From mboxrd@z Thu Jan 1 00:00:00 1970 From: vinod.koul@intel.com (Vinod Koul) Date: Tue, 6 Dec 2016 10:31:15 +0530 Subject: [RESEND PATCH V6 5/6] dmaengine: pl330: Make sure microcode is privileged In-Reply-To: <1480690509-13490-6-git-send-email-sricharan@codeaurora.org> References: <1480690509-13490-1-git-send-email-sricharan@codeaurora.org> <1480690509-13490-6-git-send-email-sricharan@codeaurora.org> Message-ID: <20161206050115.GP6408@localhost> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Dec 02, 2016 at 08:25:08PM +0530, Sricharan R wrote: > From: Mitchel Humpherys > > The PL330 performs privileged instruction fetches. This can result in > SMMU permission faults on SMMUs that implement the ARMv8 VMSA, which > specifies that mappings that are writeable at one execution level shall > not be executable at any higher-privileged level. Fix this by using the > DMA_ATTR_PRIVILEGED attribute, which will ensure that the microcode > IOMMU mapping is only accessible to the privileged level. Acked-by: Vinod Koul -- ~Vinod