To ensure our TLB isn't out-of-date we flush it on all virt mode
changes. Unlike priv mode this isn't saved in the mmu_idx as all
guests share V=1. The easiest option is just to flush on all changes.
Signed-off-by: Alistair Francis <address@hidden>
---
target/riscv/cpu_helper.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index afb3e8579e..8e8b156fc0 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -203,6 +203,11 @@ void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool
enable)
return;
}
+ /* Flush the TLB on all virt mode changes. */
+ if (((env->virt & VIRT_MODE_MASK) >> VIRT_MODE_SHIFT) != enable) {
+ tlb_flush(env_cpu(env));
+ }
+
env->virt &= ~VIRT_MODE_MASK;
env->virt |= enable << VIRT_MODE_SHIFT;
}