* [PATCH] powerpc/vdso: fix clock_gettime_fallback for vdso32
@ 2021-01-11 15:18 ` Andreas Schwab
0 siblings, 0 replies; 4+ messages in thread
From: Andreas Schwab @ 2021-01-11 15:18 UTC (permalink / raw)
To: linuxppc-dev
Cc: Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras,
Christophe Leroy, linux-kernel
The second argument of __kernel_clock_gettime64 points to a struct
__kernel_timespec, with 64-bit time_t, so use the clock_gettime64 syscall
in the fallback function for the 32-bit vdso. Similarily,
clock_getres_fallback should use the clock_getres_time64 syscall, though
it isn't yet called from the 32-bit vdso.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
---
arch/powerpc/include/asm/vdso/gettimeofday.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h
index 81671aa365b3..a26c12df2c9a 100644
--- a/arch/powerpc/include/asm/vdso/gettimeofday.h
+++ b/arch/powerpc/include/asm/vdso/gettimeofday.h
@@ -106,13 +106,21 @@ int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz
static __always_inline
int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
{
+#ifndef __powerpc64__
+ return do_syscall_2(__NR_clock_gettime64, _clkid, (unsigned long)_ts);
+#else
return do_syscall_2(__NR_clock_gettime, _clkid, (unsigned long)_ts);
+#endif
}
static __always_inline
int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
{
+#ifndef __powerpc64__
+ return do_syscall_2(__NR_clock_getres_time64, _clkid, (unsigned long)_ts);
+#else
return do_syscall_2(__NR_clock_getres, _clkid, (unsigned long)_ts);
+#endif
}
#ifdef CONFIG_VDSO32
--
2.30.0
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] powerpc/vdso: fix clock_gettime_fallback for vdso32
@ 2021-01-11 15:18 ` Andreas Schwab
0 siblings, 0 replies; 4+ messages in thread
From: Andreas Schwab @ 2021-01-11 15:18 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Paul Mackerras, linux-kernel
The second argument of __kernel_clock_gettime64 points to a struct
__kernel_timespec, with 64-bit time_t, so use the clock_gettime64 syscall
in the fallback function for the 32-bit vdso. Similarily,
clock_getres_fallback should use the clock_getres_time64 syscall, though
it isn't yet called from the 32-bit vdso.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
---
arch/powerpc/include/asm/vdso/gettimeofday.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h
index 81671aa365b3..a26c12df2c9a 100644
--- a/arch/powerpc/include/asm/vdso/gettimeofday.h
+++ b/arch/powerpc/include/asm/vdso/gettimeofday.h
@@ -106,13 +106,21 @@ int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz
static __always_inline
int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
{
+#ifndef __powerpc64__
+ return do_syscall_2(__NR_clock_gettime64, _clkid, (unsigned long)_ts);
+#else
return do_syscall_2(__NR_clock_gettime, _clkid, (unsigned long)_ts);
+#endif
}
static __always_inline
int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
{
+#ifndef __powerpc64__
+ return do_syscall_2(__NR_clock_getres_time64, _clkid, (unsigned long)_ts);
+#else
return do_syscall_2(__NR_clock_getres, _clkid, (unsigned long)_ts);
+#endif
}
#ifdef CONFIG_VDSO32
--
2.30.0
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] powerpc/vdso: fix clock_gettime_fallback for vdso32
2021-01-11 15:18 ` Andreas Schwab
@ 2021-01-11 16:43 ` Christophe Leroy
-1 siblings, 0 replies; 4+ messages in thread
From: Christophe Leroy @ 2021-01-11 16:43 UTC (permalink / raw)
To: Andreas Schwab, linuxppc-dev
Cc: Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras, linux-kernel
Le 11/01/2021 à 16:18, Andreas Schwab a écrit :
> The second argument of __kernel_clock_gettime64 points to a struct
> __kernel_timespec, with 64-bit time_t, so use the clock_gettime64 syscall
> in the fallback function for the 32-bit vdso. Similarily,
> clock_getres_fallback should use the clock_getres_time64 syscall, though
> it isn't yet called from the 32-bit vdso.
