diff options
61 files changed, 1479 insertions, 1041 deletions
diff --git a/Documentation/devicetree/bindings/arm/arch_timer.txt b/Documentation/devicetree/bindings/arm/arch_timer.txt index ef5fbe9a77c7..ad440a2b8051 100644 --- a/Documentation/devicetree/bindings/arm/arch_timer.txt +++ b/Documentation/devicetree/bindings/arm/arch_timer.txt @@ -38,6 +38,11 @@ to deliver its interrupts via SPIs. architecturally-defined reset values. Only supported for 32-bit systems which follow the ARMv7 architected reset values. +- arm,no-tick-in-suspend : The main counter does not tick when the system is in + low-power system suspend on some SoCs. This behavior does not match the + Architecture Reference Manual's specification that the system counter "must + be implemented in an always-on power domain." + Example: diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt index 069fcb3eef6e..262722d8867b 100644 --- a/Documentation/kbuild/kconfig-language.txt +++ b/Documentation/kbuild/kconfig-language.txt @@ -113,6 +113,34 @@ applicable everywhere (see syntax). That will limit the usefulness but on the other hand avoid the illegal configurations all over. +- weak reverse dependencies: "imply" <symbol> ["if" <expr>] + This is similar to "select" as it enforces a lower limit on another + symbol except that the "implied" symbol's value may still be set to n + from a direct dependency or with a visible prompt. + + Given the following example: + + config FOO + tristate + imply BAZ + + config BAZ + tristate + depends on BAR + + The following values are possible: + + FOO BAR BAZ's default choice for BAZ + --- --- ------------- -------------- + n y n N/m/y + m y m M/y/n + y y y Y/n + y n * N + + This is useful e.g. with multiple drivers that want to indicate their + ability to hook into a secondary subsystem while allowing the user to + configure that subsystem out without also having to unset these drivers. + - limiting menu display: "visible if" <expr> This attribute is only applicable to menu blocks, if the condition is false, the menu block is not displayed to the user (the symbols @@ -481,6 +509,7 @@ historical issues resolved through these different solutions. b) Match dependency semantics: b1) Swap all "select FOO" to "depends on FOO" or, b2) Swap all "depends on FOO" to "select FOO" + c) Consider the use of "imply" instead of "select" The resolution to a) can be tested with the sample Kconfig file Documentation/kbuild/Kconfig.recursion-issue-01 through the removal diff --git a/Documentation/trace/ftrace.txt b/Documentation/trace/ftrace.txt index 185c39fea2a0..5596e2d71d6d 100644 --- a/Documentation/trace/ftrace.txt +++ b/Documentation/trace/ftrace.txt @@ -362,6 +362,26 @@ of ftrace. Here is a list of some of the key files: to correlate events across hypervisor/guest if tb_offset is known. + mono: This uses the fast monotonic clock (CLOCK_MONOTONIC) + which is monotonic and is subject to NTP rate adjustments. + + mono_raw: + This is the raw monotonic clock (CLOCK_MONOTONIC_RAW) + which is montonic but is not subject to any rate adjustments + and ticks at the same rate as the hardware clocksource. + + boot: This is the boot clock (CLOCK_BOOTTIME) and is based on the + fast monotonic clock, but also accounts for time spent in + suspend. Since the clock access is designed for use in + tracing in the suspend path, some side effects are possible + if clock is accessed after the suspend time is accounted before + the fast mono clock is updated. In this case, the clock update + appears to happen