motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 15:53:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

accel/tcg: Move CPUNegativeOffsetState into CPUState

Browse source 
Retain the separate structure to emphasize its importance.
Enforce CPUArchState always follows CPUState without padding.

Reviewed-by: Anton Johansson <anjo@rev.ng>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-09-12 17:47:56 -07:00
parent 5d30bdcb1b
commit 3b3d7df545
25 changed files with 38 additions and 46 deletions
Download patch file Download diff file Expand all files Collapse all files

17
include/hw/core/cpu.h
View file

@ -345,8 +345,8 @@ typedef union IcountDecr {
} IcountDecr;
/*
* This structure must be placed in ArchCPU immediately
* before CPUArchState, as a field named "neg".
* Elements of CPUState most efficiently accessed from CPUArchState,
* via small negative offsets.
*/
typedef struct CPUNegativeOffsetState {
CPUTLB tlb;
@ -453,6 +453,9 @@ struct qemu_work_item;
* dirty ring structure.
*
* State of one CPU core or thread.
*
* Align, in order to match possible alignment required by CPUArchState,
* and eliminate a hole between CPUState and CPUArchState within ArchCPU.
*/
struct CPUState {
/*< private >*/
@ -571,8 +574,18 @@ struct CPUState {
/* track IOMMUs whose translations we've cached in the TCG TLB */
GArray *iommu_notifiers;
/*
* MUST BE LAST in order to minimize the displacement to CPUArchState.
*/
char neg_align[-sizeof(CPUNegativeOffsetState) % 16] QEMU_ALIGNED(16);
CPUNegativeOffsetState neg;
};
/* Validate placement of CPUNegativeOffsetState. */
QEMU_BUILD_BUG_ON(offsetof(CPUState, neg) !=
sizeof(CPUState) - sizeof(CPUNegativeOffsetState));
typedef QTAILQ_HEAD(CPUTailQ, CPUState) CPUTailQ;
extern CPUTailQ cpus;