Here is the link to the patch
https://lists.nongnu.org/archive/html/qemu-riscv/2020-01/msg00191.html

-Rajnesh

On Tue, Feb 25, 2020 at 12:06 AM Alistair Francis <alistair23@gmail.com>
wrote:

> On Sun, Feb 23, 2020 at 11:23 AM Jose Martins <josemartins90@gmail.com>
> wrote:
> >
> > Hello rajnesh,
> >
> > I had already submitted almost this exact patch a few weeks ago.
>
> To QEMU? I don't see the patch.
>
> Alistair
>
> >
> > Jose
> >
> > On Sun, 23 Feb 2020 at 13:51, <rajnesh.kanwal49@gmail.com> wrote:
> > >
> > > From: Rajnesh Kanwal <rajnesh.kanwal49@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.kanwal49@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
> > >
> > >
> >
>