mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 06:36:46 +07:00
ed75e8f60b
With the move to UAPI headers, such #ifdefs are no longer necessary.
Fixes: 361f8aee9b ("vdso: Define standardized vdso_datapage")
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Huw Davies <huw@codeweavers.com>
Cc: Shijith Thotton <sthotton@marvell.com>
Cc: Andre Przywara <andre.przywara@arm.com>
Link: https://lkml.kernel.org/r/20190624135624.GB29120@arrakis.emea.arm.com
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __VDSO_DATAPAGE_H
|
|
#define __VDSO_DATAPAGE_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/bits.h>
|
|
#include <linux/time.h>
|
|
#include <linux/types.h>
|
|
|
|
#define VDSO_BASES (CLOCK_TAI + 1)
|
|
#define VDSO_HRES (BIT(CLOCK_REALTIME) | \
|
|
BIT(CLOCK_MONOTONIC) | \
|
|
BIT(CLOCK_BOOTTIME) | \
|
|
BIT(CLOCK_TAI))
|
|
#define VDSO_COARSE (BIT(CLOCK_REALTIME_COARSE) | \
|
|
BIT(CLOCK_MONOTONIC_COARSE))
|
|
#define VDSO_RAW (BIT(CLOCK_MONOTONIC_RAW))
|
|
|
|
#define CS_HRES_COARSE 0
|
|
#define CS_RAW 1
|
|
#define CS_BASES (CS_RAW + 1)
|
|
|
|
/**
|
|
* struct vdso_timestamp - basetime per clock_id
|
|
* @sec: seconds
|
|
* @nsec: nanoseconds
|
|
*
|
|
* There is one vdso_timestamp object in vvar for each vDSO-accelerated
|
|
* clock_id. For high-resolution clocks, this encodes the time
|
|
* corresponding to vdso_data.cycle_last. For coarse clocks this encodes
|
|
* the actual time.
|
|
*
|
|
* To be noticed that for highres clocks nsec is left-shifted by
|
|
* vdso_data.cs[x].shift.
|
|
*/
|
|
struct vdso_timestamp {
|
|
u64 sec;
|
|
u64 nsec;
|
|
};
|
|
|
|
/**
|
|
* struct vdso_data - vdso datapage representation
|
|
* @seq: timebase sequence counter
|
|
* @clock_mode: clock mode
|
|
* @cycle_last: timebase at clocksource init
|
|
* @mask: clocksource mask
|
|
* @mult: clocksource multiplier
|
|
* @shift: clocksource shift
|
|
* @basetime[clock_id]: basetime per clock_id
|
|
* @tz_minuteswest: minutes west of Greenwich
|
|
* @tz_dsttime: type of DST correction
|
|
* @hrtimer_res: hrtimer resolution
|
|
* @__unused: unused
|
|
*
|
|
* vdso_data will be accessed by 64 bit and compat code at the same time
|
|
* so we should be careful before modifying this structure.
|
|
*/
|
|
struct vdso_data {
|
|
u32 seq;
|
|
|
|
s32 clock_mode;
|
|
u64 cycle_last;
|
|
u64 mask;
|
|
u32 mult;
|
|
u32 shift;
|
|
|
|
struct vdso_timestamp basetime[VDSO_BASES];
|
|
|
|
s32 tz_minuteswest;
|
|
s32 tz_dsttime;
|
|
u32 hrtimer_res;
|
|
u32 __unused;
|
|
};
|
|
|
|
/*
|
|
* We use the hidden visibility to prevent the compiler from generating a GOT
|
|
* relocation. Not only is going through a GOT useless (the entry couldn't and
|
|
* must not be overridden by another library), it does not even work: the linker
|
|
* cannot generate an absolute address to the data page.
|
|
*
|
|
* With the hidden visibility, the compiler simply generates a PC-relative
|
|
* relocation, and this is what we need.
|
|
*/
|
|
extern struct vdso_data _vdso_data[CS_BASES] __attribute__((visibility("hidden")));
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* __VDSO_DATAPAGE_H */
|