On Tue, Sep 14, 2021 at 11:37 AM <frank.ch...@sifive.com> wrote:
>
> From: Frank Chang <frank.ch...@sifive.com>
>
> When virtual registers are swapped, mstatus.SD bit should also be
> backed up/restored. Otherwise, mstatus.SD bit will be incorrectly kept
> across the world switches.
>
> Signed-off-by: Frank Chang <frank.ch...@sifive.com>
> Reviewed-by: Vincent Chen <vincent.c...@sifive.com>
Reviewed-by: Alistair Francis <alistair.fran...@wdc.com>
Alistair
> ---
> target/riscv/cpu_helper.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
> index 968cb8046f4..488867b59eb 100644
> --- a/target/riscv/cpu_helper.c
> +++ b/target/riscv/cpu_helper.c
> @@ -111,9 +111,10 @@ bool riscv_cpu_fp_enabled(CPURISCVState *env)
>
> void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env)
> {
> + target_ulong sd = riscv_cpu_is_32bit(env) ? MSTATUS32_SD : MSTATUS64_SD;
> uint64_t mstatus_mask = MSTATUS_MXR | MSTATUS_SUM | MSTATUS_FS |
> MSTATUS_SPP | MSTATUS_SPIE | MSTATUS_SIE |
> - MSTATUS64_UXL;
> + MSTATUS64_UXL | sd;
> bool current_virt = riscv_cpu_virt_enabled(env);
>
> g_assert(riscv_has_ext(env, RVH));
> --
> 2.25.1
>
>
