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Message-Id: <20201026083752.13267-4-rppt@kernel.org>
Date: Mon, 26 Oct 2020 10:37:48 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alexander Viro <viro@...iv.linux.org.uk>,
Andy Lutomirski <luto@...nel.org>,
Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
Catalin Marinas <catalin.marinas@....com>,
Christopher Lameter <cl@...ux.com>,
Dan Williams <dan.j.williams@...el.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
David Hildenbrand <david@...hat.com>,
Elena Reshetova <elena.reshetova@...el.com>,
"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
James Bottomley <jejb@...ux.ibm.com>,
"Kirill A. Shutemov" <kirill@...temov.name>,
Matthew Wilcox <willy@...radead.org>,
Mark Rutland <mark.rutland@....com>,
Mike Rapoport <rppt@...ux.ibm.com>,
Mike Rapoport <rppt@...nel.org>,
Michael Kerrisk <mtk.manpages@...il.com>,
Palmer Dabbelt <palmer@...belt.com>,
Paul Walmsley <paul.walmsley@...ive.com>,
Peter Zijlstra <peterz@...radead.org>,
Rick Edgecombe <rick.p.edgecombe@...el.com>,
Shuah Khan <shuah@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Tycho Andersen <tycho@...ho.ws>, Will Deacon <will@...nel.org>,
linux-api@...r.kernel.org, linux-arch@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-nvdimm@...ts.01.org, linux-riscv@...ts.infradead.org,
x86@...nel.org
Subject: [PATCH v7 3/7] set_memory: allow set_direct_map_*_noflush() for multiple pages
From: Mike Rapoport <rppt@...ux.ibm.com>
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.
Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
---
arch/arm64/include/asm/cacheflush.h | 4 ++--
arch/arm64/mm/pageattr.c | 10 ++++++----
arch/riscv/include/asm/set_memory.h | 4 ++--
arch/riscv/mm/pageattr.c | 8 ++++----
arch/x86/include/asm/set_memory.h | 4 ++--
arch/x86/mm/pat/set_memory.c | 8 ++++----
include/linux/set_memory.h | 4 ++--
mm/vmalloc.c | 5 +++--
8 files changed, 25 insertions(+), 22 deletions(-)
diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h
index 9384fd8fc13c..831739bc93a6 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);
#include <asm-generic/cacheflush.h>
diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c
index 1b94f5b82654..2d4e8c4cdab5 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 (!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 (!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);
}
void __kernel_map_pages(struct page *page, int numpages, int enable)
diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h
index 4c5bae7ca01c..e20f1bef9b11 100644
--- a/arch/riscv/include/asm/set_memory.h
+++ b/arch/riscv/include/asm/set_memory.h
@@ -22,8 +22,8 @@ static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
static inline int set_memory_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);
#endif /* __ASSEMBLY__ */
diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c
index 19fecb362d81..58743bb6b755 100644
--- a/arch/riscv/mm/pageattr.c
+++ b/arch/riscv/mm/pageattr.c
@@ -150,11 +150,11 @@ 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)
@@ -167,11 +167,11 @@ 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 5948218f35c5..2c5fb6b338e7 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);
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 40baa90e74f4..239bdddf6f96 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);
}
void __kernel_map_pages(struct page *page, int numpages, int enable)
diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h
index 860e0f843c12..a938a3775082 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/mm/vmalloc.c b/mm/vmalloc.c
index 6ae491a8b210..670fc20ad44c 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2179,13 +2179,14 @@ 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. */
--
2.28.0
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