From d805a6916037a716e858a0a91d844bad1ca8f48b Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 13 Feb 2024 22:04:17 +0100 Subject: x86/mm/numa: Use core domain size on AMD cpuinfo::topo::x86_coreid_bits is about to be phased out. Use the core domain size from the topology information. Add a comment why the early MPTABLE parsing is required and decrapify the loop which sets the APIC ID to node map. Signed-off-by: Thomas Gleixner Tested-by: Juergen Gross Tested-by: Sohil Mehta Tested-by: Michael Kelley Tested-by: Zhang Rui Tested-by: Wang Wendy Tested-by: K Prateek Nayak Link: https://lore.kernel.org/r/20240212153625.270320718@linutronix.de --- arch/x86/mm/amdtopology.c | 35 ++++++++++++++++------------------- 1 file changed, 16 insertions(+), 19 deletions(-) (limited to 'arch/x86/mm/amdtopology.c') diff --git a/arch/x86/mm/amdtopology.c b/arch/x86/mm/amdtopology.c index b3ca7d23e4b0..5681b997b357 100644 --- a/arch/x86/mm/amdtopology.c +++ b/arch/x86/mm/amdtopology.c @@ -54,13 +54,11 @@ static __init int find_northbridge(void) int __init amd_numa_init(void) { - u64 start = PFN_PHYS(0); + unsigned int numnodes, cores, apicid; + u64 prevbase, start = PFN_PHYS(0); u64 end = PFN_PHYS(max_pfn); - unsigned numnodes; - u64 prevbase; - int i, j, nb; u32 nodeid, reg; - unsigned int bits, cores, apicid_base; + int i, j, nb; if (!early_pci_allowed()) return -EINVAL; @@ -158,26 +156,25 @@ int __init amd_numa_init(void) return -ENOENT; /* - * We seem to have valid NUMA configuration. Map apicids to nodes - * using the coreid bits from early_identify_cpu. + * We seem to have valid NUMA configuration. Map apicids to nodes + * using the size of the core domain in the APIC space. */ - bits = boot_cpu_data.x86_coreid_bits; - cores = 1 << bits; - apicid_base = 0; + cores = topology_get_domain_size(TOPO_CORE_DOMAIN); /* - * get boot-time SMP configuration: + * Scan MPTABLE to map the local APIC and ensure that the boot CPU + * APIC ID is valid. This is required because on pre ACPI/SRAT + * systems IO-APICs are mapped before the boot CPU. */ early_get_smp_config(); - if (boot_cpu_physical_apicid > 0) { - pr_info("BSP APIC ID: %02x\n", boot_cpu_physical_apicid); - apicid_base = boot_cpu_physical_apicid; - } - - for_each_node_mask(i, numa_nodes_parsed) - for (j = apicid_base; j < cores + apicid_base; j++) - set_apicid_to_node((i << bits) + j, i); + apicid = boot_cpu_physical_apicid; + if (apicid > 0) + pr_info("BSP APIC ID: %02x\n", apicid); + for_each_node_mask(i, numa_nodes_parsed) { + for (j = 0; j < cores; j++, apicid++) + set_apicid_to_node(apicid, i); + } return 0; } -- cgit v1.2.3 From de6aec241750a4f9d33d0e055d97fb3e0170c31a Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 13 Feb 2024 22:05:16 +0100 Subject: x86/mm/numa: Move early mptable evaluation into common code There is no reason to have the early mptable evaluation conditionally invoked only from the AMD numa topology code. Make it explicit and invoke it from setup_arch() right after the corresponding ACPI init call. Remove the pointless wrapper and invoke x86_init::mpparse::early_parse_smp_config() directly. Signed-off-by: Thomas Gleixner Tested-by: Michael Kelley Tested-by: Sohil Mehta Link: https://lore.kernel.org/r/20240212154639.931761608@linutronix.de --- arch/x86/include/asm/mpspec.h | 5 ----- arch/x86/kernel/setup.c | 2 ++ arch/x86/mm/amdtopology.c | 7 ------- 3 files changed, 2 insertions(+), 12 deletions(-) (limited to 'arch/x86/mm/amdtopology.c') diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h index 82480b7d01f0..b423d11e002d 100644 --- a/arch/x86/include/asm/mpspec.h +++ b/arch/x86/include/asm/mpspec.h @@ -46,11 +46,6 @@ extern int smp_found_config; # define smp_found_config 0 #endif -static inline void early_get_smp_config(void) -{ - x86_init.mpparse.early_parse_smp_cfg(); -} - #ifdef CONFIG_X86_MPPARSE extern void e820__memblock_alloc_reserved_mpc_new(void); extern int enable_update_mptable; diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 1a3d66f17487..b1e52ac164b1 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1088,7 +1088,9 @@ void __init setup_arch(char **cmdline_p) early_platform_quirks(); + /* Some platforms need the APIC registered for NUMA configuration */ early_acpi_boot_init(); + x86_init.mpparse.early_parse_smp_cfg(); x86_flattree_get_config(); diff --git a/arch/x86/mm/amdtopology.c b/arch/x86/mm/amdtopology.c index 5681b997b357..9332b36a1091 100644 --- a/arch/x86/mm/amdtopology.c +++ b/arch/x86/mm/amdtopology.c @@ -161,13 +161,6 @@ int __init amd_numa_init(void) */ cores = topology_get_domain_size(TOPO_CORE_DOMAIN); - /* - * Scan MPTABLE to map the local APIC and ensure that the boot CPU - * APIC ID is valid. This is required because on pre ACPI/SRAT - * systems IO-APICs are mapped before the boot CPU. - */ - early_get_smp_config(); - apicid = boot_cpu_physical_apicid; if (apicid > 0) pr_info("BSP APIC ID: %02x\n", apicid); -- cgit v1.2.3