From eccc5a12c2fd1c646c69a1e7de29183b7a559973 Mon Sep 17 00:00:00 2001 From: Alistair Francis Date: Fri, 31 Jan 2020 17:02:25 -0800 Subject: [PATCH] target/ricsv: Flush the TLB on virtulisation mode changes To ensure our TLB isn't out-of-date we flush it on all virt mode changes.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 Reviewed-by: Palmer Dabbelt Signed-off-by: Palmer Dabbelt --- 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 ccf67aca05..a8b114ae16 100644 --- a/target/riscv/cpu_helper.c +++ b/target/riscv/cpu_helper.c @@ -181,6 +181,11 @@ void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable) return; } + /* Flush the TLB on all virt mode changes. */ + if (get_field(env->virt, VIRT_ONOFF) != enable) { + tlb_flush(env_cpu(env)); + } + env->virt = set_field(env->virt, VIRT_ONOFF, enable); }