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[Qemu-devel] [PATCH v9 10/20] memory: Access MemoryRegion with MemOp
From: |
Tony Nguyen |
Subject: |
[Qemu-devel] [PATCH v9 10/20] memory: Access MemoryRegion with MemOp |
Date: |
Sat, 24 Aug 2019 04:36:48 +1000 |
Convert memory_region_dispatch_{read|write} operand "unsigned size"
into a "MemOp op".
Signed-off-by: Tony Nguyen <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
---
include/exec/memop.h | 20 ++++++++++++++------
include/exec/memory.h | 9 +++++----
memory.c | 7 +++++--
3 files changed, 24 insertions(+), 12 deletions(-)
diff --git a/include/exec/memop.h b/include/exec/memop.h
index dfd76a1604..0a610b75d9 100644
--- a/include/exec/memop.h
+++ b/include/exec/memop.h
@@ -12,6 +12,8 @@
#ifndef MEMOP_H
#define MEMOP_H
+#include "qemu/host-utils.h"
+
typedef enum MemOp {
MO_8 = 0,
MO_16 = 1,
@@ -107,14 +109,20 @@ typedef enum MemOp {
MO_SSIZE = MO_SIZE | MO_SIGN,
} MemOp;
+/* MemOp to size in bytes. */
+static inline unsigned memop_size(MemOp op)
+{
+ return 1 << (op & MO_SIZE);
+}
+
/* Size in bytes to MemOp. */
-static inline unsigned size_memop(unsigned size)
+static inline MemOp size_memop(unsigned size)
{
- /*
- * FIXME: No-op to aid conversion of memory_region_dispatch_{read|write}
- * "unsigned size" operand into a "MemOp op".
- */
- return size;
+#ifdef CONFIG_DEBUG_TCG
+ /* Power of 2 up to 8. */
+ assert((size & (size - 1)) == 0 && size >= 1 && size <= 8);
+#endif
+ return ctz32(size);
}
#endif
diff --git a/include/exec/memory.h b/include/exec/memory.h
index fddc2ff48a..192875b080 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -19,6 +19,7 @@
#include "exec/cpu-common.h"
#include "exec/hwaddr.h"
#include "exec/memattrs.h"
+#include "exec/memop.h"
#include "exec/ramlist.h"
#include "qemu/bswap.h"
#include "qemu/queue.h"
@@ -1749,13 +1750,13 @@ void mtree_info(bool flatview, bool dispatch_tree, bool
owner);
* @mr: #MemoryRegion to access
* @addr: address within that region
* @pval: pointer to uint64_t which the data is written to
- * @size: size of the access in bytes
+ * @op: size, sign, and endianness of the memory operation
* @attrs: memory transaction attributes to use for the access
*/
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
hwaddr addr,
uint64_t *pval,
- unsigned size,
+ MemOp op,
MemTxAttrs attrs);
/**
* memory_region_dispatch_write: perform a write directly to the specified
@@ -1764,13 +1765,13 @@ MemTxResult memory_region_dispatch_read(MemoryRegion
*mr,
* @mr: #MemoryRegion to access
* @addr: address within that region
* @data: data to write
- * @size: size of the access in bytes
+ * @op: size, sign, and endianness of the memory operation
* @attrs: memory transaction attributes to use for the access
*/
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
hwaddr addr,
uint64_t data,
- unsigned size,
+ MemOp op,
MemTxAttrs attrs);
/**
diff --git a/memory.c b/memory.c
index 4aa38eb5b1..d898ad212e 100644
--- a/memory.c
+++ b/memory.c
@@ -1439,9 +1439,10 @@ static MemTxResult
memory_region_dispatch_read1(MemoryRegion *mr,
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
hwaddr addr,
uint64_t *pval,
- unsigned size,
+ MemOp op,
MemTxAttrs attrs)
{
+ unsigned size = memop_size(op);
MemTxResult r;
if (!memory_region_access_valid(mr, addr, size, false, attrs)) {
@@ -1483,9 +1484,11 @@ static bool
memory_region_dispatch_write_eventfds(MemoryRegion *mr,
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
hwaddr addr,
uint64_t data,
- unsigned size,
+ MemOp op,
MemTxAttrs attrs)
{
+ unsigned size = memop_size(op);
+
if (!memory_region_access_valid(mr, addr, size, true, attrs)) {
unassigned_mem_write(mr, addr, data, size);
return MEMTX_DECODE_ERROR;
--
2.23.0
- Re: [Qemu-devel] [PATCH v9 00/20] Invert Endian bit in SPARCv9 MMU TTE, (continued)
- [Qemu-devel] [PATCH v9 01/20] tcg: TCGMemOp is now accelerator independent MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 02/20] memory: Introduce size_memop, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 03/20] target/mips: Access MemoryRegion with MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 04/20] hw/s390x: Access MemoryRegion with MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 05/20] hw/intc/armv7m_nic: Access MemoryRegion with MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 06/20] hw/virtio: Access MemoryRegion with MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 07/20] hw/vfio: Access MemoryRegion with MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 08/20] exec: Access MemoryRegion with MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 10/20] memory: Access MemoryRegion with MemOp,
Tony Nguyen <=
- [Qemu-devel] [PATCH v9 09/20] cputlb: Access MemoryRegion with MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 12/20] target/mips: Hard code size with MO_{8|16|32|64}, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 11/20] hw/s390x: Hard code size with MO_{8|16|32|64}, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 13/20] exec: Hard code size with MO_{8|16|32|64}, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 17/20] cpu: TLB_FLAGS_MASK bit to force memory slow path, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 15/20] cputlb: Replace size and endian operands for MemOp, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 14/20] memory: Access MemoryRegion with endianness, Tony Nguyen, 2019/08/23
- [Qemu-devel] [PATCH v9 16/20] memory: Single byte swap along the I/O path, Tony Nguyen, 2019/08/23