From mboxrd@z Thu Jan 1 00:00:00 1970 From: leo.yan@linaro.org (Leo Yan) Date: Thu, 18 May 2017 21:01:30 +0800 Subject: [PATCH] arm64: cpufeature: check translation granule size based on kernel config In-Reply-To: <9db90634-6bb1-23e0-5cc8-19c02eceac04@arm.com> References: <1495102873-10858-1-git-send-email-leo.yan@linaro.org> <20170518113627.GC25294@leoy-ThinkPad-T440> <9db90634-6bb1-23e0-5cc8-19c02eceac04@arm.com> Message-ID: <20170518130130.GD25294@leoy-ThinkPad-T440> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, May 18, 2017 at 01:39:12PM +0100, Suzuki K Poulose wrote: [...] > >>If we were to suppress the warning (more on that below), we could simply > >>make this feature a NON_STRICT, since the unsupported CPUs won't boot > >>with 16K to hit this sanity check. > >> > >>However, there is a problem with disabling this warning. If a VM starts > >>using 16KB page size on a 4K/64K host, the VM could end up in unknown > >>failures when it switches to an unsupported CPU (after it has booted). > >>Of course the real fix lies in making the KVM exposing the safe value > >>for granule support to the VCPUs (which is currently being worked on by > >>Douglas in Cc). So, when we have that ready, we could make it NON_STRICT > >>instead of this approach. > > > >Thanks for the info :) > > > >I will use below patch for production branch temporarily. You could > > Which production branch do you mean above ? Is it something in your intenral > repository ? Yeah, I mean Hikey960 branch. Thanks, Leo Yan