Hi Catalin, > -----Original Message----- > From: linux-arm-kernel > [mailto:[email protected]] On Behalf Of > Catalin Marinas > Sent: Saturday, January 26, 2019 3:08 AM > To: Zhang, Lei/張 雷 > Cc: 'Mark Rutland'; '[email protected]'; > '[email protected]'; > '[email protected]' > Subject: Re: [PATCH v2 1/1] arm64: Add workaround for Fujitsu A64FX > erratum 010001 > > IIUC, this can happen very early when the errata framework isn't yet > ready. Given that this is not on a fast path (you already took a fault), > I don't think it's worth optimising for cpus_have_cap() (and > ARM64_WORKAROUND_FUJITSU_A64FX_0100001). I've seen Mark's comments on > why checking MIDR in a preemptible context is not a good idea but I > suspect your platform is homogeneous (i.e. not big.LITTLE). Thanks for comment. I will post a new patch to resolve fast path problem in today. By the way our platform is homogeneous.
Best Regards, Lei Zhang [email protected]
