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authorMike Rapoport <rppt@linux.ibm.com>2020-12-10 15:42:20 +1100
committerStephen Rothwell <sfr@canb.auug.org.au>2020-12-16 18:03:05 +1100
commit0db8bd8944717b5b3427a11024e990cc6145935f (patch)
treec01989bd958130d746239d008ea95e57eec88e0f
parent1791ecc108e6c62ae8eaedce3fda75c78d069227 (diff)
downloadlinux-0db8bd8944717b5b3427a11024e990cc6145935f.tar.gz
set_memory: allow set_direct_map_*_noflush() for multiple pages
The underlying implementations of set_direct_map_invalid_noflush() and set_direct_map_default_noflush() allow updating multiple contiguous pages at once. Add numpages parameter to set_direct_map_*_noflush() to expose this ability with these APIs. Link: https://lkml.kernel.org/r/20201203062949.5484-4-rppt@kernel.org Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Christopher Lameter <cl@linux.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Elena Reshetova <elena.reshetova@intel.com> Cc: Hagen Paul Pfeifer <hagen@jauu.net> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Palmer Dabbelt <palmerdabbelt@google.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rick Edgecombe <rick.p.edgecombe@intel.com> Cc: Roman Gushchin <guro@fb.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tycho Andersen <tycho@tycho.ws> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
-rw-r--r--arch/arm64/include/asm/cacheflush.h4
-rw-r--r--arch/arm64/mm/pageattr.c10
-rw-r--r--arch/riscv/include/asm/set_memory.h4
-rw-r--r--arch/riscv/mm/pageattr.c8
-rw-r--r--arch/x86/include/asm/set_memory.h4
-rw-r--r--arch/x86/mm/pat/set_memory.c8
-rw-r--r--include/linux/set_memory.h4
-rw-r--r--kernel/power/snapshot.c2
-rw-r--r--mm/vmalloc.c5
9 files changed, 26 insertions, 23 deletions
diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h
index 45217f21f1fe..d3598419a284 100644
--- a/arch/arm64/include/asm/cacheflush.h
+++ b/arch/arm64/include/asm/cacheflush.h
@@ -138,8 +138,8 @@ static __always_inline void __flush_icache_all(void)
int set_memory_valid(unsigned long addr, int numpages, int enable);
-int set_direct_map_invalid_noflush(struct page *page);
-int set_direct_map_default_noflush(struct page *page);
+int set_direct_map_invalid_noflush(struct page *page, int numpages);
+int set_direct_map_default_noflush(struct page *page, int numpages);
bool kernel_page_present(struct page *page);
#include <asm-generic/cacheflush.h>
diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c
index 92eccaf595c8..b53ef37bf95a 100644
--- a/arch/arm64/mm/pageattr.c
+++ b/arch/arm64/mm/pageattr.c
@@ -148,34 +148,36 @@ int set_memory_valid(unsigned long addr, int numpages, int enable)
__pgprot(PTE_VALID));
}
-int set_direct_map_invalid_noflush(struct page *page)
+int set_direct_map_invalid_noflush(struct page *page, int numpages)
{
struct page_change_data data = {
.set_mask = __pgprot(0),
.clear_mask = __pgprot(PTE_VALID),
};
+ unsigned long size = PAGE_SIZE * numpages;
if (!debug_pagealloc_enabled() && !rodata_full)
return 0;
return apply_to_page_range(&init_mm,
(unsigned long)page_address(page),
- PAGE_SIZE, change_page_range, &data);
+ size, change_page_range, &data);
}
-int set_direct_map_default_noflush(struct page *page)
+int set_direct_map_default_noflush(struct page *page, int numpages)
{
struct page_change_data data = {
.set_mask = __pgprot(PTE_VALID | PTE_WRITE),
.clear_mask = __pgprot(PTE_RDONLY),
};
+ unsigned long size = PAGE_SIZE * numpages;
if (!debug_pagealloc_enabled() && !rodata_full)
return 0;
return apply_to_page_range(&init_mm,
(unsigned long)page_address(page),
- PAGE_SIZE, change_page_range, &data);
+ size, change_page_range, &data);
}
#ifdef CONFIG_DEBUG_PAGEALLOC
diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h
index 211eb8244a45..1aaf2720b8f6 100644
--- a/arch/riscv/include/asm/set_memory.h
+++ b/arch/riscv/include/asm/set_memory.h
@@ -26,8 +26,8 @@ static inline void protect_kernel_text_data(void) {};
static inline int set_memory_rw_nx(unsigned long addr, int numpages) { return 0; }
#endif
-int set_direct_map_invalid_noflush(struct page *page);
-int set_direct_map_default_noflush(struct page *page);
+int set_direct_map_invalid_noflush(struct page *page, int numpages);
+int set_direct_map_default_noflush(struct page *page, int numpages);
