* [PATCH 27/29] arm64: use __vmalloc_node in arch_alloc_vmap_stack
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
arch_alloc_vmap_stack can use a slightly higher level vmalloc function.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/arm64/include/asm/vmap_stack.h | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/include/asm/vmap_stack.h b/arch/arm64/include/asm/vmap_stack.h
index 0a12115d9638..0cc6636e3f15 100644
--- a/arch/arm64/include/asm/vmap_stack.h
+++ b/arch/arm64/include/asm/vmap_stack.h
@@ -19,10 +19,8 @@ static inline unsigned long *arch_alloc_vmap_stack(size_t stack_size, int node)
{
BUILD_BUG_ON(!IS_ENABLED(CONFIG_VMAP_STACK));
- return __vmalloc_node_range(stack_size, THREAD_ALIGN,
- VMALLOC_START, VMALLOC_END,
- THREADINFO_GFP, PAGE_KERNEL, 0, node,
- __builtin_return_address(0));
+ return __vmalloc_node(stack_size, THREAD_ALIGN, THREADINFO_GFP, node,
+ __builtin_return_address(0));
}
#endif /* __ASM_VMAP_STACK_H */
--
2.25.1
^ permalink raw reply related
* [PATCH 26/29] mm: remove vmalloc_user_node_flags
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, Johannes Weiner, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Open code it in __bpf_map_area_alloc, which is the only caller. Also
clean up __bpf_map_area_alloc to have a single vmalloc call with
slightly different flags instead of the current two different calls.
For this to compile for the nommu case add a __vmalloc_node_range stub
to nommu.c.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
---
include/linux/vmalloc.h | 1 -
kernel/bpf/syscall.c | 24 ++++++++++++++----------
mm/nommu.c | 14 ++++++++------
mm/vmalloc.c | 20 --------------------
4 files changed, 22 insertions(+), 37 deletions(-)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 108f49b47756..f90f2946aac2 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -106,7 +106,6 @@ extern void *vzalloc(unsigned long size);
extern void *vmalloc_user(unsigned long size);
extern void *vmalloc_node(unsigned long size, int node);
extern void *vzalloc_node(unsigned long size, int node);
-extern void *vmalloc_user_node_flags(unsigned long size, int node, gfp_t flags);
extern void *vmalloc_exec(unsigned long size);
extern void *vmalloc_32(unsigned long size);
extern void *vmalloc_32_user(unsigned long size);
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 48d98ea8fad6..dd30b334c554 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -25,6 +25,7 @@
#include <linux/nospec.h>
#include <linux/audit.h>
#include <uapi/linux/btf.h>
+#include <asm/pgtable.h>
#include <linux/bpf_lsm.h>
#define IS_FD_ARRAY(map) ((map)->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY || \
@@ -281,26 +282,29 @@ static void *__bpf_map_area_alloc(u64 size, int numa_node, bool mmapable)
* __GFP_RETRY_MAYFAIL to avoid such situations.
*/
- const gfp_t flags = __GFP_NOWARN | __GFP_ZERO;
+ const gfp_t gfp = __GFP_NOWARN | __GFP_ZERO;
+ unsigned int flags = 0;
+ unsigned long align = 1;
void *area;
if (size >= SIZE_MAX)
return NULL;
/* kmalloc()'ed memory can't be mmap()'ed */
- if (!mmapable && size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
- area = kmalloc_node(size, GFP_USER | __GFP_NORETRY | flags,
+ if (mmapable) {
+ BUG_ON(!PAGE_ALIGNED(size));
+ align = SHMLBA;
+ flags = VM_USERMAP;
+ } else if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
+ area = kmalloc_node(size, gfp | GFP_USER | __GFP_NORETRY,
numa_node);
if (area != NULL)
return area;
}
- if (mmapable) {
- BUG_ON(!PAGE_ALIGNED(size));
- return vmalloc_user_node_flags(size, numa_node, GFP_KERNEL |
- __GFP_RETRY_MAYFAIL | flags);
- }
- return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_RETRY_MAYFAIL | flags,
- numa_node, __builtin_return_address(0));
+
+ return __vmalloc_node_range(size, align, VMALLOC_START, VMALLOC_END,
+ gfp | GFP_KERNEL | __GFP_RETRY_MAYFAIL, PAGE_KERNEL,
+ flags, numa_node, __builtin_return_address(0));
}
void *bpf_map_area_alloc(u64 size, int numa_node)
diff --git a/mm/nommu.c b/mm/nommu.c
index 81a86cd85893..b42cd6003d7d 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -150,6 +150,14 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask)
}
EXPORT_SYMBOL(__vmalloc);
+void *__vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, unsigned long vm_flags, int node,
+ const void *caller)
+{
+ return __vmalloc(size, flags);
+}
+
void *__vmalloc_node(unsigned long size, unsigned long align, gfp_t gfp_mask,
int node, const void *caller)
{
@@ -180,12 +188,6 @@ void *vmalloc_user(unsigned long size)
}
EXPORT_SYMBOL(vmalloc_user);
-void *vmalloc_user_node_flags(unsigned long size, int node, gfp_t flags)
-{
- return __vmalloc_user_flags(size, flags | __GFP_ZERO);
-}
-EXPORT_SYMBOL(vmalloc_user_node_flags);
-
struct page *vmalloc_to_page(const void *addr)
{
return virt_to_page(addr);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 333fbe77255a..f6f2acdaf70c 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2658,26 +2658,6 @@ void *vzalloc_node(unsigned long size, int node)
}
EXPORT_SYMBOL(vzalloc_node);
-/**
- * vmalloc_user_node_flags - allocate memory for userspace on a specific node
- * @size: allocation size
- * @node: numa node
- * @flags: flags for the page level allocator
- *
- * The resulting memory area is zeroed so it can be mapped to userspace
- * without leaking data.
- *
- * Return: pointer to the allocated memory or %NULL on error
- */
-void *vmalloc_user_node_flags(unsigned long size, int node, gfp_t flags)
-{
- return __vmalloc_node_range(size, SHMLBA, VMALLOC_START, VMALLOC_END,
- flags | __GFP_ZERO, PAGE_KERNEL,
- VM_USERMAP, node,
- __builtin_return_address(0));
-}
-EXPORT_SYMBOL(vmalloc_user_node_flags);
-
/**
* vmalloc_exec - allocate virtually contiguous, executable memory
* @size: allocation size
--
2.25.1
^ permalink raw reply related
* [PATCH 25/29] mm: switch the test_vmalloc module to use __vmalloc_node
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
No need to export the very low-level __vmalloc_node_range when the
test module can use a slightly higher level variant.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
lib/test_vmalloc.c | 26 +++++++-------------------
mm/vmalloc.c | 17 ++++++++---------
2 files changed, 15 insertions(+), 28 deletions(-)
diff --git a/lib/test_vmalloc.c b/lib/test_vmalloc.c
index 8bbefcaddfe8..cd6aef05dfb4 100644
--- a/lib/test_vmalloc.c
+++ b/lib/test_vmalloc.c
@@ -91,12 +91,8 @@ static int random_size_align_alloc_test(void)
*/
size = ((rnd % 10) + 1) * PAGE_SIZE;
- ptr = __vmalloc_node_range(size, align,
- VMALLOC_START, VMALLOC_END,
- GFP_KERNEL | __GFP_ZERO,
- PAGE_KERNEL,
- 0, 0, __builtin_return_address(0));
-
+ ptr = __vmalloc_node(size, align, GFP_KERNEL | __GFP_ZERO,
+ __builtin_return_address(0));
if (!ptr)
return -1;
@@ -118,12 +114,8 @@ static int align_shift_alloc_test(void)
for (i = 0; i < BITS_PER_LONG; i++) {
align = ((unsigned long) 1) << i;
- ptr = __vmalloc_node_range(PAGE_SIZE, align,
- VMALLOC_START, VMALLOC_END,
- GFP_KERNEL | __GFP_ZERO,
- PAGE_KERNEL,
- 0, 0, __builtin_return_address(0));
-
+ ptr = __vmalloc_node(PAGE_SIZE, align, GFP_KERNEL | __GFP_ZERO,
+ __builtin_return_address(0));
if (!ptr)
return -1;
@@ -139,13 +131,9 @@ static int fix_align_alloc_test(void)
int i;
for (i = 0; i < test_loop_count; i++) {
- ptr = __vmalloc_node_range(5 * PAGE_SIZE,
- THREAD_ALIGN << 1,
- VMALLOC_START, VMALLOC_END,
- GFP_KERNEL | __GFP_ZERO,
- PAGE_KERNEL,
- 0, 0, __builtin_return_address(0));
-
+ ptr = __vmalloc_node(5 * PAGE_SIZE, THREAD_ALIGN << 1,
+ GFP_KERNEL | __GFP_ZERO,
+ __builtin_return_address(0));
if (!ptr)
return -1;
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index ae8249ef5821..333fbe77255a 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2522,15 +2522,6 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align,
return NULL;
}
-/*
- * This is only for performance analysis of vmalloc and stress purpose.
- * It is required by vmalloc test module, therefore do not use it other
- * than that.
- */
-#ifdef CONFIG_TEST_VMALLOC_MODULE
-EXPORT_SYMBOL_GPL(__vmalloc_node_range);
-#endif
-
/**
* __vmalloc_node - allocate virtually contiguous memory
* @size: allocation size
@@ -2556,6 +2547,14 @@ void *__vmalloc_node(unsigned long size, unsigned long align,
return __vmalloc_node_range(size, align, VMALLOC_START, VMALLOC_END,
gfp_mask, PAGE_KERNEL, 0, node, caller);
}
+/*
+ * This is only for performance analysis of vmalloc and stress purpose.
+ * It is required by vmalloc test module, therefore do not use it other
+ * than that.
+ */
+#ifdef CONFIG_TEST_VMALLOC_MODULE
+EXPORT_SYMBOL_GPL(__vmalloc_node);
+#endif
void *__vmalloc(unsigned long size, gfp_t gfp_mask)
{
--
2.25.1
^ permalink raw reply related
* Re: [PATCH 4/8] binfmt_elf: open code copy_siginfo_to_user to kernelspace buffer
From: Arnd Bergmann @ 2020-04-14 13:15 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Jeremy Kerr, linux-kernel@vger.kernel.org, Eric W . Biederman,
Linux FS-devel Mailing List, Andrew Morton, linuxppc-dev,
Alexander Viro
In-Reply-To: <20200414070142.288696-5-hch@lst.de>
On Tue, Apr 14, 2020 at 9:02 AM Christoph Hellwig <hch@lst.de> wrote:
>
> Instead of messing with the address limit just open code the trivial
> memcpy + memset logic for the native version, and a call to
> to_compat_siginfo for the compat version.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Nice!
> */
> #define user_long_t compat_long_t
> #define user_siginfo_t compat_siginfo_t
> -#define copy_siginfo_to_user copy_siginfo_to_user32
> +#define fill_siginfo_note(note, csigdata, siginfo) \
> +do { \
> + to_compat_siginfo(csigdata, siginfo, compat_siginfo_flags()); \
> + fill_note(note, "CORE", NT_SIGINFO, sizeof(*csigdata), csigdata); \
> +} while (0)
I don't think you are changing the behavior here, but I still wonder if it
is in fact correct for x32: is in_x32_syscall() true here when dumping an
x32 compat elf process, or should this rather be set according to which
binfmt_elf copy is being used?
Arnd
^ permalink raw reply
* [PATCH 22/29] mm: remove the prot argument to __vmalloc_node
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
This is always PAGE_KERNEL now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
mm/vmalloc.c | 35 ++++++++++++++---------------------
1 file changed, 14 insertions(+), 21 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 466a449b3a15..de7952959e82 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2401,8 +2401,7 @@ void *vmap(struct page **pages, unsigned int count,
EXPORT_SYMBOL(vmap);
static void *__vmalloc_node(unsigned long size, unsigned long align,
- gfp_t gfp_mask, pgprot_t prot,
- int node, const void *caller);
+ gfp_t gfp_mask, int node, const void *caller);
static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
pgprot_t prot, int node)
{
@@ -2420,7 +2419,7 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
/* Please note that the recursion is strictly bounded. */
if (array_size > PAGE_SIZE) {
pages = __vmalloc_node(array_size, 1, nested_gfp|highmem_mask,
- PAGE_KERNEL, node, area->caller);
+ node, area->caller);
} else {
pages = kmalloc_node(array_size, nested_gfp, node);
}
@@ -2539,13 +2538,11 @@ EXPORT_SYMBOL_GPL(__vmalloc_node_range);
* @size: allocation size
* @align: desired alignment
* @gfp_mask: flags for the page level allocator
- * @prot: protection mask for the allocated pages
* @node: node to use for allocation or NUMA_NO_NODE
* @caller: caller's return address
*
- * Allocate enough pages to cover @size from the page level
- * allocator with @gfp_mask flags. Map them into contiguous
- * kernel virtual space, using a pagetable protection of @prot.
