From: ira.weiny@intel.com
To: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Christian Koenig <christian.koenig@amd.com>,
Huang Rui <ray.huang@amd.com>
Cc: Ira Weiny <ira.weiny@intel.com>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
Helge Deller <deller@gmx.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
"David S. Miller" <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Chris Zankel <chris@zankel.net>,
Max Filippov <jcmvbkbc@gmail.com>,
Dan Williams <dan.j.williams@intel.com>,
linux-snps-arc@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org,
linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org,
linux-xtensa@linux-xtensa.org, dri-devel@lists.freedesktop.org
Subject: [PATCH V2 10/11] arch/kmap: Define kmap_atomic_prot() for all arch's
Date: Sun, 3 May 2020 18:09:11 -0700 [thread overview]
Message-ID: <20200504010912.982044-11-ira.weiny@intel.com> (raw)
In-Reply-To: <20200504010912.982044-1-ira.weiny@intel.com>
From: Ira Weiny <ira.weiny@intel.com>
To support kmap_atomic_prot(), all architectures need to support
protections passed to their kmap_atomic_high() function. Pass
protections into kmap_atomic_high() and change the name to
kmap_atomic_high_prot() to match.
Then define kmap_atomic_prot() as a core function which calls
kmap_atomic_high_prot() when needed.
Finally, redefine kmap_atomic() as a wrapper of kmap_atomic_prot() with
the default kmap_prot exported by the architectures.
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
Changes from V1:
Adjust for bisect-ability
Adjust for removing kunmap_atomic_high
Remove kmap_atomic_high_prot declarations
---
arch/arc/mm/highmem.c | 6 +++---
arch/arm/mm/highmem.c | 6 +++---
arch/csky/mm/highmem.c | 6 +++---
arch/microblaze/include/asm/highmem.h | 16 ----------------
arch/mips/mm/highmem.c | 6 +++---
arch/nds32/mm/highmem.c | 6 +++---
arch/powerpc/include/asm/highmem.h | 17 -----------------
arch/sparc/mm/highmem.c | 6 +++---
arch/x86/include/asm/highmem.h | 14 --------------
arch/xtensa/mm/highmem.c | 6 +++---
include/linux/highmem.h | 7 ++++---
11 files changed, 25 insertions(+), 71 deletions(-)
diff --git a/arch/arc/mm/highmem.c b/arch/arc/mm/highmem.c
index 5d3eab4ac0b0..479b0d72d3cf 100644
--- a/arch/arc/mm/highmem.c
+++ b/arch/arc/mm/highmem.c
@@ -49,7 +49,7 @@
extern pte_t * pkmap_page_table;
static pte_t * fixmap_page_table;
-void *kmap_atomic_high(struct page *page)
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
{
int idx, cpu_idx;
unsigned long vaddr;
@@ -59,11 +59,11 @@ void *kmap_atomic_high(struct page *page)
vaddr = FIXMAP_ADDR(idx);
set_pte_at(&init_mm, vaddr, fixmap_page_table + idx,
- mk_pte(page, kmap_prot));
+ mk_pte(page, prot));
return (void *)vaddr;
}
-EXPORT_SYMBOL(kmap_atomic_high);
+EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kv)
{
diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c
index ac8394655a6e..e013f6b81328 100644
--- a/arch/arm/mm/highmem.c
+++ b/arch/arm/mm/highmem.c
@@ -31,7 +31,7 @@ static inline pte_t get_fixmap_pte(unsigned long vaddr)
return *ptep;
}
-void *kmap_atomic_high(struct page *page)
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
{
unsigned int idx;
unsigned long vaddr;
@@ -67,11 +67,11 @@ void *kmap_atomic_high(struct page *page)
* in place, so the contained TLB flush ensures the TLB is updated
* with the new mapping.
