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authorAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>2021-08-12 16:28:30 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2021-08-13 15:04:26 +0300
commit3e188b1ae8807f26cc5a530a9d55f3f643fe050a (patch)
tree98cea2193f7f66c6fa08cbb7f40b18db37e4b6f6
parentf34ee9cb2c5ac5af426fee6fa4591a34d187e696 (diff)
downloadlinux-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.c16
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);
+