+ * Allocate enough pages to cover @size from the page level allocator with
+ * @gfp_mask flags. Map them into contiguous kernel virtual space.
*
* Reclaim modifiers in @gfp_mask - __GFP_NORETRY, __GFP_RETRY_MAYFAIL
* and __GFP_NOFAIL are not supported
@@ -2556,16 +2553,15 @@ EXPORT_SYMBOL_GPL(__vmalloc_node_range);
* Return: pointer to the allocated memory or %NULL on error
*/
static void *__vmalloc_node(unsigned long size, unsigned long align,
- gfp_t gfp_mask, pgprot_t prot,
- int node, const void *caller)
+ gfp_t gfp_mask, int node, const void *caller)
{
return __vmalloc_node_range(size, align, VMALLOC_START, VMALLOC_END,
- gfp_mask, prot, 0, node, caller);
+ gfp_mask, PAGE_KERNEL, 0, node, caller);
}
void *__vmalloc(unsigned long size, gfp_t gfp_mask)
{
- return __vmalloc_node(size, 1, gfp_mask, PAGE_KERNEL, NUMA_NO_NODE,
+ return __vmalloc_node(size, 1, gfp_mask, NUMA_NO_NODE,
__builtin_return_address(0));
}
EXPORT_SYMBOL(__vmalloc);
@@ -2573,15 +2569,15 @@ EXPORT_SYMBOL(__vmalloc);
static inline void *__vmalloc_node_flags(unsigned long size,
int node, gfp_t flags)
{
- return __vmalloc_node(size, 1, flags, PAGE_KERNEL,
- node, __builtin_return_address(0));
+ return __vmalloc_node(size, 1, flags, node,
+ __builtin_return_address(0));
}
void *__vmalloc_node_flags_caller(unsigned long size, int node, gfp_t flags,
void *caller)
{
- return __vmalloc_node(size, 1, flags, PAGE_KERNEL, node, caller);
+ return __vmalloc_node(size, 1, flags, node, caller);
}
/**
@@ -2656,8 +2652,8 @@ EXPORT_SYMBOL(vmalloc_user);
*/
void *vmalloc_node(unsigned long size, int node)
{
- return __vmalloc_node(size, 1, GFP_KERNEL, PAGE_KERNEL,
- node, __builtin_return_address(0));
+ return __vmalloc_node(size, 1, GFP_KERNEL, node,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc_node);
@@ -2670,9 +2666,6 @@ EXPORT_SYMBOL(vmalloc_node);
* allocator and map them into contiguous kernel virtual space.
* The memory allocated is set to zero.
*
- * For tight control over page level allocator and protection flags
- * use __vmalloc_node() instead.
- *
* Return: pointer to the allocated memory or %NULL on error
*/
void *vzalloc_node(unsigned long size, int node)
@@ -2745,8 +2738,8 @@ void *vmalloc_exec(unsigned long size)
*/
void *vmalloc_32(unsigned long size)
{
- return __vmalloc_node(size, 1, GFP_VMALLOC32, PAGE_KERNEL,
- NUMA_NO_NODE, __builtin_return_address(0));
+ return __vmalloc_node(size, 1, GFP_VMALLOC32, NUMA_NO_NODE,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc_32);
--
2.25.1
^ permalink raw reply related
* [PATCH 24/29] mm: remove __vmalloc_node_flags_caller
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Just use __vmalloc_node instead which gets and extra argument. To be
able to to use __vmalloc_node in all caller make it available outside
of vmalloc and implement it in nommu.c.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
include/linux/vmalloc.h | 4 ++--
kernel/bpf/syscall.c | 5 ++---
mm/nommu.c | 4 ++--
mm/util.c | 2 +-
mm/vmalloc.c | 10 +---------
5 files changed, 8 insertions(+), 17 deletions(-)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 4a46d296e70d..108f49b47756 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -115,8 +115,8 @@ extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
unsigned long start, unsigned long end, gfp_t gfp_mask,
pgprot_t prot, unsigned long vm_flags, int node,
const void *caller);
-extern void *__vmalloc_node_flags_caller(unsigned long size,
- int node, gfp_t flags, void *caller);
+void *__vmalloc_node(unsigned long size, unsigned long align, gfp_t gfp_mask,
+ int node, const void *caller);
extern void vfree(const void *addr);
extern void vfree_atomic(const void *addr);
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 64783da34202..48d98ea8fad6 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -299,9 +299,8 @@ static void *__bpf_map_area_alloc(u64 size, int numa_node, bool mmapable)
return vmalloc_user_node_flags(size, numa_node, GFP_KERNEL |
__GFP_RETRY_MAYFAIL | flags);
}
- return __vmalloc_node_flags_caller(size, numa_node,
- GFP_KERNEL | __GFP_RETRY_MAYFAIL |
- flags, __builtin_return_address(0));
+ return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_RETRY_MAYFAIL | flags,
+ numa_node, __builtin_return_address(0));
}
void *bpf_map_area_alloc(u64 size, int numa_node)
diff --git a/mm/nommu.c b/mm/nommu.c
index 9553efa59787..81a86cd85893 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -150,8 +150,8 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask)
}
EXPORT_SYMBOL(__vmalloc);
-void *__vmalloc_node_flags_caller(unsigned long size, int node, gfp_t flags,
- void *caller)
+void *__vmalloc_node(unsigned long size, unsigned long align, gfp_t gfp_mask,
+ int node, const void *caller)
{
return __vmalloc(size, flags);
}
diff --git a/mm/util.c b/mm/util.c
index 988d11e6c17c..6d5868adbe18 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -580,7 +580,7 @@ void *kvmalloc_node(size_t size, gfp_t flags, int node)
if (ret || size <= PAGE_SIZE)
return ret;
- return __vmalloc_node_flags_caller(size, node, flags,
+ return __vmalloc_node(size, 1, flags, node,
__builtin_return_address(0));
}
EXPORT_SYMBOL(kvmalloc_node);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 3d59d848ad48..ae8249ef5821 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2400,8 +2400,6 @@ void *vmap(struct page **pages, unsigned int count,
}
EXPORT_SYMBOL(vmap);
-static void *__vmalloc_node(unsigned long size, unsigned long align,
- gfp_t gfp_mask, int node, const void *caller);
static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
pgprot_t prot, int node)
{
@@ -2552,7 +2550,7 @@ EXPORT_SYMBOL_GPL(__vmalloc_node_range);
*
* Return: pointer to the allocated memory or %NULL on error
*/
-static void *__vmalloc_node(unsigned long size, unsigned long align,
+void *__vmalloc_node(unsigned long size, unsigned long align,
gfp_t gfp_mask, int node, const void *caller)
{
return __vmalloc_node_range(size, align, VMALLOC_START, VMALLOC_END,
@@ -2566,12 +2564,6 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask)
}
EXPORT_SYMBOL(__vmalloc);
-void *__vmalloc_node_flags_caller(unsigned long size, int node, gfp_t flags,
- void *caller)
-{
- return __vmalloc_node(size, 1, flags, node, caller);
-}
-
/**
* vmalloc - allocate virtually contiguous memory
* @size: allocation size
--
2.25.1
^ permalink raw reply related
* [PATCH 23/29] mm: remove both instances of __vmalloc_node_flags
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
The real version just had a few callers that can open code it and
remove one layer of indirection. The nommu stub was public but only
had a single caller, so remove it and avoid a CONFIG_MMU ifdef in
vmalloc.h.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
include/linux/vmalloc.h | 9 ---------
mm/nommu.c | 3 ++-
mm/vmalloc.c | 20 ++++++--------------
3 files changed, 8 insertions(+), 24 deletions(-)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index c1b9d6eca05f..4a46d296e70d 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -115,17 +115,8 @@ extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
unsigned long start, unsigned long end, gfp_t gfp_mask,
pgprot_t prot, unsigned long vm_flags, int node,
const void *caller);
-#ifndef CONFIG_MMU
-extern void *__vmalloc_node_flags(unsigned long size, int node, gfp_t flags);
-static inline void *__vmalloc_node_flags_caller(unsigned long size, int node,
- gfp_t flags, void *caller)
-{
- return __vmalloc_node_flags(size, node, flags);
-}
-#else
extern void *__vmalloc_node_flags_caller(unsigned long size,
int node, gfp_t flags, void *caller);
-#endif
extern void vfree(const void *addr);
extern void vfree_atomic(const void *addr);
diff --git a/mm/nommu.c b/mm/nommu.c
index 2df549adb22b..9553efa59787 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -150,7 +150,8 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask)
}
EXPORT_SYMBOL(__vmalloc);
-void *__vmalloc_node_flags(unsigned long size, int node, gfp_t flags)
+void *__vmalloc_node_flags_caller(unsigned long size, int node, gfp_t flags,
+ void *caller)
{
return __vmalloc(size, flags);
}
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index de7952959e82..3d59d848ad48 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2566,14 +2566,6 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask)
}
EXPORT_SYMBOL(__vmalloc);
-static inline void *__vmalloc_node_flags(unsigned long size,
- int node, gfp_t flags)
-{
- return __vmalloc_node(size, 1, flags, node,
- __builtin_return_address(0));
-}
-
-
void *__vmalloc_node_flags_caller(unsigned long size, int node, gfp_t flags,
void *caller)
{
@@ -2594,8 +2586,8 @@ void *__vmalloc_node_flags_caller(unsigned long size, int node, gfp_t flags,
*/
void *vmalloc(unsigned long size)
{
- return __vmalloc_node_flags(size, NUMA_NO_NODE,
- GFP_KERNEL);
+ return __vmalloc_node(size, 1, GFP_KERNEL, NUMA_NO_NODE,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vmalloc);
@@ -2614,8 +2606,8 @@ EXPORT_SYMBOL(vmalloc);
*/
void *vzalloc(unsigned long size)
{
- return __vmalloc_node_flags(size, NUMA_NO_NODE,
- GFP_KERNEL | __GFP_ZERO);
+ return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_ZERO, NUMA_NO_NODE,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vzalloc);
@@ -2670,8 +2662,8 @@ EXPORT_SYMBOL(vmalloc_node);
*/
void *vzalloc_node(unsigned long size, int node)
{
- return __vmalloc_node_flags(size, node,
- GFP_KERNEL | __GFP_ZERO);
+ return __vmalloc_node(size, 1, GFP_KERNEL | __GFP_ZERO, node,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(vzalloc_node);
--
2.25.1
^ permalink raw reply related
* [PATCH 21/29] mm: remove the pgprot argument to __vmalloc
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, Michael Kelley,
linaro-mm-sig, linux-mm, iommu, bpf, Robin Murphy, Gao Xiang,
linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
The pgprot argument to __vmalloc is always PROT_KERNEL now, so remove
it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Kelley <mikelley@microsoft.com> [hyperv]
Acked-by: Gao Xiang <xiang@kernel.org> [erofs]
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/hyperv/hv_init.c | 3 +--
arch/x86/include/asm/kvm_host.h | 3 +--
arch/x86/kvm/svm/sev.c | 3 +--
drivers/block/drbd/drbd_bitmap.c | 4 +---
drivers/gpu/drm/etnaviv/etnaviv_dump.c | 4 ++--
drivers/lightnvm/pblk-init.c | 5 ++---
drivers/md/dm-bufio.c | 4 ++--
drivers/mtd/ubi/io.c | 4 ++--
drivers/scsi/sd_zbc.c | 3 +--
fs/gfs2/dir.c | 9 ++++-----
fs/gfs2/quota.c | 2 +-
fs/nfs/blocklayout/extent_tree.c | 2 +-
fs/ntfs/malloc.h | 2 +-
fs/ubifs/debug.c | 2 +-
fs/ubifs/lprops.c | 2 +-
fs/ubifs/lpt_commit.c | 4 ++--
fs/ubifs/orphan.c | 2 +-
fs/xfs/kmem.c | 2 +-
include/linux/vmalloc.h | 2 +-
kernel/bpf/core.c | 6 +++---
kernel/groups.c | 2 +-
kernel/module.c | 3 +--
mm/nommu.c | 15 +++++++--------
mm/page_alloc.c | 2 +-
mm/percpu.c | 2 +-
mm/vmalloc.c | 4 ++--
net/bridge/netfilter/ebtables.c | 6 ++----
sound/core/memalloc.c | 2 +-
sound/core/pcm_memory.c | 2 +-
29 files changed, 47 insertions(+), 59 deletions(-)
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 5a4b363ba67b..a3d689dfc745 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -95,8 +95,7 @@ static int hv_cpu_init(unsigned int cpu)
* not be stopped in the case of CPU offlining and the VM will hang.
