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lib/vdso: Add vdso_data pointer as input to __arch_get_timens_vdso_data()

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For the same reason as commit e876f0b69d ("lib/vdso: Allow
architectures to provide the vdso data pointer"), powerpc wants to
avoid calculation of relative position to code.

As the timens_vdso_data is next page to vdso_data, provide
vdso_data pointer to __arch_get_timens_vdso_data() in order
to ease the calculation on powerpc in following patches.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/539c4204b1baa77c55f758904a1ea239abbc7a5c.1617209142.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2021-03-31 16:48:45 +00:00 committed by Michael Ellerman
parent 58efe9f696
commit 808094fcbf
5 changed files with 16 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm64/include/asm/vdso/compat_gettimeofday.h
View File

@ -155,7 +155,8 @@ static __always_inline const struct vdso_data *__arch_get_vdso_data(void)
}
#ifdef CONFIG_TIME_NS
static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
static __always_inline
const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)
{
const struct vdso_data *ret;

2
arch/arm64/include/asm/vdso/gettimeofday.h
View File

@ -100,7 +100,7 @@ const struct vdso_data *__arch_get_vdso_data(void)
#ifdef CONFIG_TIME_NS
static __always_inline
const struct vdso_data *__arch_get_timens_vdso_data(void)
const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)
{
return _timens_data;
}

3
arch/s390/include/asm/vdso/gettimeofday.h
View File

@ -68,7 +68,8 @@ long clock_getres_fallback(clockid_t clkid, struct __kernel_timespec *ts)
}
#ifdef CONFIG_TIME_NS
static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
static __always_inline
const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)
{
return _timens_data;
}

3
arch/x86/include/asm/vdso/gettimeofday.h
View File

@ -58,7 +58,8 @@ extern struct ms_hyperv_tsc_page hvclock_page
#endif
#ifdef CONFIG_TIME_NS
static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
static __always_inline
const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)
{
return __timens_vdso_data;
}

15
lib/vdso/gettimeofday.c
View File

@ -49,13 +49,15 @@ static inline bool vdso_cycles_ok(u64 cycles)
static __always_inline int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
{
const struct vdso_data *vd = __arch_get_timens_vdso_data();
const struct vdso_data *vd;
const struct timens_offset *offs = &vdns->offset[clk];
const struct vdso_timestamp *vdso_ts;
u64 cycles, last, ns;
u32 seq;
s64 sec;
vd = vdns - (clk == CLOCK_MONOTONIC_RAW ? CS_RAW : CS_HRES_COARSE);
vd = __arch_get_timens_vdso_data(vd);
if (clk != CLOCK_MONOTONIC_RAW)
vd = &vd[CS_HRES_COARSE];
else
@ -92,7 +94,8 @@ static __always_inline int do_hres_timens(const struct vdso_data *vdns, clockid_
return 0;
}
#else
static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
static __always_inline
const struct vdso_data *__arch_get_timens_vdso_data(const struct vdso_data *vd)
{
return NULL;
}
@ -162,7 +165,7 @@ static __always_inline int do_hres(const struct vdso_data *vd, clockid_t clk,
static __always_inline int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
struct __kernel_timespec *ts)
{
const struct vdso_data *vd = __arch_get_timens_vdso_data();
const struct vdso_data *vd = __arch_get_timens_vdso_data(vdns);
const struct vdso_timestamp *vdso_ts = &vd->basetime[clk];
const struct timens_offset *offs = &vdns->offset[clk];
u64 nsec;
@ -310,7 +313,7 @@ __cvdso_gettimeofday_data(const struct vdso_data *vd,
if (unlikely(tz != NULL)) {
if (IS_ENABLED(CONFIG_TIME_NS) &&
vd->clock_mode == VDSO_CLOCKMODE_TIMENS)
vd = __arch_get_timens_vdso_data();
vd = __arch_get_timens_vdso_data(vd);
tz->tz_minuteswest = vd[CS_HRES_COARSE].tz_minuteswest;
tz->tz_dsttime = vd[CS_HRES_COARSE].tz_dsttime;
@ -333,7 +336,7 @@ __cvdso_time_data(const struct vdso_data *vd, __kernel_old_time_t *time)
if (IS_ENABLED(CONFIG_TIME_NS) &&
vd->clock_mode == VDSO_CLOCKMODE_TIMENS)
vd = __arch_get_timens_vdso_data();
vd = __arch_get_timens_vdso_data(vd);
t = READ_ONCE(vd[CS_HRES_COARSE].basetime[CLOCK_REALTIME].sec);
@ -363,7 +366,7 @@ int __cvdso_clock_getres_common(const struct vdso_data *vd, clockid_t clock,
if (IS_ENABLED(CONFIG_TIME_NS) &&
vd->clock_mode == VDSO_CLOCKMODE_TIMENS)
vd = __arch_get_timens_vdso_data();
vd = __arch_get_timens_vdso_data(vd);
/*
* Convert the clockid to a bitmask and use it to check which