diff options
| author | Thomas Weißschuh <[email protected]> | 2024-10-10 09:01:28 +0200 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2024-11-02 12:37:36 +0100 |
| commit | 1184674d6ef9368b9377213caad3aeb0d97ee1d5 (patch) | |
| tree | 9770c905d99e2b1afdcc4c697b8a85663c5a3cd9 /arch/powerpc/kernel/proc_powerpc.c | |
| parent | c22c06b4cc3a7434f36dac9310604be3ebc6f4f9 (diff) | |
powerpc: Split systemcfg data out of vdso data page
The systemcfg data only has minimal overlap with the vdso data.
Splitting the two avoids mapping the implementation-defined vdso data
into /proc/ppc64/systemcfg.
It is also a preparation for the standardization of vdso data storage.
The only field actually used by both systemcfg and vdso is
tb_ticks_per_sec and it is only changed once during time_init().
Initialize it in both structures there.
Signed-off-by: Thomas Weißschuh <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
Diffstat (limited to 'arch/powerpc/kernel/proc_powerpc.c')
| -rw-r--r-- | arch/powerpc/kernel/proc_powerpc.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/proc_powerpc.c b/arch/powerpc/kernel/proc_powerpc.c index 3bda365843e4..e8083e05a1d0 100644 --- a/arch/powerpc/kernel/proc_powerpc.c +++ b/arch/powerpc/kernel/proc_powerpc.c @@ -4,6 +4,7 @@ */ #include <linux/init.h> +#include <linux/memblock.h> #include <linux/mm.h> #include <linux/proc_fs.h> #include <linux/kernel.h> @@ -44,13 +45,35 @@ static const struct proc_ops page_map_proc_ops = { .proc_mmap = page_map_mmap, }; +static union { + struct systemcfg data; + u8 page[PAGE_SIZE]; +} systemcfg_data_store __page_aligned_data; +struct systemcfg *systemcfg = &systemcfg_data_store.data; static int __init proc_ppc64_init(void) { struct proc_dir_entry *pde; + strcpy((char *)systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); + systemcfg->version.major = SYSTEMCFG_MAJOR; + systemcfg->version.minor = SYSTEMCFG_MINOR; + systemcfg->processor = mfspr(SPRN_PVR); + /* + * Fake the old platform number for pSeries and add + * in LPAR bit if necessary + */ + systemcfg->platform = 0x100; + if (firmware_has_feature(FW_FEATURE_LPAR)) + systemcfg->platform |= 1; + systemcfg->physicalMemorySize = memblock_phys_mem_size(); + systemcfg->dcache_size = ppc64_caches.l1d.size; + systemcfg->dcache_line_size = ppc64_caches.l1d.line_size; + systemcfg->icache_size = ppc64_caches.l1i.size; + systemcfg->icache_line_size = ppc64_caches.l1i.line_size; + pde = proc_create_data("powerpc/systemcfg", S_IFREG | 0444, NULL, - &page_map_proc_ops, vdso_data); + &page_map_proc_ops, systemcfg); if (!pde) return 1; proc_set_size(pde, PAGE_SIZE); |