*/
if (!*hvp) {
- *hvp = __vmalloc(PAGE_SIZE, GFP_KERNEL | __GFP_ZERO,
- PAGE_KERNEL);
+ *hvp = __vmalloc(PAGE_SIZE, GFP_KERNEL | __GFP_ZERO);
}
if (*hvp) {
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 42a2d0d3984a..71bc09bff01a 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1280,8 +1280,7 @@ extern struct kmem_cache *x86_fpu_cache;
#define __KVM_HAVE_ARCH_VM_ALLOC
static inline struct kvm *kvm_arch_alloc_vm(void)
{
- return __vmalloc(kvm_x86_ops.vm_size,
- GFP_KERNEL_ACCOUNT | __GFP_ZERO, PAGE_KERNEL);
+ return __vmalloc(kvm_x86_ops.vm_size, GFP_KERNEL_ACCOUNT | __GFP_ZERO);
}
void kvm_arch_free_vm(struct kvm *kvm);
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 0e3fc311d7da..b699e40573ad 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -335,8 +335,7 @@ static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
/* Avoid using vmalloc for smaller buffers. */
size = npages * sizeof(struct page *);
if (size > PAGE_SIZE)
- pages = __vmalloc(size, GFP_KERNEL_ACCOUNT | __GFP_ZERO,
- PAGE_KERNEL);
+ pages = __vmalloc(size, GFP_KERNEL_ACCOUNT | __GFP_ZERO);
else
pages = kmalloc(size, GFP_KERNEL_ACCOUNT);
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index 15e99697234a..df53dca5d02c 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -396,9 +396,7 @@ static struct page **bm_realloc_pages(struct drbd_bitmap *b, unsigned long want)
bytes = sizeof(struct page *)*want;
new_pages = kzalloc(bytes, GFP_NOIO | __GFP_NOWARN);
if (!new_pages) {
- new_pages = __vmalloc(bytes,
- GFP_NOIO | __GFP_ZERO,
- PAGE_KERNEL);
+ new_pages = __vmalloc(bytes, GFP_NOIO | __GFP_ZERO);
if (!new_pages)
return NULL;
}
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_dump.c b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
index 648cf0207309..706af0304ca4 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_dump.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_dump.c
@@ -154,8 +154,8 @@ void etnaviv_core_dump(struct etnaviv_gem_submit *submit)
file_size += sizeof(*iter.hdr) * n_obj;
/* Allocate the file in vmalloc memory, it's likely to be big */
- iter.start = __vmalloc(file_size, GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY,
- PAGE_KERNEL);
+ iter.start = __vmalloc(file_size, GFP_KERNEL | __GFP_NOWARN |
+ __GFP_NORETRY);
if (!iter.start) {
mutex_unlock(&gpu->mmu_context->lock);
dev_warn(gpu->dev, "failed to allocate devcoredump file\n");
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 9a967a2e83dd..6e677ff62cc9 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -145,9 +145,8 @@ static int pblk_l2p_init(struct pblk *pblk, bool factory_init)
int ret = 0;
map_size = pblk_trans_map_size(pblk);
- pblk->trans_map = __vmalloc(map_size, GFP_KERNEL | __GFP_NOWARN
- | __GFP_RETRY_MAYFAIL | __GFP_HIGHMEM,
- PAGE_KERNEL);
+ pblk->trans_map = __vmalloc(map_size, GFP_KERNEL | __GFP_NOWARN |
+ __GFP_RETRY_MAYFAIL | __GFP_HIGHMEM);
if (!pblk->trans_map) {
pblk_err(pblk, "failed to allocate L2P (need %zu of memory)\n",
map_size);
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 2d519c223562..d1786cfd7f22 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -400,13 +400,13 @@ static void *alloc_buffer_data(struct dm_bufio_client *c, gfp_t gfp_mask,
*/
if (gfp_mask & __GFP_NORETRY) {
unsigned noio_flag = memalloc_noio_save();
- void *ptr = __vmalloc(c->block_size, gfp_mask, PAGE_KERNEL);
+ void *ptr = __vmalloc(c->block_size, gfp_mask);
memalloc_noio_restore(noio_flag);
return ptr;
}
- return __vmalloc(c->block_size, gfp_mask, PAGE_KERNEL);
+ return __vmalloc(c->block_size, gfp_mask);
}
/*
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index b57b84fb97d0..14d890b00d2c 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -1297,7 +1297,7 @@ static int self_check_write(struct ubi_device *ubi, const void *buf, int pnum,
if (!ubi_dbg_chk_io(ubi))
return 0;
- buf1 = __vmalloc(len, GFP_NOFS, PAGE_KERNEL);
+ buf1 = __vmalloc(len, GFP_NOFS);
if (!buf1) {
ubi_err(ubi, "cannot allocate memory to check writes");
return 0;
@@ -1361,7 +1361,7 @@ int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
if (!ubi_dbg_chk_io(ubi))
return 0;
- buf = __vmalloc(len, GFP_NOFS, PAGE_KERNEL);
+ buf = __vmalloc(len, GFP_NOFS);
if (!buf) {
ubi_err(ubi, "cannot allocate memory to check for 0xFFs");
return 0;
diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c
index f45c22b09726..8be27426aa66 100644
--- a/drivers/scsi/sd_zbc.c
+++ b/drivers/scsi/sd_zbc.c
@@ -136,8 +136,7 @@ static void *sd_zbc_alloc_report_buffer(struct scsi_disk *sdkp,
while (bufsize >= SECTOR_SIZE) {
buf = __vmalloc(bufsize,
- GFP_KERNEL | __GFP_ZERO | __GFP_NORETRY,
- PAGE_KERNEL);
+ GFP_KERNEL | __GFP_ZERO | __GFP_NORETRY);
if (buf) {
*buflen = bufsize;
return buf;
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index c3f7732415be..c0f2875c946c 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -354,7 +354,7 @@ static __be64 *gfs2_dir_get_hash_table(struct gfs2_inode *ip)
hc = kmalloc(hsize, GFP_NOFS | __GFP_NOWARN);
if (hc == NULL)
- hc = __vmalloc(hsize, GFP_NOFS, PAGE_KERNEL);
+ hc = __vmalloc(hsize, GFP_NOFS);
if (hc == NULL)
return ERR_PTR(-ENOMEM);
@@ -1166,7 +1166,7 @@ static int dir_double_exhash(struct gfs2_inode *dip)
hc2 = kmalloc_array(hsize_bytes, 2, GFP_NOFS | __GFP_NOWARN);
if (hc2 == NULL)
- hc2 = __vmalloc(hsize_bytes * 2, GFP_NOFS, PAGE_KERNEL);
+ hc2 = __vmalloc(hsize_bytes * 2, GFP_NOFS);
if (!hc2)
return -ENOMEM;
@@ -1327,7 +1327,7 @@ static void *gfs2_alloc_sort_buffer(unsigned size)
if (size < KMALLOC_MAX_SIZE)
ptr = kmalloc(size, GFP_NOFS | __GFP_NOWARN);
if (!ptr)
- ptr = __vmalloc(size, GFP_NOFS, PAGE_KERNEL);
+ ptr = __vmalloc(size, GFP_NOFS);
return ptr;
}
@@ -1987,8 +1987,7 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
ht = kzalloc(size, GFP_NOFS | __GFP_NOWARN);
if (ht == NULL)
- ht = __vmalloc(size, GFP_NOFS | __GFP_NOWARN | __GFP_ZERO,
- PAGE_KERNEL);
+ ht = __vmalloc(size, GFP_NOFS | __GFP_NOWARN | __GFP_ZERO);
if (!ht)
return -ENOMEM;
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index cc0c4b5800be..b84ac5843ec4 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1368,7 +1368,7 @@ int gfs2_quota_init(struct gfs2_sbd *sdp)
sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
if (sdp->sd_quota_bitmap == NULL)
sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
- __GFP_ZERO, PAGE_KERNEL);
+ __GFP_ZERO);
if (!sdp->sd_quota_bitmap)
return error;
diff --git a/fs/nfs/blocklayout/extent_tree.c b/fs/nfs/blocklayout/extent_tree.c
index 7a57ff2528af..8f7cff7a4293 100644
--- a/fs/nfs/blocklayout/extent_tree.c
+++ b/fs/nfs/blocklayout/extent_tree.c
@@ -582,7 +582,7 @@ ext_tree_prepare_commit(struct nfs4_layoutcommit_args *arg)
if (!arg->layoutupdate_pages)
return -ENOMEM;
- start_p = __vmalloc(buffer_size, GFP_NOFS, PAGE_KERNEL);
+ start_p = __vmalloc(buffer_size, GFP_NOFS);
if (!start_p) {
kfree(arg->layoutupdate_pages);
return -ENOMEM;
diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h
index 842b0bfc3ac9..7068425735f1 100644
--- a/fs/ntfs/malloc.h
+++ b/fs/ntfs/malloc.h
@@ -34,7 +34,7 @@ static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask)
/* return (void *)__get_free_page(gfp_mask); */
}
if (likely((size >> PAGE_SHIFT) < totalram_pages()))
- return __vmalloc(size, gfp_mask, PAGE_KERNEL);
+ return __vmalloc(size, gfp_mask);
return NULL;
}
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 0f5a480fe264..31288d8fa2ce 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -815,7 +815,7 @@ void ubifs_dump_leb(const struct ubifs_info *c, int lnum)
pr_err("(pid %d) start dumping LEB %d\n", current->pid, lnum);
- buf = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
+ buf = __vmalloc(c->leb_size, GFP_NOFS);
if (!buf) {
ubifs_err(c, "cannot allocate memory for dumping LEB %d", lnum);
return;
diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c
index 29826c51883a..22bfda158f7f 100644
--- a/fs/ubifs/lprops.c
+++ b/fs/ubifs/lprops.c
@@ -1095,7 +1095,7 @@ static int scan_check_cb(struct ubifs_info *c,
return LPT_SCAN_CONTINUE;
}
- buf = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
+ buf = __vmalloc(c->leb_size, GFP_NOFS);
if (!buf)
return -ENOMEM;
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index ff5e0411cf2d..d76a19e460cd 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -1596,7 +1596,7 @@ static int dbg_check_ltab_lnum(struct ubifs_info *c, int lnum)
if (!dbg_is_chk_lprops(c))
return 0;
- buf = p = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
+ buf = p = __vmalloc(c->leb_size, GFP_NOFS);
if (!buf) {
ubifs_err(c, "cannot allocate memory for ltab checking");
return 0;
@@ -1845,7 +1845,7 @@ static void dump_lpt_leb(const struct ubifs_info *c, int lnum)
void *buf, *p;
pr_err("(pid %d) start dumping LEB %d\n", current->pid, lnum);
- buf = p = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
+ buf = p = __vmalloc(c->leb_size, GFP_NOFS);
if (!buf) {
ubifs_err(c, "cannot allocate memory to dump LPT");
return;
diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index 283f9eb48410..2c294085ffed 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -977,7 +977,7 @@ static int dbg_scan_orphans(struct ubifs_info *c, struct check_info *ci)
if (c->no_orphs)
return 0;
- buf = __vmalloc(c->leb_size, GFP_NOFS, PAGE_KERNEL);
+ buf = __vmalloc(c->leb_size, GFP_NOFS);
if (!buf) {
ubifs_err(c, "cannot allocate memory to check orphans");
return 0;
diff --git a/fs/xfs/kmem.c b/fs/xfs/kmem.c
index 1da94237a8cf..f1366475c389 100644
--- a/fs/xfs/kmem.c
+++ b/fs/xfs/kmem.c
@@ -48,7 +48,7 @@ __kmem_vmalloc(size_t size, xfs_km_flags_t flags)
if (flags & KM_NOFS)
nofs_flag = memalloc_nofs_save();
- ptr = __vmalloc(size, lflags, PAGE_KERNEL);
+ ptr = __vmalloc(size, lflags);
if (flags & KM_NOFS)
memalloc_nofs_restore(nofs_flag);
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 9273b1a91ca5..c1b9d6eca05f 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -110,7 +110,7 @@ extern void *vmalloc_user_node_flags(unsigned long size, int node, gfp_t flags);
