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linux-user/loongarch64: Add LASX sigcontext save/restore 

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231101030816.2353416-7-gaosong@loongson.cn>
master
Song Gao 2023-11-01 11:08:16 +08:00
parent 90ea967d14
commit f707773753
1 changed files with 62 additions and 6 deletions
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68
linux-user/loongarch64/signal.c
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@ -49,6 +49,14 @@ struct target_lsx_context {
abi_uint fcsr;
} QEMU_ALIGNED(LSX_CTX_ALIGN);
#define LASX_CTX_MAGIC 0x41535801
#define LASX_CTX_ALIGN 32
struct target_lasx_context {
abi_ulong regs[4 * 32];
abi_ulong fcc;
abi_uint fcsr;
} QEMU_ALIGNED(LASX_CTX_ALIGN);
#define CONTEXT_INFO_ALIGN 16
struct target_sctx_info {
abi_uint magic;
@ -93,6 +101,7 @@ struct extctx_layout {
unsigned int flags;
struct ctx_layout fpu;
struct ctx_layout lsx;
struct ctx_layout lasx;
struct ctx_layout end;
};
@ -125,10 +134,12 @@ static abi_ptr setup_extcontext(CPULoongArchState *env,
/* For qemu, there is no lazy fp context switch, so fp always present. */
extctx->flags = SC_USED_FP;
if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, ASXE)) {
sp = extframe_alloc(extctx, &extctx->lasx,
sizeof(struct target_lasx_context), LASX_CTX_ALIGN, sp);
} else if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
sp = extframe_alloc(extctx, &extctx->lsx,
sizeof(struct target_lsx_context), LSX_CTX_ALIGN, sp);
} else {
sp = extframe_alloc(extctx, &extctx->fpu,
sizeof(struct target_fpu_context), FPU_CTX_ALIGN, sp);
@ -155,7 +166,24 @@ static void setup_sigframe(CPULoongArchState *env,
* Set extension context
*/
if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, ASXE)) {
struct target_lasx_context *lasx_ctx;
info = extctx->lasx.haddr;
__put_user(LASX_CTX_MAGIC, &info->magic);
__put_user(extctx->lasx.size, &info->size);
lasx_ctx = (struct target_lasx_context *)(info + 1);
for (i = 0; i < 32; ++i) {
__put_user(env->fpr[i].vreg.UD(0), &lasx_ctx->regs[4 * i]);
__put_user(env->fpr[i].vreg.UD(1), &lasx_ctx->regs[4 * i + 1]);
__put_user(env->fpr[i].vreg.UD(2), &lasx_ctx->regs[4 * i + 2]);
__put_user(env->fpr[i].vreg.UD(3), &lasx_ctx->regs[4 * i + 3]);
}
__put_user(read_fcc(env), &lasx_ctx->fcc);
__put_user(env->fcsr0, &lasx_ctx->fcsr);
} else if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
struct target_lsx_context *lsx_ctx;
info = extctx->lsx.haddr;
@ -230,6 +258,15 @@ static bool parse_extcontext(struct extctx_layout *extctx, abi_ptr frame)
extctx->lsx.size = size;
extctx->size += size;
break;
case LASX_CTX_MAGIC:
if (size < (sizeof(struct target_sctx_info) +
sizeof(struct target_lasx_context))) {
return false;
}
extctx->lasx.gaddr = frame;
extctx->lasx.size = size;
extctx->size += size;
break;
default:
return false;
}
@ -250,7 +287,21 @@ static void restore_sigframe(CPULoongArchState *env,
__get_user(env->gpr[i], &sc->sc_regs[i]);
}
if (extctx->lsx.haddr) {
if (extctx->lasx.haddr) {
struct target_lasx_context *lasx_ctx =
extctx->lasx.haddr + sizeof(struct target_sctx_info);
for (i = 0; i < 32; ++i) {
__get_user(env->fpr[i].vreg.UD(0), &lasx_ctx->regs[4 * i]);
__get_user(env->fpr[i].vreg.UD(1), &lasx_ctx->regs[4 * i + 1]);
__get_user(env->fpr[i].vreg.UD(2), &lasx_ctx->regs[4 * i + 2]);
__get_user(env->fpr[i].vreg.UD(3), &lasx_ctx->regs[4 * i + 3]);
}
__get_user(fcc, &lasx_ctx->fcc);
write_fcc(env, fcc);
__get_user(env->fcsr0, &lasx_ctx->fcsr);
restore_fp_status(env);
} else if (extctx->lsx.haddr) {
struct target_lsx_context *lsx_ctx =
extctx->lsx.haddr + sizeof(struct target_sctx_info);
@ -314,7 +365,10 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
return;
}
if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, ASXE)) {
extctx.lasx.haddr = (void *)frame + (extctx.lasx.gaddr - frame_addr);
extctx.end.haddr = (void *)frame + (extctx.end.gaddr - frame_addr);
} else if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
extctx.lsx.haddr = (void *)frame + (extctx.lsx.gaddr - frame_addr);
extctx.end.haddr = (void *)frame + (extctx.end.gaddr - frame_addr);
} else {
@ -364,7 +418,9 @@ long do_rt_sigreturn(CPULoongArchState *env)
goto badframe;
}
if (extctx.lsx.gaddr) {
if (extctx.lasx.gaddr) {
extctx.lasx.haddr = (void *)frame + (extctx.lasx.gaddr - frame_addr);
} else if (extctx.lsx.gaddr) {
extctx.lsx.haddr = (void *)frame + (extctx.lsx.gaddr - frame_addr);
} else if (extctx.fpu.gaddr) {
extctx.fpu.haddr = (void *)frame + (extctx.fpu.gaddr - frame_addr);