>
> Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Fixes: d0e3fc69d00d ("powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32")
> ---
> arch/powerpc/include/asm/vdso/gettimeofday.h | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h
> index 81671aa365b3..a26c12df2c9a 100644
> --- a/arch/powerpc/include/asm/vdso/gettimeofday.h
> +++ b/arch/powerpc/include/asm/vdso/gettimeofday.h
> @@ -106,13 +106,21 @@ int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz
> static __always_inline
> int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
> {
> +#ifndef __powerpc64__
I think we should do like x86, create a second version of clock_gettime_fallback() inside the #ifdef
CONFIG_VDSO32, and move that one in a matching (non existing yet) #else
> + return do_syscall_2(__NR_clock_gettime64, _clkid, (unsigned long)_ts);
> +#else
> return do_syscall_2(__NR_clock_gettime, _clkid, (unsigned long)_ts);
> +#endif
> }
>
> static __always_inline
> int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
> {
> +#ifndef __powerpc64__
Same.
> + return do_syscall_2(__NR_clock_getres_time64, _clkid, (unsigned long)_ts);
> +#else
> return do_syscall_2(__NR_clock_getres, _clkid, (unsigned long)_ts);
> +#endif
> }
>
> #ifdef CONFIG_VDSO32
>
Christophe
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] powerpc/vdso: fix clock_gettime_fallback for vdso32
@ 2021-01-11 16:43 ` Christophe Leroy
0 siblings, 0 replies; 4+ messages in thread
From: Christophe Leroy @ 2021-01-11 16:43 UTC (permalink / raw)
To: Andreas Schwab, linuxppc-dev; +Cc: Paul Mackerras, linux-kernel
Le 11/01/2021 à 16:18, Andreas Schwab a écrit :
> The second argument of __kernel_clock_gettime64 points to a struct
> __kernel_timespec, with 64-bit time_t, so use the clock_gettime64 syscall
> in the fallback function for the 32-bit vdso. Similarily,
> clock_getres_fallback should use the clock_getres_time64 syscall, though
> it isn't yet called from the 32-bit vdso.
>
> Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
Fixes: d0e3fc69d00d ("powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32")
> ---
> arch/powerpc/include/asm/vdso/gettimeofday.h | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h
> index 81671aa365b3..a26c12df2c9a 100644
> --- a/arch/powerpc/include/asm/vdso/gettimeofday.h
> +++ b/arch/powerpc/include/asm/vdso/gettimeofday.h
> @@ -106,13 +106,21 @@ int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz
> static __always_inline
> int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
> {
> +#ifndef __powerpc64__
I think we should do like x86, create a second version of clock_gettime_fallback() inside the #ifdef
CONFIG_VDSO32, and move that one in a matching (non existing yet) #else
> + return do_syscall_2(__NR_clock_gettime64, _clkid, (unsigned long)_ts);
> +#else
> return do_syscall_2(__NR_clock_gettime, _clkid, (unsigned long)_ts);
> +#endif
> }
>
> static __always_inline
> int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
> {
> +#ifndef __powerpc64__
Same.
> + return do_syscall_2(__NR_clock_getres_time64, _clkid, (unsigned long)_ts);
> +#else
> return do_syscall_2(__NR_clock_getres, _clkid, (unsigned long)_ts);
> +#endif
> }
>
> #ifdef CONFIG_VDSO32
>
Christophe
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-01-11 15:18 [PATCH] powerpc/vdso: fix clock_gettime_fallback for vdso32 Andreas Schwab
2021-01-11 15:18 ` Andreas Schwab
2021-01-11 16:43 ` Christophe Leroy
2021-01-11 16:43 ` Christophe Leroy
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