extern void *vmalloc_exec(unsigned long size);
extern void *vmalloc_32(unsigned long size);
extern void *vmalloc_32_user(unsigned long size);
-extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
+extern void *__vmalloc(unsigned long size, gfp_t gfp_mask);
extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
unsigned long start, unsigned long end, gfp_t gfp_mask,
pgprot_t prot, unsigned long vm_flags, int node,
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 916f5132a984..c712de560357 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -82,7 +82,7 @@ struct bpf_prog *bpf_prog_alloc_no_stats(unsigned int size, gfp_t gfp_extra_flag
struct bpf_prog *fp;
size = round_up(size, PAGE_SIZE);
- fp = __vmalloc(size, gfp_flags, PAGE_KERNEL);
+ fp = __vmalloc(size, gfp_flags);
if (fp == NULL)
return NULL;
@@ -232,7 +232,7 @@ struct bpf_prog *bpf_prog_realloc(struct bpf_prog *fp_old, unsigned int size,
if (ret)
return NULL;
- fp = __vmalloc(size, gfp_flags, PAGE_KERNEL);
+ fp = __vmalloc(size, gfp_flags);
if (fp == NULL) {
__bpf_prog_uncharge(fp_old->aux->user, delta);
} else {
@@ -1089,7 +1089,7 @@ static struct bpf_prog *bpf_prog_clone_create(struct bpf_prog *fp_other,
gfp_t gfp_flags = GFP_KERNEL | __GFP_ZERO | gfp_extra_flags;
struct bpf_prog *fp;
- fp = __vmalloc(fp_other->pages * PAGE_SIZE, gfp_flags, PAGE_KERNEL);
+ fp = __vmalloc(fp_other->pages * PAGE_SIZE, gfp_flags);
if (fp != NULL) {
/* aux->prog still points to the fp_other one, so
* when promoting the clone to the real program,
diff --git a/kernel/groups.c b/kernel/groups.c
index daae2f2dc6d4..6ee6691f6839 100644
--- a/kernel/groups.c
+++ b/kernel/groups.c
@@ -20,7 +20,7 @@ struct group_info *groups_alloc(int gidsetsize)
len = sizeof(struct group_info) + sizeof(kgid_t) * gidsetsize;
gi = kmalloc(len, GFP_KERNEL_ACCOUNT|__GFP_NOWARN|__GFP_NORETRY);
if (!gi)
- gi = __vmalloc(len, GFP_KERNEL_ACCOUNT, PAGE_KERNEL);
+ gi = __vmalloc(len, GFP_KERNEL_ACCOUNT);
if (!gi)
return NULL;
diff --git a/kernel/module.c b/kernel/module.c
index 646f1e2330d2..086618a0058f 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2946,8 +2946,7 @@ static int copy_module_from_user(const void __user *umod, unsigned long len,
return err;
/* Suck in entire file: we'll want most of it. */
- info->hdr = __vmalloc(info->len,
- GFP_KERNEL | __GFP_NOWARN, PAGE_KERNEL);
+ info->hdr = __vmalloc(info->len, GFP_KERNEL | __GFP_NOWARN);
if (!info->hdr)
return -ENOMEM;
diff --git a/mm/nommu.c b/mm/nommu.c
index 4f07b7ef0297..2df549adb22b 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -140,7 +140,7 @@ void vfree(const void *addr)
}
EXPORT_SYMBOL(vfree);
-void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
+void *__vmalloc(unsigned long size, gfp_t gfp_mask)
{
/*
* You can't specify __GFP_HIGHMEM with kmalloc() since kmalloc()
@@ -152,14 +152,14 @@ EXPORT_SYMBOL(__vmalloc);
void *__vmalloc_node_flags(unsigned long size, int node, gfp_t flags)
{
- return __vmalloc(size, flags, PAGE_KERNEL);
+ return __vmalloc(size, flags);
}
static void *__vmalloc_user_flags(unsigned long size, gfp_t flags)
{
void *ret;
- ret = __vmalloc(size, flags, PAGE_KERNEL);
+ ret = __vmalloc(size, flags);
if (ret) {
struct vm_area_struct *vma;
@@ -230,7 +230,7 @@ long vwrite(char *buf, char *addr, unsigned long count)
*/
void *vmalloc(unsigned long size)
{
- return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL);
+ return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM);
}
EXPORT_SYMBOL(vmalloc);
@@ -248,8 +248,7 @@ EXPORT_SYMBOL(vmalloc);
*/
void *vzalloc(unsigned long size)
{
- return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO,
- PAGE_KERNEL);
+ return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
}
EXPORT_SYMBOL(vzalloc);
@@ -302,7 +301,7 @@ EXPORT_SYMBOL(vzalloc_node);
void *vmalloc_exec(unsigned long size)
{
- return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL_EXEC);
+ return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM);
}
/**
@@ -314,7 +313,7 @@ void *vmalloc_exec(unsigned long size)
*/
void *vmalloc_32(unsigned long size)
{
- return __vmalloc(size, GFP_KERNEL, PAGE_KERNEL);
+ return __vmalloc(size, GFP_KERNEL);
}
EXPORT_SYMBOL(vmalloc_32);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 69827d4fa052..d4379026cc63 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8238,7 +8238,7 @@ void *__init alloc_large_system_hash(const char *tablename,
table = memblock_alloc_raw(size,
SMP_CACHE_BYTES);
} else if (get_order(size) >= MAX_ORDER || hashdist) {
- table = __vmalloc(size, gfp_flags, PAGE_KERNEL);
+ table = __vmalloc(size, gfp_flags);
virt = true;
} else {
/*
diff --git a/mm/percpu.c b/mm/percpu.c
index d7e3bc649f4e..1e278099e185 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -481,7 +481,7 @@ static void *pcpu_mem_zalloc(size_t size, gfp_t gfp)
if (size <= PAGE_SIZE)
return kzalloc(size, gfp);
else
- return __vmalloc(size, gfp | __GFP_ZERO, PAGE_KERNEL);
+ return __vmalloc(size, gfp | __GFP_ZERO);
}
/**
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 334c75251ddb..466a449b3a15 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2563,9 +2563,9 @@ static void *__vmalloc_node(unsigned long size, unsigned long align,
gfp_mask, prot, 0, node, caller);
}
-void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
+void *__vmalloc(unsigned long size, gfp_t gfp_mask)
{
- return __vmalloc_node(size, 1, gfp_mask, prot, NUMA_NO_NODE,
+ return __vmalloc_node(size, 1, gfp_mask, PAGE_KERNEL, NUMA_NO_NODE,
__builtin_return_address(0));
}
EXPORT_SYMBOL(__vmalloc);
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 78db58c7aec2..7e869284e052 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1095,16 +1095,14 @@ static int do_replace(struct net *net, const void __user *user,
tmp.name[sizeof(tmp.name) - 1] = 0;
countersize = COUNTER_OFFSET(tmp.nentries) * nr_cpu_ids;
- newinfo = __vmalloc(sizeof(*newinfo) + countersize, GFP_KERNEL_ACCOUNT,
- PAGE_KERNEL);
+ newinfo = __vmalloc(sizeof(*newinfo) + countersize, GFP_KERNEL_ACCOUNT);
if (!newinfo)
return -ENOMEM;
if (countersize)
memset(newinfo->counters, 0, countersize);
- newinfo->entries = __vmalloc(tmp.entries_size, GFP_KERNEL_ACCOUNT,
- PAGE_KERNEL);
+ newinfo->entries = __vmalloc(tmp.entries_size, GFP_KERNEL_ACCOUNT);
if (!newinfo->entries) {
ret = -ENOMEM;
goto free_newinfo;
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c
index a83553fbedf0..bea46ed157a6 100644
--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -143,7 +143,7 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size,
break;
case SNDRV_DMA_TYPE_VMALLOC:
gfp = snd_mem_get_gfp_flags(device, GFP_KERNEL | __GFP_HIGHMEM);
- dmab->area = __vmalloc(size, gfp, PAGE_KERNEL);
+ dmab->area = __vmalloc(size, gfp);
dmab->addr = 0;
break;
#ifdef CONFIG_HAS_DMA
diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c
index fcab37ea6641..860935e3aea4 100644
--- a/sound/core/pcm_memory.c
+++ b/sound/core/pcm_memory.c
@@ -460,7 +460,7 @@ int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
return 0; /* already large enough */
vfree(runtime->dma_area);
}
- runtime->dma_area = __vmalloc(size, gfp_flags, PAGE_KERNEL);
+ runtime->dma_area = __vmalloc(size, gfp_flags);
if (!runtime->dma_area)
return -ENOMEM;
runtime->dma_bytes = size;
--
2.25.1
^ permalink raw reply related
* [PATCH 20/29] gpu/drm: remove the powerpc hack in drm_legacy_sg_alloc
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, Daniel Vetter, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
The non-cached vmalloc mapping was initially added as a hack for the
first-gen amigaone platform (6xx/book32s), isn't fully supported
upstream, and which used the legacy radeon driver together with
non-coherent DMA. However this only ever worked reliably for DRI .
Remove the hack as it is the last user of __vmalloc passing a page
protection flag other than PAGE_KERNEL and didn't do anything for
other platforms with non-coherent DMA.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
drivers/gpu/drm/drm_scatter.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/drm_scatter.c b/drivers/gpu/drm/drm_scatter.c
index ca520028b2cb..f4e6184d1877 100644
--- a/drivers/gpu/drm/drm_scatter.c
+++ b/drivers/gpu/drm/drm_scatter.c
@@ -43,15 +43,6 @@
#define DEBUG_SCATTER 0
-static inline void *drm_vmalloc_dma(unsigned long size)
-{
-#if defined(__powerpc__) && defined(CONFIG_NOT_COHERENT_CACHE)
- return __vmalloc(size, GFP_KERNEL, pgprot_noncached_wc(PAGE_KERNEL));
-#else
- return vmalloc_32(size);
-#endif
-}
-
static void drm_sg_cleanup(struct drm_sg_mem * entry)
{
struct page *page;
@@ -126,7 +117,7 @@ int drm_legacy_sg_alloc(struct drm_device *dev, void *data,
return -ENOMEM;
}
- entry->virtual = drm_vmalloc_dma(pages << PAGE_SHIFT);
+ entry->virtual = vmalloc_32(pages << PAGE_SHIFT);
if (!entry->virtual) {
kfree(entry->busaddr);
kfree(entry->pagelist);
--
2.25.1
^ permalink raw reply related
* [PATCH 19/29] mm: enforce that vmap can't map pages executable
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
To help enforcing the W^X protection don't allow remapping existing
pages as executable.
x86 bits from Peter Zijlstra <peterz@infradead.org>,
arm64 bits from Mark Rutland <mark.rutland@arm.com>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/arm64/include/asm/pgtable.h | 3 +++
arch/x86/include/asm/pgtable_types.h | 6 ++++++
include/asm-generic/pgtable.h | 4 ++++
mm/vmalloc.c | 2 +-
4 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 538c85e62f86..47095216d6a8 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -407,6 +407,9 @@ static inline pmd_t pmd_mkdevmap(pmd_t pmd)
#define __pgprot_modify(prot,mask,bits) \
__pgprot((pgprot_val(prot) & ~(mask)) | (bits))
+#define pgprot_nx(prot) \
+ __pgprot_modify(prot, 0, PTE_PXN)
+
/*
* Mark the prot value as uncacheable and unbufferable.
