* [PATCH 1/5] arm: remove the unused BIOVEC_MERGEABLE define
2018-09-25 20:30 clean up physical merging helpers Christoph Hellwig
@ 2018-09-25 20:30 ` Christoph Hellwig
2018-09-25 20:30 ` [PATCH 2/5] xen: remove the xen_biovec_phys_mergeable export Christoph Hellwig
` (4 subsequent siblings)
5 siblings, 0 replies; 15+ messages in thread
From: Christoph Hellwig @ 2018-09-25 20:30 UTC (permalink / raw)
To: Jens Axboe
Cc: Konrad Rzeszutek Wilk, xen-devel, linux-block, Boris Ostrovsky,
Ming Lei, linux-arm-kernel
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/arm/include/asm/io.h | 7 -------
1 file changed, 7 deletions(-)
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 3c835d6263fa..e58ca25eddb7 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -459,13 +459,6 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
#include <asm-generic/io.h>
-/*
- * can the hardware map this into one segment or not, given no other
- * constraints.
- */
-#define BIOVEC_MERGEABLE(vec1, vec2) \
- ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2)))
-
struct bio_vec;
extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2);
--
2.19.0
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^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH 2/5] xen: remove the xen_biovec_phys_mergeable export
2018-09-25 20:30 clean up physical merging helpers Christoph Hellwig
2018-09-25 20:30 ` [PATCH 1/5] arm: remove the unused BIOVEC_MERGEABLE define Christoph Hellwig
@ 2018-09-25 20:30 ` Christoph Hellwig
2018-09-25 20:30 ` [PATCH 3/5] xen: provide a prototype for xen_biovec_phys_mergeable in xen.h Christoph Hellwig
` (3 subsequent siblings)
5 siblings, 0 replies; 15+ messages in thread
From: Christoph Hellwig @ 2018-09-25 20:30 UTC (permalink / raw)
To: Jens Axboe
Cc: Konrad Rzeszutek Wilk, xen-devel, linux-block, Boris Ostrovsky,
Ming Lei, linux-arm-kernel
BIOVEC_PHYS_MERGEABLE is only called from core block code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/xen/biomerge.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/xen/biomerge.c b/drivers/xen/biomerge.c
index 55ed80c3a17c..399c4e30f723 100644
--- a/drivers/xen/biomerge.c
+++ b/drivers/xen/biomerge.c
@@ -20,4 +20,3 @@ bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
return false;
#endif
}
-EXPORT_SYMBOL(xen_biovec_phys_mergeable);
--
2.19.0
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^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH 3/5] xen: provide a prototype for xen_biovec_phys_mergeable in xen.h
2018-09-25 20:30 clean up physical merging helpers Christoph Hellwig
2018-09-25 20:30 ` [PATCH 1/5] arm: remove the unused BIOVEC_MERGEABLE define Christoph Hellwig
2018-09-25 20:30 ` [PATCH 2/5] xen: remove the xen_biovec_phys_mergeable export Christoph Hellwig
@ 2018-09-25 20:30 ` Christoph Hellwig
2018-09-25 20:30 ` [PATCH 4/5] block: remove ARCH_BIOVEC_PHYS_MERGEABLE Christoph Hellwig
` (2 subsequent siblings)
5 siblings, 0 replies; 15+ messages in thread
From: Christoph Hellwig @ 2018-09-25 20:30 UTC (permalink / raw)
To: Jens Axboe
Cc: Konrad Rzeszutek Wilk, xen-devel, linux-block, Boris Ostrovsky,
Ming Lei, linux-arm-kernel
Having multiple externs in arch headers is not a good way to provide
a common interface.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/arm/include/asm/io.h | 3 ---
arch/arm64/include/asm/io.h | 3 ---
arch/x86/include/asm/io.h | 4 ----
include/xen/xen.h | 4 ++++
4 files changed, 4 insertions(+), 10 deletions(-)
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index e58ca25eddb7..cf5cd88e7289 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -459,9 +459,6 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
#include <asm-generic/io.h>
-struct bio_vec;
-extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
- const struct bio_vec *vec2);
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 774e03ea1bb0..06119ee511cd 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -205,9 +205,6 @@ extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
extern int devmem_is_allowed(unsigned long pfn);
-struct bio_vec;
-extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
- const struct bio_vec *vec2);
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 7c6106216d9c..abdb501a551d 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -371,10 +371,6 @@ extern bool is_early_ioremap_ptep(pte_t *ptep);
#ifdef CONFIG_XEN
#include <xen/xen.h>
-struct bio_vec;
-
-extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
- const struct bio_vec *vec2);
#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
(!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
diff --git a/include/xen/xen.h b/include/xen/xen.h
index 1e1d9bd0bd37..d7a2678da77f 100644
--- a/include/xen/xen.h
+++ b/include/xen/xen.h
@@ -39,4 +39,8 @@ extern uint32_t xen_start_flags;
#define xen_initial_domain() (0)
#endif /* CONFIG_XEN_DOM0 */
+struct bio_vec;
+bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
+ const struct bio_vec *vec2);
+
#endif /* _XEN_XEN_H */
--
2.19.0
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^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH 4/5] block: remove ARCH_BIOVEC_PHYS_MERGEABLE
2018-09-25 20:30 clean up physical merging helpers Christoph Hellwig
` (2 preceding siblings ...)
