From: Benjamin Gray <bgray@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: ajd@linux.ibm.com, jniethe5@gmail.com,
Benjamin Gray <bgray@linux.ibm.com>,
npiggin@gmail.com, cmr@bluescreens.de
Subject: [PATCH v8 4/6] powerpc/tlb: Add local flush for page given mm_struct and psize
Date: Fri, 21 Oct 2022 16:22:36 +1100 [thread overview]
Message-ID: <20221021052238.580986-5-bgray@linux.ibm.com> (raw)
In-Reply-To: <20221021052238.580986-1-bgray@linux.ibm.com>
Adds a local TLB flush operation that works given an mm_struct, VA to
flush, and page size representation.
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>
---
arch/powerpc/include/asm/book3s/32/tlbflush.h | 9 +++++++++
arch/powerpc/include/asm/book3s/64/tlbflush-hash.h | 5 +++++
arch/powerpc/include/asm/book3s/64/tlbflush.h | 8 ++++++++
arch/powerpc/include/asm/nohash/tlbflush.h | 1 +
4 files changed, 23 insertions(+)
diff --git a/arch/powerpc/include/asm/book3s/32/tlbflush.h b/arch/powerpc/include/asm/book3s/32/tlbflush.h
index ba1743c52b56..e5a688cebf69 100644
--- a/arch/powerpc/include/asm/book3s/32/tlbflush.h
+++ b/arch/powerpc/include/asm/book3s/32/tlbflush.h
@@ -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_ON(psize != MMU_PAGE_4K);
+ flush_range(mm, vmaddr, vmaddr + PAGE_SIZE);
+}
+
static inline void local_flush_tlb_mm(struct mm_struct *mm)
{
flush_tlb_mm(mm);
diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
index fab8332fe1ad..8fd9dc49b2a1 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h
@@ -94,6 +94,11 @@ static inline void hash__local_flush_tlb_page(struct vm_area_struct *vma,
{
}
+static inline void hash__local_flush_tlb_page_psize(struct mm_struct *mm,
+ unsigned long vmaddr, int psize)
+{
+}
+
static inline void hash__flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
diff --git a/arch/powerpc/include/asm/book3s/64/tlbflush.h b/arch/powerpc/include/asm/book3s/64/tlbflush.h
index 67655cd60545..2d839dd5c08c 100644
--- a/arch/powerpc/include/asm/book3s/64/tlbflush.h
+++ b/arch/powerpc/include/asm/book3s/64/tlbflush.h
@@ -92,6 +92,14 @@ static inline void local_flush_tlb_page(struct vm_area_struct *vma,
return hash__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())
+ return radix__local_flush_tlb_page_psize(mm, vmaddr, psize);
+ return hash__local_flush_tlb_page_psize(mm, vmaddr, psize);
+}
+
static inline void local_flush_all_mm(struct mm_struct *mm)
{
if (radix_enabled())
diff --git a/arch/powerpc/include/asm/nohash/tlbflush.h b/arch/powerpc/include/asm/nohash/tlbflush.h
index bdaf34ad41ea..59bce0ebdcf4 100644
--- a/arch/powerpc/include/asm/nohash/tlbflush.h
+++ b/arch/powerpc/include/asm/nohash/tlbflush.h
@@ -58,6 +58,7 @@ 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);
+extern 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);
--
2.37.3
next prev parent reply other threads:[~2022-10-21 5:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-21 5:22 [PATCH v8 0/6] Use per-CPU temporary mappings for patching Benjamin Gray
2022-10-21 5:22 ` [PATCH v8 1/6] powerpc: Allow clearing and restoring registers independent of saved breakpoint state Benjamin Gray
2022-10-24 3:06 ` Russell Currey
2022-10-21 5:22 ` [PATCH v8 2/6] powerpc/code-patching: Use WARN_ON and fix check in poking_init Benjamin Gray
2022-10-24 3:08 ` Russell Currey
2022-10-21 5:22 ` [PATCH v8 3/6] powerpc/code-patching: Verify instruction patch succeeded Benjamin Gray
2022-10-24 3:20 ` Russell Currey
2022-10-25 3:30 ` Benjamin Gray
2022-10-21 5:22 ` Benjamin Gray [this message]
2022-10-24 3:30 ` [PATCH v8 4/6] powerpc/tlb: Add local flush for page given mm_struct and psize Russell Currey
2022-10-24 5:22 ` Benjamin Gray
2022-10-24 4:22 ` Russell Currey
2022-10-21 5:22 ` [PATCH v8 5/6] powerpc/code-patching: Use temporary mm for Radix MMU Benjamin Gray
2022-10-24 3:45 ` Russell Currey
2022-10-24 5:17 ` Benjamin Gray
2022-10-24 15:39 ` Christopher M. Riedl
2022-10-24 8:46 ` kernel test robot
2022-10-21 5:22 ` [PATCH v8 6/6] powerpc/code-patching: Use CPU local patch address directly Benjamin Gray
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