mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-28 15:20:41 +00:00
3cf57fed21
The PIT injection logic is problematic under the following cases: 1) If there is a higher priority vector to be delivered by the time kvm_pit_timer_intr_post is invoked ps->inject_pending won't be set. This opens the possibility for missing many PIT event injections (say if guest executes hlt at this point). 2) ps->inject_pending is racy with more than two vcpus. Since there's no locking around read/dec of pt->pending, two vcpu's can inject two interrupts for a single pt->pending count. Fix 1 by using an irq ack notifier: only reinject when the previous irq has been acked. Fix 2 with appropriate locking around manipulation of pending count and irq_ack by the injection / ack paths. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com> |
||
---|---|---|
.. | ||
alpha | ||
arm | ||
avr32 | ||
blackfin | ||
cris | ||
frv | ||
h8300 | ||
ia64 | ||
m32r | ||
m68k | ||
m68knommu | ||
mips | ||
mn10300 | ||
parisc | ||
powerpc | ||
s390 | ||
sh | ||
sparc | ||
sparc64 | ||
um | ||
x86 | ||
xtensa | ||
.gitignore | ||
Kconfig |