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qemu-patch-raspberry4
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target/microblaze: Make mb_cpu_tlb_fill sysemu only 

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

Remove the code from cpu_loop that handled the unnamed 0xaa exception.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
staging
Richard Henderson 2021-09-14 17:17:38 -07:00
parent 028772c45c
commit fd297732a2
4 changed files with 6 additions and 27 deletions
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10
linux-user/microblaze/cpu_loop.c
View File

@ -37,16 +37,6 @@ void cpu_loop(CPUMBState *env)
process_queued_cpu_work(cs);
switch (trapnr) {
case 0xaa:
{
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
/* XXX: check env->error_code */
info.si_code = TARGET_SEGV_MAPERR;
info._sifields._sigfault._addr = 0;
queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info);
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;

2
target/microblaze/cpu.c
View File

@ -365,9 +365,9 @@ static const struct SysemuCPUOps mb_sysemu_ops = {
static const struct TCGCPUOps mb_tcg_ops = {
.initialize = mb_tcg_init,
.synchronize_from_tb = mb_cpu_synchronize_from_tb,
.tlb_fill = mb_cpu_tlb_fill,
#ifndef CONFIG_USER_ONLY
.tlb_fill = mb_cpu_tlb_fill,
.cpu_exec_interrupt = mb_cpu_exec_interrupt,
.do_interrupt = mb_cpu_do_interrupt,
.do_transaction_failed = mb_cpu_transaction_failed,

8
target/microblaze/cpu.h
View File

@ -394,10 +394,6 @@ void mb_tcg_init(void);
#define MMU_USER_IDX 2
/* See NB_MMU_MODES further up the file. */
bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
typedef CPUMBState CPUArchState;
typedef MicroBlazeCPU ArchCPU;
@ -415,6 +411,10 @@ static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc,
}
#if !defined(CONFIG_USER_ONLY)
bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
void mb_cpu_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
unsigned size, MMUAccessType access_type,
int mmu_idx, MemTxAttrs attrs,

13
target/microblaze/helper.c
View File

@ -24,18 +24,7 @@
#include "qemu/host-utils.h"
#include "exec/log.h"
#if defined(CONFIG_USER_ONLY)
bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr)
{
cs->exception_index = 0xaa;
cpu_loop_exit_restore(cs, retaddr);
}
#else /* !CONFIG_USER_ONLY */
#ifndef CONFIG_USER_ONLY
static bool mb_cpu_access_is_secure(MicroBlazeCPU *cpu,
MMUAccessType access_type)
{