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dkim=none (message not signed) header.d=none;lists.freedesktop.org; dmarc=none action=none header.from=oracle.com; From: Dongli Zhang To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, iommu@lists.linux-foundation.org, linux-mips@vger.kernel.org, linux-mmc@vger.kernel.org, linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, nouveau@lists.freedesktop.org, x86@kernel.org, xen-devel@lists.xenproject.org Cc: linux-kernel@vger.kernel.org, adrian.hunter@intel.com, akpm@linux-foundation.org, benh@kernel.crashing.org, bskeggs@redhat.com, bhelgaas@google.com, bp@alien8.de, boris.ostrovsky@oracle.com, hch@lst.de, chris@chris-wilson.co.uk, daniel@ffwll.ch, airlied@linux.ie, hpa@zytor.com, mingo@kernel.org, mingo@redhat.com, jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, jgross@suse.com, konrad.wilk@oracle.com, m.szyprowski@samsung.com, matthew.auld@intel.com, mpe@ellerman.id.au, rppt@kernel.org, paulus@samba.org, peterz@infradead.org, robin.murphy@arm.com, rodrigo.vivi@intel.com, sstabellini@kernel.org, bauerman@linux.ibm.com, tsbogend@alpha.franken.de, tglx@linutronix.de, ulf.hansson@linaro.org, joe.jin@oracle.com, thomas.lendacky@amd.com Subject: [PATCH RFC v1 1/6] swiotlb: define new enumerated type Date: Wed, 3 Feb 2021 15:37:04 -0800 Message-Id: <20210203233709.19819-2-dongli.zhang@oracle.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210203233709.19819-1-dongli.zhang@oracle.com> References: <20210203233709.19819-1-dongli.zhang@oracle.com> X-Originating-IP: [138.3.200.16] X-ClientProxiedBy: CH0PR03CA0008.namprd03.prod.outlook.com (2603:10b6:610:b0::13) To BYAPR10MB2663.namprd10.prod.outlook.com (2603:10b6:a02:a9::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 95a27da3-82a5-4fa4-cf2a-08d8c89cb345 X-MS-TrafficTypeDiagnostic: SJ0PR10MB4784: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:2657; 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The 'SWIOTLB_LO' is to index legacy 32-bit swiotlb buffer, while the 'SWIOTLB_HI' is to index the 64-bit buffer. This is to prepare to enable 64-bit swiotlb. Cc: Joe Jin Signed-off-by: Dongli Zhang --- include/linux/swiotlb.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index d9c9fc9ca5d2..ca125c1b1281 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -17,6 +17,12 @@ enum swiotlb_force { SWIOTLB_NO_FORCE, /* swiotlb=noforce */ }; +enum swiotlb_t { + SWIOTLB_LO, + SWIOTLB_HI, + SWIOTLB_MAX, +}; + /* * Maximum allowable number of contiguous slabs to map, * must be a power of 2. What is the appropriate value ?