Searched hist:"4 bfa602bc2227f5b5a506a4c0c20657d68eaefd1" (Results 1 – 4 of 4) sorted by relevance
| /openbmc/qemu/target/sh4/ |
| H A D | helper.h | diff 4bfa602bc2227f5b5a506a4c0c20657d68eaefd1 Tue Jul 18 15:02:31 CDT 2017 Richard Henderson <rth@twiddle.net> target/sh4: Handle user-space atomics
For uniprocessors, SH4 uses optimistic restartable atomic sequences.
Upon an interrupt, a real kernel would simply notice magic values in
the registers and reset the PC to the start of the sequence.
For QEMU, we cannot do this in quite the same way. Instead, we notice
the normal start of such a sequence (mov #-x,r15), and start a new TB
that can be executed under cpu_exec_step_atomic.
Reported-by: Bruno Haible <bruno@clisp.org>
LP: https://bugs.launchpad.net/bugs/1701971
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170718200255.31647-7-rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
|
| H A D | op_helper.c | diff 4bfa602bc2227f5b5a506a4c0c20657d68eaefd1 Tue Jul 18 15:02:31 CDT 2017 Richard Henderson <rth@twiddle.net> target/sh4: Handle user-space atomics
For uniprocessors, SH4 uses optimistic restartable atomic sequences.
Upon an interrupt, a real kernel would simply notice magic values in
the registers and reset the PC to the start of the sequence.
For QEMU, we cannot do this in quite the same way. Instead, we notice
the normal start of such a sequence (mov #-x,r15), and start a new TB
that can be executed under cpu_exec_step_atomic.
Reported-by: Bruno Haible <bruno@clisp.org>
LP: https://bugs.launchpad.net/bugs/1701971
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170718200255.31647-7-rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
|
| H A D | cpu.h | diff 4bfa602bc2227f5b5a506a4c0c20657d68eaefd1 Tue Jul 18 15:02:31 CDT 2017 Richard Henderson <rth@twiddle.net> target/sh4: Handle user-space atomics
For uniprocessors, SH4 uses optimistic restartable atomic sequences.
Upon an interrupt, a real kernel would simply notice magic values in
the registers and reset the PC to the start of the sequence.
For QEMU, we cannot do this in quite the same way. Instead, we notice
the normal start of such a sequence (mov #-x,r15), and start a new TB
that can be executed under cpu_exec_step_atomic.
Reported-by: Bruno Haible <bruno@clisp.org>
LP: https://bugs.launchpad.net/bugs/1701971
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170718200255.31647-7-rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
|
| H A D | translate.c | diff 4bfa602bc2227f5b5a506a4c0c20657d68eaefd1 Tue Jul 18 15:02:31 CDT 2017 Richard Henderson <rth@twiddle.net> target/sh4: Handle user-space atomics
For uniprocessors, SH4 uses optimistic restartable atomic sequences.
Upon an interrupt, a real kernel would simply notice magic values in
the registers and reset the PC to the start of the sequence.
For QEMU, we cannot do this in quite the same way. Instead, we notice
the normal start of such a sequence (mov #-x,r15), and start a new TB
that can be executed under cpu_exec_step_atomic.
Reported-by: Bruno Haible <bruno@clisp.org>
LP: https://bugs.launchpad.net/bugs/1701971
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170718200255.31647-7-rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
|