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powerpc/book3s64/radix: make tlb_single_page_flush_ceiling a debugfs entry

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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
This commit is contained in:
Aneesh Kumar K.V 2021-08-12 18:58:30 +05:30 committed by Michael Ellerman
parent f34ee9cb2c
commit 3e188b1ae8
1 changed files with 14 additions and 2 deletions
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16
arch/powerpc/mm/book3s64/radix_tlb.c
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@ -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);