*/
diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h
index 947867f112ea..2e7c442cc618 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -282,6 +282,12 @@ typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
typedef struct { pgdval_t pgd; } pgd_t;
+static inline pgprot_t pgprot_nx(pgprot_t prot)
+{
+ return __pgprot(pgprot_val(prot) | _PAGE_NX);
+}
+#define pgprot_nx pgprot_nx
+
#ifdef CONFIG_X86_PAE
/*
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 329b8c8ca703..8c5f9c29698b 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -491,6 +491,10 @@ static inline int arch_unmap_one(struct mm_struct *mm,
#define flush_tlb_fix_spurious_fault(vma, address) flush_tlb_page(vma, address)
#endif
+#ifndef pgprot_nx
+#define pgprot_nx(prot) (prot)
+#endif
+
#ifndef pgprot_noncached
#define pgprot_noncached(prot) (prot)
#endif
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 7356b3f07bd8..334c75251ddb 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2390,7 +2390,7 @@ void *vmap(struct page **pages, unsigned int count,
if (!area)
return NULL;
- if (map_kernel_range((unsigned long)area->addr, size, prot,
+ if (map_kernel_range((unsigned long)area->addr, size, pgprot_nx(prot),
pages) < 0) {
vunmap(area->addr);
return NULL;
--
2.25.1
^ permalink raw reply related
* [PATCH 18/29] mm: remove the prot argument from vm_map_ram
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
This is always PAGE_KERNEL - for long term mappings with other
properties vmap should be used.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c | 2 +-
drivers/media/common/videobuf2/videobuf2-dma-sg.c | 3 +--
drivers/media/common/videobuf2/videobuf2-vmalloc.c | 3 +--
fs/erofs/decompressor.c | 2 +-
fs/xfs/xfs_buf.c | 2 +-
include/linux/vmalloc.h | 3 +--
mm/nommu.c | 2 +-
mm/vmalloc.c | 4 ++--
8 files changed, 9 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c b/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
index 9272bef57092..debaf7b18ab5 100644
--- a/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
+++ b/drivers/gpu/drm/i915/gem/selftests/mock_dmabuf.c
@@ -66,7 +66,7 @@ static void *mock_dmabuf_vmap(struct dma_buf *dma_buf)
{
struct mock_dmabuf *mock = to_mock(dma_buf);
- return vm_map_ram(mock->pages, mock->npages, 0, PAGE_KERNEL);
+ return vm_map_ram(mock->pages, mock->npages, 0);
}
static void mock_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
index 6db60e9d5183..92072a08af25 100644
--- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c
+++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c
@@ -309,8 +309,7 @@ static void *vb2_dma_sg_vaddr(void *buf_priv)
if (buf->db_attach)
buf->vaddr = dma_buf_vmap(buf->db_attach->dmabuf);
else
- buf->vaddr = vm_map_ram(buf->pages,
- buf->num_pages, -1, PAGE_KERNEL);
+ buf->vaddr = vm_map_ram(buf->pages, buf->num_pages, -1);
}
/* add offset in case userptr is not page-aligned */
diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
index 1a4f0ca87c7c..c66fda4a65e4 100644
--- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c
+++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c
@@ -107,8 +107,7 @@ static void *vb2_vmalloc_get_userptr(struct device *dev, unsigned long vaddr,
buf->vaddr = (__force void *)
ioremap(__pfn_to_phys(nums[0]), size + offset);
} else {
- buf->vaddr = vm_map_ram(frame_vector_pages(vec), n_pages, -1,
- PAGE_KERNEL);
+ buf->vaddr = vm_map_ram(frame_vector_pages(vec), n_pages, -1);
}
if (!buf->vaddr)
diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c
index 5d2d81940679..7628816f2453 100644
--- a/fs/erofs/decompressor.c
+++ b/fs/erofs/decompressor.c
@@ -274,7 +274,7 @@ static int z_erofs_decompress_generic(struct z_erofs_decompress_req *rq,
i = 0;
while (1) {
- dst = vm_map_ram(rq->out, nrpages_out, -1, PAGE_KERNEL);
+ dst = vm_map_ram(rq->out, nrpages_out, -1);
/* retry two more times (totally 3 times) */
if (dst || ++i >= 3)
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 9ec3eaf1c618..65538d18e64f 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -477,7 +477,7 @@ _xfs_buf_map_pages(
nofs_flag = memalloc_nofs_save();
do {
bp->b_addr = vm_map_ram(bp->b_pages, bp->b_page_count,
- -1, PAGE_KERNEL);
+ -1);
if (bp->b_addr)
break;
vm_unmap_aliases();
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 15ffbd8e8e65..9273b1a91ca5 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -88,8 +88,7 @@ struct vmap_area {
* Highlevel APIs for driver use
*/
extern void vm_unmap_ram(const void *mem, unsigned int count);
-extern void *vm_map_ram(struct page **pages, unsigned int count,
- int node, pgprot_t prot);
+extern void *vm_map_ram(struct page **pages, unsigned int count, int node);
extern void vm_unmap_aliases(void);
#ifdef CONFIG_MMU
diff --git a/mm/nommu.c b/mm/nommu.c
index 318df4e236c9..4f07b7ef0297 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -351,7 +351,7 @@ void vunmap(const void *addr)
}
EXPORT_SYMBOL(vunmap);
-void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t prot)
+void *vm_map_ram(struct page **pages, unsigned int count, int node)
{
BUG();
return NULL;
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 258220b203f1..7356b3f07bd8 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1834,7 +1834,7 @@ EXPORT_SYMBOL(vm_unmap_ram);
*
* Returns: a pointer to the address that has been mapped, or %NULL on failure
*/
-void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t prot)
+void *vm_map_ram(struct page **pages, unsigned int count, int node)
{
unsigned long size = (unsigned long)count << PAGE_SHIFT;
unsigned long addr;
@@ -1858,7 +1858,7 @@ void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t pro
kasan_unpoison_vmalloc(mem, size);
- if (map_kernel_range(addr, size, prot, pages) < 0) {
+ if (map_kernel_range(addr, size, PAGE_KERNEL, pages) < 0) {
vm_unmap_ram(mem, count);
return NULL;
}
--
2.25.1
^ permalink raw reply related
* [PATCH 17/29] mm: remove unmap_vmap_area
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
This function just has a single caller, open code it there.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
mm/vmalloc.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index b0c7cdc8701a..258220b203f1 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1247,14 +1247,6 @@ int unregister_vmap_purge_notifier(struct notifier_block *nb)
}
EXPORT_SYMBOL_GPL(unregister_vmap_purge_notifier);
-/*
- * Clear the pagetable entries of a given vmap_area
- */
-static void unmap_vmap_area(struct vmap_area *va)
-{
- unmap_kernel_range_noflush(va->va_start, va->va_end - va->va_start);
-}
-
/*
* lazy_max_pages is the maximum amount of virtual address space we gather up
* before attempting to purge with a TLB flush.
@@ -1416,7 +1408,7 @@ static void free_vmap_area_noflush(struct vmap_area *va)
static void free_unmap_vmap_area(struct vmap_area *va)
{
flush_cache_vunmap(va->va_start, va->va_end);
- unmap_vmap_area(va);
+ unmap_kernel_range_noflush(va->va_start, va->va_end - va->va_start);
if (debug_pagealloc_enabled_static())
flush_tlb_kernel_range(va->va_start, va->va_end);
--
2.25.1
^ permalink raw reply related
* [PATCH 16/29] mm: remove map_vm_range
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Switch all callers to map_kernel_range, which symmetric to the unmap
side (as well as the _noflush versions).
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
Documentation/core-api/cachetlb.rst | 2 +-
include/linux/vmalloc.h | 10 ++++------
mm/vmalloc.c | 21 +++++++--------------
mm/zsmalloc.c | 4 +++-
net/ceph/ceph_common.c | 3 +--
5 files changed, 16 insertions(+), 24 deletions(-)
diff --git a/Documentation/core-api/cachetlb.rst b/Documentation/core-api/cachetlb.rst
index 93cb65d52720..a1582cc79f0f 100644
--- a/Documentation/core-api/cachetlb.rst
+++ b/Documentation/core-api/cachetlb.rst
@@ -213,7 +213,7 @@ Here are the routines, one by one:
there will be no entries in the cache for the kernel address
space for virtual addresses in the range 'start' to 'end-1'.
- The first of these two routines is invoked after map_vm_area()
+ The first of these two routines is invoked after map_kernel_range()
has installed the page table entries. The second is invoked
before unmap_kernel_range() deletes the page table entries.
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 3070b4dbc2d9..15ffbd8e8e65 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -168,11 +168,11 @@ extern struct vm_struct *__get_vm_area_caller(unsigned long size,
extern struct vm_struct *remove_vm_area(const void *addr);
extern struct vm_struct *find_vm_area(const void *addr);
-extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
- struct page **pages);
#ifdef CONFIG_MMU
extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
pgprot_t prot, struct page **pages);
+int map_kernel_range(unsigned long start, unsigned long size, pgprot_t prot,
+ struct page **pages);
extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size);
extern void unmap_kernel_range(unsigned long addr, unsigned long size);
static inline void set_vm_flush_reset_perms(void *addr)
@@ -189,14 +189,12 @@ map_kernel_range_noflush(unsigned long start, unsigned long size,
{
return size >> PAGE_SHIFT;
}
+#define map_kernel_range map_kernel_range_noflush
static inline void
unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
{
}
-static inline void
-unmap_kernel_range(unsigned long addr, unsigned long size)
-{
-}
+#define unmap_kernel_range unmap_kernel_range_noflush
static inline void set_vm_flush_reset_perms(void *addr)
{
}
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index ca8dc5d42580..b0c7cdc8701a 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -272,8 +272,8 @@ int map_kernel_range_noflush(unsigned long addr, unsigned long size,
return 0;
}
-static int map_kernel_range(unsigned long start, unsigned long size,
- pgprot_t prot, struct page **pages)
+int map_kernel_range(unsigned long start, unsigned long size, pgprot_t prot,
+ struct page **pages)
{
int ret;
@@ -2027,16 +2027,6 @@ void unmap_kernel_range(unsigned long addr, unsigned long size)
flush_tlb_kernel_range(addr, end);
}
-int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pages)
-{
- unsigned long addr = (unsigned long)area->addr;
- int err;
-
- err = map_kernel_range(addr, get_vm_area_size(area), prot, pages);
-
- return err > 0 ? 0 : err;
-}
-
static inline void setup_vmalloc_vm_locked(struct vm_struct *vm,
struct vmap_area *va, unsigned long flags, const void *caller)
{
@@ -2408,7 +2398,8 @@ void *vmap(struct page **pages, unsigned int count,
if (!area)
return NULL;
- if (map_vm_area(area, prot, pages)) {
+ if (map_kernel_range((unsigned long)area->addr, size, prot,
+ pages) < 0) {
vunmap(area->addr);
return NULL;
}
@@ -2471,8 +2462,10 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
}
atomic_long_add(area->nr_pages, &nr_vmalloc_pages);
- if (map_vm_area(area, prot, pages))
+ if (map_kernel_range((unsigned long)area->addr, get_vm_area_size(area),
+ prot, pages) < 0)
goto fail;
+
return area->addr;
fail:
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index ac0524330b9b..f6dc0673e62c 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1138,7 +1138,9 @@ static inline void __zs_cpu_down(struct mapping_area *area)
static inline void *__zs_map_object(struct mapping_area *area,
struct page *pages[2], int off, int size)
{
- BUG_ON(map_vm_area(area->vm, PAGE_KERNEL, pages));
+ unsigned long addr = (unsigned long)area->vm->addr;
+
+ BUG_ON(map_kernel_range(addr, PAGE_SIZE * 2, PAGE_KERNEL, pages) < 0);
area->vm_addr = area->vm->addr;
return area->vm_addr + off;
}
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index a0e97f6c1072..66f22e8aa529 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -190,8 +190,7 @@ EXPORT_SYMBOL(ceph_compare_options);
* kvmalloc() doesn't fall back to the vmalloc allocator unless flags are
* compatible with (a superset of) GFP_KERNEL. This is because while the
* actual pages are allocated with the specified flags, the page table pages
- * are always allocated with GFP_KERNEL. map_vm_area() doesn't even take
- * flags because GFP_KERNEL is hard-coded in {p4d,pud,pmd,pte}_alloc().
+ * are always allocated with GFP_KERNEL.
*
* ceph_kvmalloc() may be called with GFP_KERNEL, GFP_NOFS or GFP_NOIO.
*/
--
2.25.1
^ permalink raw reply related
* [PATCH 15/29] mm: don't return the number of pages from map_kernel_range{, _noflush}
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
None of the callers needs the number of pages, and a 0 / -errno return
value is a lot more intuitive.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
mm/vmalloc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index a3d810def567..ca8dc5d42580 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -249,7 +249,7 @@ static int vmap_p4d_range(pgd_t *pgd, unsigned long addr,
* function.
*
* RETURNS:
- * The number of pages mapped on success, -errno on failure.
+ * 0 on success, -errno on failure.
*/
int map_kernel_range_noflush(unsigned long addr, unsigned long size,
pgprot_t prot, struct page **pages)
@@ -269,7 +269,7 @@ int map_kernel_range_noflush(unsigned long addr, unsigned long size,
return err;
} while (pgd++, addr = next, addr != end);
- return nr;
+ return 0;
}
static int map_kernel_range(unsigned long start, unsigned long size,
--
2.25.1
^ permalink raw reply related
* [PATCH 13/29] mm: remove vmap_page_range_noflush and vunmap_page_range
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
These have non-static aliases called map_kernel_range_noflush and
unmap_kernel_range_noflush that just differ slightly in the calling
conventions that pass addr + size instead of an end.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
mm/vmalloc.c | 98 +++++++++++++++++++++-------------------------------
1 file changed, 40 insertions(+), 58 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index aada9e9144bd..55df5dc6a9fc 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -127,10 +127,24 @@ static void vunmap_p4d_range(pgd_t *pgd, unsigned long addr, unsigned long end)
} while (p4d++, addr = next, addr != end);
}
-static void vunmap_page_range(unsigned long addr, unsigned long end)
+/**
+ * unmap_kernel_range_noflush - unmap kernel VM area
+ * @addr: start of the VM area to unmap
+ * @size: size of the VM area to unmap
+ *
+ * Unmap PFN_UP(@size) pages at @addr. The VM area @addr and @size specify
+ * should have been allocated using get_vm_area() and its friends.
+ *
+ * NOTE:
+ * This function does NOT do any cache flushing. The caller is responsible
+ * for calling flush_cache_vunmap() on to-be-mapped areas before calling this
+ * function and flush_tlb_kernel_range() after.
+ */
+void unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
{
- pgd_t *pgd;
+ unsigned long end = addr + size;
unsigned long next;
+ pgd_t *pgd;
BUG_ON(addr >= end);
pgd = pgd_offset_k(addr);
@@ -219,18 +233,30 @@ static int vmap_p4d_range(pgd_t *pgd, unsigned long addr,
return 0;
}
-/*
- * Set up page tables in kva (addr, end). The ptes shall have prot "prot", and
- * will have pfns corresponding to the "pages" array.
+/**
+ * map_kernel_range_noflush - map kernel VM area with the specified pages
+ * @addr: start of the VM area to map
+ * @size: size of the VM area to map
+ * @prot: page protection flags to use
+ * @pages: pages to map
*
- * Ie. pte at addr+N*PAGE_SIZE shall point to pfn corresponding to pages[N]
+ * Map PFN_UP(@size) pages at @addr. The VM area @addr and @size specify should
+ * have been allocated using get_vm_area() and its friends.