2018-09-25 20:30 ` [PATCH 3/5] xen: provide a prototype for xen_biovec_phys_mergeable in xen.h Christoph Hellwig
@ 2018-09-25 20:30 ` Christoph Hellwig
2018-09-25 20:30 ` [PATCH 5/5] xen: don't include <xen/xen.h> from <asm/io.h> and <asm/dma-mapping.h> Christoph Hellwig
2018-09-26 14:45 ` clean up physical merging helpers Jens Axboe
5 siblings, 0 replies; 15+ messages in thread
From: Christoph Hellwig @ 2018-09-25 20:30 UTC (permalink / raw)
To: Jens Axboe
Cc: Konrad Rzeszutek Wilk, xen-devel, linux-block, Boris Ostrovsky,
Ming Lei, linux-arm-kernel
Take the Xen check into the core code instead of delegating it to
the architectures.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/arm/include/asm/io.h | 3 ---
arch/arm64/include/asm/io.h | 3 ---
arch/x86/include/asm/io.h | 3 ---
block/blk.h | 7 ++-----
drivers/xen/biomerge.c | 2 +-
5 files changed, 3 insertions(+), 15 deletions(-)
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index cf5cd88e7289..6ae7674da0d6 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -459,9 +459,6 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr);
#include <asm-generic/io.h>
-#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
- (!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
-
#ifdef CONFIG_MMU
#define ARCH_HAS_VALID_PHYS_ADDR_RANGE
extern int valid_phys_addr_range(phys_addr_t addr, size_t size);
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 06119ee511cd..18f6ae6a43f1 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -205,8 +205,5 @@ extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);
extern int devmem_is_allowed(unsigned long pfn);
-#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
- (!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
-
#endif /* __KERNEL__ */
#endif /* __ASM_IO_H */
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index abdb501a551d..232d8e9ee8a0 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -371,9 +371,6 @@ extern bool is_early_ioremap_ptep(pte_t *ptep);
#ifdef CONFIG_XEN
#include <xen/xen.h>
-
-#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) \
- (!xen_domain() || xen_biovec_phys_mergeable(vec1, vec2))
#endif /* CONFIG_XEN */
#define IO_SPACE_LIMIT 0xffff
diff --git a/block/blk.h b/block/blk.h
index 50f74ce60453..58c030f727e9 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -4,6 +4,7 @@
#include <linux/idr.h>
#include <linux/blk-mq.h>
+#include <xen/xen.h>
#include "blk-mq.h"
/* Amount of time in which a process may batch requests */
@@ -149,10 +150,6 @@ static inline void blk_queue_enter_live(struct request_queue *q)
percpu_ref_get(&q->q_usage_counter);
}
-#ifndef ARCH_BIOVEC_PHYS_MERGEABLE
-#define ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2) true
-#endif
-
static inline bool biovec_phys_mergeable(struct request_queue *q,
struct bio_vec *vec1, struct bio_vec *vec2)
{
@@ -162,7 +159,7 @@ static inline bool biovec_phys_mergeable(struct request_queue *q,
if (addr1 + vec1->bv_len != addr2)
return false;
- if (!ARCH_BIOVEC_PHYS_MERGEABLE(vec1, vec2))
+ if (xen_domain() && !xen_biovec_phys_mergeable(vec1, vec2))
return false;
if ((addr1 | mask) != ((addr2 + vec2->bv_len - 1) | mask))
return false;
diff --git a/drivers/xen/biomerge.c b/drivers/xen/biomerge.c
index 399c4e30f723..f3fbb700f569 100644
--- a/drivers/xen/biomerge.c
+++ b/drivers/xen/biomerge.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/bio.h>
-#include <linux/io.h>
#include <linux/export.h>
+#include <xen/xen.h>
#include <xen/page.h>
bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
--
2.19.0
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https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH 5/5] xen: don't include <xen/xen.h> from <asm/io.h> and <asm/dma-mapping.h>
2018-09-25 20:30 clean up physical merging helpers Christoph Hellwig
` (3 preceding siblings ...)
2018-09-25 20:30 ` [PATCH 4/5] block: remove ARCH_BIOVEC_PHYS_MERGEABLE Christoph Hellwig
@ 2018-09-25 20:30 ` Christoph Hellwig
2018-09-26 14:45 ` clean up physical merging helpers Jens Axboe
5 siblings, 0 replies; 15+ messages in thread
From: Christoph Hellwig @ 2018-09-25 20:30 UTC (permalink / raw)
To: Jens Axboe
Cc: Konrad Rzeszutek Wilk, xen-devel, linux-block, Boris Ostrovsky,
Ming Lei, linux-arm-kernel
Nothing Xen specific in these headers, which get included from a lot
of code in the kernel. So prune the includes and move them to the
Xen-specific files that actually use them instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/arm/include/asm/io.h | 1 -
arch/arm64/include/asm/io.h | 2 --
arch/x86/include/asm/io.h | 4 ----
arch/x86/include/asm/xen/events.h | 2 ++
arch/x86/xen/enlighten.c | 1 +
arch/x86/xen/enlighten_pvh.c | 1 +
arch/x86/xen/platform-pci-unplug.c | 1 +
arch/x86/xen/pmu.c | 1 +
drivers/xen/xen-acpi-pad.c | 1 +
9 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 6ae7674da0d6..6b51826ab3d1 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -28,7 +28,6 @@
#include <asm/byteorder.h>
#include <asm/memory.h>
#include <asm-generic/pci_iomap.h>
-#include <xen/xen.h>
/*
* ISA I/O bus memory addresses are 1:1 with the physical address.
