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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Sep 2021 12:05:20.1072 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7524a0dc-3fde-42ba-3ca9-08d97e8a6a36 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.33.187.114];Helo=[64aa7808-outbound-2.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: VE1EUR03FT011.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR08MB4783 In this patch, we can start to create NUMA system that is based on device tree. Signed-off-by: Wei Chen --- xen/arch/arm/numa.c | 55 ++++++++++++++++++++++++++++++++++++++ xen/arch/arm/setup.c | 7 +++++ xen/include/asm-arm/numa.h | 6 +++++ 3 files changed, 68 insertions(+) diff --git a/xen/arch/arm/numa.c b/xen/arch/arm/numa.c index 7f05299b76..d7a3d32d4b 100644 --- a/xen/arch/arm/numa.c +++ b/xen/arch/arm/numa.c @@ -18,8 +18,10 @@ * */ #include +#include #include #include +#include static uint8_t __read_mostly node_distance_map[MAX_NUMNODES][MAX_NUMNODES] = { @@ -85,6 +87,59 @@ uint8_t __node_distance(nodeid_t from, nodeid_t to) } EXPORT_SYMBOL(__node_distance); +void __init numa_init(bool acpi_off) +{ + uint32_t idx; + paddr_t ram_start = ~0; + paddr_t ram_size = 0; + paddr_t ram_end = 0; + + /* NUMA has been turned off through Xen parameters */ + if ( numa_off ) + goto mem_init; + + /* Initialize NUMA from device tree when system is not ACPI booted */ + if ( acpi_off ) + { + int ret = numa_device_tree_init(device_tree_flattened); + if ( ret ) + { + printk(XENLOG_WARNING + "Init NUMA from device tree failed, ret=%d\n", ret); + numa_off = true; + } + } + else + { + /* We don't support NUMA for ACPI boot currently */ + printk(XENLOG_WARNING + "ACPI NUMA has not been supported yet, NUMA off!\n"); + numa_off = true; + } + +mem_init: + /* + * Find the minimal and maximum address of RAM, NUMA will + * build a memory to node mapping table for the whole range. + */ + ram_start = bootinfo.mem.bank[0].start; + ram_size = bootinfo.mem.bank[0].size; + ram_end = ram_start + ram_size; + for ( idx = 1 ; idx < bootinfo.mem.nr_banks; idx++ ) + { + paddr_t bank_start = bootinfo.mem.bank[idx].start; + paddr_t bank_size = bootinfo.mem.bank[idx].size; + paddr_t bank_end = bank_start + bank_size; + + ram_size = ram_size + bank_size; + ram_start = min(ram_start, bank_start); + ram_end = max(ram_end, bank_end); + } + + numa_initmem_init(PFN_UP(ram_start), PFN_DOWN(ram_end)); + return; +} + uint32_t __init arch_meminfo_get_nr_bank(void) { return bootinfo.mem.nr_banks; diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index 1f0fbc95b5..6097850682 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -905,6 +905,13 @@ void __init start_xen(unsigned long boot_phys_offset, /* Parse the ACPI tables for possible boot-time configuration */ acpi_boot_table_init(); + /* + * Try to initialize NUMA system, if failed, the system will + * fallback to uniform system which means system has only 1 + * NUMA node. + */ + numa_init(acpi_disabled); + end_boot_allocator(); /* diff --git a/xen/include/asm-arm/numa.h b/xen/include/asm-arm/numa.h index f46e8e2935..5b03dde87f 100644 --- a/xen/include/asm-arm/numa.h +++ b/xen/include/asm-arm/numa.h @@ -24,6 +24,7 @@ typedef u8 nodeid_t; extern void numa_set_distance(nodeid_t from, nodeid_t to, uint32_t distance); extern int numa_device_tree_init(const void *fdt); +extern void numa_init(bool acpi_off); #else @@ -47,6 +48,11 @@ extern mfn_t first_valid_mfn; #define node_start_pfn(nid) (mfn_x(first_valid_mfn)) #define __node_distance(a, b) (20) +static inline void numa_init(bool acpi_off) +{ + +} + static inline void numa_add_cpu(int cpu) { -- 2.25.1