+ *
+ * NOTE:
+ * This function does NOT do any cache flushing. The caller is responsible for
+ * calling flush_cache_vmap() on to-be-mapped areas before calling this
+ * function.
+ *
+ * RETURNS:
+ * The number of pages mapped on success, -errno on failure.
*/
-static int vmap_page_range_noflush(unsigned long start, unsigned long end,
- pgprot_t prot, struct page **pages)
+int map_kernel_range_noflush(unsigned long addr, unsigned long size,
+ pgprot_t prot, struct page **pages)
{
- pgd_t *pgd;
+ unsigned long end = addr + size;
unsigned long next;
- unsigned long addr = start;
+ pgd_t *pgd;
int err = 0;
int nr = 0;
@@ -251,7 +277,7 @@ static int vmap_page_range(unsigned long start, unsigned long end,
{
int ret;
- ret = vmap_page_range_noflush(start, end, prot, pages);
+ ret = map_kernel_range_noflush(start, end - start, prot, pages);
flush_cache_vmap(start, end);
return ret;
}
@@ -1226,7 +1252,7 @@ EXPORT_SYMBOL_GPL(unregister_vmap_purge_notifier);
*/
static void unmap_vmap_area(struct vmap_area *va)
{
- vunmap_page_range(va->va_start, va->va_end);
+ unmap_kernel_range_noflush(va->va_start, va->va_end - va->va_start);
}
/*
@@ -1686,7 +1712,7 @@ static void vb_free(unsigned long addr, unsigned long size)
rcu_read_unlock();
BUG_ON(!vb);
- vunmap_page_range(addr, addr + size);
+ unmap_kernel_range_noflush(addr, size);
if (debug_pagealloc_enabled_static())
flush_tlb_kernel_range(addr, addr + size);
@@ -1984,50 +2010,6 @@ void __init vmalloc_init(void)
vmap_initialized = true;
}
-/**
- * map_kernel_range_noflush - map kernel VM area with the specified pages
- * @addr: start of the VM area to map
- * @size: size of the VM area to map
- * @prot: page protection flags to use
- * @pages: pages to map
- *
- * Map PFN_UP(@size) pages at @addr. The VM area @addr and @size
- * specify should have been allocated using get_vm_area() and its
- * friends.
- *
- * NOTE:
- * This function does NOT do any cache flushing. The caller is
- * responsible for calling flush_cache_vmap() on to-be-mapped areas
- * before calling this function.
- *
- * RETURNS:
- * The number of pages mapped on success, -errno on failure.
- */
-int map_kernel_range_noflush(unsigned long addr, unsigned long size,
- pgprot_t prot, struct page **pages)
-{
- return vmap_page_range_noflush(addr, addr + size, prot, pages);
-}
-
-/**
- * unmap_kernel_range_noflush - unmap kernel VM area
- * @addr: start of the VM area to unmap
- * @size: size of the VM area to unmap
- *
- * Unmap PFN_UP(@size) pages at @addr. The VM area @addr and @size
- * specify should have been allocated using get_vm_area() and its
- * friends.
- *
- * NOTE:
- * This function does NOT do any cache flushing. The caller is
- * responsible for calling flush_cache_vunmap() on to-be-mapped areas
- * before calling this function and flush_tlb_kernel_range() after.
- */
-void unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
-{
- vunmap_page_range(addr, addr + size);
-}
-
/**
* unmap_kernel_range - unmap kernel VM area and flush cache and TLB
* @addr: start of the VM area to unmap
@@ -2041,7 +2023,7 @@ void unmap_kernel_range(unsigned long addr, unsigned long size)
unsigned long end = addr + size;
flush_cache_vunmap(addr, end);
- vunmap_page_range(addr, end);
+ unmap_kernel_range_noflush(addr, size);
flush_tlb_kernel_range(addr, end);
}
--
2.25.1
^ permalink raw reply related
* [PATCH 14/29] mm: rename vmap_page_range to map_kernel_range
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
This matches the map_kernel_range_noflush API. Also change to pass
a size instead of the end, similar to the noflush version.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
mm/vmalloc.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 55df5dc6a9fc..a3d810def567 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -272,13 +272,13 @@ int map_kernel_range_noflush(unsigned long addr, unsigned long size,
return nr;
}
-static int vmap_page_range(unsigned long start, unsigned long end,
+static int map_kernel_range(unsigned long start, unsigned long size,
pgprot_t prot, struct page **pages)
{
int ret;
- ret = map_kernel_range_noflush(start, end - start, prot, pages);
- flush_cache_vmap(start, end);
+ ret = map_kernel_range_noflush(start, size, prot, pages);
+ flush_cache_vmap(start, start + size);
return ret;
}
@@ -1866,7 +1866,7 @@ void *vm_map_ram(struct page **pages, unsigned int count, int node, pgprot_t pro
kasan_unpoison_vmalloc(mem, size);
- if (vmap_page_range(addr, addr + size, prot, pages) < 0) {
+ if (map_kernel_range(addr, size, prot, pages) < 0) {
vm_unmap_ram(mem, count);
return NULL;
}
@@ -2030,10 +2030,9 @@ void unmap_kernel_range(unsigned long addr, unsigned long size)
int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pages)
{
unsigned long addr = (unsigned long)area->addr;
- unsigned long end = addr + get_vm_area_size(area);
int err;
- err = vmap_page_range(addr, end, prot, pages);
+ err = map_kernel_range(addr, get_vm_area_size(area), prot, pages);
return err > 0 ? 0 : err;
}
--
2.25.1
^ permalink raw reply related
* [PATCH 12/29] mm: pass addr as unsigned long to vb_free
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Ever use of addr in vb_free casts to unsigned long first, and the caller
has an unsigned long version of the address available anyway. Just pass
that and avoid all the casts.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
mm/vmalloc.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9183fc0d365a..aada9e9144bd 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1664,7 +1664,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask)
return vaddr;
}
-static void vb_free(const void *addr, unsigned long size)
+static void vb_free(unsigned long addr, unsigned long size)
{
unsigned long offset;
unsigned long vb_idx;
@@ -1674,24 +1674,22 @@ static void vb_free(const void *addr, unsigned long size)
BUG_ON(offset_in_page(size));
BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC);
- flush_cache_vunmap((unsigned long)addr, (unsigned long)addr + size);
+ flush_cache_vunmap(addr, addr + size);
order = get_order(size);
- offset = (unsigned long)addr & (VMAP_BLOCK_SIZE - 1);
- offset >>= PAGE_SHIFT;
+ offset = (addr & (VMAP_BLOCK_SIZE - 1)) >> PAGE_SHIFT;
- vb_idx = addr_to_vb_idx((unsigned long)addr);
+ vb_idx = addr_to_vb_idx(addr);
rcu_read_lock();
vb = radix_tree_lookup(&vmap_block_tree, vb_idx);
rcu_read_unlock();
BUG_ON(!vb);
- vunmap_page_range((unsigned long)addr, (unsigned long)addr + size);
+ vunmap_page_range(addr, addr + size);
if (debug_pagealloc_enabled_static())
- flush_tlb_kernel_range((unsigned long)addr,
- (unsigned long)addr + size);
+ flush_tlb_kernel_range(addr, addr + size);
spin_lock(&vb->lock);
@@ -1791,7 +1789,7 @@ void vm_unmap_ram(const void *mem, unsigned int count)
if (likely(count <= VMAP_MAX_ALLOC)) {
debug_check_no_locks_freed(mem, size);
- vb_free(mem, size);
+ vb_free(addr, size);
return;
}
--
2.25.1
^ permalink raw reply related
* [PATCH 11/29] mm: only allow page table mappings for built-in zsmalloc
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
This allows to unexport map_vm_area and unmap_kernel_range, which are
rather deep internal and should not be available to modules, as they for
example allow fine grained control of mapping permissions, and also
allow splitting the setup of a vmalloc area and the actual mapping and
thus expose vmalloc internals.
zsmalloc is typically built-in and continues to work (just like the
percpu-vm code using a similar patter), while modular zsmalloc also
continues to work, but must use copies.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
mm/Kconfig | 2 +-
mm/vmalloc.c | 2 --
2 files changed, 1 insertion(+), 3 deletions(-)
diff --git a/mm/Kconfig b/mm/Kconfig
index 09a9edfb8461..5c0362bd8d56 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -707,7 +707,7 @@ config ZSMALLOC
config ZSMALLOC_PGTABLE_MAPPING
bool "Use page table mapping to access object in zsmalloc"
- depends on ZSMALLOC
+ depends on ZSMALLOC=y
help
By default, zsmalloc uses a copy-based object mapping method to
access allocations that span two pages. However, if a particular
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 3375f9508ef6..9183fc0d365a 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2046,7 +2046,6 @@ void unmap_kernel_range(unsigned long addr, unsigned long size)
vunmap_page_range(addr, end);
flush_tlb_kernel_range(addr, end);
}
-EXPORT_SYMBOL_GPL(unmap_kernel_range);
int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pages)
{
@@ -2058,7 +2057,6 @@ int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pages)
return err > 0 ? 0 : err;
}
-EXPORT_SYMBOL_GPL(map_vm_area);
static inline void setup_vmalloc_vm_locked(struct vm_struct *vm,
struct vmap_area *va, unsigned long flags, const void *caller)
--
2.25.1
^ permalink raw reply related
* [PATCH 09/29] mm: unexport unmap_kernel_range_noflush
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
There are no modular users of this function.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
mm/vmalloc.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d1534d610b48..3375f9508ef6 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2029,7 +2029,6 @@ void unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
{
vunmap_page_range(addr, addr + size);
}
-EXPORT_SYMBOL_GPL(unmap_kernel_range_noflush);
/**
* unmap_kernel_range - unmap kernel VM area and flush cache and TLB
--
2.25.1
^ permalink raw reply related
* [PATCH 10/29] mm: rename CONFIG_PGTABLE_MAPPING to CONFIG_ZSMALLOC_PGTABLE_MAPPING
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Rename the Kconfig variable to clarify the scope.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/arm/configs/omap2plus_defconfig | 2 +-
include/linux/zsmalloc.h | 2 +-
mm/Kconfig | 2 +-
mm/zsmalloc.c | 8 ++++----
4 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index 3cc3ca5fa027..583d8abd80a4 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -81,7 +81,7 @@ CONFIG_PARTITION_ADVANCED=y
CONFIG_BINFMT_MISC=y
CONFIG_CMA=y
CONFIG_ZSMALLOC=m
-CONFIG_PGTABLE_MAPPING=y
+CONFIG_ZSMALLOC_PGTABLE_MAPPING=y
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
diff --git a/include/linux/zsmalloc.h b/include/linux/zsmalloc.h
index 2219cce81ca4..0fdbf653b173 100644
--- a/include/linux/zsmalloc.h
+++ b/include/linux/zsmalloc.h
@@ -20,7 +20,7 @@
* zsmalloc mapping modes
*
* NOTE: These only make a difference when a mapped object spans pages.
- * They also have no effect when PGTABLE_MAPPING is selected.
+ * They also have no effect when ZSMALLOC_PGTABLE_MAPPING is selected.
*/
enum zs_mapmode {
ZS_MM_RW, /* normal read-write mapping */
diff --git a/mm/Kconfig b/mm/Kconfig
index c1acc34c1c35..09a9edfb8461 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -705,7 +705,7 @@ config ZSMALLOC
returned by an alloc(). This handle must be mapped in order to
access the allocated space.
-config PGTABLE_MAPPING
+config ZSMALLOC_PGTABLE_MAPPING
bool "Use page table mapping to access object in zsmalloc"
depends on ZSMALLOC
help
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2f836a2b993f..ac0524330b9b 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -293,7 +293,7 @@ struct zspage {
};
struct mapping_area {
-#ifdef CONFIG_PGTABLE_MAPPING
+#ifdef CONFIG_ZSMALLOC_PGTABLE_MAPPING
struct vm_struct *vm; /* vm area for mapping object that span pages */
#else
char *vm_buf; /* copy buffer for objects that span pages */
@@ -1113,7 +1113,7 @@ static struct zspage *find_get_zspage(struct size_class *class)
return zspage;
}
-#ifdef CONFIG_PGTABLE_MAPPING
+#ifdef CONFIG_ZSMALLOC_PGTABLE_MAPPING
static inline int __zs_cpu_up(struct mapping_area *area)
{
/*
@@ -1151,7 +1151,7 @@ static inline void __zs_unmap_object(struct mapping_area *area,
unmap_kernel_range(addr, PAGE_SIZE * 2);
}
-#else /* CONFIG_PGTABLE_MAPPING */
+#else /* CONFIG_ZSMALLOC_PGTABLE_MAPPING */
static inline int __zs_cpu_up(struct mapping_area *area)
{
@@ -1233,7 +1233,7 @@ static void __zs_unmap_object(struct mapping_area *area,
pagefault_enable();
}
-#endif /* CONFIG_PGTABLE_MAPPING */
+#endif /* CONFIG_ZSMALLOC_PGTABLE_MAPPING */
static int zs_cpu_prepare(unsigned int cpu)
{
--
2.25.1
^ permalink raw reply related
* [PATCH 08/29] mm: remove __get_vm_area
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Switch the two remaining callers to use __get_vm_area_caller instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/powerpc/kernel/pci_64.c | 3 ++-
arch/sh/kernel/cpu/sh4/sq.c | 3 ++-
include/linux/vmalloc.h | 2 --
mm/vmalloc.c | 8 --------
4 files changed, 4 insertions(+), 12 deletions(-)
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 2a976314f169..d9ac980c398c 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -132,7 +132,8 @@ void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size)
* address decoding but I'd rather not deal with those outside of the
* reserved 64K legacy region.