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 18f6ae6a43f1..9f8b915af3a7 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -31,8 +31,6 @@
#include <asm/alternative.h>
#include <asm/cpufeature.h>
-#include <xen/xen.h>
-
/*
* Generic IO read/write. These perform native-endian accesses.
*/
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 232d8e9ee8a0..9a92a3ac2ac5 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -369,10 +369,6 @@ extern void __iomem *ioremap_wt(resource_size_t offset, unsigned long size);
extern bool is_early_ioremap_ptep(pte_t *ptep);
-#ifdef CONFIG_XEN
-#include <xen/xen.h>
-#endif /* CONFIG_XEN */
-
#define IO_SPACE_LIMIT 0xffff
#include <asm-generic/io.h>
diff --git a/arch/x86/include/asm/xen/events.h b/arch/x86/include/asm/xen/events.h
index d383140e1dc8..068d9b067c83 100644
--- a/arch/x86/include/asm/xen/events.h
+++ b/arch/x86/include/asm/xen/events.h
@@ -2,6 +2,8 @@
#ifndef _ASM_X86_XEN_EVENTS_H
#define _ASM_X86_XEN_EVENTS_H
+#include <xen/xen.h>
+
enum ipi_vector {
XEN_RESCHEDULE_VECTOR,
XEN_CALL_FUNCTION_VECTOR,
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 2eeddd814653..0ca46e03b830 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -5,6 +5,7 @@
#include <linux/kexec.h>
#include <linux/slab.h>
+#include <xen/xen.h>
#include <xen/features.h>
#include <xen/page.h>
#include <xen/interface/memory.h>
diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c
index c85d1a88f476..2a9025343534 100644
--- a/arch/x86/xen/enlighten_pvh.c
+++ b/arch/x86/xen/enlighten_pvh.c
@@ -11,6 +11,7 @@
#include <asm/xen/interface.h>
#include <asm/xen/hypercall.h>
+#include <xen/xen.h>
#include <xen/interface/memory.h>
#include <xen/interface/hvm/start_info.h>
diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c
index 33a783c77d96..b99585034dd2 100644
--- a/arch/x86/xen/platform-pci-unplug.c
+++ b/arch/x86/xen/platform-pci-unplug.c
@@ -23,6 +23,7 @@
#include <linux/io.h>
#include <linux/export.h>
+#include <xen/xen.h>
#include <xen/platform_pci.h>
#include "xen-ops.h"
diff --git a/arch/x86/xen/pmu.c b/arch/x86/xen/pmu.c
index 7d00d4ad44d4..5f7d530fc679 100644
--- a/arch/x86/xen/pmu.c
+++ b/arch/x86/xen/pmu.c
@@ -3,6 +3,7 @@
#include <linux/interrupt.h>
#include <asm/xen/hypercall.h>
+#include <xen/xen.h>
#include <xen/page.h>
#include <xen/interface/xen.h>
#include <xen/interface/vcpu.h>
diff --git a/drivers/xen/xen-acpi-pad.c b/drivers/xen/xen-acpi-pad.c
index 23d1808fe027..e25ab76b9c99 100644
--- a/drivers/xen/xen-acpi-pad.c
+++ b/drivers/xen/xen-acpi-pad.c
@@ -19,6 +19,7 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/acpi.h>
+#include <xen/xen.h>
#include <xen/interface/version.h>
#include <xen/xen-ops.h>
#include <asm/xen/hypercall.h>
--
2.19.0
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^ permalink raw reply related [flat|nested] 15+ messages in thread* Re: clean up physical merging helpers
2018-09-25 20:30 clean up physical merging helpers Christoph Hellwig
` (4 preceding siblings ...)
2018-09-25 20:30 ` [PATCH 5/5] xen: don't include <xen/xen.h> from <asm/io.h> and <asm/dma-mapping.h> Christoph Hellwig
@ 2018-09-26 14:45 ` Jens Axboe
5 siblings, 0 replies; 15+ messages in thread
From: Jens Axboe @ 2018-09-26 14:45 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Konrad Rzeszutek Wilk, xen-devel, linux-block, Boris Ostrovsky,
Ming Lei, linux-arm-kernel
On 9/25/18 2:30 PM, Christoph Hellwig wrote:
> Hi Jens,
>
> this series moves Xen special handling of block merges from arch hooks
> into common code. A previous version has been reviewed by Boris.
Applied, thanks.
--
Jens Axboe
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^ permalink raw reply [flat|nested] 15+ messages in thread