From: Vincenzo Frascino <vincenzo.frascino@arm.com> To: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, clang-built-linux@googlegroups.com, x86@kernel.org Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Arnd Bergmann <arnd@arndb.de>, Russell King <linux@armlinux.org.uk>, Paul Burton <paul.burton@mips.com>, Thomas Gleixner <tglx@linutronix.de>, Andy Lutomirski <luto@kernel.org>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, Stephen Boyd <sboyd@kernel.org>, Mark Salyzyn <salyzyn@android.com>, Kees Cook <keescook@chromium.org>, Peter Collingbourne <pcc@google.com>, Dmitry Safonov <0x7f454c46@gmail.com>, Andrei Vagin <avagin@openvz.org>, Nick Desaulniers <ndesaulniers@google.com>, Marc Zyngier <maz@kernel.org>, Mark Rutland <Mark.Rutland@arm.com>, Paul Burton <paulburton@kernel.org> Subject: [PATCH v3 22/26] mips: vdso: Enable mips to use common headers Date: Fri, 13 Mar 2020 15:43:41 +0000 [thread overview] Message-ID: <20200313154345.56760-23-vincenzo.frascino@arm.com> (raw) In-Reply-To: <20200313154345.56760-1-vincenzo.frascino@arm.com> Enable mips to use only the common headers in the implementation of the vDSO library. Cc: Paul Burton <paulburton@kernel.org> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- arch/mips/include/asm/processor.h | 16 +------------- arch/mips/include/asm/vdso/gettimeofday.h | 4 ---- arch/mips/include/asm/vdso/processor.h | 27 +++++++++++++++++++++++ 3 files changed, 28 insertions(+), 19 deletions(-) create mode 100644 arch/mips/include/asm/vdso/processor.h diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index 7619ad319400..4c9cc667f3ed 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -22,6 +22,7 @@ #include <asm/dsemul.h> #include <asm/mipsregs.h> #include <asm/prefetch.h> +#include <asm/vdso/processor.h> /* * System setup and hardware flags.. @@ -385,21 +386,6 @@ unsigned long get_wchan(struct task_struct *p); #define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29]) #define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status) -#ifdef CONFIG_CPU_LOONGSON64 -/* - * Loongson-3's SFB (Store-Fill-Buffer) may buffer writes indefinitely when a - * tight read loop is executed, because reads take priority over writes & the - * hardware (incorrectly) doesn't ensure that writes will eventually occur. - * - * Since spin loops of any kind should have a cpu_relax() in them, force an SFB - * flush from cpu_relax() such that any pending writes will become visible as - * expected. - */ -#define cpu_relax() smp_mb() -#else -#define cpu_relax() barrier() -#endif - /* * Return_address is a replacement for __builtin_return_address(count) * which on certain architectures cannot reasonably be implemented in GCC diff --git a/arch/mips/include/asm/vdso/gettimeofday.h b/arch/mips/include/asm/vdso/gettimeofday.h index 88c3de1bdf22..c63ddcaea54c 100644 --- a/arch/mips/include/asm/vdso/gettimeofday.h +++ b/arch/mips/include/asm/vdso/gettimeofday.h @@ -13,12 +13,8 @@ #ifndef __ASSEMBLY__ -#include <linux/compiler.h> -#include <linux/time.h> - #include <asm/vdso/vdso.h> #include <asm/clocksource.h> -#include <asm/io.h> #include <asm/unistd.h> #include <asm/vdso.h> diff --git a/arch/mips/include/asm/vdso/processor.h b/arch/mips/include/asm/vdso/processor.h new file mode 100644 index 000000000000..511c95d735e6 --- /dev/null +++ b/arch/mips/include/asm/vdso/processor.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2020 ARM Ltd. + */ +#ifndef __ASM_VDSO_PROCESSOR_H +#define __ASM_VDSO_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +#ifdef CONFIG_CPU_LOONGSON64 +/* + * Loongson-3's SFB (Store-Fill-Buffer) may buffer writes indefinitely when a + * tight read loop is executed, because reads take priority over writes & the + * hardware (incorrectly) doesn't ensure that writes will eventually occur. + * + * Since spin loops of any kind should have a cpu_relax() in them, force an SFB + * flush from cpu_relax() such that any pending writes will become visible as + * expected. + */ +#define cpu_relax() smp_mb() +#else +#define cpu_relax() barrier() +#endif + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_VDSO_PROCESSOR_H */ -- 2.25.1
