: Catalin Marinas <catalin.marinas@arm.com>
To: George Pee <georgepee@gmail.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
Russell King <linux@armlinux.org.uk>,
"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
"Kirill A. Shutemov" <kirill.shtuemov@linux.intel.com>,
Austin Kim <austindh.kim@gmail.com>,
Ard Biesheuvel <ardb@kernel.org>, Mike Rapoport <rppt@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Report support for optional ARMv8.2 half-precision floating point extension
Date: Fri, 9 Sep 2022 15:07:04 +0100 [thread overview]
Message-ID: <YxtIiBvAGs2vAl1P@arm.com> (raw)
In-Reply-To: <CAKj0CMv1EY5YCeQ4G6PnGP=XfELJkkN5BaN8W1TGe0fOTXfJBw@mail.gmail.com>
On Fri, Sep 09, 2022 at 08:34:26AM -0500, George Pee wrote:
> Adding the hwcap was part of the diagnosis process-- I added it just
> to make sure that the cpu in question supported the optional
> extension.
> It seems like it could be useful to be able to check for support in
> /proc/cpuinfo.
Ah, I wasn't aware that the feature doesn't work on arm32. I don't think
it makes sense to expose a hwcap bit to user in this case.
--
Catalin
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WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: George Pee <georgepee@gmail.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
Russell King <linux@armlinux.org.uk>,
"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
"Kirill A. Shutemov" <kirill.shtuemov@linux.intel.com>,
Austin Kim <austindh.kim@gmail.com>,
Ard Biesheuvel <ardb@kernel.org>, Mike Rapoport <rppt@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Report support for optional ARMv8.2 half-precision floating point extension
Date: Fri, 9 Sep 2022 15:07:04 +0100 [thread overview]
Message-ID: <YxtIiBvAGs2vAl1P@arm.com> (raw)
In-Reply-To: <CAKj0CMv1EY5YCeQ4G6PnGP=XfELJkkN5BaN8W1TGe0fOTXfJBw@mail.gmail.com>
On Fri, Sep 09, 2022 at 08:34:26AM -0500, George Pee wrote:
> Adding the hwcap was part of the diagnosis process-- I added it just
> to make sure that the cpu in question supported the optional
> extension.
> It seems like it could be useful to be able to check for support in
> /proc/cpuinfo.
Ah, I wasn't aware that the feature doesn't work on arm32. I don't think
it makes sense to expose a hwcap bit to user in this case.
--
Catalin
next prev parent reply other threads:[~2022-09-09 14:08 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 14:13 [PATCH] Report support for optional ARMv8.2 half-precision floating point extension george pee
2022-09-01 14:13 ` george pee
2022-09-09 11:39 ` Catalin Marinas
2022-09-09 11:39 ` Catalin Marinas
2022-09-09 13:35 ` George Pee
2022-09-09 13:35 ` George Pee
2022-09-09 12:46 ` Robin Murphy
2022-09-09 12:46 ` Robin Murphy
2022-09-09 13:34 ` George Pee
2022-09-09 13:34 ` George Pee
2022-09-09 14:07 ` Catalin Marinas [this message]
2022-09-09 14:07 ` Catalin Marinas
2022-09-09 14:57 ` George Pee
2022-09-09 14:57 ` George Pee
2022-09-09 15:05 ` Catalin Marinas
2022-09-09 15:05 ` Catalin Marinas
2022-09-12 13:05 ` Russell King (Oracle)
2022-09-12 13:05 ` Russell King (Oracle)
2022-09-12 18:09 ` George Pee
2022-09-12 18:09 ` George Pee
2022-09-09 14:17 ` Robin Murphy
2022-09-09 14:17 ` Robin Murphy
2022-09-09 14:54 ` George Pee
2022-09-09 14:54 ` George Pee
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