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accel/tcg: Implement helper_{ld,st}*_mmu for user-only

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TCG backends may need to defer to a helper to implement
the atomicity required by a given operation.  Mirror the
interface used in system mode.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2023-05-16 15:21:39 -07:00
parent 0cadc1eda1
commit de95016dfb
3 changed files with 278 additions and 127 deletions
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accel/tcg/user-exec.c
+274 -119
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File diff suppressed because it is too large Load Diff
include/tcg/tcg-ldst.h
+2 -4
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@@ -25,8 +25,6 @@
#ifndef TCG_LDST_H
#define TCG_LDST_H
#ifdef CONFIG_SOFTMMU
/* Value zero-extended to tcg register size. */
tcg_target_ulong helper_ldub_mmu(CPUArchState *env, target_ulong addr,
MemOpIdx oi, uintptr_t retaddr);
@@ -58,10 +56,10 @@ void helper_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
void helper_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
MemOpIdx oi, uintptr_t retaddr);
#else
#ifdef CONFIG_USER_ONLY
G_NORETURN void helper_unaligned_ld(CPUArchState *env, target_ulong addr);
G_NORETURN void helper_unaligned_st(CPUArchState *env, target_ulong addr);
#endif /* CONFIG_SOFTMMU */
#endif /* CONFIG_USER_ONLY */
#endif /* TCG_LDST_H */
tcg/tcg.c
+2 -4
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@@ -197,8 +197,7 @@ static void tcg_out_st_helper_args(TCGContext *s, const TCGLabelQemuLdst *l,
const TCGLdstHelperParam *p)
__attribute__((unused));
#ifdef CONFIG_SOFTMMU
static void * const qemu_ld_helpers[MO_SSIZE + 1] = {
static void * const qemu_ld_helpers[MO_SSIZE + 1] __attribute__((unused)) = {
[MO_UB] = helper_ldub_mmu,
[MO_SB] = helper_ldsb_mmu,
[MO_UW] = helper_lduw_mmu,
@@ -210,13 +209,12 @@ static void * const qemu_ld_helpers[MO_SSIZE + 1] = {
#endif
};
static void * const qemu_st_helpers[MO_SIZE + 1] = {
static void * const qemu_st_helpers[MO_SIZE + 1] __attribute__((unused)) = {
[MO_8] = helper_stb_mmu,
[MO_16] = helper_stw_mmu,
[MO_32] = helper_stl_mmu,
[MO_64] = helper_stq_mmu,
};
#endif
TCGContext tcg_init_ctx;
__thread TCGContext *tcg_ctx;