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, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, clang-built-linux@googlegroups.com, x86@kernel.org Cc: Mark Rutland <Mark.Rutland@arm.com>, Nick Desaulniers <ndesaulniers@google.com>, Dmitry Safonov <0x7f454c46@gmail.com>, Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>, Stephen Boyd <sboyd@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Paul Burton <paulburton@kernel.org>, Will Deacon <will.deacon@arm.com>, Russell King <linux@armlinux.org.uk>, Mark Salyzyn <salyzyn@android.com>, Paul Burton <paul.burton@mips.com>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>, Marc Zyngier <maz@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Peter Collingbourne <pcc@google.com>, Andrei Vagin <avagin@openvz.org> Subject: [PATCH v3 22/26] mips: vdso: Enable mips to use common headers Date: Fri, 13 Mar 2020 15:43:41 +0000 [thread overview] Message-ID: <20200313154345.56760-23-vincenzo.frascino@arm.com> (raw) In-Reply-To: <20200313154345.56760-1-vincenzo.frascino@arm.com> Enable mips to use only the common headers in the implementation of the vDSO library. Cc: Paul Burton <paulburton@kernel.org> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> --- arch/mips/include/asm/processor.h | 16 +------------- arch/mips/include/asm/vdso/gettimeofday.h | 4 ---- arch/mips/include/asm/vdso/processor.h | 27 +++++++++++++++++++++++ 3 files changed, 28 insertions(+), 19 deletions(-) create mode 100644 arch/mips/include/asm/vdso/processor.h diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index 7619ad319400..4c9cc667f3ed 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -22,6 +22,7 @@ #include <asm/dsemul.h> #include <asm/mipsregs.h> #include <asm/prefetch.h> +#include <asm/vdso/processor.h> /* * System setup and hardware flags.. @@ -385,21 +386,6 @@ unsigned long get_wchan(struct task_struct *p); #define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29]) #define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status) -#ifdef CONFIG_CPU_LOONGSON64 -/* - * Loongson-3's SFB (Store-Fill-Buffer) may buffer writes indefinitely when a - * tight read loop is executed, because reads take priority over writes & the - * hardware (incorrectly) doesn't ensure that writes will eventually occur. - * - * Since spin loops of any kind should have a cpu_relax() in them, force an SFB - * flush from cpu_relax() such that any pending writes will become visible as - * expected. - */ -#define cpu_relax() smp_mb() -#else -#define cpu_relax() barrier() -#endif - /* * Return_address is a replacement for __builtin_return_address(count) * which on certain architectures cannot reasonably be implemented in GCC diff --git a/arch/mips/include/asm/vdso/gettimeofday.h b/arch/mips/include/asm/vdso/gettimeofday.h index 88c3de1bdf22..c63ddcaea54c 100644 --- a/arch/mips/include/asm/vdso/gettimeofday.h +++ b/arch/mips/include/asm/vdso/gettimeofday.h @@ -13,12 +13,8 @@ #ifndef __ASSEMBLY__ -#include <linux/compiler.h> -#include <linux/time.h> - #include <asm/vdso/vdso.h> #include <asm/clocksource.h> -#include <asm/io.h> #include <asm/unistd.h> #include <asm/vdso.h> diff --git a/arch/mips/include/asm/vdso/processor.h b/arch/mips/include/asm/vdso/processor.h new file mode 100644 index 000000000000..511c95d735e6 --- /dev/null +++ b/arch/mips/include/asm/vdso/processor.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2020 ARM Ltd. + */ +#ifndef __ASM_VDSO_PROCESSOR_H +#define __ASM_VDSO_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +#ifdef CONFIG_CPU_LOONGSON64 +/* + * Loongson-3's SFB (Store-Fill-Buffer) may buffer writes indefinitely when a + * tight read loop is executed, because reads take priority over writes & the + * hardware (incorrectly) doesn't ensure that writes will eventually occur. + * + * Since spin loops of any kind should have a cpu_relax() in them, force an SFB + * flush from cpu_relax() such that any pending writes will become visible as + * expected. + */ +#define cpu_relax() smp_mb() +#else +#define cpu_relax() barrier() +#endif + +#endif /* __ASSEMBLY__ */ + +#endif /* __ASM_VDSO_PROCESSOR_H */ -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-03-13 15:45 UTC|newest] Thread overview: 133+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-13 15:43 [PATCH v3 00/26] Introduce common headers for vDSO Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 01/26] linux/const.h: Extract common header " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 02/26] linux/bits.h: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 03/26] linux/limits.h: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 04/26] x86:Introduce asm/vdso/clocksource.h Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 05/26] arm: Introduce asm/vdso/clocksource.h Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 06/26] arm64: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-15 18:29 ` Catalin Marinas 2020-03-15 18:29 ` Catalin Marinas 2020-03-15 18:29 ` Catalin Marinas 2020-03-13 15:43 ` [PATCH v3 