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Mon, 10 Jan 2022 16:32:12 -0600 From: Alex Sierra To: , , , , , CC: , , , , , , Subject: [PATCH v3 02/10] mm: add device coherent vma selection for memory migration Date: Mon, 10 Jan 2022 16:31:53 -0600 Message-ID: <20220110223201.31024-3-alex.sierra@amd.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220110223201.31024-1-alex.sierra@amd.com> References: <20220110223201.31024-1-alex.sierra@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: b161fbe9-979d-4980-1ed4-08d9d4890c95 X-MS-TrafficTypeDiagnostic: DM6PR12MB2681:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:635; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: VHEJMRGzywtNWH/sGdFLvBNW9MVJbf1SJzRLP19GxRpJT+GMIMlREEVAkpWoULjSkK81YHpVa9WTytpUVNEwJqsSpCJZHNQeq2r2yaZbTuPlIzUUrIZboV3pzHoxspw2tQQNFrPrAOj/gkv5vZN+ECFqsExOEJF8aeqVUDe2KcZRDBbGoJF7tgkofw38ahi9gH7l3VSsNyxXTgE0XI7DhjuORcw+tsGUJkSToLR2eaRHgABZ0zChtKuUgNN5d+0/DnWTwGcfGTAQRLYNB0Uwf9Uxbwuu4LEn+QW4lJfaM0p/B8VFFIvQRz7O6Ien/FTUYysSUzPZEaJpUpnBTXh66sdfBC27Sn27v3PYfrTDnoVjkqm9YHDO0cmrUvbIC5llgE+nWb2Pm4m4OOk2WCkaiAeVtkCh1T/GBXUDRcEPZej6lKAAdc7qeVfiPXj7x3lDp5DeDI6JjNFwMoZagc+byDxn0Kkbk78A8wpQFJfbswzJ4IX/Un4dU+Ucuv9VVqWMfYg15TURrvZmkOZ9IcwSHFqmNjDDPZE8aIvHcUB3WCZRxnnCy5oXlZnSgn7EoQ51NDCZaR5UwYpaugnh6rwpb8W+tV8Wsj6XxKJa1fnqBm5BjYr9GeUpJ84tFEkyP7WRKxUFUwgBhmJ2nC2DL15osum6ZqBlfZlvPAb+duLg46N19G3xvdWzoenT6/sbbmA+NKfjGoqy4Q45KUbIItiARvRf2pQc2BCV8AmwnZTVDTn57QXrSpL1wZze/SvRcS2MVwombHCL8BVO6aPsB6RJWWgqOf7M1GYS5NPZejGVANw= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(40470700002)(36840700001)(46966006)(44832011)(356005)(40460700001)(316002)(82310400004)(81166007)(83380400001)(2616005)(6666004)(16526019)(7696005)(70586007)(70206006)(186003)(7416002)(426003)(508600001)(2906002)(336012)(36756003)(110136005)(5660300002)(4326008)(8936002)(1076003)(8676002)(26005)(36860700001)(47076005)(86362001)(54906003)(36900700001);DIR:OUT;SFP:1101; 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Device coherent type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra --- v2: condition added when migrations from device coherent pages. --- include/linux/migrate.h | 1 + mm/migrate.c | 9 +++++++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/include/linux/migrate.h b/include/linux/migrate.h index c8077e936691..e74bb0978f6f 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -138,6 +138,7 @@ static inline unsigned long migrate_pfn(unsigned long= pfn) enum migrate_vma_direction { MIGRATE_VMA_SELECT_SYSTEM =3D 1 << 0, MIGRATE_VMA_SELECT_DEVICE_PRIVATE =3D 1 << 1, + MIGRATE_VMA_SELECT_DEVICE_COHERENT =3D 1 << 2, }; =20 struct migrate_vma { diff --git a/mm/migrate.c b/mm/migrate.c index 91018880dc7f..0367f471211a 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2340,8 +2340,6 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp, if (is_writable_device_private_entry(entry)) mpfn |=3D MIGRATE_PFN_WRITE; } else { - if (!(migrate->flags & MIGRATE_VMA_SELECT_SYSTEM)) - goto next; pfn =3D pte_pfn(pte); if (is_zero_pfn(pfn)) { mpfn =3D MIGRATE_PFN_MIGRATE; @@ -2349,6 +2347,13 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp, goto next; } page =3D vm_normal_page(migrate->vma, addr, pte); + if (page && !is_zone_device_page(page) && + !(migrate->flags & MIGRATE_VMA_SELECT_SYSTEM)) + goto next; + if (page && is_device_coherent_page(page) && + (!(migrate->flags & MIGRATE_VMA_SELECT_DEVICE_COHERENT) || + page->pgmap->owner !=3D migrate->pgmap_owner)) + goto next; mpfn =3D migrate_pfn(pfn) | MIGRATE_PFN_MIGRATE; mpfn |=3D pte_write(pte) ? MIGRATE_PFN_WRITE : 0; } --=20 2.32.0