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[Qemu-devel] [PATCH 0/2] kvm: Fix incorrect re-register of in-kernel MPI
From: |
Bogdan Purcareata |
Subject: |
[Qemu-devel] [PATCH 0/2] kvm: Fix incorrect re-register of in-kernel MPIC |
Date: |
Wed, 3 Sep 2014 13:38:36 -0400 |
On target-ppc, the kvm-openpic memory region is part of the E500-CCSR memory
region. On the kernel side, the MPIC is mapped at the same offset as the
kvm-openpic within the address space.
When adding the PCI BAR0 memory region, an alias is created to point to the
E500-CCSR memory region. This results in firing the kvm_openpic_region_add once
more, since kvm-openpic is part of the latter. Only this time, the offset is
wrong - it's part of the PCI memory region. This leads to the in-kernel MPIC to
be remapped at a wrong address, and thus all traps to the kvm-openpic
address to be emulated in userspace.
The fix consists in an additional filter in kvm_openpic_region_add to consider
only addresses matching the start of the kvm-openpic memory region.
- [Qemu-devel] [PATCH 0/2] kvm: Fix incorrect re-register of in-kernel MPIC,
Bogdan Purcareata <=