From: "Justin He (Arm Technology China)" <Justin.He@arm.com>
To: Catalin Marinas <Catalin.Marinas@arm.com>
Cc: "Mark Rutland" <Mark.Rutland@arm.com>,
"Kaly Xin (Arm Technology China)" <Kaly.Xin@arm.com>,
"Ralph Campbell" <rcampbell@nvidia.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Suzuki Poulose" <Suzuki.Poulose@arm.com>,
"Marc Zyngier" <maz@kernel.org>,
"Anshuman Khandual" <Anshuman.Khandual@arm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Matthew Wilcox" <willy@infradead.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"Jérôme Glisse" <jglisse@redhat.com>,
"James Morse" <James.Morse@arm.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"Punit Agrawal" <punitagrawal@gmail.com>,
"hejianet@gmail.com" <hejianet@gmail.com>,
"Thomas Gleixner" <tglx@linutronix.de>, nd <nd@arm.com>,
"Will Deacon" <will@kernel.org>,
"Alex Van Brunt" <avanbrunt@nvidia.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
"Robin Murphy" <Robin.Murphy@arm.com>
Subject: RE: [PATCH v9 1/3] arm64: cpufeature: introduce helper cpu_has_hw_af()
Date: Thu, 26 Sep 2019 09:23:18 +0000 [thread overview]
Message-ID: <DB7PR08MB3082A688BDDD95F179EA388EF7860@DB7PR08MB3082.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <20190925143820.GF7042@arrakis.emea.arm.com>
Hi Catalin
> -----Original Message-----
> From: Catalin Marinas <catalin.marinas@arm.com>
> Sent: 2019年9月25日 22:38
> To: Justin He (Arm Technology China) <Justin.He@arm.com>
> Cc: Will Deacon <will@kernel.org>; Mark Rutland
> <Mark.Rutland@arm.com>; James Morse <James.Morse@arm.com>; Marc
> Zyngier <maz@kernel.org>; Matthew Wilcox <willy@infradead.org>; Kirill A.
> Shutemov <kirill.shutemov@linux.intel.com>; linux-arm-
> kernel@lists.infradead.org; linux-kernel@vger.kernel.org; linux-
> mm@kvack.org; Suzuki Poulose <Suzuki.Poulose@arm.com>; Punit
> Agrawal <punitagrawal@gmail.com>; Anshuman Khandual
> <Anshuman.Khandual@arm.com>; Alex Van Brunt
> <avanbrunt@nvidia.com>; Robin Murphy <Robin.Murphy@arm.com>;
> Thomas Gleixner <tglx@linutronix.de>; Andrew Morton <akpm@linux-
> foundation.org>; Jérôme Glisse <jglisse@redhat.com>; Ralph Campbell
> <rcampbell@nvidia.com>; hejianet@gmail.com; Kaly Xin (Arm Technology
> China) <Kaly.Xin@arm.com>; nd <nd@arm.com>
> Subject: Re: [PATCH v9 1/3] arm64: cpufeature: introduce helper
> cpu_has_hw_af()
>
> On Wed, Sep 25, 2019 at 10:59:20AM +0800, Jia He wrote:
> > We unconditionally set the HW_AFDBM capability and only enable it on
> > CPUs which really have the feature. But sometimes we need to know
> > whether this cpu has the capability of HW AF. So decouple AF from
> > DBM by new helper cpu_has_hw_af().
> >
> > Signed-off-by: Jia He <justin.he@arm.com>
> > Suggested-by: Suzuki Poulose <Suzuki.Poulose@arm.com>
> > Reported-by: kbuild test robot <lkp@intel.com>
>
> Which bug did the kbuild robot actually report? I'd drop this line.
>
This line is added due to [1]:
"If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>"
Yes, I know your concern, it is a little bit confusing. But I don't know
how to distinguish the case btw a) original bug report b) bug report
of my patch implementation? Thanks for any suggestion.
[1] https://www.lkml.org/lkml/2019/9/18/940
--
Cheers,
Justin (Jia He)
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next prev parent reply other threads:[~2019-09-26 9:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-25 2:59 [PATCH v9 0/3] fix double page fault on arm64 Jia He
2019-09-25 2:59 ` [PATCH v9 1/3] arm64: cpufeature: introduce helper cpu_has_hw_af() Jia He
2019-09-25 14:38 ` Catalin Marinas
2019-09-26 9:23 ` Justin He (Arm Technology China) [this message]
2019-09-25 2:59 ` [PATCH v9 2/3] arm64: mm: implement arch_faults_on_old_pte() on arm64 Jia He
2019-09-25 2:59 ` [PATCH v9 3/3] mm: fix double page fault on arm64 if PTE_AF is cleared Jia He
2019-09-25 3:03 ` Justin He (Arm Technology China)
2019-09-25 14:42 ` Catalin Marinas
2019-09-26 10:25 ` Kirill A. Shutemov
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