The patch titled
Subject: arch: introduce set_direct_map_valid_noflush()
has been added to the -mm mm-unstable branch. Its filename is
arch-introduce-set_direct_map_valid_noflush.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/arch-introduce-set_direct_map_valid_noflush.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Mike Rapoport (Microsoft)" <rppt@xxxxxxxxxx>
Subject: arch: introduce set_direct_map_valid_noflush()
Date: Wed, 16 Oct 2024 15:24:21 +0300
Add an API that will allow updates of the direct/linear map for a set of
physically contiguous pages.
It will be used in the following patches.
Link: https://lkml.kernel.org/r/20241016122424.1655560-6-rppt@xxxxxxxxxx
Signed-off-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Cc: Brian Cain <bcain@xxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Guo Ren <guoren@xxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: Huacai Chen <chenhuacai@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Cc: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Max Filippov <jcmvbkbc@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Song Liu <song@xxxxxxxxxx>
Cc: Stafford Horne <shorne@xxxxxxxxx>
Cc: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/set_memory.h | 1 +
arch/arm64/mm/pageattr.c | 10 ++++++++++
arch/loongarch/include/asm/set_memory.h | 1 +
arch/loongarch/mm/pageattr.c | 19 +++++++++++++++++++
arch/riscv/include/asm/set_memory.h | 1 +
arch/riscv/mm/pageattr.c | 15 +++++++++++++++
arch/s390/include/asm/set_memory.h | 1 +
arch/s390/mm/pageattr.c | 11 +++++++++++
arch/x86/include/asm/set_memory.h | 1 +
arch/x86/mm/pat/set_memory.c | 8 ++++++++
include/linux/set_memory.h | 6 ++++++
11 files changed, 74 insertions(+)
--- a/arch/arm64/include/asm/set_memory.h~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/arm64/include/asm/set_memory.h
@@ -13,6 +13,7 @@ int set_memory_valid(unsigned long addr,
int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
bool kernel_page_present(struct page *page);
#endif /* _ASM_ARM64_SET_MEMORY_H */
--- a/arch/arm64/mm/pageattr.c~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/arm64/mm/pageattr.c
@@ -192,6 +192,16 @@ int set_direct_map_default_noflush(struc
PAGE_SIZE, change_page_range, &data);
}
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid)
+{
+ unsigned long addr = (unsigned long)page_address(page);
+
+ if (!can_set_direct_map())
+ return 0;
+
+ return set_memory_valid(addr, nr, valid);
+}
+
#ifdef CONFIG_DEBUG_PAGEALLOC
void __kernel_map_pages(struct page *page, int numpages, int enable)
{
--- a/arch/loongarch/include/asm/set_memory.h~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/loongarch/include/asm/set_memory.h
@@ -17,5 +17,6 @@ int set_memory_rw(unsigned long addr, in
bool kernel_page_present(struct page *page);
int set_direct_map_default_noflush(struct page *page);
int set_direct_map_invalid_noflush(struct page *page);
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
#endif /* _ASM_LOONGARCH_SET_MEMORY_H */
--- a/arch/loongarch/mm/pageattr.c~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/loongarch/mm/pageattr.c
@@ -216,3 +216,22 @@ int set_direct_map_invalid_noflush(struc
return __set_memory(addr, 1, __pgprot(0), __pgprot(_PAGE_PRESENT | _PAGE_VALID));
}
+
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid)
+{
+ unsigned long addr = (unsigned long)page_address(page);
+ pgprot_t set, clear;
+
+ if (addr < vm_map_base)
+ return 0;
+
+ if (valid) {
+ set = PAGE_KERNEL;
+ clear = __pgprot(0);
+ } else {
+ set = __pgprot(0);
+ clear = __pgprot(_PAGE_PRESENT | _PAGE_VALID);
