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| author | Christoph Hellwig <hch@lst.de> | 2019-10-28 13:10:32 +0100 |
|---|---|---|
| committer | Paul Walmsley <paul.walmsley@sifive.com> | 2019-11-05 09:20:42 -0800 |
| commit | a4c3733d32a72f11dee86d0731d7565aa6ebe22d (patch) | |
| tree | 45a8cdbf56325f37ad1b04c015aa8f9a5c646e9a /arch/riscv/kernel/signal.c | |
| parent | 0c3ac28931d578324e93afab6ee7b740dfdaff6f (diff) | |
| download | linux-a4c3733d32a72f11dee86d0731d7565aa6ebe22d.tar.gz linux-a4c3733d32a72f11dee86d0731d7565aa6ebe22d.tar.bz2 linux-a4c3733d32a72f11dee86d0731d7565aa6ebe22d.zip | |
riscv: abstract out CSR names for supervisor vs machine mode
Many of the privileged CSRs exist in a supervisor and machine version
that are used very similarly. Provide versions of the CSR names and
fields that map to either the S-mode or M-mode variant depending on
a new CONFIG_RISCV_M_MODE kconfig symbol.
Contains contributions from Damien Le Moal <Damien.LeMoal@wdc.com>
and Paul Walmsley <paul.walmsley@sifive.com>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de> # for drivers/clocksource, drivers/irqchip
[paul.walmsley@sifive.com: updated to apply]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Diffstat (limited to 'arch/riscv/kernel/signal.c')
| -rw-r--r-- | arch/riscv/kernel/signal.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c index d0f6f212f5df..b7f9a5565c4b 100644 --- a/arch/riscv/kernel/signal.c +++ b/arch/riscv/kernel/signal.c @@ -124,7 +124,7 @@ badframe: pr_info_ratelimited( "%s[%d]: bad frame in %s: frame=%p pc=%p sp=%p\n", task->comm, task_pid_nr(task), __func__, - frame, (void *)regs->sepc, (void *)regs->sp); + frame, (void *)regs->epc, (void *)regs->sp); } force_sig(SIGSEGV); return 0; @@ -199,7 +199,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, * We always pass siginfo and mcontext, regardless of SA_SIGINFO, * since some things rely on this (e.g. glibc's debug/segfault.c). */ - regs->sepc = (unsigned long)ksig->ka.sa.sa_handler; + regs->epc = (unsigned long)ksig->ka.sa.sa_handler; regs->sp = (unsigned long)frame; regs->a0 = ksig->sig; /* a0: signal number */ regs->a1 = (unsigned long)(&frame->info); /* a1: siginfo pointer */ @@ -208,7 +208,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, #if DEBUG_SIG pr_info("SIG deliver (%s:%d): sig=%d pc=%p ra=%p sp=%p\n", current->comm, task_pid_nr(current), ksig->sig, - (void *)regs->sepc, (void *)regs->ra, frame); + (void *)regs->epc, (void *)regs->ra, frame); #endif return 0; @@ -220,10 +220,9 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs) int ret; /* Are we from a system call? */ - if (regs->scause == EXC_SYSCALL) { + if (regs->cause == EXC_SYSCALL) { /* Avoid additional syscall restarting via ret_from_exception */ - regs->scause = -1UL; - + regs->cause = -1UL; /* If so, check system call restarting.. */ switch (regs->a0) { case -ERESTART_RESTARTBLOCK: @@ -239,7 +238,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs) /* fallthrough */ case -ERESTARTNOINTR: regs->a0 = regs->orig_a0; - regs->sepc -= 0x4; + regs->epc -= 0x4; break; } } @@ -261,9 +260,9 @@ static void do_signal(struct pt_regs *regs) } /* Did we come from a system call? */ - if (regs->scause == EXC_SYSCALL) { + if (regs->cause == EXC_SYSCALL) { /* Avoid additional syscall restarting via ret_from_exception */ - regs->scause = -1UL; + regs->cause = -1UL; /* Restart the system call - no handlers present */ switch (regs->a0) { @@ -271,12 +270,12 @@ static void do_signal(struct pt_regs *regs) case -ERESTARTSYS: case -ERESTARTNOINTR: regs->a0 = regs->orig_a0; - regs->sepc -= 0x4; + regs->epc -= 0x4; break; case -ERESTART_RESTARTBLOCK: regs->a0 = regs->orig_a0; regs->a7 = __NR_restart_syscall; - regs->sepc -= 0x4; + regs->epc -= 0x4; break; } } |