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Received: from [50.53.25.54] (helo=[192.168.254.17]) by casper.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1uU7IE-00000007CNt-32oy; Tue, 24 Jun 2025 17:18:46 +0000 Message-ID: <037f1ba1-ead1-4627-b464-39f1a8010d3f@infradead.org> Date: Tue, 24 Jun 2025 10:18:41 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 6/8] cache: Support cache maintenance for HiSilicon SoC Hydra Home Agent To: Jonathan Cameron , Catalin Marinas , james.morse@arm.com, linux-cxl@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, gregkh@linuxfoundation.org, Will Deacon , Dan Williams , Davidlohr Bueso Cc: Yicong Yang , linuxarm@huawei.com, Yushan Wang , Lorenzo Pieralisi , Mark Rutland , Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, H Peter Anvin , Andy Lutomirski , Peter Zijlstra References: <20250624154805.66985-1-Jonathan.Cameron@huawei.com> <20250624154805.66985-7-Jonathan.Cameron@huawei.com> Content-Language: en-US From: Randy Dunlap In-Reply-To: <20250624154805.66985-7-Jonathan.Cameron@huawei.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam11 X-Rspam-User: X-Rspamd-Queue-Id: CD31220013 X-Stat-Signature: czkufb8z3uehsewaoo9gyt9e8egfk9ux X-HE-Tag: 1750785534-981339 X-HE-Meta: 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 1TEQZ/ai DTSrLSusU6UB+Q9Yfnxu94gFUteclNHuQ1lA/P1iulYn1y3SskP8OkHHssPrCH1SQspEq1GNdNIhtlCTVA7GVgbSMwtqNnUGZcsqUikNOlm9Z//QOhuygMEBKpc01x/04xR4WijJw8eTCx77VLz8KXSUzY9Squ0xyDAGd5CrqZ8EFfflRjE8jMc6PH1qu1qVtj2Ej6/3IwXYpsffLWaeFgYeIdJtyczPA475rkYk74qXBRzm381vxtPWzg5Uhtt52brkkk4uPfz2lCYdVyZKS7J53cLd3ce1qJWVa8WK8b0QtfKkjoIKkLLBLJQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi-- On 6/24/25 8:48 AM, Jonathan Cameron wrote: > diff --git a/drivers/cache/Kconfig b/drivers/cache/Kconfig > index bedc51bea1d1..0ed87f25bd69 100644 > --- a/drivers/cache/Kconfig > +++ b/drivers/cache/Kconfig > @@ -10,6 +10,20 @@ config CACHE_COHERENCY_SUBSYSTEM > kernel subsystems to issue invalidations and similar coherency > operations. > > +if CACHE_COHERENCY_SUBSYSTEM > + > +config HISI_SOC_HHA > + tristate "HiSilicon Hydra Home Agent (HHA) device driver" > + depends on (ARM64 && ACPI) || COMPILE_TEST > + help > + The Hydra Home Agent (HHA) is responsible of cache coherency for cache coherency > + on SoC. This drivers provides cache maintenance functions of HHA. on the SoC. > + > + This driver can be built as a module. If so, the module will be > + called hisi_soc_hha. > + > +endif -- ~Randy