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target/sparc: Use GET_ASI_CODE for ASI_KERNELTXT and ASI_USERTXT 

Reads are done with execute access.  It is not clear whether writes
are legal at all -- for now, leave helper_st_asi unchanged, so that
we continue to raise an mmu fault.

This generalizes the exiting code for ASI_KERNELTXT to be usable for
ASI_USERTXT as well, by passing down the MemOpIdx to use.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2281
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2059
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1609
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1166
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: M Bazz <bazz@bazz1.com>
This commit is contained in:
Richard Henderson 2024-04-11 17:30:07 -07:00
parent be72d6ab36
commit 2786a3f8d3
3 changed files with 94 additions and 22 deletions
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3
target/sparc/helper.h
View File

@ -32,6 +32,9 @@ DEF_HELPER_FLAGS_3(udiv, TCG_CALL_NO_WG, i64, env, tl, tl)
DEF_HELPER_FLAGS_3(sdiv, TCG_CALL_NO_WG, i64, env, tl, tl)
DEF_HELPER_3(taddcctv, tl, env, tl, tl)
DEF_HELPER_3(tsubcctv, tl, env, tl, tl)
#if !defined(CONFIG_USER_ONLY) && !defined(TARGET_SPARC64)
DEF_HELPER_FLAGS_3(ld_code, TCG_CALL_NO_WG, i64, env, tl, i32)
#endif
#if !defined(CONFIG_USER_ONLY) || defined(TARGET_SPARC64)
DEF_HELPER_FLAGS_4(ld_asi, TCG_CALL_NO_WG, i64, env, tl, int, i32)
DEF_HELPER_FLAGS_5(st_asi, TCG_CALL_NO_WG, void, env, tl, i64, int, i32)

65
target/sparc/ldst_helper.c
View File

@ -585,7 +585,6 @@ uint64_t helper_ld_asi(CPUSPARCState *env, target_ulong addr,
#if defined(DEBUG_MXCC) || defined(DEBUG_ASI)
uint32_t last_addr = addr;
#endif
MemOpIdx oi;
do_check_align(env, addr, size - 1, GETPC());
switch (asi) {
@ -684,24 +683,6 @@ uint64_t helper_ld_asi(CPUSPARCState *env, target_ulong addr,
case ASI_M_DIAGS: /* Turbosparc DTLB Diagnostic */
case ASI_M_IODIAG: /* Turbosparc IOTLB Diagnostic */
break;
case ASI_KERNELTXT: /* Supervisor code access */
oi = make_memop_idx(memop, cpu_mmu_index(env_cpu(env), true));
switch (size) {
case 1:
ret = cpu_ldb_code_mmu(env, addr, oi, GETPC());
break;
case 2:
ret = cpu_ldw_code_mmu(env, addr, oi, GETPC());
break;
default:
case 4:
ret = cpu_ldl_code_mmu(env, addr, oi, GETPC());
break;
case 8:
ret = cpu_ldq_code_mmu(env, addr, oi, GETPC());
break;
}
break;
case ASI_M_TXTC_TAG: /* SparcStation 5 I-cache tag */
case ASI_M_TXTC_DATA: /* SparcStation 5 I-cache data */
case ASI_M_DATAC_TAG: /* SparcStation 5 D-cache tag */
@ -779,7 +760,6 @@ uint64_t helper_ld_asi(CPUSPARCState *env, target_ulong addr,
case 0x4c: /* SuperSPARC MMU Breakpoint Action */
ret = env->mmubpaction;
break;
case ASI_USERTXT: /* User code access, XXX */
default:
sparc_raise_mmu_fault(cs, addr, false, false, asi, size, GETPC());
ret = 0;
@ -787,6 +767,8 @@ uint64_t helper_ld_asi(CPUSPARCState *env, target_ulong addr,
case ASI_USERDATA: /* User data access */
case ASI_KERNELDATA: /* Supervisor data access */
case ASI_USERTXT: /* User code access */
case ASI_KERNELTXT: /* Supervisor code access */
case ASI_P: /* Implicit primary context data access (v9 only?) */
case ASI_M_BYPASS: /* MMU passthrough */
case ASI_LEON_BYPASS: /* LEON MMU passthrough */
@ -1161,6 +1143,49 @@ void helper_st_asi(CPUSPARCState *env, target_ulong addr, uint64_t val,
#endif
}
uint64_t helper_ld_code(CPUSPARCState *env, target_ulong addr, uint32_t oi)
{
MemOp mop = get_memop(oi);
uintptr_t ra = GETPC();
uint64_t ret;
switch (mop & MO_SIZE) {
case MO_8:
ret = cpu_ldb_code_mmu(env, addr, oi, ra);
if (mop & MO_SIGN) {
ret = (int8_t)ret;
}
break;
case MO_16:
ret = cpu_ldw_code_mmu(env, addr, oi, ra);
if ((mop & MO_BSWAP) != MO_TE) {
ret = bswap16(ret);
}
if (mop & MO_SIGN) {
ret = (int16_t)ret;
}
break;
case MO_32:
ret = cpu_ldl_code_mmu(env, addr, oi, ra);
if ((mop & MO_BSWAP) != MO_TE) {
ret = bswap32(ret);
}
if (mop & MO_SIGN) {
ret = (int32_t)ret;
}
break;
case MO_64:
ret = cpu_ldq_code_mmu(env, addr, oi, ra);
if ((mop & MO_BSWAP) != MO_TE) {
ret = bswap64(ret);
}
break;
default:
g_assert_not_reached();
}
return ret;
}
#endif /* CONFIG_USER_ONLY */
#else /* TARGET_SPARC64 */

48
target/sparc/translate.c
View File

@ -1117,6 +1117,7 @@ typedef enum {
GET_ASI_EXCP,
GET_ASI_DIRECT,
GET_ASI_DTWINX,
GET_ASI_CODE,
GET_ASI_BLOCK,
GET_ASI_SHORT,
GET_ASI_BCOPY,
@ -1159,14 +1160,22 @@ static DisasASI resolve_asi(DisasContext *dc, int asi, MemOp memop)
|| (asi == ASI_USERDATA
&& (dc->def->features & CPU_FEATURE_CASA))) {
switch (asi) {
case ASI_USERDATA: /* User data access */
case ASI_USERDATA: /* User data access */
mem_idx = MMU_USER_IDX;
type = GET_ASI_DIRECT;
break;
case ASI_KERNELDATA: /* Supervisor data access */
case ASI_KERNELDATA: /* Supervisor data access */
mem_idx = MMU_KERNEL_IDX;
type = GET_ASI_DIRECT;
break;
case ASI_USERTXT: /* User text access */
mem_idx = MMU_USER_IDX;
type = GET_ASI_CODE;
break;
case ASI_KERNELTXT: /* Supervisor text access */
mem_idx = MMU_KERNEL_IDX;
type = GET_ASI_CODE;
break;
case ASI_M_BYPASS: /* MMU passthrough */
case ASI_LEON_BYPASS: /* LEON MMU passthrough */
mem_idx = MMU_PHYS_IDX;
@ -1379,6 +1388,21 @@ static void gen_ld_asi(DisasContext *dc, DisasASI *da, TCGv dst, TCGv addr)
case GET_ASI_DIRECT:
tcg_gen_qemu_ld_tl(dst, addr, da->mem_idx, da->memop | MO_ALIGN);
break;
case GET_ASI_CODE:
#if !defined(CONFIG_USER_ONLY) && !defined(TARGET_SPARC64)
{
MemOpIdx oi = make_memop_idx(da->memop, da->mem_idx);
TCGv_i64 t64 = tcg_temp_new_i64();
gen_helper_ld_code(t64, tcg_env, addr, tcg_constant_i32(oi));
tcg_gen_trunc_i64_tl(dst, t64);
}
break;
#else
g_assert_not_reached();
#endif
default:
{
TCGv_i32 r_asi = tcg_constant_i32(da->asi);
@ -1791,6 +1815,26 @@ static void gen_ldda_asi(DisasContext *dc, DisasASI *da, TCGv addr, int rd)
}
break;
case GET_ASI_CODE:
#if !defined(CONFIG_USER_ONLY) && !defined(TARGET_SPARC64)
{
MemOpIdx oi = make_memop_idx(da->memop, da->mem_idx);
TCGv_i64 tmp = tcg_temp_new_i64();
gen_helper_ld_code(tmp, tcg_env, addr, tcg_constant_i32(oi));
/* See above. */
if ((da->memop & MO_BSWAP) == MO_TE) {
tcg_gen_extr_i64_tl(lo, hi, tmp);
} else {
tcg_gen_extr_i64_tl(hi, lo, tmp);
}
}
break;
#else
g_assert_not_reached();
#endif
default:
/* ??? In theory we've handled all of the ASIs that are valid
for ldda, and this should raise DAE_invalid_asi. However,