[PATCH v2 18/35] target/riscv: Add support for virtual interrupt setting

[Alistair Francis]

Signed-off-by: Alistair Francis <alistair.fran...@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabb...@google.com>
---
 target/riscv/cpu_helper.c | 33 ++++++++++++++++++++++++++++-----
 1 file changed, 28 insertions(+), 5 deletions(-)

diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index e9d75b45d6..3984a1f1ac 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -37,13 +37,36 @@ int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch)
 #ifndef CONFIG_USER_ONLY
 static int riscv_cpu_local_irq_pending(CPURISCVState *env)
 {
+    target_ulong irqs;
+
     target_ulong mstatus_mie = get_field(env->mstatus, MSTATUS_MIE);
     target_ulong mstatus_sie = get_field(env->mstatus, MSTATUS_SIE);
-    target_ulong pending = env->mip & env->mie;
-    target_ulong mie = env->priv < PRV_M || (env->priv == PRV_M && 
mstatus_mie);
-    target_ulong sie = env->priv < PRV_S || (env->priv == PRV_S && 
mstatus_sie);
-    target_ulong irqs = (pending & ~env->mideleg & -mie) |
-                        (pending &  env->mideleg & -sie);
+    target_ulong hs_mstatus_sie = get_field(env->mstatus_hs, MSTATUS_SIE);
+
+    target_ulong pending = env->mip & env->mie &
+                               ~(MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
+    target_ulong vspending = (env->mip & env->mie &
+                              (MIP_VSSIP | MIP_VSTIP | MIP_VSEIP)) >> 1;
+
+    target_ulong mie    = env->priv < PRV_M ||
+                          (env->priv == PRV_M && mstatus_mie);
+    target_ulong sie    = env->priv < PRV_S ||
+                          (env->priv == PRV_S && mstatus_sie);
+    target_ulong hs_sie = env->priv < PRV_S ||
+                          (env->priv == PRV_S && hs_mstatus_sie);
+
+    if (riscv_cpu_virt_enabled(env)) {
+        target_ulong pending_hs_irq = pending & -hs_sie;
+
+        if (pending_hs_irq) {
+            riscv_cpu_set_force_hs_excep(env, FORCE_HS_EXCEP);
+            return ctz64(pending_hs_irq);
+        }
+
+        pending = vspending;
+    }
+
+    irqs = (pending & ~env->mideleg & -mie) | (pending &  env->mideleg & -sie);
 
     if (irqs) {
         return ctz64(irqs); /* since non-zero */
-- 
2.25.0