From c5969a3a3c2cb9ea02ffb7e86acb059d3cf8c264 Mon Sep 17 00:00:00 2001 From: Rajnesh Kanwal Date: Sun, 23 Feb 2020 15:28:06 +0500 Subject: target/riscv: Fix VS mode interrupts forwarding. Currently riscv_cpu_local_irq_pending is used to find out pending interrupt and VS mode interrupts are being shifted to represent S mode interrupts in this function. So when the cause returned by this function is passed to riscv_cpu_do_interrupt to actually forward the interrupt, the VS mode forwarding check does not work as intended and interrupt is actually forwarded to hypervisor. This patch fixes this issue. Signed-off-by: Rajnesh Kanwal Reviewed-by: Palmer Dabbelt Signed-off-by: Palmer Dabbelt --- target/riscv/cpu_helper.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c index 5ea5d13..d3ba9ef 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -46,7 +46,7 @@ static int riscv_cpu_local_irq_pending(CPURISCVState *env) 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; + (MIP_VSSIP | MIP_VSTIP | MIP_VSEIP)); target_ulong mie = env->priv < PRV_M || (env->priv == PRV_M && mstatus_mie); @@ -907,6 +907,13 @@ void riscv_cpu_do_interrupt(CPUState *cs) if (riscv_cpu_virt_enabled(env) && ((hdeleg >> cause) & 1) && !force_hs_execp) { + /* + * See if we need to adjust cause. Yes if its VS mode interrupt + * no if hypervisor has delegated one of hs mode's interrupt + */ + if (cause == IRQ_VS_TIMER || cause == IRQ_VS_SOFT || + cause == IRQ_VS_EXT) + cause = cause - 1; /* Trap to VS mode */ } else if (riscv_cpu_virt_enabled(env)) { /* Trap into HS mode, from virt */ -- cgit v1.1