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| author | Richard Henderson | 2017-08-15 16:57:13 +0200 |
|---|---|---|
| committer | Peter Maydell | 2017-08-15 18:38:44 +0200 |
| commit | 19514cde3b92938df750acaecf2caaa85e1d36a6 (patch) | |
| tree | ca26a263a22297b65fdc066d756348394e0283e2 /hw/misc/mmio_interface.c | |
| parent | target/arm: Correct exclusive store cmpxchg memop mask (diff) | |
| download | qemu-19514cde3b92938df750acaecf2caaa85e1d36a6.tar.gz qemu-19514cde3b92938df750acaecf2caaa85e1d36a6.tar.xz qemu-19514cde3b92938df750acaecf2caaa85e1d36a6.zip | |
target/arm: Correct load exclusive pair atomicity
We are not providing the required single-copy atomic semantics for
the 64-bit operation that is the 32-bit paired load.
At the same time, leave the entire 64-bit value in cpu_exclusive_val
and stop writing to cpu_exclusive_high. This means that we do not
have to re-assemble the 64-bit quantity when it comes time to store.
At the same time, drop a redundant temporary and perform all loads
directly into the cpu_exclusive_* globals.
Tested-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20170815145714.17635-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/misc/mmio_interface.c')
0 files changed, 0 insertions, 0 deletions