Hello Jose,
Sorry I didn't see that as it hadn't became a part of the port. I don't
know how
they proceed with same patches.
Just to add, there is a minor problem with your patch. The cause value
should
only be decremented by one for VS mode interrupts. In case if hypervisor has
delegated S mode interrupts then we should not decrement cause for those
interrupts.
Regards,
Rajnesh
On Sun, Feb 23, 2020 at 7:41 PM Jose Martins <josemartin...@gmail.com>
wrote:
> Hello rajnesh,
>
> I had already submitted almost this exact patch a few weeks ago.
>
> Jose
>
> On Sun, 23 Feb 2020 at 13:51, <rajnesh.kanwa...@gmail.com> wrote:
> >
> > From: Rajnesh Kanwal <rajnesh.kanwa...@gmail.com>
> >
> > 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 <rajnesh.kanwa...@gmail.com>
> > ---
> > 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 b9e90dfd9a..59535ecba6 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);
> > @@ -900,6 +900,13 @@ 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 */
> > --
> > 2.17.1
> >
> >
>