bool kernel_page_present(struct page *page);
#endif /* __ASSEMBLY__ */
diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c
index 5e49e4b4a4cc..9618181b70be 100644
--- a/arch/riscv/mm/pageattr.c
+++ b/arch/riscv/mm/pageattr.c
@@ -156,11 +156,11 @@ int set_memory_nx(unsigned long addr, int numpages)
return __set_memory(addr, numpages, __pgprot(0), __pgprot(_PAGE_EXEC));
}
-int set_direct_map_invalid_noflush(struct page *page)
+int set_direct_map_invalid_noflush(struct page *page, int numpages)
{
int ret;
unsigned long start = (unsigned long)page_address(page);
- unsigned long end = start + PAGE_SIZE;
+ unsigned long end = start + PAGE_SIZE * numpages;
struct pageattr_masks masks = {
.set_mask = __pgprot(0),
.clear_mask = __pgprot(_PAGE_PRESENT)
@@ -173,11 +173,11 @@ int set_direct_map_invalid_noflush(struct page *page)
return ret;
}
-int set_direct_map_default_noflush(struct page *page)
+int set_direct_map_default_noflush(struct page *page, int numpages)
{
int ret;
unsigned long start = (unsigned long)page_address(page);
- unsigned long end = start + PAGE_SIZE;
+ unsigned long end = start + PAGE_SIZE * numpages;
struct pageattr_masks masks = {
.set_mask = PAGE_KERNEL,
.clear_mask = __pgprot(0)
diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index 4352f08bfbb5..6224cb291f6c 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -80,8 +80,8 @@ int set_pages_wb(struct page *page, int numpages);
int set_pages_ro(struct page *page, int numpages);
int set_pages_rw(struct page *page, int numpages);
-int set_direct_map_invalid_noflush(struct page *page);
-int set_direct_map_default_noflush(struct page *page);
+int set_direct_map_invalid_noflush(struct page *page, int numpages);
+int set_direct_map_default_noflush(struct page *page, int numpages);
bool kernel_page_present(struct page *page);
extern int kernel_set_to_readonly;
diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c
index 16f878c26667..d157fd617c99 100644
--- a/arch/x86/mm/pat/set_memory.c
+++ b/arch/x86/mm/pat/set_memory.c
@@ -2184,14 +2184,14 @@ static int __set_pages_np(struct page *page, int numpages)
return __change_page_attr_set_clr(&cpa, 0);
}
-int set_direct_map_invalid_noflush(struct page *page)
+int set_direct_map_invalid_noflush(struct page *page, int numpages)
{
- return __set_pages_np(page, 1);
+ return __set_pages_np(page, numpages);
}
-int set_direct_map_default_noflush(struct page *page)
+int set_direct_map_default_noflush(struct page *page, int numpages)
{
- return __set_pages_p(page, 1);
+ return __set_pages_p(page, numpages);
}
#ifdef CONFIG_DEBUG_PAGEALLOC
diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h
index fe1aa4e54680..c650f82db813 100644
--- a/include/linux/set_memory.h
+++ b/include/linux/set_memory.h
@@ -15,11 +15,11 @@ static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
#endif
#ifndef CONFIG_ARCH_HAS_SET_DIRECT_MAP
-static inline int set_direct_map_invalid_noflush(struct page *page)
+static inline int set_direct_map_invalid_noflush(struct page *page, int numpages)
{
return 0;
}
-static inline int set_direct_map_default_noflush(struct page *page)
+static inline int set_direct_map_default_noflush(struct page *page, int numpages)
{
return 0;
}
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index d63560e1cf87..81636c1f3b11 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -86,7 +86,7 @@ static inline void hibernate_restore_unprotect_page(void *page_address) {}
static inline void hibernate_map_page(struct page *page)
{
if (IS_ENABLED(CONFIG_ARCH_HAS_SET_DIRECT_MAP)) {
- int ret = set_direct_map_default_noflush(page);
+ int ret = set_direct_map_default_noflush(page, 1);
if (ret)
pr_warn_once("Failed to remap page\n");
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 4d88fe5a277a..d5b262d53622 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2195,13 +2195,14 @@ struct vm_struct *remove_vm_area(const void *addr)
}
static inline void set_area_direct_map(const struct vm_struct *area,
- int (*set_direct_map)(struct page *page))
+ int (*set_direct_map)(struct page *page,
+ int numpages))
{
int i;
for (i = 0; i < area->nr_pages; i++)
if (page_address(area->pages[i]))
- set_direct_map(area->pages[i]);
+ set_direct_map(area->pages[i], 1);
}
/* Handle removing and resetting vm mappings related to the vm_struct. */