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target/riscv: Make riscv_cpu_tlb_fill sysemu only 

The fallback code in cpu_loop_exit_sigsegv is sufficient
for riscv linux-user.

Remove the code from cpu_loop that raised SIGSEGV.

Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-09-14 20:46:38 -07:00
parent 1db8af5c87
commit 263e2ab20c
3 changed files with 2 additions and 28 deletions
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7
linux-user/riscv/cpu_loop.c
View File

@ -87,13 +87,6 @@ void cpu_loop(CPURISCVState *env)
sigcode = TARGET_TRAP_BRKPT;
sigaddr = env->pc;
break;
case RISCV_EXCP_INST_PAGE_FAULT:
case RISCV_EXCP_LOAD_PAGE_FAULT:
case RISCV_EXCP_STORE_PAGE_FAULT:
signum = TARGET_SIGSEGV;
sigcode = TARGET_SEGV_MAPERR;
sigaddr = env->badaddr;
break;
case RISCV_EXCP_SEMIHOST:
env->gpr[xA0] = do_common_semihosting(cs);
env->pc += 4;

2
target/riscv/cpu.c
View File

@ -694,9 +694,9 @@ static const struct SysemuCPUOps riscv_sysemu_ops = {
static const struct TCGCPUOps riscv_tcg_ops = {
.initialize = riscv_translate_init,
.synchronize_from_tb = riscv_cpu_synchronize_from_tb,
.tlb_fill = riscv_cpu_tlb_fill,
#ifndef CONFIG_USER_ONLY
.tlb_fill = riscv_cpu_tlb_fill,
.cpu_exec_interrupt = riscv_cpu_exec_interrupt,
.do_interrupt = riscv_cpu_do_interrupt,
.do_transaction_failed = riscv_cpu_do_transaction_failed,

21
target/riscv/cpu_helper.c
View File

@ -814,7 +814,6 @@ void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
riscv_cpu_two_stage_lookup(mmu_idx);
riscv_raise_exception(env, cs->exception_index, retaddr);
}
#endif /* !CONFIG_USER_ONLY */
bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
@ -822,7 +821,6 @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
{
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
#ifndef CONFIG_USER_ONLY
vaddr im_address;
hwaddr pa = 0;
int prot, prot2, prot_pmp;
@ -954,25 +952,8 @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
}
return true;
#else
switch (access_type) {
case MMU_INST_FETCH:
cs->exception_index = RISCV_EXCP_INST_PAGE_FAULT;
break;
case MMU_DATA_LOAD:
cs->exception_index = RISCV_EXCP_LOAD_PAGE_FAULT;
break;
case MMU_DATA_STORE:
cs->exception_index = RISCV_EXCP_STORE_PAGE_FAULT;
break;
default:
g_assert_not_reached();
}
env->badaddr = address;
cpu_loop_exit_restore(cs, retaddr);
#endif
}
#endif /* !CONFIG_USER_ONLY */
/*
* Handle Traps