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client-ip=40.67.248.234; helo=nebula.arm.com; From: Wei Chen To: , , , , CC: Subject: [XEN RFC PATCH 20/40] xen/arm: implement node distance helpers for Arm64 Date: Wed, 11 Aug 2021 18:24:03 +0800 Message-ID: <20210811102423.28908-21-wei.chen@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210811102423.28908-1-wei.chen@arm.com> References: <20210811102423.28908-1-wei.chen@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 9173b6a8-9437-4cb3-4920-08d95cb25ad3 X-MS-TrafficTypeDiagnostic: AM8PR08MB6371:|PAXPR08MB7188: X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:2449;OLM:2449; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:nebula.arm.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(346002)(396003)(39860400002)(376002)(136003)(46966006)(36840700001)(186003)(2616005)(336012)(356005)(44832011)(81166007)(2906002)(83380400001)(426003)(82740400003)(8676002)(1076003)(86362001)(8936002)(47076005)(36860700001)(5660300002)(82310400003)(36756003)(34070700002)(478600001)(6666004)(70586007)(70206006)(4326008)(7696005)(316002)(110136005)(26005)(2101003)(36900700001);DIR:OUT;SFP:1101; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Aug 2021 10:25:34.7286 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9173b6a8-9437-4cb3-4920-08d95cb25ad3 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR03FT052.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR08MB7188 In current Xen code, __node_distance is a fake API, it always returns NUMA_REMOTE_DISTANCE(20). Now we use a matrix to record the distance between any two nodes. Accordingly, we provide a set_node_distance API to set the distance for any two nodes in this patch. Signed-off-by: Wei Chen --- xen/arch/arm/numa.c | 44 ++++++++++++++++++++++++++++++++++++++ xen/include/asm-arm/numa.h | 12 ++++++++++- xen/include/asm-x86/numa.h | 1 - xen/include/xen/numa.h | 2 +- 4 files changed, 56 insertions(+), 3 deletions(-) diff --git a/xen/arch/arm/numa.c b/xen/arch/arm/numa.c index 566ad1e52b..f61a8df645 100644 --- a/xen/arch/arm/numa.c +++ b/xen/arch/arm/numa.c @@ -23,6 +23,11 @@ #include #include +static uint8_t __read_mostly +node_distance_map[MAX_NUMNODES][MAX_NUMNODES] = { + { NUMA_REMOTE_DISTANCE } +}; + void numa_set_node(int cpu, nodeid_t nid) { if ( nid >= MAX_NUMNODES || @@ -32,6 +37,45 @@ void numa_set_node(int cpu, nodeid_t nid) cpu_to_node[cpu] = nid; } +void __init numa_set_distance(nodeid_t from, nodeid_t to, uint32_t distance) +{ + if ( from >= MAX_NUMNODES || to >= MAX_NUMNODES ) + { + printk(KERN_WARNING + "NUMA nodes are out of matrix, from=%u to=%u distance=%u\n", + from, to, distance); + return; + } + + /* NUMA defines 0xff as an unreachable node and 0-9 are undefined */ + if ( distance >= NUMA_NO_DISTANCE || + (distance >= NUMA_DISTANCE_UDF_MIN && + distance <= NUMA_DISTANCE_UDF_MAX) || + (from == to && distance != NUMA_LOCAL_DISTANCE) ) + { + printk(KERN_WARNING + "Invalid NUMA node distance, from:%d to:%d distance=%d\n", + from, to, distance); + return; + } + + node_distance_map[from][to] = distance; +} + +uint8_t __node_distance(nodeid_t from, nodeid_t to) +{ + /* + * Check whether the nodes are in the matrix range. + * When any node is out of range, except from and to nodes are the + * same, we treat them as unreachable (return 0xFF) + */ + if ( from >= MAX_NUMNODES || to >= MAX_NUMNODES ) + return from == to ? NUMA_LOCAL_DISTANCE : NUMA_NO_DISTANCE; + + return node_distance_map[from][to]; +} +EXPORT_SYMBOL(__node_distance); + void __init numa_init(bool acpi_off) { uint32_t idx; diff --git a/xen/include/asm-arm/numa.h b/xen/include/asm-arm/numa.h index bb495a24e1..559b028a01 100644 --- a/xen/include/asm-arm/numa.h +++ b/xen/include/asm-arm/numa.h @@ -12,8 +12,19 @@ typedef u8 nodeid_t; * set the number of NUMA memory block number to 128. */ #define NODES_SHIFT 6 +/* + * In ACPI spec, 0-9 are the reserved values for node distance, + * 10 indicates local node distance, 20 indicates remote node + * distance. Set node distance map in device tree will follow + * the ACPI's definition. + */ +#define NUMA_DISTANCE_UDF_MIN 0 +#define NUMA_DISTANCE_UDF_MAX 9 +#define NUMA_LOCAL_DISTANCE 10 +#define NUMA_REMOTE_DISTANCE 20 extern void numa_init(bool acpi_off); +extern void numa_set_distance(nodeid_t from, nodeid_t to, uint32_t distance); /* * Temporary for fake NUMA node, when CPU, memory and distance @@ -21,7 +32,6 @@ extern void numa_init(bool acpi_off); * symbols will be removed. */ extern mfn_t first_valid_mfn; -#define __node_distance(a, b) (20) #else diff --git a/xen/include/asm-x86/numa.h b/xen/include/asm-x86/numa.h index 5a57a51e26..e0253c20b7 100644 --- a/xen/include/asm-x86/numa.h +++ b/xen/include/asm-x86/numa.h @@ -21,7 +21,6 @@ extern nodeid_t apicid_to_node[]; extern void init_cpu_to_node(void); void srat_parse_regions(u64 addr); -extern u8 __node_distance(nodeid_t a, nodeid_t b); unsigned int arch_get_dma_bitsize(void); #endif diff --git a/xen/include/xen/numa.h b/xen/include/xen/numa.h index cb08d2eca9..0475823b13 100644 --- a/xen/include/xen/numa.h +++ b/xen/include/xen/numa.h @@ -58,7 +58,7 @@ static inline __attribute__((pure)) nodeid_t phys_to_nid(paddr_t addr) #define node_spanned_pages(nid) (NODE_DATA(nid)->node_spanned_pages) #define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \ NODE_DATA(nid)->node_spanned_pages) - +extern u8 __node_distance(nodeid_t a, nodeid_t b); extern void numa_add_cpu(int cpu); struct node {