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| author |   Helge Deller <deller@gmx.de> | 2016-11-17 21:27:50 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2016-12-12 22:28:09 +0100 |
| commit | 637250cc8f5e2bfc5c3a96802d1d96b4987a1d62 (patch) | |
| tree | 0c6d2c70971ff8314564fcde4e4c830f9d1dfa54 /arch/parisc/kernel/processor.c | |
| parent | parisc: Re-enable interrupts early (diff) | |
| download | linux-dev-637250cc8f5e2bfc5c3a96802d1d96b4987a1d62.tar.xz linux-dev-637250cc8f5e2bfc5c3a96802d1d96b4987a1d62.zip | |
parisc: Enhance CPU detection code on PAT machines
This patch fixes the debug code which runs during the inventory scan on
machines with PAT firmware.
Additionally print out the relationship between the detected logical CPU
number and it's physical location and physical cpu number.
This leads to information which can be used to feed numa-structures in
the kernel in later patches. An example output is from my single-CPU (2
cores) C8000 machine is:
Logical CPU #0 is physical cpu #0 at 0xffff0000ffff15, hpa 0xfffffffffe780000
Logical CPU #1 is physical cpu #1 at 0xffff0000ffff15, hpa 0xfffffffffe781000
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/kernel/processor.c')
| -rw-r--r-- | arch/parisc/kernel/processor.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c index 0c2a94a0f751..c1c08b5f0cf2 100644 --- a/arch/parisc/kernel/processor.c +++ b/arch/parisc/kernel/processor.c @@ -99,6 +99,7 @@ static int processor_probe(struct parisc_device *dev) unsigned long txn_addr; unsigned long cpuid; struct cpuinfo_parisc *p; + struct pdc_pat_cpu_num cpu_info __maybe_unused; #ifdef CONFIG_SMP if (num_online_cpus() >= nr_cpu_ids) { @@ -123,10 +124,6 @@ static int processor_probe(struct parisc_device *dev) ulong status; unsigned long bytecnt; pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; -#undef USE_PAT_CPUID -#ifdef USE_PAT_CPUID - struct pdc_pat_cpu_num cpu_info; -#endif pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL); if (!pa_pdc_cell) @@ -145,22 +142,27 @@ static int processor_probe(struct parisc_device *dev) kfree(pa_pdc_cell); + /* get the cpu number */ + status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start); + BUG_ON(PDC_OK != status); + + pr_info("Logical CPU #%lu is physical cpu #%lu at location " + "0x%lx with hpa %pa\n", + cpuid, cpu_info.cpu_num, cpu_info.cpu_loc, + &dev->hpa.start); + +#undef USE_PAT_CPUID #ifdef USE_PAT_CPUID /* We need contiguous numbers for cpuid. Firmware's notion * of cpuid is for physical CPUs and we just don't care yet. * We'll care when we need to query PAT PDC about a CPU *after* * boot time (ie shutdown a CPU from an OS perspective). */ - /* get the cpu number */ - status = pdc_pat_cpu_get_number(&cpu_info, dev->hpa.start); - - BUG_ON(PDC_OK != status); - if (cpu_info.cpu_num >= NR_CPUS) { - printk(KERN_WARNING "IGNORING CPU at 0x%x," + printk(KERN_WARNING "IGNORING CPU at %pa," " cpu_slot_id > NR_CPUS" " (%ld > %d)\n", - dev->hpa.start, cpu_info.cpu_num, NR_CPUS); + &dev->hpa.start, cpu_info.cpu_num, NR_CPUS); /* Ignore CPU since it will only crash */ boot_cpu_data.cpu_count--; return 1; |