* [Qemu-devel] [PATCH] linux-user: Update MIPS specific prctl() implementation
@ 2018-11-14 13:37 Stefan Markovic
2018-11-14 14:09 ` Laurent Vivier
0 siblings, 1 reply; 3+ messages in thread
From: Stefan Markovic @ 2018-11-14 13:37 UTC (permalink / raw)
To: qemu-devel
Cc: aurelien, amarkovic, smarkovic, pjovanovic, riku.voipio, laurent
From: Stefan Markovic <smarkovic@wavecomp.com>
Perform needed checks before actual prctl() PR_SET_FP_MODE and
PR_GET_FP_MODE work based on kernel implementation. Also, update
necessary hflags.
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
---
linux-user/syscall.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 810a58b..10db8b7 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9544,9 +9544,25 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
{
CPUMIPSState *env = ((CPUMIPSState *)cpu_env);
bool old_fr = env->CP0_Status & (1 << CP0St_FR);
+ bool old_fre = env->CP0_Config5 & (1 << CP0C5_FRE);
bool new_fr = arg2 & TARGET_PR_FP_MODE_FR;
bool new_fre = arg2 & TARGET_PR_FP_MODE_FRE;
+ const unsigned int known_bits = TARGET_PR_FP_MODE_FR |
+ TARGET_PR_FP_MODE_FRE;
+
+ /* If nothing to change, return right away, successfully. */
+ if (old_fr == new_fr && old_fre == new_fre) {
+ return 0;
+ }
+ /* Check the value is valid */
+ if (arg2 & ~known_bits) {
+ return -TARGET_EOPNOTSUPP;
+ }
+ /* Setting FRE without FR is not supported. */
+ if (new_fre && !new_fr) {
+ return -TARGET_EOPNOTSUPP;
+ }
if (new_fr && !(env->active_fpu.fcr0 & (1 << FCR0_F64))) {
/* FR1 is not supported */
return -TARGET_EOPNOTSUPP;
@@ -9576,6 +9592,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
env->hflags |= MIPS_HFLAG_F64;
} else {
env->CP0_Status &= ~(1 << CP0St_FR);
+ env->hflags &= ~MIPS_HFLAG_F64;
}
if (new_fre) {
env->CP0_Config5 |= (1 << CP0C5_FRE);
@@ -9584,6 +9601,7 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
}
} else {
env->CP0_Config5 &= ~(1 << CP0C5_FRE);
+ env->hflags &= ~MIPS_HFLAG_FRE;
}
return 0;
--
1.9.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH] linux-user: Update MIPS specific prctl() implementation
2018-11-14 13:37 [Qemu-devel] [PATCH] linux-user: Update MIPS specific prctl() implementation Stefan Markovic
@ 2018-11-14 14:09 ` Laurent Vivier
2018-11-16 11:58 ` Aleksandar Markovic
0 siblings, 1 reply; 3+ messages in thread
From: Laurent Vivier @ 2018-11-14 14:09 UTC (permalink / raw)
To: Stefan Markovic, qemu-devel
Cc: smarkovic, riku.voipio, amarkovic, pjovanovic, aurelien
On 14/11/2018 14:37, Stefan Markovic wrote:
> From: Stefan Markovic <smarkovic@wavecomp.com>
>
> Perform needed checks before actual prctl() PR_SET_FP_MODE and
> PR_GET_FP_MODE work based on kernel implementation. Also, update
> necessary hflags.
>
> Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
I think it's better if you send the patch with the email address of the
S-o-b.
> ---
> linux-user/syscall.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
If you plan to do a MIPS p-r before the next RC, don't hesitate to add
this patch to it (my linux-user queue is empty for the moment).
Thanks,
Laurent
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Qemu-devel] [PATCH] linux-user: Update MIPS specific prctl() implementation
2018-11-14 14:09 ` Laurent Vivier
@ 2018-11-16 11:58 ` Aleksandar Markovic
0 siblings, 0 replies; 3+ messages in thread
From: Aleksandar Markovic @ 2018-11-16 11:58 UTC (permalink / raw)
To: Laurent Vivier, Stefan Markovic, qemu-devel
Cc: Stefan Markovic, riku.voipio, Petar Jovanovic, aurelien
From: Laurent Vivier <laurent@vivier.eu>
> Reviewed-by: Laurent Vivier <laurent@vivier.eu>
>
> If you plan to do a MIPS p-r before the next RC, don't hesitate to add
> this patch to it (my linux-user queue is empty for the moment).
Laurent,
I plan to create a MIPS pull request in next few days, and I am
going to include this patch in it (unless you tell me not to do so).
Thanks a bunch!!
Aleksandar
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2018-11-16 11:58 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2018-11-14 13:37 [Qemu-devel] [PATCH] linux-user: Update MIPS specific prctl() implementation Stefan Markovic
2018-11-14 14:09 ` Laurent Vivier
2018-11-16 11:58 ` Aleksandar Markovic
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