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| author | Richard Henderson <richard.henderson@linaro.org> | 2023-11-01 11:08:11 +0800 |
|---|---|---|
| committer | Song Gao <gaosong@loongson.cn> | 2023-11-03 14:13:18 +0800 |
| commit | 91ffd93be614da080a6dd8826d999e3e4761f78b (patch) | |
| tree | c4fbc2dc2e9a6e61cea08c88120b2b9ca4b5c9af /linux-user | |
| parent | 1d832c19db1e895b7d8015c3b33fc6311e20a69c (diff) | |
| download | qemu-91ffd93be614da080a6dd8826d999e3e4761f78b.zip qemu-91ffd93be614da080a6dd8826d999e3e4761f78b.tar.gz qemu-91ffd93be614da080a6dd8826d999e3e4761f78b.tar.bz2 | |
linux-user/loongarch64: Use traps to track LSX/LASX usage
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231101030816.2353416-2-gaosong@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/loongarch64/cpu_loop.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/linux-user/loongarch64/cpu_loop.c b/linux-user/loongarch64/cpu_loop.c index 894fdd1..73d7b67 100644 --- a/linux-user/loongarch64/cpu_loop.c +++ b/linux-user/loongarch64/cpu_loop.c @@ -72,6 +72,19 @@ void cpu_loop(CPULoongArchState *env) case EXCCODE_BCE: force_sig_fault(TARGET_SIGSYS, TARGET_SI_KERNEL, env->pc); break; + + /* + * Begin with LSX and LASX disabled, then enable on the first trap. + * In this way we can tell if the unit is in use. This is used to + * choose the layout of any signal frame. + */ + case EXCCODE_SXD: + env->CSR_EUEN |= R_CSR_EUEN_SXE_MASK; + break; + case EXCCODE_ASXD: + env->CSR_EUEN |= R_CSR_EUEN_ASXE_MASK; + break; + case EXCP_ATOMIC: cpu_exec_step_atomic(cs); break; |