From: Rongwei Wang <rongwei.wang@linux.alibaba.com>
To: Borislav Petkov <bp@alien8.de>
Cc: catalin.marinas@arm.com, Will Deacon <will@kernel.org>,
bjorn.andersson@linaro.org, shawnguo@kernel.org,
vkoul@kernel.org, geert+renesas@glider.be, Anson.Huang@nxp.com,
michael@walle.cc, krzk@kernel.org, olof@lixom.net,
vincenzo.frascino@arm.com, ardb@kernel.org, masahiroy@kernel.org,
gshan@redhat.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] arm64:msr: Add MSR driver
Date: Tue, 1 Dec 2020 23:17:39 +0800 [thread overview]
Message-ID: <8ED75067-DB02-4502-BA03-45B3519E408A@linux.alibaba.com> (raw)
In-Reply-To: <20201201145415.GC22927@zn.tnic>
> 2020年12月1日 下午10:54，Borislav Petkov <bp@alien8.de> 写道：
>
> On Tue, Dec 01, 2020 at 10:33:42PM +0800, wangrongwei wrote:
>> Yes, and x86 also provides two instructions with the same name in the
>> instruction set, but not in ARM.
>
> Sorry, I can't parse what you're trying to say here.
In the ARM architecture, there are no rdmsr and wrmsr instructions.
In ARM, the system registers can only be accessed through msr and mrs, so the problem created by MSR driver (depend on rdmsr and wrmsr) in x86 is not necessarily present in ARM, which is very different from x86.
In addition, we want cross-platform compatabilities, and fill these gaps in the ARM.
>
> --
> Regards/Gruss,
> Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette
Regards,
Rongwei Wang.
next prev parent reply other threads:[~2020-12-01 15:18 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-30 17:48 Rongwei Wang
2020-11-30 17:48 ` [PATCH 1/3] arm64:insn: Export symbols for MSR ARM driver Rongwei Wang
2020-11-30 17:48 ` [PATCH 2/3] arm64:msr: Introduce " Rongwei Wang
2020-11-30 17:48 ` [PATCH 3/3] arm64:msr: Enable " Rongwei Wang
2020-11-30 17:57 ` [PATCH 0/3] arm64:msr: Add MSR driver Will Deacon
2020-12-01 2:55 ` wangrongwei
2020-12-01 5:44 ` wangrongwei
2020-11-30 18:05 ` Marc Zyngier
2020-11-30 18:20 ` Randy Dunlap
2020-12-01 3:09 ` wangrongwei
2020-12-01 8:12 ` Marc Zyngier
2020-12-01 14:25 ` wangrongwei
2020-12-01 15:37 ` Marc Zyngier
2020-12-03 5:45 ` Rongwei Wang
2020-12-03 8:35 ` Marc Zyngier
2020-12-03 11:25 ` Rongwei Wang
2020-12-03 11:45 ` Marc Zyngier
2020-12-03 12:22 ` Rongwei Wang
2020-12-03 11:50 ` Mark Rutland
2020-11-30 19:03 ` Borislav Petkov
2020-12-01 3:44 ` wangrongwei
2020-12-01 11:26 ` Borislav Petkov
2020-12-01 14:33 ` wangrongwei
2020-12-01 14:54 ` Borislav Petkov
2020-12-01 15:17 ` Rongwei Wang [this message]
2020-12-01 15:25 ` Borislav Petkov
2020-12-03 2:09 ` Rongwei Wang
2020-12-01 15:26 ` Ard Biesheuvel
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