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author | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-31 00:11:24 +1100 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-31 09:09:36 +1100 |
commit | f437c51748fa1dd423a878c870ad203843a51c8d (patch) | |
tree | d1593fe45c0341f88eecd26568bb913ac74c64a1 /arch/powerpc/kernel/setup-common.c | |
parent | 872a100a49c3785b4577e002580ca5689d1be7a1 (diff) | |
parent | 29ab6c4708a587bc27ea0c765ac36aef9c1a77c9 (diff) | |
download | linux-f437c51748fa1dd423a878c870ad203843a51c8d.tar.bz2 |
Merge branch 'topic/paca' into next
Bring in yet another series that touches KVM code, and might need to
be merged into the kvm-ppc branch to resolve conflicts.
This required some changes in pnv_power9_force_smt4_catch/release()
due to the paca array becomming an array of pointers.
Diffstat (limited to 'arch/powerpc/kernel/setup-common.c')
-rw-r--r-- | arch/powerpc/kernel/setup-common.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index a6002f9449b1..56f7a2b793e0 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -437,6 +437,8 @@ static void __init cpu_init_thread_core_maps(int tpc) } +u32 *cpu_to_phys_id = NULL; + /** * setup_cpu_maps - initialize the following cpu maps: * cpu_possible_mask @@ -463,6 +465,10 @@ void __init smp_setup_cpu_maps(void) DBG("smp_setup_cpu_maps()\n"); + cpu_to_phys_id = __va(memblock_alloc(nr_cpu_ids * sizeof(u32), + __alignof__(u32))); + memset(cpu_to_phys_id, 0, nr_cpu_ids * sizeof(u32)); + for_each_node_by_type(dn, "cpu") { const __be32 *intserv; __be32 cpu_be; @@ -480,6 +486,7 @@ void __init smp_setup_cpu_maps(void) intserv = of_get_property(dn, "reg", &len); if (!intserv) { cpu_be = cpu_to_be32(cpu); + /* XXX: what is this? uninitialized?? */ intserv = &cpu_be; /* assume logical == phys */ len = 4; } @@ -499,8 +506,8 @@ void __init smp_setup_cpu_maps(void) "enable-method", "spin-table"); set_cpu_present(cpu, avail); - set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j])); set_cpu_possible(cpu, true); + cpu_to_phys_id[cpu] = be32_to_cpu(intserv[j]); cpu++; } @@ -835,6 +842,23 @@ static __init void print_system_info(void) pr_info("-----------------------------------------------------\n"); } +#ifdef CONFIG_SMP +static void smp_setup_pacas(void) +{ + int cpu; + + for_each_possible_cpu(cpu) { + if (cpu == smp_processor_id()) + continue; + allocate_paca(cpu); + set_hard_smp_processor_id(cpu, cpu_to_phys_id[cpu]); + } + + memblock_free(__pa(cpu_to_phys_id), nr_cpu_ids * sizeof(u32)); + cpu_to_phys_id = NULL; +} +#endif + /* * Called into from start_kernel this initializes memblock, which is used * to manage page allocation until mem_init is called. @@ -888,6 +912,9 @@ void __init setup_arch(char **cmdline_p) /* Check the SMT related command line arguments (ppc64). */ check_smt_enabled(); + /* Parse memory topology */ + mem_topology_setup(); + /* On BookE, setup per-core TLB data structures. */ setup_tlb_core_data(); @@ -899,6 +926,7 @@ void __init setup_arch(char **cmdline_p) * so smp_release_cpus() does nothing for them. */ #ifdef CONFIG_SMP + smp_setup_pacas(); smp_release_cpus(); #endif |