diff options
Diffstat (limited to 'target/linux/sunxi/patches-4.14/031-arm64-Implement-arch_counter_get_cntpct-to-read-the-.patch')
| -rw-r--r-- | target/linux/sunxi/patches-4.14/031-arm64-Implement-arch_counter_get_cntpct-to-read-the-.patch | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/target/linux/sunxi/patches-4.14/031-arm64-Implement-arch_counter_get_cntpct-to-read-the-.patch b/target/linux/sunxi/patches-4.14/031-arm64-Implement-arch_counter_get_cntpct-to-read-the-.patch deleted file mode 100644 index 60f0cb6c9b..0000000000 --- a/target/linux/sunxi/patches-4.14/031-arm64-Implement-arch_counter_get_cntpct-to-read-the-.patch +++ /dev/null @@ -1,118 +0,0 @@ -From f2e600c149fda3453344f89c7e9353fe278ebd32 Mon Sep 17 00:00:00 2001 -From: Christoffer Dall <christoffer.dall@linaro.org> -Date: Wed, 18 Oct 2017 13:06:25 +0200 -Subject: [PATCH] arm64: Implement arch_counter_get_cntpct to read the physical - counter - -As we are about to use the physical counter on arm64 systems that have -KVM support, implement arch_counter_get_cntpct() and the associated -errata workaround functionality for stable timer reads. - -Cc: Will Deacon <will.deacon@arm.com> -Cc: Mark Rutland <mark.rutland@arm.com> -Acked-by: Catalin Marinas <catalin.marinas@arm.com> -Acked-by: Marc Zyngier <marc.zyngier@arm.com> -Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> ---- - arch/arm64/include/asm/arch_timer.h | 8 +++----- - drivers/clocksource/arm_arch_timer.c | 23 +++++++++++++++++++++++ - 2 files changed, 26 insertions(+), 5 deletions(-) - ---- a/arch/arm64/include/asm/arch_timer.h -+++ b/arch/arm64/include/asm/arch_timer.h -@@ -52,6 +52,7 @@ struct arch_timer_erratum_workaround { - const char *desc; - u32 (*read_cntp_tval_el0)(void); - u32 (*read_cntv_tval_el0)(void); -+ u64 (*read_cntpct_el0)(void); - u64 (*read_cntvct_el0)(void); - int (*set_next_event_phys)(unsigned long, struct clock_event_device *); - int (*set_next_event_virt)(unsigned long, struct clock_event_device *); -@@ -148,11 +149,8 @@ static inline void arch_timer_set_cntkct - - static inline u64 arch_counter_get_cntpct(void) - { -- /* -- * AArch64 kernel and user space mandate the use of CNTVCT. -- */ -- BUG(); -- return 0; -+ isb(); -+ return arch_timer_reg_read_stable(cntpct_el0); - } - - static inline u64 arch_counter_get_cntvct(void) ---- a/drivers/clocksource/arm_arch_timer.c -+++ b/drivers/clocksource/arm_arch_timer.c -@@ -217,6 +217,11 @@ static u32 notrace fsl_a008585_read_cntv - return __fsl_a008585_read_reg(cntv_tval_el0); - } - -+static u64 notrace fsl_a008585_read_cntpct_el0(void) -+{ -+ return __fsl_a008585_read_reg(cntpct_el0); -+} -+ - static u64 notrace fsl_a008585_read_cntvct_el0(void) - { - return __fsl_a008585_read_reg(cntvct_el0); -@@ -258,6 +263,11 @@ static u32 notrace hisi_161010101_read_c - return __hisi_161010101_read_reg(cntv_tval_el0); - } - -+static u64 notrace hisi_161010101_read_cntpct_el0(void) -+{ -+ return __hisi_161010101_read_reg(cntpct_el0); -+} -+ - static u64 notrace hisi_161010101_read_cntvct_el0(void) - { - return __hisi_161010101_read_reg(cntvct_el0); -@@ -288,6 +298,15 @@ static struct ate_acpi_oem_info hisi_161 - #endif - - #ifdef CONFIG_ARM64_ERRATUM_858921 -+static u64 notrace arm64_858921_read_cntpct_el0(void) -+{ -+ u64 old, new; -+ -+ old = read_sysreg(cntpct_el0); -+ new = read_sysreg(cntpct_el0); -+ return (((old ^ new) >> 32) & 1) ? old : new; -+} -+ - static u64 notrace arm64_858921_read_cntvct_el0(void) - { - u64 old, new; -@@ -346,6 +365,7 @@ static const struct arch_timer_erratum_w - .desc = "Freescale erratum a005858", - .read_cntp_tval_el0 = fsl_a008585_read_cntp_tval_el0, - .read_cntv_tval_el0 = fsl_a008585_read_cntv_tval_el0, -+ .read_cntpct_el0 = fsl_a008585_read_cntpct_el0, - .read_cntvct_el0 = fsl_a008585_read_cntvct_el0, - .set_next_event_phys = erratum_set_next_event_tval_phys, - .set_next_event_virt = erratum_set_next_event_tval_virt, -@@ -358,6 +378,7 @@ static const struct arch_timer_erratum_w - .desc = "HiSilicon erratum 161010101", - .read_cntp_tval_el0 = hisi_161010101_read_cntp_tval_el0, - .read_cntv_tval_el0 = hisi_161010101_read_cntv_tval_el0, -+ .read_cntpct_el0 = hisi_161010101_read_cntpct_el0, - .read_cntvct_el0 = hisi_161010101_read_cntvct_el0, - .set_next_event_phys = erratum_set_next_event_tval_phys, - .set_next_event_virt = erratum_set_next_event_tval_virt, -@@ -368,6 +389,7 @@ static const struct arch_timer_erratum_w - .desc = "HiSilicon erratum 161010101", - .read_cntp_tval_el0 = hisi_161010101_read_cntp_tval_el0, - .read_cntv_tval_el0 = hisi_161010101_read_cntv_tval_el0, -+ .read_cntpct_el0 = hisi_161010101_read_cntpct_el0, - .read_cntvct_el0 = hisi_161010101_read_cntvct_el0, - .set_next_event_phys = erratum_set_next_event_tval_phys, - .set_next_event_virt = erratum_set_next_event_tval_virt, -@@ -378,6 +400,7 @@ static const struct arch_timer_erratum_w - .match_type = ate_match_local_cap_id, - .id = (void *)ARM64_WORKAROUND_858921, - .desc = "ARM erratum 858921", -+ .read_cntpct_el0 = arm64_858921_read_cntpct_el0, - .read_cntvct_el0 = arm64_858921_read_cntvct_el0, - }, - #endif |