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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2021-08-12 16:28:30 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-08-13 15:04:26 +0300 |
| commit | 3e188b1ae8807f26cc5a530a9d55f3f643fe050a (patch) | |
| tree | 98cea2193f7f66c6fa08cbb7f40b18db37e4b6f6 | |
| parent | f34ee9cb2c5ac5af426fee6fa4591a34d187e696 (diff) | |
| download | linux-3e188b1ae8807f26cc5a530a9d55f3f643fe050a.tar.xz | |
powerpc/book3s64/radix: make tlb_single_page_flush_ceiling a debugfs entry
Similar to x86/s390 add a debugfs file to tune tlb_single_page_flush_ceiling.
Also add a debugfs entry for tlb_local_single_page_flush_ceiling.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210812132831.233794-1-aneesh.kumar@linux.ibm.com
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_tlb.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c index aefc100d79a7..1fa2bc6a969e 100644 --- a/arch/powerpc/mm/book3s64/radix_tlb.c +++ b/arch/powerpc/mm/book3s64/radix_tlb.c @@ -17,6 +17,7 @@ #include <asm/trace.h> #include <asm/cputhreads.h> #include <asm/plpar_wrappers.h> +#include <asm/debugfs.h> #include "internal.h" @@ -1106,8 +1107,8 @@ EXPORT_SYMBOL(radix__flush_tlb_kernel_range); * invalidating a full PID, so it has a far lower threshold to change from * individual page flushes to full-pid flushes. */ -static unsigned long tlb_single_page_flush_ceiling __read_mostly = 33; -static unsigned long tlb_local_single_page_flush_ceiling __read_mostly = POWER9_TLB_SETS_RADIX * 2; +static u32 tlb_single_page_flush_ceiling __read_mostly = 33; +static u32 tlb_local_single_page_flush_ceiling __read_mostly = POWER9_TLB_SETS_RADIX * 2; static inline void __radix__flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end) @@ -1524,3 +1525,14 @@ void do_h_rpt_invalidate_prt(unsigned long pid, unsigned long lpid, EXPORT_SYMBOL_GPL(do_h_rpt_invalidate_prt); #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ + +static int __init create_tlb_single_page_flush_ceiling(void) +{ + debugfs_create_u32("tlb_single_page_flush_ceiling", 0600, + powerpc_debugfs_root, &tlb_single_page_flush_ceiling); + debugfs_create_u32("tlb_local_single_page_flush_ceiling", 0600, + powerpc_debugfs_root, &tlb_local_single_page_flush_ceiling); + return 0; +} +late_initcall(create_tlb_single_page_flush_ceiling); + |