Commit 3e188b1a authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
Browse files

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: default avatarAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210812132831.233794-1-aneesh.kumar@linux.ibm.com
parent f34ee9cb

arch/powerpc/mm/book3s64/radix_tlb.c

+14 −2
Original line number Diff line number Diff line
@@ -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);