On 10/20/2016 08:59 AM, Nicholas Piggin wrote:
> Date: Thu, 20 Oct 2016 17:38:24 +1100
> Subject: [PATCH 0/3] ppc: system reset interrupt fixes and new hcall IPI
>
> Hi,
>
> We are implementing this new unmaskable IPI hcall for crash dumping
> and debugging. I had some issues with QEMU delivering system reset
> interrupt to guests, which was caused by the HV bit being set. After
> changing that, the interrupt was being handled okay. Should there be
> a more general check to ensure the HV bit is not set in the guest?
cpu_ppc_set_papr() called by cpu_init() does :
env->msr_mask &= ~((1ull << MSR_EP) | MSR_HVB);
and then for the reset :
ppc_cpu_reset()
hreg_store_msr()
value &= env->msr_mask;
at first sight, we should be fine ?
C.
>
> I implemented Linux support for the new hcall in crashdump code, and
> it works.
>
> Thanks,
> Nick
>
> Nicholas Piggin (3):
> ppc: fix MSR_ME handling for system reset interrupt
> ppc: allow system reset interrupt to be delivered to guests
> ppc/spapr: implement H_SIGNAL_SYS_RESET
>
> hw/ppc/spapr_hcall.c | 42 ++++++++++++++++++++++++++++++++++++++++++
> include/hw/ppc/spapr.h | 8 +++++++-
> target-ppc/excp_helper.c | 10 +++++++---
> 3 files changed, 56 insertions(+), 4 deletions(-)
>
