Signed-off-by: Alistair Francis <alistair.fran...@wdc.com>
Reviewed-by: Palmer Dabbelt <pal...@sifive.com>
---
target/riscv/cpu_helper.c | 65 +++++++++++++++++++++++++++++++++------
1 file changed, 55 insertions(+), 10 deletions(-)
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index 1b747abf93..2c6d2bc3a3 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -641,6 +641,7 @@ void riscv_cpu_do_interrupt(CPUState *cs)
RISCVCPU *cpu = RISCV_CPU(cs);
CPURISCVState *env = &cpu->env;
+ target_ulong s;
/* cs->exception is 32-bits wide unlike mcause which is XLEN-bits wide
* so we mask off the MSB and separate into trap type and cause.
@@ -650,13 +651,6 @@ void riscv_cpu_do_interrupt(CPUState *cs)
target_ulong deleg = async ? env->mideleg : env->medeleg;
target_ulong tval = 0;
- static const int ecall_cause_map[] = {
- [PRV_U] = RISCV_EXCP_U_ECALL,
- [PRV_S] = RISCV_EXCP_S_ECALL,
- [PRV_H] = RISCV_EXCP_VS_ECALL,
- [PRV_M] = RISCV_EXCP_M_ECALL
- };
-
if (!async) {
/* set tval to badaddr for traps with address information */
switch (cause) {
@@ -680,7 +674,16 @@ void riscv_cpu_do_interrupt(CPUState *cs)
/* ecall is dispatched as one cause so translate based on mode */
if (cause == RISCV_EXCP_U_ECALL) {
assert(env->priv <= 3);
- cause = ecall_cause_map[env->priv];
+
+ if (env->priv == PRV_M) {
+ cause = RISCV_EXCP_M_ECALL;
+ } else if (env->priv == PRV_S && riscv_cpu_virt_enabled(env)) {
+ cause = RISCV_EXCP_VS_ECALL;
+ } else if (env->priv == PRV_S && !riscv_cpu_virt_enabled(env)) {
+ cause = RISCV_EXCP_S_ECALL;
+ } else if (env->priv == PRV_U) {
+ cause = RISCV_EXCP_U_ECALL;
+ }
}
}
@@ -690,7 +693,36 @@ void riscv_cpu_do_interrupt(CPUState *cs)
if (env->priv <= PRV_S &&
cause < TARGET_LONG_BITS && ((deleg >> cause) & 1)) {
/* handle the trap in S-mode */
- target_ulong s = *env->mstatus;
+ if (riscv_has_ext(env, RVH)) {
+ target_ulong hdeleg = async ? env->hideleg : env->hedeleg;
+
+ if (riscv_cpu_virt_enabled(env) && ((hdeleg >> cause) & 1) &&
+ !riscv_cpu_force_hs_excep_enabled(env)) {
+ /* Trap to VS mode */
+ } else if (riscv_cpu_virt_enabled(env)) {
+ /* Trap into HS mode, from virt */
+ riscv_cpu_swap_hypervisor_regs(env);
+ env->hstatus = set_field(env->hstatus, HSTATUS_SP2V,
+ get_field(env->hstatus, HSTATUS_SPV));
+ env->hstatus = set_field(env->hstatus, HSTATUS_SP2P,
+ get_field(*env->mstatus,
SSTATUS_SPP));
+ env->hstatus = set_field(env->hstatus, HSTATUS_SPV,
+ riscv_cpu_virt_enabled(env));
+
+ riscv_cpu_set_virt_enabled(env, 0);
+ riscv_cpu_set_force_hs_excep(env, 0);
+ } else {
+ /* Trap into HS mode */
+ env->hstatus = set_field(env->hstatus, HSTATUS_SP2V,
+ get_field(env->hstatus, HSTATUS_SPV));
+ env->hstatus = set_field(env->hstatus, HSTATUS_SP2P,
+ get_field(*env->mstatus,
SSTATUS_SPP));
+ env->hstatus = set_field(env->hstatus, HSTATUS_SPV,
+ riscv_cpu_virt_enabled(env));
+ }
+ }
+
+ s = *env->mstatus;
s = set_field(s, MSTATUS_SPIE, env->priv_ver >= PRIV_VERSION_1_10_0 ?
get_field(s, MSTATUS_SIE) : get_field(s, MSTATUS_UIE <<
env->priv));
s = set_field(s, MSTATUS_SPP, env->priv);
@@ -704,7 +736,20 @@ void riscv_cpu_do_interrupt(CPUState *cs)
riscv_cpu_set_mode(env, PRV_S);
} else {
/* handle the trap in M-mode */
- target_ulong s = *env->mstatus;
+ if (riscv_has_ext(env, RVH)) {
+ if (riscv_cpu_virt_enabled(env)) {
+ riscv_cpu_swap_hypervisor_regs(env);
+ }
+ *env->mstatus = set_field(*env->mstatus, MSTATUS_MPV,
+ riscv_cpu_virt_enabled(env));
+ *env->mstatus = set_field(*env->mstatus, MSTATUS_MTL,
+ riscv_cpu_force_hs_excep_enabled(env));
+
+ /* Trapping to M mode, virt is disabled */
+ riscv_cpu_set_virt_enabled(env, 0);
+ }
+
+ s = *env->mstatus;
s = set_field(s, MSTATUS_MPIE, env->priv_ver >= PRIV_VERSION_1_10_0 ?
get_field(s, MSTATUS_MIE) : get_field(s, MSTATUS_UIE <<
env->priv));
s = set_field(s, MSTATUS_MPP, env->priv);
--
2.24.0