*/
- set_fixmap_pte(idx, mk_pte(page, kmap_prot));
+ set_fixmap_pte(idx, mk_pte(page, prot));
return (void *)vaddr;
}
-EXPORT_SYMBOL(kmap_atomic_high);
+EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr)
{
diff --git a/arch/csky/mm/highmem.c b/arch/csky/mm/highmem.c
index f4311669b5bb..3ae5c8cd7619 100644
--- a/arch/csky/mm/highmem.c
+++ b/arch/csky/mm/highmem.c
@@ -21,7 +21,7 @@ EXPORT_SYMBOL(kmap_flush_tlb);
EXPORT_SYMBOL(kmap);
-void *kmap_atomic_high(struct page *page)
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
{
unsigned long vaddr;
int idx, type;
@@ -32,12 +32,12 @@ void *kmap_atomic_high(struct page *page)
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte - idx)));
#endif
- set_pte(kmap_pte-idx, mk_pte(page, kmap_prot));
+ set_pte(kmap_pte-idx, mk_pte(page, prot));
flush_tlb_one((unsigned long)vaddr);
return (void *)vaddr;
}
-EXPORT_SYMBOL(kmap_atomic_high);
+EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr)
{
diff --git a/arch/microblaze/include/asm/highmem.h b/arch/microblaze/include/asm/highmem.h
index 033ac5b5c2da..d7c55cfd27bd 100644
--- a/arch/microblaze/include/asm/highmem.h
+++ b/arch/microblaze/include/asm/highmem.h
@@ -51,22 +51,6 @@ extern pte_t *pkmap_page_table;
#define PKMAP_NR(virt) ((virt - PKMAP_BASE) >> PAGE_SHIFT)
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
-extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot);
-void *kmap_atomic_prot(struct page *page, pgprot_t prot)
-{
- preempt_disable();
- pagefault_disable();
- if (!PageHighMem(page))
- return page_address(page);
-
- return kmap_atomic_high_prot(page, prot);
-}
-
-static inline void *kmap_atomic_high(struct page *page)
-{
- return kmap_atomic_high_prot(page, kmap_prot);
-}
-
#define flush_cache_kmaps() { flush_icache(); flush_dcache(); }
#endif /* __KERNEL__ */
diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c
index 87023bd1a33c..37e244cdb14e 100644
--- a/arch/mips/mm/highmem.c
+++ b/arch/mips/mm/highmem.c
@@ -18,7 +18,7 @@ void kmap_flush_tlb(unsigned long addr)
}
EXPORT_SYMBOL(kmap_flush_tlb);
-void *kmap_atomic_high(struct page *page)
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
{
unsigned long vaddr;
int idx, type;
@@ -29,12 +29,12 @@ void *kmap_atomic_high(struct page *page)
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte - idx)));
#endif
- set_pte(kmap_pte-idx, mk_pte(page, kmap_prot));
+ set_pte(kmap_pte-idx, mk_pte(page, prot));
local_flush_tlb_one((unsigned long)vaddr);
return (void*) vaddr;
}
-EXPORT_SYMBOL(kmap_atomic_high);
+EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr)
{
diff --git a/arch/nds32/mm/highmem.c b/arch/nds32/mm/highmem.c
index 809f8c830f06..63ded527c1e8 100644
--- a/arch/nds32/mm/highmem.c
+++ b/arch/nds32/mm/highmem.c
@@ -10,7 +10,7 @@
#include <asm/fixmap.h>
#include <asm/tlbflush.h>
-void *kmap_atomic_high(struct page *page)
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
{
unsigned int idx;
unsigned long vaddr, pte;
@@ -21,7 +21,7 @@ void *kmap_atomic_high(struct page *page)
idx = type + KM_TYPE_NR * smp_processor_id();
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
- pte = (page_to_pfn(page) << PAGE_SHIFT) | (kmap_prot);
+ pte = (page_to_pfn(page) << PAGE_SHIFT) | prot;
ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr);
set_pte(ptep, pte);
@@ -32,7 +32,7 @@ void *kmap_atomic_high(struct page *page)
return (void *)vaddr;
}
-EXPORT_SYMBOL(kmap_atomic_high);
+EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr)
{
diff --git a/arch/powerpc/include/asm/highmem.h b/arch/powerpc/include/asm/highmem.h
index ee5de974c5ef..8d8ee3fcd800 100644
--- a/arch/powerpc/include/asm/highmem.h
+++ b/arch/powerpc/include/asm/highmem.h
@@ -59,23 +59,6 @@ extern pte_t *pkmap_page_table;
#define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT)
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
-extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot);
-static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot)
-{
- preempt_disable();
- pagefault_disable();
- if (!PageHighMem(page))
- return page_address(page);
-
- return kmap_atomic_high_prot(page, prot);
-}
-
-static inline void *kmap_atomic_high(struct page *page)
-{
- return kmap_atomic_high_prot(page, kmap_prot);
-}
-
-
#define flush_cache_kmaps() flush_cache_all()
#endif /* __KERNEL__ */
diff --git a/arch/sparc/mm/highmem.c b/arch/sparc/mm/highmem.c
index 9f06d75e88e1..414f578d1e57 100644
--- a/arch/sparc/mm/highmem.c
+++ b/arch/sparc/mm/highmem.c
@@ -54,7 +54,7 @@ void __init kmap_init(void)
kmap_prot = __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE);
}
-void *kmap_atomic_high(struct page *page)
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
{
unsigned long vaddr;
long idx, type;
@@ -73,7 +73,7 @@ void *kmap_atomic_high(struct page *page)
