From c68edf22e23b9bd65502f7bbb373c00426868e9a Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Sun, 17 Oct 2021 13:42:11 +0100 Subject: [PATCH] clocksource/drivers/arm_arch_timer: Extend write side of timer register accessors to u64 The various accessors for the timer sysreg and MMIO registers are currently hardwired to 32bit. However, we are about to introduce the use of the CVAL registers, which require a 64bit access. Upgrade the write side of the accessors to take a 64bit value (the read side is left untouched as we don't plan to ever read back any of these registers). No functional change expected. Reviewed-by: Oliver Upton Reviewed-by: Mark Rutland Tested-by: Mark Rutland Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211017124225.3018098-4-maz@kernel.org Signed-off-by: Daniel Lezcano Signed-off-by: hongrongxuan --- arch/arm/include/asm/arch_timer.h | 10 +++++----- arch/arm64/include/asm/arch_timer.h | 2 +- drivers/clocksource/arm_arch_timer.c | 10 +++++----- 3 files changed, 11 insertions(+), 11 deletions(-) diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h index 7d757085c61a..1482e70da7d3 100644 --- a/arch/arm/include/asm/arch_timer.h +++ b/arch/arm/include/asm/arch_timer.h @@ -24,15 +24,15 @@ int arch_timer_arch_init(void); * the code. At least it does so with a recent GCC (4.6.3). */ static __always_inline -void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u32 val) +void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u64 val) { if (access == ARCH_TIMER_PHYS_ACCESS) { switch (reg) { case ARCH_TIMER_REG_CTRL: - asm volatile("mcr p15, 0, %0, c14, c2, 1" : : "r" (val)); + asm volatile("mcr p15, 0, %0, c14, c2, 1" : : "r" ((u32)val)); break; case ARCH_TIMER_REG_TVAL: - asm volatile("mcr p15, 0, %0, c14, c2, 0" : : "r" (val)); + asm volatile("mcr p15, 0, %0, c14, c2, 0" : : "r" ((u32)val)); break; default: BUILD_BUG(); @@ -40,10 +40,10 @@ void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u32 val) } else if (access == ARCH_TIMER_VIRT_ACCESS) { switch (reg) { case ARCH_TIMER_REG_CTRL: - asm volatile("mcr p15, 0, %0, c14, c3, 1" : : "r" (val)); + asm volatile("mcr p15, 0, %0, c14, c3, 1" : : "r" ((u32)val)); break; case ARCH_TIMER_REG_TVAL: - asm volatile("mcr p15, 0, %0, c14, c3, 0" : : "r" (val)); + asm volatile("mcr p15, 0, %0, c14, c3, 0" : : "r" ((u32)val)); break; default: BUILD_BUG(); diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h index 8332fcfb08e8..43f827b680d0 100644 --- a/arch/arm64/include/asm/arch_timer.h +++ b/arch/arm64/include/asm/arch_timer.h @@ -89,7 +89,7 @@ static inline notrace u64 arch_timer_read_cntvct_el0(void) * the code. */ static __always_inline -void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u32 val) +void arch_timer_reg_write_cp15(int access, enum arch_timer_reg reg, u64 val) { if (access == ARCH_TIMER_PHYS_ACCESS) { switch (reg) { diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 9cbbd05e76e8..b2cc7d2f7275 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -85,17 +85,17 @@ early_param("clocksource.arm_arch_timer.evtstrm", early_evtstrm_cfg); */ static __always_inline -void arch_timer_reg_write(int access, enum arch_timer_reg reg, u32 val, +void arch_timer_reg_write(int access, enum arch_timer_reg reg, u64 val, struct clock_event_device *clk) { if (access == ARCH_TIMER_MEM_PHYS_ACCESS) { struct arch_timer *timer = to_arch_timer(clk); switch (reg) { case ARCH_TIMER_REG_CTRL: - writel_relaxed(val, timer->base + CNTP_CTL); + writel_relaxed((u32)val, timer->base + CNTP_CTL); break; case ARCH_TIMER_REG_TVAL: - writel_relaxed(val, timer->base + CNTP_TVAL); + writel_relaxed((u32)val, timer->base + CNTP_TVAL); break; default: BUILD_BUG(); @@ -104,10 +104,10 @@ void arch_timer_reg_write(int access, enum arch_timer_reg reg, u32 val, struct arch_timer *timer = to_arch_timer(clk); switch (reg) { case ARCH_TIMER_REG_CTRL: - writel_relaxed(val, timer->base + CNTV_CTL); + writel_relaxed((u32)val, timer->base + CNTV_CTL); break; case ARCH_TIMER_REG_TVAL: - writel_relaxed(val, timer->base + CNTV_TVAL); + writel_relaxed((u32)val, timer->base + CNTV_TVAL); break; default: BUILD_BUG();