slightly sooner than it normally would have. + Also on 32-bit systems, it's possible that the 64-bit boot offset + sees a partial update. These effects are rare and post + processing should be able to handle them. See comments in the + ktime_get_boot_fast_ns() function for more information. + To set a clock, simply echo the clock name into this file. echo global > trace_clock diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c index ffb93f499c83..56e427c7aa3c 100644 --- a/arch/alpha/kernel/osf_sys.c +++ b/arch/alpha/kernel/osf_sys.c @@ -1029,11 +1029,16 @@ SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv, return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); } +asmlinkage long sys_ni_posix_timers(void); + SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it) { struct itimerval kit; int error; + if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) + return sys_ni_posix_timers(); + error = do_getitimer(which, &kit); if (!error && put_it32(it, &kit)) error = -EFAULT; @@ -1047,6 +1052,9 @@ SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in, struct itimerval kin, kout; int error; + if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) + return sys_ni_posix_timers(); + if (in) { if (get_it32(&kin, in)) return -EFAULT; diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi index 7afbfb0f96a3..1e24e455700b 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi @@ -174,6 +174,7 @@ <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW 0>, <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW 0>, <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW 0>; + arm,no-tick-in-suspend; }; xin24m: xin24m { diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c index 79c6311cd912..5b21cb7d84d6 100644 --- a/arch/x86/kernel/rtc.c +++ b/arch/x86/kernel/rtc.c @@ -64,6 +64,15 @@ void mach_get_cmos_time(struct timespec *now) unsigned int status, year, mon, day, hour, min, sec, century = 0; unsigned long flags; + /* + * If pm_trace abused the RTC as storage, set the timespec to 0, + * which tells the caller that this RTC value is unusable. + */ + if (!pm_trace_rtc_valid()) { + now->tv_sec = now->tv_nsec = 0; + return; + } + spin_lock_irqsave(&rtc_lock, flags); /* diff --git a/drivers/Makefile b/drivers/Makefile index 194d20bee7dc..060026a02f59 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -107,7 +107,7 @@ obj-$(CONFIG_INPUT) += input/ obj-$(CONFIG_RTC_LIB) += rtc/ obj-y += i2c/ media/ obj-$(CONFIG_PPS) += pps/ -obj-$(CONFIG_PTP_1588_CLOCK) += ptp/ +obj-y += ptp/ obj-$(CONFIG_W1) += w1/ obj-y += power/ obj-$(CONFIG_HWMON) += hwmon/ diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c index efec10b49d59..1cda505d6a85 100644 --- a/drivers/base/power/trace.c +++ b/drivers/base/power/trace.c @@ -10,6 +10,7 @@ #include <linux/pm-trace.h> #include <linux/export.h> #include <linux/rtc.h> +#include <linux/suspend.h> #include <linux/mc146818rtc.h> @@ -74,6 +75,9 @@ #define DEVSEED (7919) +bool pm_trace_rtc_abused __read_mostly; +EXPORT_SYMBOL_GPL(pm_trace_rtc_abused); + static unsigned int dev_hash_value; static int set_magic_time(unsigned int user, unsigned int file, unsigned int device) @@ -104,6 +108,7 @@ static int set_magic_time(unsigned int user, unsigned int file, unsigned int dev time.tm_min = (n % 20) * 3; n /= 20; mc146818_set_time(&time); + pm_trace_rtc_abused = true; return n ? -1 : 0; } @@ -239,9 +244,31 @@ int show_trace_dev_match(char *buf, size_t size) return ret; } +static int +pm_trace_notify(struct notifier_block *nb, unsigned long mode, void *_unused) +{ + switch (mode) { + case PM_POST_HIBERNATION: + case PM_POST_SUSPEND: + if (pm_trace_rtc_abused) { + pm_trace_rtc_abused = false; + pr_warn("Possible incorrect RTC due to pm_trace, please use 'ntpdate' or 'rdate' to reset it.\n"); + } + break; + default: + break; + } + return 0; +} + +static struct notifier_block pm_trace_nb = { + .notifier_call = pm_trace_notify, +}; + static int early_resume_init(void) { hash_value_early_read = read_magic_time(); + register_pm_notifier(&pm_trace_nb); return 0; } diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index dcc09739a54e..45ba878ae025 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -542,6 +542,7 @@ config HANGCHECK_TIMER config MMTIMER tristate "MMTIMER Memory mapped RTC for SGI Altix" depends on IA64_GENERIC || IA64_SGI_SN2 + depends on POSIX_TIMERS default y help The mmtimer device allows direct userspace access to the diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 73c487da6d2a..02fef6830e72 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -81,6 +81,7 @@ static struct clock_event_device __percpu *arch_timer_evt; static enum ppi_nr arch_timer_uses_ppi = VIRT_PPI; static bool arch_timer_c3stop; static bool arch_timer_mem_use_virtual; +static bool arch_counter_suspend_stop; static bool evtstrm_enable = IS_ENABLED(CONFIG_ARM_ARCH_TIMER_EVTSTREAM); @@ -576,7 +577,7 @@ static struct clocksource clocksource_counter = { .rating = 400, .read = arch_counter_read, .mask = CLOCKSOURCE_MASK(56), - .flags = CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; static struct cyclecounter cyclecounter = { @@ -616,6 +617,8 @@ static void __init arch_counter_register(unsigned type) arch_timer_read_counter = arch_counter_get_cntvct_mem; } + if (!arch_counter_suspend_stop) + clocksource_counter.flags |= CLOCK_SOURCE_SUSPEND_NONSTOP; start_count = arch_timer_read_counter(); clocksource_register_hz(&clocksource_counter, arch_timer_rate); cyclecounter.mult = clocksource_counter.mult; @@ -907,6 +910,10 @@ static int __init arch_timer_of_init(struct device_node *np) of_property_read_bool(np, "arm,cpu-registers-not-fw-configured")) arch_timer_uses_ppi = PHYS_SECURE_PPI; + /* On some systems, the counter stops ticking when in suspend. */ + arch_counter_suspend_stop = of_property_read_bool(np, + "arm,no-tick-in-suspend"); + return arch_timer_init(); } CLOCKSOURCE_OF_DECLARE(armv7_arch_timer, "arm,armv7-timer", arch_timer_of_init); @@ -964,8 +971,9 @@ static int __init arch_timer_mem_init(struct device_node *np) } ret= -ENXIO; - base = arch_counter_base = of_iomap(best_frame, 0); - if (!base) { + base = arch_counter_base = of_io_request_and_map(best_frame, 0, + "arch_mem_timer"); + if (IS_ERR(base)) { pr_err("arch_timer: Can't map frame's registers\n"); goto out; } diff --git a/drivers/clocksource/bcm2835_timer.c b/drivers/clocksource/bcm2835_timer.c index e71acf231c89..f2f29d2be1cf 100644 --- a/drivers/clocksource/bcm2835_timer.c +++ b/drivers/clocksource/bcm2835_timer.c @@ -96,7 +96,7 @@ static int __init bcm2835_timer_init(struct device_node *node) ret = of_property_read_u32(node, "clock-frequency", &freq); if (ret) { pr_err("Can't read clock-frequency"); - return ret; + goto err_iounmap; } system_clock = base + REG_COUNTER_LO; @@ -108,13 +108,15 @@ static int __init bcm2835_timer_init(struct device_node *node) irq = irq_of_parse_and_map(node, DEFAULT_TIMER); if (irq <= 0) { pr_err("Can't parse IRQ"); - return -EINVAL; + ret = -EINVAL; + goto err_iounmap; } timer = kzalloc(sizeof(*timer), GFP_KERNEL); if (!timer) { pr_err("Can't allocate timer struct\n"); - return -ENOMEM; + ret = -ENOMEM; + goto err_iounmap; } timer->control = base + REG_CONTROL; @@ -133,7 +135,7 @@ static int __init bcm2835_timer_init(struct device_node *node) ret = setup_irq(irq, &timer->act); if (ret) { pr_err("Can't set up timer IRQ\n"); - return ret; + goto err_iounmap; } clockevents_config_and_register(&timer->evt, freq, 0xf, 0xffffffff); @@ -141,6 +143,10 @@ static int __init bcm2835_timer_init(struct device_node *node) pr_info("bcm2835: system timer (irq = %d)\n", irq); return 0; + +err_iounmap: + iounmap(base); + return ret; } CLOCKSOURCE_OF_DECLARE(bcm2835, "brcm,bcm2835-system-timer", bcm2835_timer_init); diff --git a/drivers/net/ethernet/adi/Kconfig b/drivers/net/ethernet/adi/Kconfig index 6b94ba610399..98cc8f535021 100644 --- a/drivers/net/ethernet/adi/Kconfig +++ b/drivers/net/ethernet/adi/Kconfig @@ -58,7 +58,7 @@ config BFIN_RX_DESC_NUM config BFIN_MAC_USE_HWSTAMP bool "Use IEEE 1588 hwstamp" depends on BFIN_MAC && BF518 - select PTP_1588_CLOCK + imply PTP_1588_CLOCK default y ---help--- To support the IEEE 1588 Precision Time Protocol (PTP), select y here diff --git a/drivers/net/ethernet/amd/Kconfig b/drivers/net/ethernet/amd/Kconfig index 7ab6efbe4189..d5c15e8bb3de 100644 --- a/drivers/net/ethernet/amd/Kconfig +++ b/drivers/net/ethernet/amd/Kconfig @@ -177,9 +177,9 @@ config AMD_XGBE depends on X86 || ARM64 || COMPILE_TEST select BITREVERSE select CRC32 - select PTP_1588_CLOCK select PHYLIB select AMD_XGBE_HAVE_ECC if X86 + imply PTP_1588_CLOCK ---help--- This driver supports the AMD 10GbE Ethernet device found on an AMD SoC. diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c index b87a89988ffd..17ac8f9a51a0 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c @@ -422,7 +422,8 @@ int xgbe_config_netdev(struct xgbe_prv_data *pdata) goto err_wq; } - xgbe_ptp_register(pdata); + if (IS_REACHABLE(CONFIG_PTP_1588_CLOCK)) + xgbe_ptp_register(pdata); xgbe_debugfs_init(pdata); @@ -448,7 +449,8 @@ void xgbe_deconfig_netdev(struct xgbe_prv_data *pdata) xgbe_debugfs_exit(pdata); - xgbe_ptp_unregister(pdata); + if (IS_REACHABLE(CONFIG_PTP_1588_CLOCK)) + xgbe_ptp_unregister(pdata); pdata->phy_if.phy_exit(pdata); diff --git a/drivers/net/ethernet/broadcom/Kconfig b/drivers/net/ethernet/broadcom/Kconfig index 404c020cb82e..940fb24bba21 100644 --- a/drivers/net/ethernet/broadcom/Kconfig +++ b/drivers/net/ethernet/broadcom/Kconfig @@ -110,7 +110,7 @@ config TIGON3 depends on PCI select PHYLIB select HWMON - select PTP_1588_CLOCK + imply PTP_1588_CLOCK ---help--- This driver supports Broadcom Tigon3 based gigabit Ethernet cards. @@ -120,7 +120,7 @@ config TIGON3 config BNX2X tristate "Broadcom NetXtremeII 10Gb support" depends on PCI - select PTP_1588_CLOCK + imply PTP_1588_CLOCK select FW_LOADER select ZLIB_INFLATE select LIBCRC32C diff --git a/drivers/net/ethernet/cavium/Kconfig b/drivers/net/ethernet/cavium/Kconfig index c0679c21638a..bbc8bd16cb97 100644 --- a/drivers/net/ethernet/cavium/Kconfig +++ b/drivers/net/ethernet/cavium/Kconfig @@ -53,7 +53,7 @@ config THUNDER_NIC_RGX config LIQUIDIO tristate "Cavium LiquidIO support" depends on 64BIT - select PTP_1588_CLOCK + imply PTP_1588_CLOCK select FW_LOADER select LIBCRC32C ---help--- diff --git a/drivers/net/ethernet/freescale/Kconfig b/drivers/net/ethernet/freescale/Kconfig index 0d415516b577..6e490fd2345d 100644 --- a/drivers/net/ethernet/freescale/Kconfig +++ b/drivers/net/ethernet/freescale/Kconfig @@ -25,7 +25,7 @@ config