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte-idx)));
#endif
- set_pte(kmap_pte-idx, mk_pte(page, kmap_prot));
+ set_pte(kmap_pte-idx, mk_pte(page, prot));
/* XXX Fix - Anton */
#if 0
__flush_tlb_one(vaddr);
@@ -83,7 +83,7 @@ void *kmap_atomic_high(struct page *page)
return (void*) vaddr;
}
-EXPORT_SYMBOL(kmap_atomic_high);
+EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr)
{
diff --git a/arch/x86/include/asm/highmem.h b/arch/x86/include/asm/highmem.h
index be66b77885a0..0f420b24e0fc 100644
--- a/arch/x86/include/asm/highmem.h
+++ b/arch/x86/include/asm/highmem.h
@@ -58,20 +58,6 @@ extern unsigned long highstart_pfn, highend_pfn;
#define PKMAP_NR(virt) ((virt-PKMAP_BASE) >> PAGE_SHIFT)
#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
-extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot);
-static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot)
-{
- preempt_disable();
- pagefault_disable();
- if (!PageHighMem(page))
- return page_address(page);
-
- return kmap_atomic_high_prot(page, prot);
-}
-static inline void *kmap_atomic_high(struct page *page)
-{
- return kmap_atomic_high_prot(page, kmap_prot);
-}
void *kmap_atomic_pfn(unsigned long pfn);
void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot);
diff --git a/arch/xtensa/mm/highmem.c b/arch/xtensa/mm/highmem.c
index 50168b09510a..99b5ad137ab5 100644
--- a/arch/xtensa/mm/highmem.c
+++ b/arch/xtensa/mm/highmem.c
@@ -37,7 +37,7 @@ static inline enum fixed_addresses kmap_idx(int type, unsigned long color)
color;
}
-void *kmap_atomic_high(struct page *page)
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
{
enum fixed_addresses idx;
unsigned long vaddr;
@@ -48,11 +48,11 @@ void *kmap_atomic_high(struct page *page)
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte + idx)));
#endif
- set_pte(kmap_pte + idx, mk_pte(page, kmap_prot));
+ set_pte(kmap_pte + idx, mk_pte(page, prot));
return (void *)vaddr;
}
-EXPORT_SYMBOL(kmap_atomic_high);
+EXPORT_SYMBOL(kmap_atomic_high_prot);
void kunmap_atomic_high(void *kvaddr)
{
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index c36c0ee09423..89838306f50d 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -32,7 +32,7 @@ static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
#include <asm/kmap_types.h>
#ifdef CONFIG_HIGHMEM
-extern void *kmap_atomic_high(struct page *page);
+extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot);
extern void kunmap_atomic_high(void *kvaddr);
#include <asm/highmem.h>
@@ -76,14 +76,15 @@ static inline void kunmap(struct page *page)
* be used in IRQ contexts, so in some (very limited) cases we need
* it.
*/
-static inline void *kmap_atomic(struct page *page)
+static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot)
{
preempt_disable();
pagefault_disable();
if (!PageHighMem(page))
return page_address(page);
- return kmap_atomic_high(page);
+ return kmap_atomic_high_prot(page, prot);
}
+#define kmap_atomic(page) kmap_atomic_prot(page, kmap_prot)
/* declarations for linux/mm/highmem.c */
unsigned int nr_free_highpages(void);
--
2.25.1
next prev parent reply other threads:[~2020-05-04 1:09 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-04 1:09 [PATCH V2 00/11] Subject: Remove duplicated kmap code ira.weiny
2020-05-04 1:09 ` [PATCH V2 01/11] arch/kmap: Remove BUG_ON() ira.weiny
2020-05-04 1:09 ` [PATCH V2 02/11] arch/xtensa: Move kmap build bug out of the way ira.weiny
2020-05-04 1:09 ` [PATCH V2 03/11] arch/kmap: Remove redundant arch specific kmaps ira.weiny
2020-05-04 1:09 ` [PATCH V2 04/11] arch/kunmap: Remove duplicate kunmap implementations ira.weiny
2020-05-04 1:09 ` [PATCH V2 05/11] {x86,powerpc,microblaze}/kmap: Move preempt disable ira.weiny
2020-05-06 6:11 ` Christoph Hellwig
2020-05-06 20:25 ` Ira Weiny
2020-05-04 1:09 ` [PATCH V2 06/11] arch/kmap_atomic: Consolidate duplicate code ira.weiny
2020-05-06 6:12 ` Christoph Hellwig
2020-05-04 1:09 ` [PATCH V2 07/11] arch/kunmap_atomic: " ira.weiny
2020-05-06 6:12 ` Christoph Hellwig
2020-05-04 1:09 ` [PATCH V2 08/11] arch/kmap: Ensure kmap_prot visibility ira.weiny
2020-05-06 6:13 ` Christoph Hellwig
2020-05-06 20:33 ` Ira Weiny
2020-05-07 4:56 ` Christoph Hellwig
2020-05-04 1:09 ` [PATCH V2 09/11] arch/kmap: Don't hard code kmap_prot values ira.weiny
2020-05-04 1:09 ` ira.weiny [this message]
2020-05-06 6:14 ` [PATCH V2 10/11] arch/kmap: Define kmap_atomic_prot() for all arch's Christoph Hellwig
2020-05-04 1:09 ` [PATCH V2 11/11] drm: Remove drm specific kmap_atomic code ira.weiny
2020-05-04 11:18 ` Daniel Vetter
2020-05-04 20:24 ` Ira Weiny
2020-05-04 1:35 ` [PATCH V2 00/11] Subject: Remove duplicated kmap code Al Viro
2020-05-04 5:04 ` Ira Weiny
2020-05-04 5:33 ` Al Viro
2020-05-04 20:17 ` Ira Weiny
2020-05-04 21:02 ` Al Viro
2020-05-04 23:27 ` Ira Weiny
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