From: Vincenzo Frascino <vincenzo.frascino@arm.com> To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Arnd Bergmann <arnd@arndb.de>, Catalin Marinas <catalin.marinas@arm.com>, Daniel Lezcano <daniel.lezcano@linaro.org>, Will Deacon <will.deacon@arm.com>, Russell King <linux@armlinux.org.uk>, Ralf Baechle <ralf@linux-mips.org>, Mark Salyzyn <salyzyn@android.com>, Paul Burton <paul.burton@mips.com>, Thomas Gleixner <tglx@linutronix.de>, Peter Collingbourne <pcc@google.com> Subject: [PATCH v3 01/24] kernel: Standardize vdso_datapage Date: Thu, 13 Dec 2018 16:57:23 +0000 [thread overview] Message-ID: <20181213165746.56930-2-vincenzo.frascino@arm.com> (raw) In-Reply-To: <20181213165746.56930-1-vincenzo.frascino@arm.com> In an effort to unify the common code for managing the vdso library in between all the architectures that support it, this patch tries to provide a common format for the vdso datapage. As a result of this, this patch generalized the data structures in vgtod.h from x86 private includes to general includes (include/vdso). Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- include/vdso/datapage.h | 60 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 include/vdso/datapage.h diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h new file mode 100644 index 000000000000..e88678f918e5 --- /dev/null +++ b/include/vdso/datapage.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __VDSO_DATAPAGE_H +#define __VDSO_DATAPAGE_H + +#ifdef __KERNEL__ + +#ifndef __ASSEMBLY__ + +#include <linux/bits.h> +#include <linux/types.h> +#include <linux/time.h> + +#define VDSO_BASES (CLOCK_TAI + 1) +#define VDSO_HRES (BIT(CLOCK_REALTIME) | \ + BIT(CLOCK_MONOTONIC) | \ + BIT(CLOCK_MONOTONIC_RAW) | \ + BIT(CLOCK_BOOTTIME) | \ + BIT(CLOCK_TAI)) +#define VDSO_COARSE (BIT(CLOCK_REALTIME_COARSE) | \ + BIT(CLOCK_MONOTONIC_COARSE)) + +/* + * 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 nsec is left-shifted by vdso_data.shift. + */ +struct vdso_timestamp { + u64 sec; + u64 nsec; +}; + +/* + * vdso_data will be accessed by 32 and 64 bit code at the same time + * so we should be careful before modifying this structure. + */ +struct vdso_data { + u32 seq; /* Timebase sequence counter */ + + s32 clock_mode; + u64 cycle_last; /* Timebase at clocksource init */ + u64 mask; /* Clocksource mask (mono = raw) */ + u32 mult; /* Clocksource multiplier */ + u32 shift; /* Clocksource shift (mono = raw) */ + + struct vdso_timestamp basetime[VDSO_BASES]; + + s32 tz_minuteswest; /* Timezone definitions */ + s32 tz_dsttime; + u32 use_syscall; + u32 __reserved; +}; + +#endif /* !__ASSEMBLY__ */ + +#endif /* __KERNEL__ */ + +#endif /* __VDSO_DATAPAGE_H */ -- 2.19.2
WARNING: multiple messages have this Message-ID (diff)
From: Vincenzo Frascino <vincenzo.frascino@arm.com> To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Arnd Bergmann <arnd@arndb.de>, Russell King <linux@armlinux.org.uk>, Ralf Baechle <ralf@linux-mips.org>, Paul Burton <paul.burton@mips.com>, Daniel Lezcano <daniel.lezcano@linaro.org>, Thomas Gleixner <tglx@linutronix.de>, Mark Salyzyn <salyzyn@android.com>, Peter Collingbourne <pcc@google.com> Subject: [PATCH v3 01/24] kernel: Standardize vdso_datapage Date: Thu, 13 Dec 2018 16:57:23 +0000 [thread overview] Message-ID: <20181213165746.56930-2-vincenzo.frascino@arm.com> (raw) Message-ID: <20181213165723.tV7w5mVw4jvOMilCn-U1xPszoRPup1kOFf3qWvko9ZI@z> (raw) In-Reply-To: <20181213165746.56930-1-vincenzo.frascino@arm.com> In an effort to unify the common code for managing the vdso library in between all the architectures that support it, this patch tries to provide a common format for the vdso datapage. As a result of this, this patch generalized the data structures in vgtod.h from x86 private includes to general includes (include/vdso). Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- include/vdso/datapage.h | 60 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 include/vdso/datapage.h diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h new file mode 100644 index 000000000000..e88678f918e5 --- /dev/null +++ b/include/vdso/datapage.