diff options
author | Vincenzo Frascino <vincenzo.frascino@arm.com> | 2019-06-21 10:52:46 +0100 |
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committer | Paul Burton <paul.burton@mips.com> | 2019-07-25 21:45:05 -0700 |
commit | 24640f233b466051ad3a5d2786d2951e43026c9d (patch) | |
tree | ca9acaf821110f4d249dd4a250d7a9b740675261 /arch/mips/include/asm/vdso/vsyscall.h | |
parent | c2aeaaea175652af6610f97a0de6d7cd07311e18 (diff) |
mips: Add support for generic vDSO
The mips vDSO library requires some adaptations to take advantage of the
newly introduced generic vDSO library.
Introduce the following changes:
- Modification of vdso.c to be compliant with the common vdso datapage
- Use of lib/vdso for gettimeofday
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
[paul.burton@mips.com: Prepend $(src) to config-n32-o32-env.c path.]
Signed-off-by: Paul Burton <paul.burton@mips.com>
Diffstat (limited to 'arch/mips/include/asm/vdso/vsyscall.h')
-rw-r--r-- | arch/mips/include/asm/vdso/vsyscall.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/mips/include/asm/vdso/vsyscall.h b/arch/mips/include/asm/vdso/vsyscall.h new file mode 100644 index 000000000000..195314732233 --- /dev/null +++ b/arch/mips/include/asm/vdso/vsyscall.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_VDSO_VSYSCALL_H +#define __ASM_VDSO_VSYSCALL_H + +#ifndef __ASSEMBLY__ + +#include <linux/timekeeper_internal.h> +#include <vdso/datapage.h> + +extern struct vdso_data *vdso_data; + +/* + * Update the vDSO data page to keep in sync with kernel timekeeping. + */ +static __always_inline +struct vdso_data *__mips_get_k_vdso_data(void) +{ + return vdso_data; +} +#define __arch_get_k_vdso_data __mips_get_k_vdso_data + +static __always_inline +int __mips_get_clock_mode(struct timekeeper *tk) +{ + u32 clock_mode = tk->tkr_mono.clock->archdata.vdso_clock_mode; + + return clock_mode; +} +#define __arch_get_clock_mode __mips_get_clock_mode + +static __always_inline +int __mips_use_vsyscall(struct vdso_data *vdata) +{ + return (vdata[CS_HRES_COARSE].clock_mode != VDSO_CLOCK_NONE); +} +#define __arch_use_vsyscall __mips_use_vsyscall + +/* The asm-generic header needs to be included after the definitions above */ +#include <asm-generic/vdso/vsyscall.h> + +#endif /* !__ASSEMBLY__ */ + +#endif /* __ASM_VDSO_VSYSCALL_H */ |