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Mon, 20 Jan 2020 14:01:52 +0000 MIME-Version: 1.0 Date: Mon, 20 Jan 2020 14:01:52 +0000 From: Marc Zyngier To: Vladimir Murzin Subject: Re: [PATCH v2] ARM: virt: Relax arch timer version check during early boot In-Reply-To: <1579527498-31081-1-git-send-email-vladimir.murzin@arm.com> References: <1579527498-31081-1-git-send-email-vladimir.murzin@arm.com> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.8 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: vladimir.murzin@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200120_060158_855052_854F0B13 X-CRM114-Status: GOOD ( 12.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2020-01-20 13:38, Vladimir Murzin wrote: > Updates to the Generic Timer architecture allow ID_PFR1.GenTimer to > have values other than 0 or 1 while still preserving backward > compatibility. At the moment, Linux is quite strict in the way it > handles this field at early boot and will not configure arch timer if > it doesn't find the value 1. > > Since here use ubfx for arch timer version extraction (hyb-stub build > with -march=armv7-a, so it is safe) > > To help backports (even though the code was correct at the time of > writing) > Fixes: 8ec58be9f3ff ("ARM: virt: arch_timers: enable access to physical > timers") > Signed-off-by: Vladimir Murzin Acked-by: Marc Zyngier Feel free to put it into Russell's patch system. Thanks, M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel