* [PATCH v2 0/2] riscv: Add context tracker suppor
@ 2020-06-24 9:03 Greentime Hu
2020-06-24 9:03 ` [PATCH v2 1/2] riscv: Support irq_work via self IPIs Greentime Hu
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Greentime Hu @ 2020-06-24 9:03 UTC (permalink / raw)
To: greentime.hu, linux-riscv, linux-kernel, aou, palmer,
paul.walmsley, guoren
This patchset adds support for irq_work via self IPI and context tracking.
It is tested in qemu-system-riscv64 and SiFive HiFive Unleashed board based
on v5.8-rc2.
---
Changes in v2
- Fix the compiling warning
Greentime Hu (2):
riscv: Support irq_work via self IPIs
riscv: Enable context tracking
arch/riscv/Kconfig | 1 +
arch/riscv/include/asm/irq_work.h | 10 ++++++++++
arch/riscv/kernel/entry.S | 23 +++++++++++++++++++++++
arch/riscv/kernel/smp.c | 15 +++++++++++++++
4 files changed, 49 insertions(+)
create mode 100644 arch/riscv/include/asm/irq_work.h
--
2.27.0
^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH v2 1/2] riscv: Support irq_work via self IPIs 2020-06-24 9:03 [PATCH v2 0/2] riscv: Add context tracker suppor Greentime Hu @ 2020-06-24 9:03 ` Greentime Hu 2020-06-24 9:03 ` [PATCH v2 2/2] riscv: Enable context tracking Greentime Hu 2020-07-10 17:30 ` [PATCH v2 0/2] riscv: Add context tracker suppor Palmer Dabbelt 2 siblings, 0 replies; 6+ messages in thread From: Greentime Hu @ 2020-06-24 9:03 UTC (permalink / raw) To: greentime.hu, linux-riscv, linux-kernel, aou, palmer, paul.walmsley, guoren Support for arch_irq_work_raise() and arch_irq_work_has_interrupt() was missing from riscv (a prerequisite for FULL_NOHZ). Signed-off-by: Greentime Hu <greentime.hu@sifive.com> --- arch/riscv/include/asm/irq_work.h | 10 ++++++++++ arch/riscv/kernel/smp.c | 15 +++++++++++++++ 2 files changed, 25 insertions(+) create mode 100644 arch/riscv/include/asm/irq_work.h diff --git a/arch/riscv/include/asm/irq_work.h b/arch/riscv/include/asm/irq_work.h new file mode 100644 index 000000000000..d6c277992f76 --- /dev/null +++ b/arch/riscv/include/asm/irq_work.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_RISCV_IRQ_WORK_H +#define _ASM_RISCV_IRQ_WORK_H + +static inline bool arch_irq_work_has_interrupt(void) +{ + return true; +} +extern void arch_irq_work_raise(void); +#endif /* _ASM_RISCV_IRQ_WORK_H */ diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c index b1d4f452f843..554b0fb47060 100644 --- a/arch/riscv/kernel/smp.c +++ b/arch/riscv/kernel/smp.c @@ -16,6 +16,7 @@ #include <linux/sched.h> #include <linux/seq_file.h> #include <linux/delay.h> +#include <linux/irq_work.h> #include <asm/clint.h> #include <asm/sbi.h> @@ -26,6 +27,7 @@ enum ipi_message_type { IPI_RESCHEDULE, IPI_CALL_FUNC, IPI_CPU_STOP, + IPI_IRQ_WORK, IPI_MAX }; @@ -123,6 +125,13 @@ static inline void clear_ipi(void) clint_clear_ipi(cpuid_to_hartid_map(smp_processor_id())); } +#ifdef CONFIG_IRQ_WORK +void arch_irq_work_raise(void) +{ + send_ipi_single(smp_processor_id(), IPI_IRQ_WORK); +} +#endif + void handle_IPI(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); @@ -158,6 +167,11 @@ void handle_IPI(struct pt_regs *regs) ipi_stop(); } + if (ops & (1 << IPI_IRQ_WORK)) { + stats[IPI_IRQ_WORK]++; + irq_work_run(); + } + BUG_ON((ops >> IPI_MAX) != 0); /* Order data access and bit testing. */ @@ -173,6 +187,7 @@ static const char * const ipi_names[] = { [IPI_RESCHEDULE] = "Rescheduling interrupts", [IPI_CALL_FUNC] = "Function call interrupts", [IPI_CPU_STOP] = "CPU stop interrupts", + [IPI_IRQ_WORK] = "IRQ work interrupts", }; void show_ipi_stats(struct seq_file *p, int prec) -- 2.27.0 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH v2 2/2] riscv: Enable context tracking 2020-06-24 9:03 [PATCH v2 0/2] riscv: Add context tracker suppor Greentime Hu 2020-06-24 9:03 ` [PATCH v2 1/2] riscv: Support irq_work via self IPIs Greentime Hu @ 2020-06-24 9:03 ` Greentime Hu 2020-07-10 17:30 ` Palmer Dabbelt 2020-07-10 17:30 ` [PATCH v2 0/2] riscv: Add context tracker suppor Palmer Dabbelt 2 siblings, 1 reply; 6+ messages in thread From: Greentime Hu @ 2020-06-24 9:03 UTC (permalink / raw) To: greentime.hu, linux-riscv, linux-kernel, aou, palmer, paul.walmsley, guoren This patch implements and enables context tracking for riscv (which is a prerequisite for CONFIG_NO_HZ_FULL support) It adds checking for previous state in the entry that all excepttions and interrupts goes to and calls context_tracking_user_exit() if it comes from user space. It also calls context_tracking_user_enter() if it will return to user space before restore_all. This patch is tested with the dynticks-testing testcase in qemu-system-riscv64 virt machine and Unleashed board. git://git.kernel.org/pub/scm/linux/kernel/git/frederic/dynticks-testing.git We can see the log here. The tick got mostly stopped during the execution of the user loop. _-----=> irqs-off / _----=> need-resched | / _---=> hardirq/softirq || / _--=> preempt-depth ||| / delay TASK-PID CPU# |||| TIMESTAMP FUNCTION | | | |||| | | <idle>-0 [001] d..2 604.183512: sched_switch: prev_comm=swapper/1 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=taskset next_pid=273 next_prio=120 user_loop-273 [001] d.h1 604.184788: hrtimer_expire_entry: hrtimer=000000002eda5fab function=tick_sched_timer now=604176096300 user_loop-273 [001] d.s2 604.184897: workqueue_queue_work: work struct=00000000383402c2 function=vmstat_update workqueue=00000000f36d35d4 req_cpu=1 cpu=1 user_loop-273 [001] dns2 604.185039: tick_stop: success=0 dependency=SCHED user_loop-273 [001] dn.1 604.185103: tick_stop: success=0 dependency=SCHED user_loop-273 [001] d..2 604.185154: sched_switch: prev_comm=taskset prev_pid=273 prev_prio=120 prev_state=R+ ==> next_comm=kworker/1:1 next_pid=46 next_prio=120 <...>-46 [001] .... 604.185194: workqueue_execute_start: work struct 00000000383402c2: function vmstat_update <...>-46 [001] d..2 604.185266: sched_switch: prev_comm=kworker/1:1 prev_pid=46 prev_prio=120 prev_state=I ==> next_comm=taskset next_pid=273 next_prio=120 user_loop-273 [001] d.h1 604.188812: hrtimer_expire_entry: hrtimer=000000002eda5fab function=tick_sched_timer now=604180133400 user_loop-273 [001] d..1 604.189050: tick_stop: success=1 dependency=NONE user_loop-273 [001] d..2 614.251386: sched_switch: prev_comm=user_loop prev_pid=273 prev_prio=120 prev_state=X ==> next_comm=swapper/1 next_pid=0 next_prio=120 <idle>-0 [001] d..2 614.315391: sched_switch: prev_comm=swapper/1 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=taskset next_pid=276 next_prio=120 Signed-off-by: Greentime Hu <greentime.hu@sifive.com> --- arch/riscv/Kconfig | 1 + arch/riscv/kernel/entry.S | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 128192e14ff2..17520e11815b 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -52,6 +52,7 @@ config RISCV select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_TRACEHOOK select HAVE_ASM_MODVERSIONS + select HAVE_CONTEXT_TRACKING select HAVE_COPY_THREAD_TLS select HAVE_DMA_CONTIGUOUS if MMU select HAVE_EBPF_JIT if MMU diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S index cae7e6d4c7ef..6ed579fc1073 100644 --- a/arch/riscv/kernel/entry.S +++ b/arch/riscv/kernel/entry.S @@ -97,6 +97,14 @@ _save_context: la gp, __global_pointer$ .option pop +#ifdef CONFIG_CONTEXT_TRACKING + /* If previous state is in user mode, call context_tracking_user_exit. */ + andi a0, s1, SR_SPP + bnez a0, skip_context_tracking + call context_tracking_user_exit + +skip_context_tracking: +#endif la ra, ret_from_exception /* * MSB of cause differentiates between @@ -137,6 +145,17 @@ _save_context: tail do_trap_unknown handle_syscall: +#ifdef CONFIG_CONTEXT_TRACKING + /* Recover a0 - a7 for system calls */ + REG_L x10, PT_A0(sp) + REG_L x11, PT_A1(sp) + REG_L x12, PT_A2(sp) + REG_L x13, PT_A3(sp) + REG_L x14, PT_A4(sp) + REG_L x15, PT_A5(sp) + REG_L x16, PT_A6(sp) + REG_L x17, PT_A7(sp) +#endif /* save the initial A0 value (needed in signal handlers) */ REG_S a0, PT_ORIG_A0(sp) /* @@ -205,6 +224,10 @@ resume_userspace: andi s1, s0, _TIF_WORK_MASK bnez s1, work_pending +#ifdef CONFIG_CONTEXT_TRACKING + call context_tracking_user_enter +#endif + /* Save unwound kernel stack pointer in thread_info */ addi s0, sp, PT_SIZE_ON_STACK REG_S s0, TASK_TI_KERNEL_SP(tp) -- 2.27.0 ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v2 2/2] riscv: Enable context tracking 2020-06-24 9:03 ` [PATCH v2 2/2] riscv: Enable context tracking Greentime Hu @ 2020-07-10 17:30 ` Palmer Dabbelt 2020-07-11 1:47 ` Greentime Hu 0 siblings, 1 reply; 6+ messages in thread From: Palmer Dabbelt @ 2020-07-10 17:30 UTC (permalink / raw) To: greentime.hu Cc: greentime.hu, linux-riscv, linux-kernel, aou, Paul Walmsley, guoren On Wed, 24 Jun 2020 02:03:16 PDT (-0700), greentime.hu@sifive.com wrote: > This patch implements and enables context tracking for riscv (which is a > prerequisite for CONFIG_NO_HZ_FULL support) > > It adds checking for previous state in the entry that all excepttions and > interrupts goes to and calls context_tracking_user_exit() if it comes from > user space. It also calls context_tracking_user_enter() if it will return > to user space before restore_all. > > This patch is tested with the dynticks-testing testcase in > qemu-system-riscv64 virt machine and Unleashed board. > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/dynticks-testing.git > > We can see the log here. The tick got mostly stopped during the execution > of the user loop. > > _-----=> irqs-off > / _----=> need-resched > | / _---=> hardirq/softirq > || / _--=> preempt-depth > ||| / delay > TASK-PID CPU# |||| TIMESTAMP FUNCTION > | | | |||| | | > <idle>-0 [001] d..2 604.183512: sched_switch: prev_comm=swapper/1 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=taskset next_pid=273 next_prio=120 > user_loop-273 [001] d.h1 604.184788: hrtimer_expire_entry: hrtimer=000000002eda5fab function=tick_sched_timer now=604176096300 > user_loop-273 [001] d.s2 604.184897: workqueue_queue_work: work struct=00000000383402c2 function=vmstat_update workqueue=00000000f36d35d4 req_cpu=1 cpu=1 > user_loop-273 [001] dns2 604.185039: tick_stop: success=0 dependency=SCHED > user_loop-273 [001] dn.1 604.185103: tick_stop: success=0 dependency=SCHED > user_loop-273 [001] d..2 604.185154: sched_switch: prev_comm=taskset prev_pid=273 prev_prio=120 prev_state=R+ ==> next_comm=kworker/1:1 next_pid=46 next_prio=120 > <...>-46 [001] .... 604.185194: workqueue_execute_start: work struct 00000000383402c2: function vmstat_update > <...>-46 [001] d..2 604.185266: sched_switch: prev_comm=kworker/1:1 prev_pid=46 prev_prio=120 prev_state=I ==> next_comm=taskset next_pid=273 next_prio=120 > user_loop-273 [001] d.h1 604.188812: hrtimer_expire_entry: hrtimer=000000002eda5fab function=tick_sched_timer now=604180133400 > user_loop-273 [001] d..1 604.189050: tick_stop: success=1 dependency=NONE > user_loop-273 [001] d..2 614.251386: sched_switch: prev_comm=user_loop prev_pid=273 prev_prio=120 prev_state=X ==> next_comm=swapper/1 next_pid=0 next_prio=120 > <idle>-0 [001] d..2 614.315391: sched_switch: prev_comm=swapper/1 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=taskset next_pid=276 next_prio=120 > > Signed-off-by: Greentime Hu <greentime.hu@sifive.com> > --- > arch/riscv/Kconfig | 1 + > arch/riscv/kernel/entry.S | 23 +++++++++++++++++++++++ > 2 files changed, 24 insertions(+) > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > index 128192e14ff2..17520e11815b 100644 > --- a/arch/riscv/Kconfig > +++ b/arch/riscv/Kconfig > @@ -52,6 +52,7 @@ config RISCV > select HAVE_ARCH_SECCOMP_FILTER > select HAVE_ARCH_TRACEHOOK > select HAVE_ASM_MODVERSIONS > + select HAVE_CONTEXT_TRACKING > select HAVE_COPY_THREAD_TLS > select HAVE_DMA_CONTIGUOUS if MMU > select HAVE_EBPF_JIT if MMU > diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S > index cae7e6d4c7ef..6ed579fc1073 100644 > --- a/arch/riscv/kernel/entry.S > +++ b/arch/riscv/kernel/entry.S > @@ -97,6 +97,14 @@ _save_context: > la gp, __global_pointer$ > .option pop > > +#ifdef CONFIG_CONTEXT_TRACKING > + /* If previous state is in user mode, call context_tracking_user_exit. */ > + andi a0, s1, SR_SPP I've changed that to SR_PP, as I don't see any reason why this should depend on MMU. I think this is correct: we're using scratch==0 elsewhere to detect recursive traps, but we've blown that away by this point so it's not an option. I don't know of any reason why PP wouldn't be accurate. > + bnez a0, skip_context_tracking > + call context_tracking_user_exit > + > +skip_context_tracking: > +#endif > la ra, ret_from_exception > /* > * MSB of cause differentiates between > @@ -137,6 +145,17 @@ _save_context: > tail do_trap_unknown > > handle_syscall: > +#ifdef CONFIG_CONTEXT_TRACKING > + /* Recover a0 - a7 for system calls */ > + REG_L x10, PT_A0(sp) > + REG_L x11, PT_A1(sp) > + REG_L x12, PT_A2(sp) > + REG_L x13, PT_A3(sp) > + REG_L x14, PT_A4(sp) > + REG_L x15, PT_A5(sp) > + REG_L x16, PT_A6(sp) > + REG_L x17, PT_A7(sp) > +#endif > /* save the initial A0 value (needed in signal handlers) */ > REG_S a0, PT_ORIG_A0(sp) > /* > @@ -205,6 +224,10 @@ resume_userspace: > andi s1, s0, _TIF_WORK_MASK > bnez s1, work_pending > > +#ifdef CONFIG_CONTEXT_TRACKING > + call context_tracking_user_enter > +#endif > + > /* Save unwound kernel stack pointer in thread_info */ > addi s0, sp, PT_SIZE_ON_STACK > REG_S s0, TASK_TI_KERNEL_SP(tp) ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v2 2/2] riscv: Enable context tracking 2020-07-10 17:30 ` Palmer Dabbelt @ 2020-07-11 1:47 ` Greentime Hu 0 siblings, 0 replies; 6+ messages in thread From: Greentime Hu @ 2020-07-11 1:47 UTC (permalink / raw) To: Palmer Dabbelt Cc: linux-riscv, Linux Kernel Mailing List, Albert Ou, Paul Walmsley, Guo Ren Palmer Dabbelt <palmer@dabbelt.com> 於 2020年7月11日 週六 上午1:30寫道： > > On Wed, 24 Jun 2020 02:03:16 PDT (-0700), greentime.hu@sifive.com wrote: > > This patch implements and enables context tracking for riscv (which is a > > prerequisite for CONFIG_NO_HZ_FULL support) > > > > It adds checking for previous state in the entry that all excepttions and > > interrupts goes to and calls context_tracking_user_exit() if it comes from > > user space. It also calls context_tracking_user_enter() if it will return > > to user space before restore_all. > > > > This patch is tested with the dynticks-testing testcase in > > qemu-system-riscv64 virt machine and Unleashed board. > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/dynticks-testing.git > > > > We can see the log here. The tick got mostly stopped during the execution > > of the user loop. > > > > _-----=> irqs-off > > / _----=> need-resched > > | / _---=> hardirq/softirq > > || / _--=> preempt-depth > > ||| / delay > > TASK-PID CPU# |||| TIMESTAMP FUNCTION > > | | | |||| | | > > <idle>-0 [001] d..2 604.183512: sched_switch: prev_comm=swapper/1 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=taskset next_pid=273 next_prio=120 > > user_loop-273 [001] d.h1 604.184788: hrtimer_expire_entry: hrtimer=000000002eda5fab function=tick_sched_timer now=604176096300 > > user_loop-273 [001] d.s2 604.184897: workqueue_queue_work: work struct=00000000383402c2 function=vmstat_update workqueue=00000000f36d35d4 req_cpu=1 cpu=1 > > user_loop-273 [001] dns2 604.185039: tick_stop: success=0 dependency=SCHED > > user_loop-273 [001] dn.1 604.185103: tick_stop: success=0 dependency=SCHED > > user_loop-273 [001] d..2 604.185154: sched_switch: prev_comm=taskset prev_pid=273 prev_prio=120 prev_state=R+ ==> next_comm=kworker/1:1 next_pid=46 next_prio=120 > > <...>-46 [001] .... 604.185194: workqueue_execute_start: work struct 00000000383402c2: function vmstat_update > > <...>-46 [001] d..2 604.185266: sched_switch: prev_comm=kworker/1:1 prev_pid=46 prev_prio=120 prev_state=I ==> next_comm=taskset next_pid=273 next_prio=120 > > user_loop-273 [001] d.h1 604.188812: hrtimer_expire_entry: hrtimer=000000002eda5fab function=tick_sched_timer now=604180133400 > > user_loop-273 [001] d..1 604.189050: tick_stop: success=1 dependency=NONE > > user_loop-273 [001] d..2 614.251386: sched_switch: prev_comm=user_loop prev_pid=273 prev_prio=120 prev_state=X ==> next_comm=swapper/1 next_pid=0 next_prio=120 > > <idle>-0 [001] d..2 614.315391: sched_switch: prev_comm=swapper/1 prev_pid=0 prev_prio=120 prev_state=R ==> next_comm=taskset next_pid=276 next_prio=120 > > > > Signed-off-by: Greentime Hu <greentime.hu@sifive.com> > > --- > > arch/riscv/Kconfig | 1 + > > arch/riscv/kernel/entry.S | 23 +++++++++++++++++++++++ > > 2 files changed, 24 insertions(+) > > > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > > index 128192e14ff2..17520e11815b 100644 > > --- a/arch/riscv/Kconfig > > +++ b/arch/riscv/Kconfig > > @@ -52,6 +52,7 @@ config RISCV > > select HAVE_ARCH_SECCOMP_FILTER > > select HAVE_ARCH_TRACEHOOK > > select HAVE_ASM_MODVERSIONS > > + select HAVE_CONTEXT_TRACKING > > select HAVE_COPY_THREAD_TLS > > select HAVE_DMA_CONTIGUOUS if MMU > > select HAVE_EBPF_JIT if MMU > > diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S > > index cae7e6d4c7ef..6ed579fc1073 100644 > > --- a/arch/riscv/kernel/entry.S > > +++ b/arch/riscv/kernel/entry.S > > @@ -97,6 +97,14 @@ _save_context: > > la gp, __global_pointer$ > > .option pop > > > > +#ifdef CONFIG_CONTEXT_TRACKING > > + /* If previous state is in user mode, call context_tracking_user_exit. */ > > + andi a0, s1, SR_SPP > > I've changed that to SR_PP, as I don't see any reason why this should depend on > MMU. > > I think this is correct: we're using scratch==0 elsewhere to detect recursive > traps, but we've blown that away by this point so it's not an option. I don't > know of any reason why PP wouldn't be accurate. Hi Palmer, Thank you. That makes sense to me. > > > + bnez a0, skip_context_tracking > > + call context_tracking_user_exit > > + > > +skip_context_tracking: > > +#endif > > la ra, ret_from_exception > > /* > > * MSB of cause differentiates between > > @@ -137,6 +145,17 @@ _save_context: > > tail do_trap_unknown > > > > handle_syscall: > > +#ifdef CONFIG_CONTEXT_TRACKING > > + /* Recover a0 - a7 for system calls */ > > + REG_L x10, PT_A0(sp) > > + REG_L x11, PT_A1(sp) > > + REG_L x12, PT_A2(sp) > > + REG_L x13, PT_A3(sp) > > + REG_L x14, PT_A4(sp) > > + REG_L x15, PT_A5(sp) > > + REG_L x16, PT_A6(sp) > > + REG_L x17, PT_A7(sp) > > +#endif > > /* save the initial A0 value (needed in signal handlers) */ > > REG_S a0, PT_ORIG_A0(sp) > > /* > > @@ -205,6 +224,10 @@ resume_userspace: > > andi s1, s0, _TIF_WORK_MASK > > bnez s1, work_pending > > > > +#ifdef CONFIG_CONTEXT_TRACKING > > + call context_tracking_user_enter > > +#endif > > + > > /* Save unwound kernel stack pointer in thread_info */ > > addi s0, sp, PT_SIZE_ON_STACK > > REG_S s0, TASK_TI_KERNEL_SP(tp) ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v2 0/2] riscv: Add context tracker suppor 2020-06-24 9:03 [PATCH v2 0/2] riscv: Add context tracker suppor Greentime Hu 2020-06-24 9:03 ` [PATCH v2 1/2] riscv: Support irq_work via self IPIs Greentime Hu 2020-06-24 9:03 ` [PATCH v2 2/2] riscv: Enable context tracking Greentime Hu @ 2020-07-10 17:30 ` Palmer Dabbelt 2 siblings, 0 replies; 6+ messages in thread From: Palmer Dabbelt @ 2020-07-10 17:30 UTC (permalink / raw) To: greentime.hu Cc: greentime.hu, linux-riscv, linux-kernel, aou, Paul Walmsley, guoren On Wed, 24 Jun 2020 02:03:14 PDT (-0700), greentime.hu@sifive.com wrote: > This patchset adds support for irq_work via self IPI and context tracking. > It is tested in qemu-system-riscv64 and SiFive HiFive Unleashed board based > on v5.8-rc2. > > --- > Changes in v2 > - Fix the compiling warning > > Greentime Hu (2): > riscv: Support irq_work via self IPIs > riscv: Enable context tracking > > arch/riscv/Kconfig | 1 + > arch/riscv/include/asm/irq_work.h | 10 ++++++++++ > arch/riscv/kernel/entry.S | 23 +++++++++++++++++++++++ > arch/riscv/kernel/smp.c | 15 +++++++++++++++ > 4 files changed, 49 insertions(+) > create mode 100644 arch/riscv/include/asm/irq_work.h These are on for-next, with some merge conflicts fixed up. Thanks! ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-07-11 1:47 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-06-24 9:03 [PATCH v2 0/2] riscv: Add context tracker suppor Greentime Hu 2020-06-24 9:03 ` [PATCH v2 1/2] riscv: Support irq_work via self IPIs Greentime Hu 2020-06-24 9:03 ` [PATCH v2 2/2] riscv: Enable context tracking Greentime Hu 2020-07-10 17:30 ` Palmer Dabbelt 2020-07-11 1:47 ` Greentime Hu 2020-07-10 17:30 ` [PATCH v2 0/2] riscv: Add context tracker suppor Palmer Dabbelt
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