# Re: \[PATCH 1/2\] powerpc/book3e-64: hv exceptions aren't MASKABLE

- From: Kumar Gala \<hidden\>
- Date: 2011-05-20 19:36:15 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2011/05/9464656
- Thread: https://ratatoskr.run/linuxppc-dev/2011/05/9464649/t.md

```text

On May 20, 2011, at 2:00 PM, Scott Wood wrote:

> In general we will not have EE soft-disabled or be napping when
> these exceptions happen, but still it is not correct.
>=20
> The guest doorbell exceptions can only be triggered with MSR[GS]=3D1,
> and thus for host kernel nesting purposes are base-level exceptions.
>=20
> Note that ehpriv and hypercall are triggerable from normal userspace.
> I tested that the process gets properly signalled in this case.
>=20
> Signed-off-by: Scott Wood <redacted>
> ---
> arch/powerpc/include/asm/reg_booke.h |    2 +
> arch/powerpc/kernel/exceptions-64e.S |   67 =
++++++++++++++++++++++++++--------
> 2 files changed, 53 insertions(+), 16 deletions(-)

Can you look at a similar patch for 32-bit fsl-booke so we handle HV =
exceptions if they happen to get generated, maybe something already =
exists for KVM.

- k=
```