FEC ARCH_MXC || SOC_IMX28) default ARCH_MXC || SOC_IMX28 if ARM select PHYLIB - select PTP_1588_CLOCK + imply PTP_1588_CLOCK ---help--- Say Y here if you want to use the built-in 10/100 Fast ethernet controller on some Motorola ColdFire and Freescale i.MX processors. diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig index c0e17433f623..1349b45f014d 100644 --- a/drivers/net/ethernet/intel/Kconfig +++ b/drivers/net/ethernet/intel/Kconfig @@ -58,7 +58,7 @@ config E1000E tristate "Intel(R) PRO/1000 PCI-Express Gigabit Ethernet support" depends on PCI && (!SPARC32 || BROKEN) select CRC32 - select PTP_1588_CLOCK + imply PTP_1588_CLOCK ---help--- This driver supports the PCI-Express Intel(R) PRO/1000 gigabit ethernet family of adapters. For PCI or PCI-X e1000 adapters, @@ -83,7 +83,7 @@ config E1000E_HWTS config IGB tristate "Intel(R) 82575/82576 PCI-Express Gigabit Ethernet support" depends on PCI - select PTP_1588_CLOCK + imply PTP_1588_CLOCK select I2C select I2C_ALGOBIT ---help--- @@ -156,7 +156,7 @@ config IXGBE tristate "Intel(R) 10GbE PCI Express adapters support" depends on PCI select MDIO - select PTP_1588_CLOCK + imply PTP_1588_CLOCK ---help--- This driver supports Intel(R) 10GbE PCI Express family of adapters. For more information on how to identify your adapter, go @@ -213,7 +213,7 @@ config IXGBEVF config I40E tristate "Intel(R) Ethernet Controller XL710 Family support" - select PTP_1588_CLOCK + imply PTP_1588_CLOCK depends on PCI ---help--- This driver supports Intel(R) Ethernet Controller XL710 Family of @@ -264,7 +264,7 @@ config FM10K tristate "Intel(R) FM10000 Ethernet Switch Host Interface Support" default n depends on PCI_MSI - select PTP_1588_CLOCK + imply PTP_1588_CLOCK ---help--- This driver supports Intel(R) FM10000 Ethernet Switch Host Interface. For more information on how to identify your adapter, diff --git a/drivers/net/ethernet/mellanox/mlx4/Kconfig b/drivers/net/ethernet/mellanox/mlx4/Kconfig index 5098e7f21987..22b1cc012bc9 100644 --- a/drivers/net/ethernet/mellanox/mlx4/Kconfig +++ b/drivers/net/ethernet/mellanox/mlx4/Kconfig @@ -7,7 +7,7 @@ config MLX4_EN depends on MAY_USE_DEVLINK depends on PCI select MLX4_CORE - select PTP_1588_CLOCK + imply PTP_1588_CLOCK ---help--- This driver supports Mellanox Technologies ConnectX Ethernet devices. diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig index 521cfdb7d11e..ddb4ca4ff930 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig +++ b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig @@ -14,7 +14,7 @@ config MLX5_CORE config MLX5_CORE_EN bool "Mellanox Technologies ConnectX-4 Ethernet support" depends on NETDEVICES && ETHERNET && PCI && MLX5_CORE - select PTP_1588_CLOCK + imply PTP_1588_CLOCK default n ---help--- Ethernet support in Mellanox Technologies ConnectX-4 NIC. diff --git a/drivers/net/ethernet/renesas/Kconfig b/drivers/net/ethernet/renesas/Kconfig index 85ec447c2d18..27be51f0a421 100644 --- a/drivers/net/ethernet/renesas/Kconfig +++ b/drivers/net/ethernet/renesas/Kconfig @@ -37,7 +37,7 @@ config RAVB select MII select MDIO_BITBANG select PHYLIB - select PTP_1588_CLOCK + imply PTP_1588_CLOCK help Renesas Ethernet AVB device driver. This driver supports the following SoCs: diff --git a/drivers/net/ethernet/samsung/Kconfig b/drivers/net/ethernet/samsung/Kconfig index 2360d8150777..fbd5e06654c6 100644 --- a/drivers/net/ethernet/samsung/Kconfig +++ b/drivers/net/ethernet/samsung/Kconfig @@ -21,7 +21,7 @@ config SXGBE_ETH depends on HAS_IOMEM && HAS_DMA select PHYLIB |