07/26] mips: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 08/26] linux/clocksource.h: Extract common header for vDSO Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 09/26] linux/math64.h: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 10/26] linux/time.h: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 11/26] linux/time32.h: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 12/26] linux/time64.h: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 13/26] linux/jiffies.h: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 14/26] linux/ktime.h: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 15/26] common: Introduce processor.h Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 16/26] scripts: Fix the inclusion order in modpost Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 17/26] linux/elfnote.h: Replace elf.h with UAPI equivalent Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 18/26] arm64: Introduce asm/vdso/processor.h Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-15 18:30 ` Catalin Marinas 2020-03-15 18:30 ` Catalin Marinas 2020-03-15 18:30 ` Catalin Marinas 2020-03-16 9:42 ` Vincenzo Frascino 2020-03-16 9:42 ` Vincenzo Frascino 2020-03-16 9:42 ` Vincenzo Frascino 2020-03-16 10:22 ` Mark Rutland 2020-03-16 10:22 ` Mark Rutland 2020-03-16 10:22 ` Mark Rutland 2020-03-16 10:26 ` Catalin Marinas 2020-03-16 10:26 ` Catalin Marinas 2020-03-16 10:26 ` Catalin Marinas 2020-03-16 10:29 ` Mark Rutland 2020-03-16 10:29 ` Mark Rutland 2020-03-16 10:29 ` Mark Rutland 2020-03-16 10:30 ` Vincenzo Frascino 2020-03-16 10:30 ` Vincenzo Frascino 2020-03-16 10:30 ` Vincenzo Frascino 2020-03-16 10:29 ` Vincenzo Frascino 2020-03-16 10:29 ` Vincenzo Frascino 2020-03-16 10:29 ` Vincenzo Frascino 2020-03-16 10:34 ` Catalin Marinas 2020-03-16 10:34 ` Catalin Marinas 2020-03-16 10:34 ` Catalin Marinas 2020-03-16 10:55 ` Vincenzo Frascino 2020-03-16 10:55 ` Vincenzo Frascino 2020-03-16 10:55 ` Vincenzo Frascino 2020-03-16 11:22 ` Catalin Marinas 2020-03-16 11:22 ` Catalin Marinas 2020-03-16 11:22 ` Catalin Marinas 2020-03-16 13:35 ` Vincenzo Frascino 2020-03-16 13:35 ` Vincenzo Frascino 2020-03-16 13:35 ` Vincenzo Frascino 2020-03-16 14:43 ` Catalin Marinas 2020-03-16 14:43 ` Catalin Marinas 2020-03-16 14:43 ` Catalin Marinas 2020-03-16 15:33 ` Vincenzo Frascino 2020-03-16 15:33 ` Vincenzo Frascino 2020-03-16 15:33 ` Vincenzo Frascino 2020-03-16 15:49 ` Catalin Marinas 2020-03-16 15:49 ` Catalin Marinas 2020-03-16 15:49 ` Catalin Marinas 2020-03-16 16:05 ` Vincenzo Frascino 2020-03-16 16:05 ` Vincenzo Frascino 2020-03-16 16:05 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 19/26] arm64: vdso: Include common headers in the vdso library Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-15 18:30 ` Catalin Marinas 2020-03-15 18:30 ` Catalin Marinas 2020-03-15 18:30 ` Catalin Marinas 2020-03-13 15:43 ` [PATCH v3 20/26] arm64: vdso32: " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-15 18:30 ` Catalin Marinas 2020-03-15 18:30 ` Catalin Marinas 2020-03-15 18:30 ` Catalin Marinas 2020-03-13 15:43 ` [PATCH v3 21/26] arm64: Introduce asm/vdso/arch_timer.h Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-15 18:32 ` Catalin Marinas 2020-03-15 18:32 ` Catalin Marinas 2020-03-15 18:32 ` Catalin Marinas 2020-03-16 15:37 ` Vincenzo Frascino 2020-03-16 15:37 ` Vincenzo Frascino 2020-03-16 15:37 ` Vincenzo Frascino 2020-04-09 13:26 ` Will Deacon 2020-04-09 13:26 ` Will Deacon 2020-04-09 13:26 ` Will Deacon 2020-04-09 13:36 ` Vincenzo Frascino 2020-04-09 13:36 ` Vincenzo Frascino 2020-04-09 13:36 ` Vincenzo Frascino 2020-03-16 10:28 ` Mark Rutland 2020-03-16 10:28 ` Mark Rutland 2020-03-16 10:28 ` Mark Rutland 2020-03-13 15:43 ` Vincenzo Frascino [this message] 2020-03-13 15:43 ` [PATCH v3 22/26] mips: vdso: Enable mips to use common headers Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 23/26] x86: vdso: Enable x86 " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 24/26] arm: vdso: Enable arm " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 25/26] lib: vdso: Enable " Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` [PATCH v3 26/26] arm64: vdso32: Enable Clang Compilation Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-13 15:43 ` Vincenzo Frascino 2020-03-16 9:17 ` Catalin Marinas 2020-03-16 9:17 ` Catalin Marinas 2020-03-16 9:17 ` Catalin Marinas 2020-03-13 16:19 ` [PATCH v3 00/26] Introduce common headers for vDSO Dmitry Safonov 2020-03-13 16:19 ` Dmitry Safonov 2020-03-15 10:02 ` Thomas Gleixner 2020-03-15 10:02 ` Thomas Gleixner
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