When the PLIC generates an interrupt ensure we always set it for the SIP
CSR that corresponds to the HS (V=0) register.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 hw/riscv/sifive_plic.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/hw/riscv/sifive_plic.c b/hw/riscv/sifive_plic.c
index 1e7e4c8d51..25da29fa3d 100644
--- a/hw/riscv/sifive_plic.c
+++ b/hw/riscv/sifive_plic.c
@@ -147,7 +147,17 @@ static void sifive_plic_update(SiFivePLICState *plic)
             riscv_cpu_update_mip(RISCV_CPU(cpu), MIP_MEIP, BOOL_TO_MASK(level));
             break;
         case PLICMode_S:
-            riscv_cpu_update_mip(RISCV_CPU(cpu), MIP_SEIP, BOOL_TO_MASK(level));
+            if (riscv_cpu_virt_enabled(env)) {
+                if (level) {
+                    atomic_or(&env->bsip, MIP_SEIP);
+                    g_assert(riscv_cpu_virt_enabled(env));
+                } else {
+                    atomic_and(&env->bsip, ~MIP_SEIP);
+                    g_assert(riscv_cpu_virt_enabled(env));
+                }
+            } else {
+                riscv_cpu_update_mip(RISCV_CPU(cpu), MIP_SEIP, BOOL_TO_MASK(level));
+            }
             break;
         default:
             break;
-- 
2.21.0