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Merge branch 'next/tlb-opt' into for-next

This commit is contained in:
Paul Walmsley 2019-11-22 18:58:32 -08:00
parent 9acfd6f538 6efb16b1d5
commit e8cad25b7e
1 changed files with 23 additions and 2 deletions
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25
arch/riscv/mm/tlbflush.c
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@ -2,6 +2,7 @@
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/sched.h>
#include <asm/sbi.h>
void flush_tlb_all(void)
@ -9,13 +10,33 @@ void flush_tlb_all(void)
sbi_remote_sfence_vma(NULL, 0, -1);
}
/*
* This function must not be called with cmask being null.
* Kernel may panic if cmask is NULL.
*/
static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start,
unsigned long size)
{
struct cpumask hmask;
unsigned int cpuid;
riscv_cpuid_to_hartid_mask(cmask, &hmask);
sbi_remote_sfence_vma(hmask.bits, start, size);
if (cpumask_empty(cmask))
return;
cpuid = get_cpu();
if (cpumask_any_but(cmask, cpuid) >= nr_cpu_ids) {
/* local cpu is the only cpu present in cpumask */
if (size <= PAGE_SIZE)
local_flush_tlb_page(start);
else
local_flush_tlb_all();
} else {
riscv_cpuid_to_hartid_mask(cmask, &hmask);
sbi_remote_sfence_vma(cpumask_bits(&hmask), start, size);
}
put_cpu();
}
void flush_tlb_mm(struct mm_struct *mm)