+ }
+
+ return __set_memory(addr, 1, set, clear);
+}
--- a/arch/riscv/include/asm/set_memory.h~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/riscv/include/asm/set_memory.h
@@ -42,6 +42,7 @@ static inline int set_kernel_memory(char
int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
bool kernel_page_present(struct page *page);
#endif /* __ASSEMBLY__ */
--- a/arch/riscv/mm/pageattr.c~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/riscv/mm/pageattr.c
@@ -386,6 +386,21 @@ int set_direct_map_default_noflush(struc
PAGE_KERNEL, __pgprot(_PAGE_EXEC));
}
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid)
+{
+ pgprot_t set, clear;
+
+ if (valid) {
+ set = PAGE_KERNEL;
+ clear = __pgprot(_PAGE_EXEC);
+ } else {
+ set = __pgprot(0);
+ clear = __pgprot(_PAGE_PRESENT);
+ }
+
+ return __set_memory((unsigned long)page_address(page), nr, set, clear);
+}
+
#ifdef CONFIG_DEBUG_PAGEALLOC
static int debug_pagealloc_set_page(pte_t *pte, unsigned long addr, void *data)
{
--- a/arch/s390/include/asm/set_memory.h~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/s390/include/asm/set_memory.h
@@ -62,5 +62,6 @@ __SET_MEMORY_FUNC(set_memory_4k, SET_MEM
int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
#endif
--- a/arch/s390/mm/pageattr.c~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/s390/mm/pageattr.c
@@ -406,6 +406,17 @@ int set_direct_map_default_noflush(struc
return __set_memory((unsigned long)page_to_virt(page), 1, SET_MEMORY_DEF);
}
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid)
+{
+ unsigned long flags;
+
+ if (valid)
+ flags = SET_MEMORY_DEF;
+ else
+ flags = SET_MEMORY_INV;
+
+ return __set_memory((unsigned long)page_to_virt(page), nr, flags);
+}
#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KFENCE)
static void ipte_range(pte_t *pte, unsigned long address, int nr)
--- a/arch/x86/include/asm/set_memory.h~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/x86/include/asm/set_memory.h
@@ -89,6 +89,7 @@ int set_pages_rw(struct page *page, int
int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
bool kernel_page_present(struct page *page);
extern int kernel_set_to_readonly;
--- a/arch/x86/mm/pat/set_memory.c~arch-introduce-set_direct_map_valid_noflush
+++ a/arch/x86/mm/pat/set_memory.c
@@ -2444,6 +2444,14 @@ int set_direct_map_default_noflush(struc
return __set_pages_p(page, 1);
}
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid)
+{
+ if (valid)
+ return __set_pages_p(page, nr);
+
+ return __set_pages_np(page, nr);
+}
+
#ifdef CONFIG_DEBUG_PAGEALLOC
void __kernel_map_pages(struct page *page, int numpages, int enable)
{
--- a/include/linux/set_memory.h~arch-introduce-set_direct_map_valid_noflush
+++ a/include/linux/set_memory.h
@@ -34,6 +34,12 @@ static inline int set_direct_map_default
return 0;
}
+static inline int set_direct_map_valid_noflush(struct page *page,
+ unsigned nr, bool valid)
+{
+ return 0;
+}
+
static inline bool kernel_page_present(struct page *page)
{
return true;
_
Patches currently in -mm which might be from rppt@xxxxxxxxxx are
mm-kmemleak-fix-typo-in-object_no_scan-comment.patch
mm-vmalloc-group-declarations-depending-on-config_mmu-together.patch
mm-vmalloc-dont-account-for-number-of-nodes-for-huge_vmap-allocations.patch
asm-generic-introduce-text-patchingh.patch
module-prepare-to-handle-rox-allocations-for-text.patch
arch-introduce-set_direct_map_valid_noflush.patch
x86-module-prepare-module-loading-for-rox-allocations-of-text.patch
execmem-add-support-for-cache-of-large-rox-pages.patch
x86-module-enable-rox-caches-for-module-text-on-64-bit.patch
