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Wed, 3 Mar 2021 18:28:16 +0000 From: Sunil Muthuswamy To: Sunil Muthuswamy , Michael Kelley CC: "will@kernel.org" , "catalin.marinas@arm.com" , Mark Rutland , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "linux-hyperv@vger.kernel.org" , "linux-efi@vger.kernel.org" , "arnd@arndb.de" , "wei.liu@kernel.org" , "ardb@kernel.org" , "daniel.lezcano@linaro.org" , KY Srinivasan Subject: RE: [PATCH v8 1/6] arm64: hyperv: Add Hyper-V hypercall and register access utilities Thread-Topic: [PATCH v8 1/6] arm64: hyperv: Add Hyper-V hypercall and register access utilities Thread-Index: AQHXDwVm7IanFUbz6UeLdWLFekPIfapxZzMggAEuN+A= Date: Wed, 3 Mar 2021 18:28:16 +0000 Message-ID: References: <1614649360-5087-1-git-send-email-mikelley@microsoft.com> <1614649360-5087-2-git-send-email-mikelley@microsoft.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: microsoft.com; dkim=none (message not signed) header.d=none;microsoft.com; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > > + > > + /* > > + * Allocate a power of 2 size so alignment to that size is > > + * guaranteed, since the hypercall input and output areas > > + * must not cross a page boundary. > > + */ > > + input = kzalloc(roundup_pow_of_two(sizeof(input->header) + > > + sizeof(input->element[0])), GFP_ATOMIC); > > + output = kmalloc(roundup_pow_of_two(sizeof(*output)), GFP_ATOMIC); > > + > Check for null from these malloc routines? Here and in other places. Between, is there a plan to setup a percpu input/output page for hypercall input/output on ARM (like we do for x64)? I didn't check the specific size requirement for this particular call, but, that generally will remove the need for these allocations. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel