diff options
| author | Alistair Francis <alistair.francis@wdc.com> | 2020-01-31 17:02:25 -0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-02-27 13:45:40 -0800 |
| commit | eccc5a12c2fd1c646c69a1e7de29183b7a559973 (patch) | |
| tree | e84a503e2c2d708275c1d6057c41d0cb1c14e795 /target/riscv | |
| parent | 3ef10a098b0d3ebb02bf8e1325adc3b77af92f0b (diff) | |
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To ensure our TLB isn't out-of-date we flush it on all virt mode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 <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'target/riscv')
| -rw-r--r-- | target/riscv/cpu_helper.c | 5 |
1 files changed, 5 insertions, 0 deletions
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); } |