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powerpc/tlb: Add local flush for page given mm_struct and psize

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Adds a local TLB flush operation that works given an mm_struct, VA to
flush, and page size representation. Most implementations mirror the
surrounding code. The book3s/32/tlbflush.h implementation is left as
a BUILD_BUG because it is more complicated and not required for
anything as yet.

This removes the need to create a vm_area_struct, which the temporary
patching mm work does not need.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221109045112.187069-8-bgray@linux.ibm.com
This commit is contained in:
Benjamin Gray
2022-11-09 15:51:10 +11:00
committed by Michael Ellerman
parent d34471c9bd
commit 274d842fa1
4 changed files with 31 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/powerpc/include/asm/book3s/32/tlbflush.h
+9
View File
@@ -2,6 +2,8 @@
#ifndef _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H
#define _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H
#include <linux/build_bug.h>
#define MMU_NO_CONTEXT (0)
/*
* TLB flushing for "classic" hash-MMU 32-bit CPUs, 6xx, 7xx, 7xxx
@@ -74,6 +76,13 @@ static inline void local_flush_tlb_page(struct vm_area_struct *vma,
{
flush_tlb_page(vma, vmaddr);
}
static inline void local_flush_tlb_page_psize(struct mm_struct *mm,
unsigned long vmaddr, int psize)
{
BUILD_BUG();
}
static inline void local_flush_tlb_mm(struct mm_struct *mm)
{
flush_tlb_mm(mm);
arch/powerpc/include/asm/book3s/64/tlbflush.h
+7
View File
@@ -86,6 +86,13 @@ static inline void local_flush_tlb_page(struct vm_area_struct *vma,
radix__local_flush_tlb_page(vma, vmaddr);
}
static inline void local_flush_tlb_page_psize(struct mm_struct *mm,
unsigned long vmaddr, int psize)
{
if (radix_enabled())
radix__local_flush_tlb_page_psize(mm, vmaddr, psize);
}
static inline void tlb_flush(struct mmu_gather *tlb)
{
if (radix_enabled())
arch/powerpc/include/asm/nohash/tlbflush.h
+7
View File
@@ -45,6 +45,12 @@ static inline void local_flush_tlb_page(struct vm_area_struct *vma, unsigned lon
asm volatile ("tlbie %0; sync" : : "r" (vmaddr) : "memory");
}
static inline void local_flush_tlb_page_psize(struct mm_struct *mm,
unsigned long vmaddr, int psize)
{
asm volatile ("tlbie %0; sync" : : "r" (vmaddr) : "memory");
}
static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
start &= PAGE_MASK;
@@ -58,6 +64,7 @@ static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end
extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
extern void local_flush_tlb_mm(struct mm_struct *mm);
extern void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
void local_flush_tlb_page_psize(struct mm_struct *mm, unsigned long vmaddr, int psize);
extern void __local_flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
int tsize, int ind);
arch/powerpc/mm/nohash/tlb.c
+8
View File
@@ -184,6 +184,14 @@ void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
mmu_get_tsize(mmu_virtual_psize), 0);
}
EXPORT_SYMBOL(local_flush_tlb_page);
void local_flush_tlb_page_psize(struct mm_struct *mm,
unsigned long vmaddr, int psize)
{
__local_flush_tlb_page(mm, vmaddr, mmu_get_tsize(psize), 0);
}
EXPORT_SYMBOL(local_flush_tlb_page_psize);
#endif
/*