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Mon, 23 Dec 2019 14:31:02 +0000 (UTC) Message-Id: <47701b5fb73cf536db074031db8e6e3fa3695168.1577111365.git.christophe.leroy@c-s.fr> In-Reply-To: References: From: Christophe Leroy Subject: [RFC PATCH v2 01/10] lib: vdso: ensure all arches have 32bit fallback To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , arnd@arndb.de, tglx@linutronix.de, vincenzo.frascino@arm.com, luto@kernel.org Date: Mon, 23 Dec 2019 14:31:02 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191223_063110_455023_DCF4DAFD X-CRM114-Status: GOOD ( 10.39 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [93.17.236.30 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org In order to simplify next step which moves fallback call at arch level, ensure all arches have a 32bit fallback instead of handling the lack of 32bit fallback in the common code based on VDSO_HAS_32BIT_FALLBACK Signed-off-by: Christophe Leroy --- arch/arm/include/asm/vdso/gettimeofday.h | 26 +++++++++++++++++++++ arch/arm64/include/asm/vdso/compat_gettimeofday.h | 2 -- arch/arm64/include/asm/vdso/gettimeofday.h | 26 +++++++++++++++++++++ arch/mips/include/asm/vdso/gettimeofday.h | 28 +++++++++++++++++++++-- arch/x86/include/asm/vdso/gettimeofday.h | 28 +++++++++++++++++++++-- lib/vdso/gettimeofday.c | 10 -------- 6 files changed, 104 insertions(+), 16 deletions(-) diff --git a/arch/arm/include/asm/vdso/gettimeofday.h b/arch/arm/include/asm/vdso/gettimeofday.h index 0ad2429c324f..55f8ad6e7777 100644 --- a/arch/arm/include/asm/vdso/gettimeofday.h +++ b/arch/arm/include/asm/vdso/gettimeofday.h @@ -70,6 +70,32 @@ static __always_inline int clock_getres_fallback( return ret; } +static __always_inline +long clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + struct __kernel_timespec ts; + int ret = clock_gettime_fallback(clock, &ts); + + if (likely(!ret)) { + _ts->tv_sec = ts.tv_sec; + _ts->tv_nsec = ts.tv_nsec; + } + return ret; +} + +static __always_inline +long clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + struct __kernel_timespec ts; + int ret = clock_getres_fallback(clock, &ts); + + if (likely(!ret && _ts)) { + _ts->tv_sec = ts.tv_sec; + _ts->tv_nsec = ts.tv_nsec; + } + return ret; +} + static __always_inline u64 __arch_get_hw_counter(int clock_mode) { #ifdef CONFIG_ARM_ARCH_TIMER diff --git a/arch/arm64/include/asm/vdso/compat_gettimeofday.h b/arch/arm64/include/asm/vdso/compat_gettimeofday.h index c50ee1b7d5cd..bab700e37a03 100644 --- a/arch/arm64/include/asm/vdso/compat_gettimeofday.h +++ b/arch/arm64/include/asm/vdso/compat_gettimeofday.h @@ -16,8 +16,6 @@ #define VDSO_HAS_CLOCK_GETRES 1 -#define VDSO_HAS_32BIT_FALLBACK 1 - static __always_inline int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz) diff --git a/arch/arm64/include/asm/vdso/gettimeofday.h b/arch/arm64/include/asm/vdso/gettimeofday.h index b08f476b72b4..c41c86a07423 100644 --- a/arch/arm64/include/asm/vdso/gettimeofday.h +++ b/arch/arm64/include/asm/vdso/gettimeofday.h @@ -66,6 +66,32 @@ int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts) return ret; } +static __always_inline +long clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + struct __kernel_timespec ts; + int ret = clock_gettime_fallback(clock, &ts); + + if (likely(!ret)) { + _ts->tv_sec = ts.tv_sec; + _ts->tv_nsec = ts.tv_nsec; + } + return ret; +} + +static __always_inline +long clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + struct __kernel_timespec ts; + int ret = clock_getres_fallback(clock, &ts); + + if (likely(!ret && _ts)) { + _ts->tv_sec = ts.tv_sec; + _ts->tv_nsec = ts.tv_nsec; + } + return ret; +} + static __always_inline u64 __arch_get_hw_counter(s32 clock_mode) { u64 res; diff --git a/arch/mips/include/asm/vdso/gettimeofday.h b/arch/mips/include/asm/vdso/gettimeofday.h index b08825531e9f..60608e930a5c 100644 --- a/arch/mips/include/asm/vdso/gettimeofday.h +++ b/arch/mips/include/asm/vdso/gettimeofday.h @@ -109,8 +109,6 @@ static __always_inline int clock_getres_fallback( #if _MIPS_SIM != _MIPS_SIM_ABI64 -#define VDSO_HAS_32BIT_FALLBACK 1 - static __always_inline long clock_gettime32_fallback( clockid_t _clkid, struct old_timespec32 *_ts) @@ -150,6 +148,32 @@ static __always_inline int clock_getres32_fallback( return error ? -ret : ret; } +#else +static __always_inline +long clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + struct __kernel_timespec ts; + int ret = clock_gettime_fallback(clock, &ts); + + if (likely(!ret)) { + _ts->tv_sec = ts.tv_sec; + _ts->tv_nsec = ts.tv_nsec; + } + return ret; +} + +static __always_inline +long clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + struct __kernel_timespec ts; + int ret = clock_getres_fallback(clock, &ts); + + if (likely(!ret && _ts)) { + _ts->tv_sec = ts.tv_sec; + _ts->tv_nsec = ts.tv_nsec; + } + return ret; +} #endif #ifdef CONFIG_CSRC_R4K diff --git a/arch/x86/include/asm/vdso/gettimeofday.h b/arch/x86/include/asm/vdso/gettimeofday.h index e9ee139cf29e..e1e16c2fdba0 100644 --- a/arch/x86/include/asm/vdso/gettimeofday.h +++ b/arch/x86/include/asm/vdso/gettimeofday.h @@ -94,9 +94,33 @@ long clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts) return ret; } -#else +static __always_inline +long clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + struct __kernel_timespec ts; + int ret = clock_gettime_fallback(clock, &ts); -#define VDSO_HAS_32BIT_FALLBACK 1 + if (likely(!ret)) { + _ts->tv_sec = ts.tv_sec; + _ts->tv_nsec = ts.tv_nsec; + } + return ret; +} + +static __always_inline +long clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts) +{ + struct __kernel_timespec ts; + int ret = clock_getres_fallback(clock, &ts); + + if (likely(!ret && _ts)) { + _ts->tv_sec = ts.tv_sec; + _ts->tv_nsec = ts.tv_nsec; + } + return ret; +} + +#else static __always_inline long clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts) diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c index 9ecfd3b547ba..59189ed49352 100644 --- a/lib/vdso/gettimeofday.c +++ b/lib/vdso/gettimeofday.c @@ -125,13 +125,8 @@ __cvdso_clock_gettime32(clockid_t clock, struct old_timespec32 *res) ret = __cvdso_clock_gettime_common(clock, &ts); -#ifdef VDSO_HAS_32BIT_FALLBACK if (unlikely(ret)) return clock_gettime32_fallback(clock, res); -#else - if (unlikely(ret)) - ret = clock_gettime_fallback(clock, &ts); -#endif if (likely(!ret)) { res->tv_sec = ts.tv_sec; @@ -238,13 +233,8 @@ __cvdso_clock_getres_time32(clockid_t clock, struct old_timespec32 *res) ret = __cvdso_clock_getres_common(clock, &ts); -#ifdef VDSO_HAS_32BIT_FALLBACK if (unlikely(ret)) return clock_getres32_fallback(clock, res); -#else - if (unlikely(ret)) - ret = clock_getres_fallback(clock, &ts); -#endif if (likely(!ret && res)) { res->tv_sec = ts.tv_sec;