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[PATCH v2 01/20] target/arm: Add commentary for CPUARMState.exclusive_hi
From: |
Richard Henderson |
Subject: |
[PATCH v2 01/20] target/arm: Add commentary for CPUARMState.exclusive_high |
Date: |
Thu, 25 May 2023 16:25:39 -0700 |
Document the meaning of exclusive_high in a big-endian context,
and why we can't change it now.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index d469a2637b..4e16eab82e 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -677,8 +677,15 @@ typedef struct CPUArchState {
uint64_t zcr_el[4]; /* ZCR_EL[1-3] */
uint64_t smcr_el[4]; /* SMCR_EL[1-3] */
} vfp;
+
uint64_t exclusive_addr;
uint64_t exclusive_val;
+ /*
+ * Contains the 'val' for the second 64-bit register of LDXP, which comes
+ * from the higher address, not the high part of a complete 128-bit value.
+ * This is perhaps confusingly named, but the name is now baked into the
+ * migration format.
+ */
uint64_t exclusive_high;
/* iwMMXt coprocessor state. */
--
2.34.1
- [PATCH v2 08/20] target/arm: Sink gen_mte_check1 into load/store_exclusive, (continued)
- [PATCH v2 08/20] target/arm: Sink gen_mte_check1 into load/store_exclusive, Richard Henderson, 2023/05/25
- [PATCH v2 02/20] target/arm: Add feature test for FEAT_LSE2, Richard Henderson, 2023/05/25
- [PATCH v2 06/20] target/arm: Use tcg_gen_qemu_st_i128 for STZG, STZ2G, Richard Henderson, 2023/05/25
- [PATCH v2 09/20] target/arm: Load/store integer pair with one tcg operation, Richard Henderson, 2023/05/25
- [PATCH v2 10/20] target/arm: Hoist finalize_memop out of do_gpr_{ld, st}, Richard Henderson, 2023/05/25
- [PATCH v2 14/20] target/arm: Check alignment in helper_mte_check, Richard Henderson, 2023/05/25
- [PATCH v2 12/20] target/arm: Pass memop to gen_mte_check1*, Richard Henderson, 2023/05/25
- [PATCH v2 15/20] target/arm: Add SCTLR.nAA to TBFLAG_A64, Richard Henderson, 2023/05/25
- [PATCH v2 19/20] tests/tcg/multiarch: Adjust sigbus.c, Richard Henderson, 2023/05/25
- [PATCH v2 01/20] target/arm: Add commentary for CPUARMState.exclusive_high,
Richard Henderson <=
[PATCH v2 03/20] target/arm: Introduce finalize_memop_{atom,pair}, Richard Henderson, 2023/05/25
[PATCH v2 05/20] target/arm: Use tcg_gen_qemu_{st, ld}_i128 for do_fp_{st, ld}, Richard Henderson, 2023/05/25
[PATCH v2 11/20] target/arm: Hoist finalize_memop out of do_fp_{ld, st}, Richard Henderson, 2023/05/25