*/
- area = __get_vm_area(size, 0, PHB_IO_BASE, PHB_IO_END);
+ area = __get_vm_area_caller(size, 0, PHB_IO_BASE, PHB_IO_END,
+ __builtin_return_address(0));
if (!area)
return NULL;
diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
index 934ff84844fa..d432164b23b7 100644
--- a/arch/sh/kernel/cpu/sh4/sq.c
+++ b/arch/sh/kernel/cpu/sh4/sq.c
@@ -103,7 +103,8 @@ static int __sq_remap(struct sq_mapping *map, pgprot_t prot)
#if defined(CONFIG_MMU)
struct vm_struct *vma;
- vma = __get_vm_area(map->size, VM_ALLOC, map->sq_addr, SQ_ADDRMAX);
+ vma = __get_vm_area_caller(map->size, VM_ALLOC, map->sq_addr,
+ SQ_ADDRMAX, __builtin_return_address(0));
if (!vma)
return -ENOMEM;
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 0507a162ccd0..3070b4dbc2d9 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -161,8 +161,6 @@ static inline size_t get_vm_area_size(const struct vm_struct *area)
extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
extern struct vm_struct *get_vm_area_caller(unsigned long size,
unsigned long flags, const void *caller);
-extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
- unsigned long start, unsigned long end);
extern struct vm_struct *__get_vm_area_caller(unsigned long size,
unsigned long flags,
unsigned long start, unsigned long end,
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 399f219544f7..d1534d610b48 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2127,14 +2127,6 @@ static struct vm_struct *__get_vm_area_node(unsigned long size,
return area;
}
-struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
- unsigned long start, unsigned long end)
-{
- return __get_vm_area_node(size, 1, flags, start, end, NUMA_NO_NODE,
- GFP_KERNEL, __builtin_return_address(0));
-}
-EXPORT_SYMBOL_GPL(__get_vm_area);
-
struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
unsigned long start, unsigned long end,
const void *caller)
--
2.25.1
^ permalink raw reply related
* [PATCH 07/29] powerpc: remove __ioremap_at and __iounmap_at
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
These helpers are only used for remapping the ISA I/O base. Replace
the mapping side with a remap_isa_range helper in isa-bridge.c that
hard codes all the known arguments, and just remove __iounmap_at in
favour of open coding it in the only caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/powerpc/include/asm/io.h | 8 -----
arch/powerpc/kernel/isa-bridge.c | 28 +++++++++++++-----
arch/powerpc/mm/ioremap_64.c | 50 --------------------------------
3 files changed, 21 insertions(+), 65 deletions(-)
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 91320985d33f..13f90dd03450 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -699,10 +699,6 @@ static inline void iosync(void)
*
* * iounmap undoes such a mapping and can be hooked
*
- * * __ioremap_at (and the pending __iounmap_at) are low level functions to
- * create hand-made mappings for use only by the PCI code and cannot
- * currently be hooked. Must be page aligned.
- *
* * __ioremap_caller is the same as above but takes an explicit caller
* reference rather than using __builtin_return_address(0)
*
@@ -729,10 +725,6 @@ void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size,
extern void __iomem *__ioremap_caller(phys_addr_t, unsigned long size,
pgprot_t prot, void *caller);
-extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea,
- unsigned long size, pgprot_t prot);
-extern void __iounmap_at(void *ea, unsigned long size);
-
/*
* When CONFIG_PPC_INDIRECT_PIO is set, we use the generic iomap implementation
* which needs some additional definitions here. They basically allow PIO
diff --git a/arch/powerpc/kernel/isa-bridge.c b/arch/powerpc/kernel/isa-bridge.c
index 773671b512df..2257d24e6a26 100644
--- a/arch/powerpc/kernel/isa-bridge.c
+++ b/arch/powerpc/kernel/isa-bridge.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/notifier.h>
+#include <linux/vmalloc.h>
#include <asm/processor.h>
#include <asm/io.h>
@@ -38,6 +39,22 @@ EXPORT_SYMBOL_GPL(isa_bridge_pcidev);
#define ISA_SPACE_MASK 0x1
#define ISA_SPACE_IO 0x1
+static void remap_isa_base(phys_addr_t pa, unsigned long size)
+{
+ WARN_ON_ONCE(ISA_IO_BASE & ~PAGE_MASK);
+ WARN_ON_ONCE(pa & ~PAGE_MASK);
+ WARN_ON_ONCE(size & ~PAGE_MASK);
+
+ if (slab_is_available()) {
+ if (ioremap_page_range(ISA_IO_BASE, ISA_IO_BASE + size, pa,
+ pgprot_noncached(PAGE_KERNEL)))
+ unmap_kernel_range(ISA_IO_BASE, size);
+ } else {
+ early_ioremap_range(ISA_IO_BASE, pa, size,
+ pgprot_noncached(PAGE_KERNEL));
+ }
+}
+
static void pci_process_ISA_OF_ranges(struct device_node *isa_node,
unsigned long phb_io_base_phys)
{
@@ -105,15 +122,13 @@ static void pci_process_ISA_OF_ranges(struct device_node *isa_node,
if (size > 0x10000)
size = 0x10000;
- __ioremap_at(phb_io_base_phys, (void *)ISA_IO_BASE,
- size, pgprot_noncached(PAGE_KERNEL));
+ remap_isa_base(phb_io_base_phys, size);
return;
inval_range:
printk(KERN_ERR "no ISA IO ranges or unexpected isa range, "
"mapping 64k\n");
- __ioremap_at(phb_io_base_phys, (void *)ISA_IO_BASE,
- 0x10000, pgprot_noncached(PAGE_KERNEL));
+ remap_isa_base(phb_io_base_phys, 0x10000);
}
@@ -248,8 +263,7 @@ void __init isa_bridge_init_non_pci(struct device_node *np)
* and map it
*/
isa_io_base = ISA_IO_BASE;
- __ioremap_at(pbase, (void *)ISA_IO_BASE,
- size, pgprot_noncached(PAGE_KERNEL));
+ remap_isa_base(pbase, size);
pr_debug("ISA: Non-PCI bridge is %pOF\n", np);
}
@@ -297,7 +311,7 @@ static void isa_bridge_remove(void)
isa_bridge_pcidev = NULL;
/* Unmap the ISA area */
- __iounmap_at((void *)ISA_IO_BASE, 0x10000);
+ unmap_kernel_range(ISA_IO_BASE, 0x10000);
}
/**
diff --git a/arch/powerpc/mm/ioremap_64.c b/arch/powerpc/mm/ioremap_64.c
index 50a99d9684f7..ba5cbb0d66bd 100644
--- a/arch/powerpc/mm/ioremap_64.c
+++ b/arch/powerpc/mm/ioremap_64.c
@@ -4,56 +4,6 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
-/**
- * Low level function to establish the page tables for an IO mapping
- */
-void __iomem *__ioremap_at(phys_addr_t pa, void *ea, unsigned long size, pgprot_t prot)
-{
- int ret;
- unsigned long va = (unsigned long)ea;
-
- /* We don't support the 4K PFN hack with ioremap */
- if (pgprot_val(prot) & H_PAGE_4K_PFN)
- return NULL;
-
- if ((ea + size) >= (void *)IOREMAP_END) {
- pr_warn("Outside the supported range\n");
- return NULL;
- }
-
- WARN_ON(pa & ~PAGE_MASK);
- WARN_ON(((unsigned long)ea) & ~PAGE_MASK);
- WARN_ON(size & ~PAGE_MASK);
-
- if (slab_is_available()) {
- ret = ioremap_page_range(va, va + size, pa, prot);
- if (ret)
- unmap_kernel_range(va, size);
- } else {
- ret = early_ioremap_range(va, pa, size, prot);
- }
-
- if (ret)
- return NULL;
-
- return (void __iomem *)ea;
-}
-EXPORT_SYMBOL(__ioremap_at);
-
-/**
- * Low level function to tear down the page tables for an IO mapping. This is
- * used for mappings that are manipulated manually, like partial unmapping of
- * PCI IOs or ISA space.
- */
-void __iounmap_at(void *ea, unsigned long size)
-{
- WARN_ON(((unsigned long)ea) & ~PAGE_MASK);
- WARN_ON(size & ~PAGE_MASK);
-
- unmap_kernel_range((unsigned long)ea, size);
-}
-EXPORT_SYMBOL(__iounmap_at);
-
void __iomem *__ioremap_caller(phys_addr_t addr, unsigned long size,
pgprot_t prot, void *caller)
{
--
2.25.1
^ permalink raw reply related
* [PATCH 06/29] powerpc: add an ioremap_phb helper
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Factor code shared between pci_64 and electra_cf into a ioremap_pbh
helper that follows the normal ioremap semantics, and returns a
useful __iomem pointer. Note that it opencodes __ioremap_at as
we know from the callers the slab is available. Switch pci_64
to also store the result as __iomem pointer, and unmap the result
using iounmap instead of force casting and using vmalloc APIs.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/powerpc/include/asm/io.h | 2 +
arch/powerpc/include/asm/pci-bridge.h | 2 +-
arch/powerpc/kernel/pci_64.c | 53 ++++++++++++++++++---------
drivers/pcmcia/electra_cf.c | 45 ++++++++---------------
4 files changed, 54 insertions(+), 48 deletions(-)
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 635969b5b58e..91320985d33f 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -719,6 +719,8 @@ void __iomem *ioremap_coherent(phys_addr_t address, unsigned long size);
extern void iounmap(volatile void __iomem *addr);
+void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size);
+
int early_ioremap_range(unsigned long ea, phys_addr_t pa,
unsigned long size, pgprot_t prot);
void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size,
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 69f4cb3b7c56..b92e81b256e5 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -66,7 +66,7 @@ struct pci_controller {
void __iomem *io_base_virt;
#ifdef CONFIG_PPC64
- void *io_base_alloc;
+ void __iomem *io_base_alloc;
#endif
resource_size_t io_base_phys;
resource_size_t pci_io_size;
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index f83d1f69b1dd..2a976314f169 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -109,23 +109,46 @@ int pcibios_unmap_io_space(struct pci_bus *bus)
/* Get the host bridge */
hose = pci_bus_to_host(bus);
- /* Check if we have IOs allocated */
- if (hose->io_base_alloc == NULL)
- return 0;
-
pr_debug("IO unmapping for PHB %pOF\n", hose->dn);
pr_debug(" alloc=0x%p\n", hose->io_base_alloc);
- /* This is a PHB, we fully unmap the IO area */
- vunmap(hose->io_base_alloc);
-
+ iounmap(hose->io_base_alloc);
return 0;
}
EXPORT_SYMBOL_GPL(pcibios_unmap_io_space);
-static int pcibios_map_phb_io_space(struct pci_controller *hose)
+void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size)
{
struct vm_struct *area;
+ unsigned long addr;
+
+ WARN_ON_ONCE(paddr & ~PAGE_MASK);
+ WARN_ON_ONCE(size & ~PAGE_MASK);
+
+ /*
+ * Let's allocate some IO space for that guy. We don't pass VM_IOREMAP
+ * because we don't care about alignment tricks that the core does in
+ * that case. Maybe we should due to stupid card with incomplete
+ * address decoding but I'd rather not deal with those outside of the
+ * reserved 64K legacy region.
+ */
+ area = __get_vm_area(size, 0, PHB_IO_BASE, PHB_IO_END);
+ if (!area)
+ return NULL;
+
+ addr = (unsigned long)area->addr;
+ if (ioremap_page_range(addr, addr + size, paddr,
+ pgprot_noncached(PAGE_KERNEL))) {
+ unmap_kernel_range(addr, size);
+ return NULL;
+ }
+
+ return (void __iomem *)addr;
+}
+EXPORT_SYMBOL_GPL(ioremap_phb);
+
+static int pcibios_map_phb_io_space(struct pci_controller *hose)
+{
unsigned long phys_page;
unsigned long size_page;
unsigned long io_virt_offset;
@@ -146,12 +169,11 @@ static int pcibios_map_phb_io_space(struct pci_controller *hose)
* with incomplete address decoding but I'd rather not deal with
* those outside of the reserved 64K legacy region.
