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| author | Laurent Vivier <lvivier@redhat.com> | 2017-12-12 18:23:56 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-12-22 15:36:24 +1100 |
| commit | 7333b5aca412d6ad02667b5a513485838a91b136 (patch) | |
| tree | 7e423044412cb3d9af78fb134a64d07be431a8f8 /block/blk-mq-virtio.c | |
| parent | dc1c4165d189350cb51bdd3057deb6ecd164beda (diff) | |
| download | linux-7333b5aca412d6ad02667b5a513485838a91b136.tar.bz2 | |
KVM: PPC: Book3S HV: Fix pending_pri value in kvmppc_xive_get_icp()
When we migrate a VM from a POWER8 host (XICS) to a POWER9 host
(XICS-on-XIVE), we have an error:
qemu-kvm: Unable to restore KVM interrupt controller state \
(0xff000000) for CPU 0: Invalid argument
This is because kvmppc_xics_set_icp() checks the new state
is internaly consistent, and especially:
...
1129 if (xisr == 0) {
1130 if (pending_pri != 0xff)
1131 return -EINVAL;
...
On the other side, kvmppc_xive_get_icp() doesn't set
neither the pending_pri value, nor the xisr value (set to 0)
(and kvmppc_xive_set_icp() ignores the pending_pri value)
As xisr is 0, pending_pri must be set to 0xff.
Fixes: 5af50993850a ("KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.12+
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'block/blk-mq-virtio.c')
0 files changed, 0 insertions, 0 deletions