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| author | Peter Maydell <peter.maydell@linaro.org> | 2016-10-27 14:06:34 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-10-27 14:06:34 +0100 |
| commit | 5929d7e8a0e1f43333bc3528b50397ae8dd0fd6b (patch) | |
| tree | 734e144fc58cd15abf7ad008a48f48a8d6ccf25c /cpu-exec.c | |
| parent | 8f9d84df97a3d73544ed2098dd1872fb43e0052d (diff) | |
| parent | ed2839166c21e001d15868f4d9591a21aaebd547 (diff) | |
| download | qemu-5929d7e8a0e1f43333bc3528b50397ae8dd0fd6b.tar.gz | |
Merge remote-tracking branch 'remotes/rth/tags/pull-atomic-20161026' into staging
cmpxchg emulation of atomics, v8
# gpg: Signature made Wed 26 Oct 2016 16:30:03 BST
# gpg: using RSA key 0xAD1270CC4DD0279B
# gpg: Good signature from "Richard Henderson <rth7680@gmail.com>"
# gpg: aka "Richard Henderson <rth@redhat.com>"
# gpg: aka "Richard Henderson <rth@twiddle.net>"
# Primary key fingerprint: 9CB1 8DDA F8E8 49AD 2AFC 16A4 AD12 70CC 4DD0 279B
* remotes/rth/tags/pull-atomic-20161026: (37 commits)
target-alpha: Emulate LL/SC using cmpxchg helpers
target-alpha: Introduce MMU_PHYS_IDX
target-arm: remove EXCP_STREX + cpu_exclusive_{test, info}
linux-user: remove handling of aarch64's EXCP_STREX
linux-user: remove handling of ARM's EXCP_STREX
target-arm: emulate aarch64's LL/SC using cmpxchg helpers
target-arm: emulate SWP with atomic_xchg helper
target-arm: emulate LL/SC using cmpxchg helpers
target-arm: Rearrange aa32 load and store functions
tests: add atomic_add-bench
target-i386: remove helper_lock()
target-i386: emulate XCHG using atomic helper
target-i386: emulate LOCK'ed BTX ops using atomic helpers
target-i386: emulate LOCK'ed XADD using atomic helper
target-i386: emulate LOCK'ed NEG using cmpxchg helper
target-i386: emulate LOCK'ed NOT using atomic helper
target-i386: emulate LOCK'ed INC using atomic helper
target-i386: emulate LOCK'ed OP instructions using atomic helpers
target-i386: emulate LOCK'ed cmpxchg using cmpxchg helpers
tcg: Emit barriers with parallel_cpus
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'cpu-exec.c')
| -rw-r--r-- | cpu-exec.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/cpu-exec.c b/cpu-exec.c index e1bc368c7f..9400732137 100644 --- a/cpu-exec.c +++ b/cpu-exec.c @@ -216,6 +216,36 @@ static void cpu_exec_nocache(CPUState *cpu, int max_cycles, } #endif +static void cpu_exec_step(CPUState *cpu) +{ + CPUArchState *env = (CPUArchState *)cpu->env_ptr; + TranslationBlock *tb; + target_ulong cs_base, pc; + uint32_t flags; + + cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags); + tb = tb_gen_code(cpu, pc, cs_base, flags, + 1 | CF_NOCACHE | CF_IGNORE_ICOUNT); + tb->orig_tb = NULL; + /* execute the generated code */ + trace_exec_tb_nocache(tb, pc); + cpu_tb_exec(cpu, tb); + tb_phys_invalidate(tb, -1); + tb_free(tb); +} + +void cpu_exec_step_atomic(CPUState *cpu) +{ + start_exclusive(); + + /* Since we got here, we know that parallel_cpus must be true. */ + parallel_cpus = false; + cpu_exec_step(cpu); + parallel_cpus = true; + + end_exclusive(); +} + struct tb_desc { target_ulong pc; target_ulong cs_base; |