*/
- area = __get_vm_area(size_page, 0, PHB_IO_BASE, PHB_IO_END);
- if (area == NULL)
+ hose->io_base_alloc = ioremap_phb(phys_page, size_page);
+ if (!hose->io_base_alloc)
return -ENOMEM;
- hose->io_base_alloc = area->addr;
- hose->io_base_virt = (void __iomem *)(area->addr +
- hose->io_base_phys - phys_page);
+ hose->io_base_virt = hose->io_base_alloc +
+ hose->io_base_phys - phys_page;
pr_debug("IO mapping for PHB %pOF\n", hose->dn);
pr_debug(" phys=0x%016llx, virt=0x%p (alloc=0x%p)\n",
@@ -159,11 +181,6 @@ static int pcibios_map_phb_io_space(struct pci_controller *hose)
pr_debug(" size=0x%016llx (alloc=0x%016lx)\n",
hose->pci_io_size, size_page);
- /* Establish the mapping */
- if (__ioremap_at(phys_page, area->addr, size_page,
- pgprot_noncached(PAGE_KERNEL)) == NULL)
- return -ENOMEM;
-
/* Fixup hose IO resource */
io_virt_offset = pcibios_io_space_offset(hose);
hose->io_resource.start += io_virt_offset;
diff --git a/drivers/pcmcia/electra_cf.c b/drivers/pcmcia/electra_cf.c
index f2741c04289d..35158cfd9c1a 100644
--- a/drivers/pcmcia/electra_cf.c
+++ b/drivers/pcmcia/electra_cf.c
@@ -178,10 +178,9 @@ static int electra_cf_probe(struct platform_device *ofdev)
struct device_node *np = ofdev->dev.of_node;
struct electra_cf_socket *cf;
struct resource mem, io;
- int status;
+ int status = -ENOMEM;
const unsigned int *prop;
int err;
- struct vm_struct *area;
err = of_address_to_resource(np, 0, &mem);
if (err)
@@ -202,30 +201,19 @@ static int electra_cf_probe(struct platform_device *ofdev)
cf->mem_phys = mem.start;
cf->mem_size = PAGE_ALIGN(resource_size(&mem));
cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
+ if (!cf->mem_base)
+ goto out_free_cf;
cf->io_size = PAGE_ALIGN(resource_size(&io));
-
- area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
- if (area == NULL) {
- status = -ENOMEM;
- goto fail1;
- }
-
- cf->io_virt = (void __iomem *)(area->addr);
+ cf->io_virt = ioremap_phb(io.start, cf->io_size);
+ if (!cf->io_virt)
+ goto out_unmap_mem;
cf->gpio_base = ioremap(0xfc103000, 0x1000);
+ if (!cf->gpio_base)
+ goto out_unmap_virt;
dev_set_drvdata(device, cf);
- if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
- (__ioremap_at(io.start, cf->io_virt, cf->io_size,
- pgprot_noncached(PAGE_KERNEL)) == NULL)) {
- dev_err(device, "can't ioremap ranges\n");
- status = -ENOMEM;
- goto fail1;
- }
-
-
cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
-
cf->iomem.start = (unsigned long)cf->mem_base;
cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
cf->iomem.flags = IORESOURCE_MEM;
@@ -305,14 +293,13 @@ static int electra_cf_probe(struct platform_device *ofdev)
if (cf->irq)
free_irq(cf->irq, cf);
- if (cf->io_virt)
- __iounmap_at(cf->io_virt, cf->io_size);
- if (cf->mem_base)
- iounmap(cf->mem_base);
- if (cf->gpio_base)
- iounmap(cf->gpio_base);
- if (area)
- device_init_wakeup(&ofdev->dev, 0);
+ iounmap(cf->gpio_base);
+out_unmap_virt:
+ device_init_wakeup(&ofdev->dev, 0);
+ iounmap(cf->io_virt);
+out_unmap_mem:
+ iounmap(cf->mem_base);
+out_free_cf:
kfree(cf);
return status;
@@ -330,7 +317,7 @@ static int electra_cf_remove(struct platform_device *ofdev)
free_irq(cf->irq, cf);
del_timer_sync(&cf->timer);
- __iounmap_at(cf->io_virt, cf->io_size);
+ iounmap(cf->io_virt);
iounmap(cf->mem_base);
iounmap(cf->gpio_base);
release_mem_region(cf->mem_phys, cf->mem_size);
--
2.25.1
^ permalink raw reply related
* [PATCH 05/29] dma-mapping: use vmap insted of reimplementing it
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Replace the open coded instance of vmap with the actual function. In
the non-contiguous (IOMMU) case this requires an extra find_vm_area,
but given that this isn't a fast path function that is a small price
to pay.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
kernel/dma/remap.c | 48 ++++++++++++----------------------------------
1 file changed, 12 insertions(+), 36 deletions(-)
diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c
index d14cbc83986a..914ff5a58dd5 100644
--- a/kernel/dma/remap.c
+++ b/kernel/dma/remap.c
@@ -20,23 +20,6 @@ struct page **dma_common_find_pages(void *cpu_addr)
return area->pages;
}
-static struct vm_struct *__dma_common_pages_remap(struct page **pages,
- size_t size, pgprot_t prot, const void *caller)
-{
- struct vm_struct *area;
-
- area = get_vm_area_caller(size, VM_DMA_COHERENT, caller);
- if (!area)
- return NULL;
-
- if (map_vm_area(area, prot, pages)) {
- vunmap(area->addr);
- return NULL;
- }
-
- return area;
-}
-
/*
* Remaps an array of PAGE_SIZE pages into another vm_area.
* Cannot be used in non-sleeping contexts
@@ -44,15 +27,12 @@ static struct vm_struct *__dma_common_pages_remap(struct page **pages,
void *dma_common_pages_remap(struct page **pages, size_t size,
pgprot_t prot, const void *caller)
{
- struct vm_struct *area;
+ void *vaddr;
- area = __dma_common_pages_remap(pages, size, prot, caller);
- if (!area)
- return NULL;
-
- area->pages = pages;
-
- return area->addr;
+ vaddr = vmap(pages, size >> PAGE_SHIFT, VM_DMA_COHERENT, prot);
+ if (vaddr)
+ find_vm_area(vaddr)->pages = pages;
+ return vaddr;
}
/*
@@ -62,24 +42,20 @@ void *dma_common_pages_remap(struct page **pages, size_t size,
void *dma_common_contiguous_remap(struct page *page, size_t size,
pgprot_t prot, const void *caller)
{
- int i;
+ int count = size >> PAGE_SHIFT;
struct page **pages;
- struct vm_struct *area;
+ void *vaddr;
+ int i;
- pages = kmalloc(sizeof(struct page *) << get_order(size), GFP_KERNEL);
+ pages = kmalloc_array(count, sizeof(struct page *), GFP_KERNEL);
if (!pages)
return NULL;
-
- for (i = 0; i < (size >> PAGE_SHIFT); i++)
+ for (i = 0; i < count; i++)
pages[i] = nth_page(page, i);
-
- area = __dma_common_pages_remap(pages, size, prot, caller);
-
+ vaddr = vmap(pages, count, VM_DMA_COHERENT, prot);
kfree(pages);
- if (!area)
- return NULL;
- return area->addr;
+ return vaddr;
}
/*
--
2.25.1
^ permalink raw reply related
* [PATCH 04/29] staging: media: ipu3: use vmap instead of reimplementing it
From: Christoph Hellwig @ 2020-04-14 13:13 UTC (permalink / raw)
To: Andrew Morton, K. Y. Srinivasan, Haiyang Zhang, Stephen Hemminger,
Wei Liu, x86, David Airlie, Daniel Vetter, Laura Abbott,
Sumit Semwal, Sakari Ailus, Minchan Kim, Nitin Gupta
Cc: linux-arch, linux-hyperv, linux-s390, Peter Zijlstra,
linuxppc-dev, linux-kernel, dri-devel, linaro-mm-sig, linux-mm,
iommu, bpf, Robin Murphy, linux-arm-kernel
In-Reply-To: <20200414131348.444715-1-hch@lst.de>
Just use vmap instead of messing with vmalloc internals.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
drivers/staging/media/ipu3/ipu3-css-pool.h | 4 +--
drivers/staging/media/ipu3/ipu3-dmamap.c | 30 ++++++----------------
2 files changed, 9 insertions(+), 25 deletions(-)
diff --git a/drivers/staging/media/ipu3/ipu3-css-pool.h b/drivers/staging/media/ipu3/ipu3-css-pool.h
index f4a60b41401b..a8ccd4f70320 100644
--- a/drivers/staging/media/ipu3/ipu3-css-pool.h
+++ b/drivers/staging/media/ipu3/ipu3-css-pool.h
@@ -15,14 +15,12 @@ struct imgu_device;
* @size: size of the buffer in bytes.
* @vaddr: kernel virtual address.
* @daddr: iova dma address to access IPU3.
- * @vma: private, a pointer to &struct vm_struct,
- * used for imgu_dmamap_free.
*/
struct imgu_css_map {
size_t size;
void *vaddr;
dma_addr_t daddr;
- struct vm_struct *vma;
+ struct page **pages;
};
/**
diff --git a/drivers/staging/media/ipu3/ipu3-dmamap.c b/drivers/staging/media/ipu3/ipu3-dmamap.c
index 7431322379f6..8a19b0024152 100644
--- a/drivers/staging/media/ipu3/ipu3-dmamap.c
+++ b/drivers/staging/media/ipu3/ipu3-dmamap.c
@@ -96,6 +96,7 @@ void *imgu_dmamap_alloc(struct imgu_device *imgu, struct imgu_css_map *map,
unsigned long shift = iova_shift(&imgu->iova_domain);
struct device *dev = &imgu->pci_dev->dev;
size_t size = PAGE_ALIGN(len);
+ int count = size >> PAGE_SHIFT;
struct page **pages;
dma_addr_t iovaddr;
struct iova *iova;
@@ -114,7 +115,7 @@ void *imgu_dmamap_alloc(struct imgu_device *imgu, struct imgu_css_map *map,
/* Call IOMMU driver to setup pgt */
iovaddr = iova_dma_addr(&imgu->iova_domain, iova);
- for (i = 0; i < size / PAGE_SIZE; ++i) {
+ for (i = 0; i < count; ++i) {
rval = imgu_mmu_map(imgu->mmu, iovaddr,
page_to_phys(pages[i]), PAGE_SIZE);
if (rval)
@@ -123,33 +124,23 @@ void *imgu_dmamap_alloc(struct imgu_device *imgu, struct imgu_css_map *map,
iovaddr += PAGE_SIZE;
}
- /* Now grab a virtual region */
- map->vma = __get_vm_area(size, VM_USERMAP, VMALLOC_START, VMALLOC_END);
- if (!map->vma)
+ map->vaddr = vmap(pages, count, VM_USERMAP, PAGE_KERNEL);
+ if (!map->vaddr)
goto out_unmap;
- map->vma->pages = pages;
- /* And map it in KVA */
- if (map_vm_area(map->vma, PAGE_KERNEL, pages))
- goto out_vunmap;
-
+ map->pages = pages;
map->size = size;
map->daddr = iova_dma_addr(&imgu->iova_domain, iova);
- map->vaddr = map->vma->addr;
dev_dbg(dev, "%s: allocated %zu @ IOVA %pad @ VA %p\n", __func__,
- size, &map->daddr, map->vma->addr);
-
- return map->vma->addr;
+ size, &map->daddr, map->vaddr);
-out_vunmap:
- vunmap(map->vma->addr);
+ return map->vaddr;
out_unmap:
imgu_dmamap_free_buffer(pages, size);
imgu_mmu_unmap(imgu->mmu, iova_dma_addr(&imgu->iova_domain, iova),
i * PAGE_SIZE);
- map->vma = NULL;
out_free_iova:
__free_iova(&imgu->iova_domain, iova);
@@ -177,8 +168,6 @@ void imgu_dmamap_unmap(struct imgu_device *imgu, struct imgu_css_map *map)
*/
void imgu_dmamap_free(struct imgu_device *imgu, struct imgu_css_map *map)
{
- struct vm_struct *area = map->vma;
-
dev_dbg(&imgu->pci_dev->dev, "%s: freeing %zu @ IOVA %pad @ VA %p\n",
__func__, map->size, &map->daddr, map->vaddr);
@@ -187,11 +176,8 @@ void imgu_dmamap_free(struct imgu_device *imgu, struct imgu_css_map *map)
imgu_dmamap_unmap(imgu, map);
- if (WARN_ON(!area) || WARN_ON(!area->pages))
- return;
-
- imgu_dmamap_free_buffer(area->pages, map->size);
vunmap(map->vaddr);
+ imgu_dmamap_free_buffer(map->pages, map->size);
map->vaddr = NULL;
}
--
2.25.1
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