| commit | 229e16fd247c7d39822627916d18b52f733cbfa1 | |
| author | Sam Bobroff <sam.bobroff@au1.ibm.com> | |
| Thu, 27 Apr 2017 06:32:03 +0000 (27 16:32 +1000) | ||
| committer | David Gibson <david@gibson.dropbear.id.au> | |
| Wed, 10 May 2017 23:45:15 +0000 (11 09:45 +1000) | ||
| tree | 07f616752167eb37f19eb55eed6651db2b1f9122 | treesnapshot (tar.gz zip) |
| parent | 063cb7cbc9f65ff4095df884cfcd7eaf3a160555 | commitdiff |
ppc/xics: preserve P and Q bits for KVM IRQs
Kernel commit 17d48610ae0f ("KVM: PPC: Book 3S: XICS: Implement ICS
P/Q states") added new bits to the state used by KVM IRQs. Currently,
QEMU does not preserve these bits, so migrating (or otherwise saving
and restoring) the guest state causes the P and Q bits to be cleared.
Clearing the P bit has no effect, because the kernel will set it based
on other data, but the loss of a set Q bit will cause a lost
interrupt.
This patch preserves the P and Q bits, correcting the problem.
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Kernel commit 17d48610ae0f ("KVM: PPC: Book 3S: XICS: Implement ICS
P/Q states") added new bits to the state used by KVM IRQs. Currently,
QEMU does not preserve these bits, so migrating (or otherwise saving
and restoring) the guest state causes the P and Q bits to be cleared.
Clearing the P bit has no effect, because the kernel will set it based
on other data, but the loss of a set Q bit will cause a lost
interrupt.
This patch preserves the P and Q bits, correcting the problem.
Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
| hw/intc/xics_kvm.c | diffblobblamehistory | |
| include/hw/ppc/xics.h | diffblobblamehistory |