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[Qemu-devel] [PULL 08/20] cpu_defs: Simplify CPUTLB padding logic
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PULL 08/20] cpu_defs: Simplify CPUTLB padding logic |
Date: |
Wed, 12 Aug 2015 15:37:01 +0200 |
From: Peter Crosthwaite <address@hidden>
There was a complicated subtractive arithmetic for determining the
padding on the CPUTLBEntry structure. Simplify this with a union.
Signed-off-by: Peter Crosthwaite <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
include/exec/cpu-defs.h | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h
index 98b9cff..5093be2 100644
--- a/include/exec/cpu-defs.h
+++ b/include/exec/cpu-defs.h
@@ -105,17 +105,18 @@ typedef struct CPUTLBEntry {
bit 3 : indicates that the entry is invalid
bit 2..0 : zero
*/
- target_ulong addr_read;
- target_ulong addr_write;
- target_ulong addr_code;
- /* Addend to virtual address to get host address. IO accesses
- use the corresponding iotlb value. */
- uintptr_t addend;
- /* padding to get a power of two size */
- uint8_t dummy[(1 << CPU_TLB_ENTRY_BITS) -
- (sizeof(target_ulong) * 3 +
- ((-sizeof(target_ulong) * 3) & (sizeof(uintptr_t) - 1)) +
- sizeof(uintptr_t))];
+ union {
+ struct {
+ target_ulong addr_read;
+ target_ulong addr_write;
+ target_ulong addr_code;
+ /* Addend to virtual address to get host address. IO accesses
+ use the corresponding iotlb value. */
+ uintptr_t addend;
+ };
+ /* padding to get a power of two size */
+ uint8_t dummy[1 << CPU_TLB_ENTRY_BITS];
+ };
} CPUTLBEntry;
QEMU_BUILD_BUG_ON(sizeof(CPUTLBEntry) != (1 << CPU_TLB_ENTRY_BITS));
--
2.4.3
- [Qemu-devel] [PULL 00/20] SCSI, build, TCG, RCU, misc patches for 2015-08-12, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 03/20] tests: virtio-scsi: clear unit attention after reset, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 02/20] scsi-disk: fix cmd.mode field typo, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 01/20] virtio-scsi: use virtqueue_map_sg() when loading requests, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 04/20] scsi-disk: Fix assertion failure on WRITE SAME, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 05/20] virtio-scsi-test: Add test case for tail unaligned WRITE SAME, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 06/20] vhost/scsi: call vhost_dev_cleanup() at unrealize() time, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 08/20] cpu_defs: Simplify CPUTLB padding logic,
Paolo Bonzini <=
- [Qemu-devel] [PULL 09/20] configure: Default to enable module build, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 07/20] cpu-exec: Do not invalidate original TB in cpu_exec_nocache(), Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 10/20] exec: drop cpu_can_do_io, just read cpu->can_do_io, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 11/20] rcu: Allow calling rcu_(un)register_thread() during synchronize_rcu(), Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 12/20] exec: use macro ROUND_UP for alignment, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 14/20] qemu-nbd: remove unnecessary qemu_notify_event(), Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 15/20] configure: only add CONFIG_RDMA to config-host.h once, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 13/20] vhost-scsi: Clarify vhost_virtqueue_mask argument, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 16/20] scsi: create restart bottom half in the right AioContext, Paolo Bonzini, 2015/08/12
- [Qemu-devel] [PULL 18/20] scsi-generic: identify AIO callbacks more clearly, Paolo Bonzini, 2015/08/12