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __VDSO_DATAPAGE_H +#define __VDSO_DATAPAGE_H + +#ifdef __KERNEL__ + +#ifndef __ASSEMBLY__ + +#include <linux/bits.h> +#include <linux/types.h> +#include <linux/time.h> + +#define VDSO_BASES (CLOCK_TAI + 1) +#define VDSO_HRES (BIT(CLOCK_REALTIME) | \ + BIT(CLOCK_MONOTONIC) | \ + BIT(CLOCK_MONOTONIC_RAW) | \ + BIT(CLOCK_BOOTTIME) | \ + BIT(CLOCK_TAI)) +#define VDSO_COARSE (BIT(CLOCK_REALTIME_COARSE) | \ + BIT(CLOCK_MONOTONIC_COARSE)) + +/* + * 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 nsec is left-shifted by vdso_data.shift. + */ +struct vdso_timestamp { + u64 sec; + u64 nsec; +}; + +/* + * vdso_data will be accessed by 32 and 64 bit code at the same time + * so we should be careful before modifying this structure. + */ +struct vdso_data { + u32 seq; /* Timebase sequence counter */ + + s32 clock_mode; + u64 cycle_last; /* Timebase at clocksource init */ + u64 mask; /* Clocksource mask (mono = raw) */ + u32 mult; /* Clocksource multiplier */ + u32 shift; /* Clocksource shift (mono = raw) */ + + struct vdso_timestamp basetime[VDSO_BASES]; + + s32 tz_minuteswest; /* Timezone definitions */ + s32 tz_dsttime; + u32 use_syscall; + u32 __reserved; +}; + +#endif /* !__ASSEMBLY__ */ + +#endif /* __KERNEL__ */ + +#endif /* __VDSO_DATAPAGE_H */ -- 2.19.2
next prev parent reply other threads:[~2018-12-13 16:57 UTC|newest] Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-12-13 16:57 [PATCH v3 00/24] Unify vDSOs across more architectures Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino [this message] 2018-12-13 16:57 ` [PATCH v3 01/24] kernel: Standardize vdso_datapage Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 02/24] kernel: Define gettimeofday vdso common code Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-14 18:15 ` Mark Salyzyn 2018-12-14 18:15 ` Mark Salyzyn 2019-01-10 10:36 ` Vincenzo Frascino 2019-01-10 10:36 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 03/24] arm64: Build vDSO with -ffixed-x18 Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 04/24] arm64: Substitute gettimeofday with C implementation Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 05/24] arm64: compat: Alloc separate pages for vectors and sigpage Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 06/24] arm64: compat: Split kuser32 Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 07/24] arm64: compat: Refactor aarch32_alloc_vdso_pages() Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 08/24] arm64: compat: Add KUSER_HELPERS config option Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 09/24] arm64: compat: Add missing syscall numbers Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 10/24] arm64: compat: Expose signal related structures Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 11/24] arm64: compat: Generate asm offsets for signals Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 12/24] lib: vdso: Add compat support Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 13/24] arm64: compat: Add vDSO Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 14/24] arm64: Refactor vDSO code Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 15/24] arm64: compat: vDSO setup for compat layer Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 16/24] arm64: elf: vDSO code page discovery Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 17/24] arm64: compat: Get sigreturn trampolines from vDSO Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 18/24] arm64: Add vDSO compat support Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-17 15:26 ` Mark Salyzyn 2018-12-17 15:26 ` Mark Salyzyn 2019-01-10 10:39 ` Vincenzo Frascino 2019-01-10 10:39 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 19/24] arm64: Enable compat vDSO support Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 20/24] arm: Add support for generic vDSO Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 21/24] mips: Introduce vdso_direct Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 22/24] clock: csrc-4k: Add support for vdso_direct Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 23/24] clock: gic-timer: " Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino 2018-12-13 16:57 ` [PATCH v3 24/24] mips: Add support for generic vDSO Vincenzo Frascino 2018-12-13 16:57 ` Vincenzo Frascino
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