linux.git/include/trace/events/kvm.h, branch v3.19

KVM: fix sparse warning in include/trace/events/kvm.h

2015-01-19T10:07:57+00:00

sparse complains about
include/trace/events/kvm.h:163:1: error: directive in argument list
include/trace/events/kvm.h:167:1: error: directive in argument list
include/trace/events/kvm.h:169:1: error: directive in argument list
and sparse is right. Preprocessing directives in an argument of a
macro are undefined behaviour as of C99 6.10.3p11.

Lets use an indirection to fix this.

Signed-off-by: Christian Borntraeger 
Signed-off-by: Paolo Bonzini

kvm/x86/mmu: Pass gfn and level to rmapp callback.

2014-09-24T12:07:57+00:00

Callbacks don't have to do extra computation to learn what the caller
(lvm_handle_hva_range()) knows very well. Useful for
debugging/tracing/printk/future.

Signed-off-by: Andres Lagar-Cavilla 
Signed-off-by: Paolo Bonzini

kvm: ioapic: conditionally delay irq delivery duringeoi broadcast

2014-09-16T12:44:48+00:00

Currently, we call ioapic_service() immediately when we find the irq is still
active during eoi broadcast. But for real hardware, there's some delay between
the EOI writing and irq delivery.  If we do not emulate this behavior, and
re-inject the interrupt immediately after the guest sends an EOI and re-enables
interrupts, a guest might spend all its time in the ISR if it has a broken
handler for a level-triggered interrupt.

Such livelock actually happens with Windows guests when resuming from
hibernation.

As there's no way to recognize the broken handle from new raised ones, this patch
delays an interrupt if 10.000 consecutive EOIs found that the interrupt was
still high.  The guest can then make a little forward progress, until a proper
IRQ handler is set or until some detection routine in the guest (such as
Linux's note_interrupt()) recognizes the situation.

Cc: Michael S. Tsirkin 
Signed-off-by: Jason Wang 
Signed-off-by: Zhang Haoyu 
Signed-off-by: Paolo Bonzini

KVM: Move more code under CONFIG_HAVE_KVM_IRQFD

2014-08-06T12:24:47+00:00

Commits e4d57e1ee1ab (KVM: Move irq notifier implementation into
eventfd.c, 2014-06-30) included the irq notifier code unconditionally
in eventfd.c, while it was under CONFIG_HAVE_KVM_IRQCHIP before.

Similarly, commit 297e21053a52 (KVM: Give IRQFD its own separate enabling
Kconfig option, 2014-06-30) moved code from CONFIG_HAVE_IRQ_ROUTING
to CONFIG_HAVE_KVM_IRQFD but forgot to move the pieces that used to be
under CONFIG_HAVE_KVM_IRQCHIP.

Together, this broke compilation without CONFIG_KVM_XICS.  Fix by adding
or changing the #ifdefs so that they point at CONFIG_HAVE_KVM_IRQFD.

Signed-off-by: Paolo Bonzini

KVM: Drop FOLL_GET in GUP when doing async page fault

2013-10-15T10:43:37+00:00

Page pinning is not mandatory in kvm async page fault processing since
after async page fault event is delivered to a guest it accesses page once
again and does its own GUP.  Drop the FOLL_GET flag in GUP in async_pf
code, and do some simplifying in check/clear processing.

Suggested-by: Gleb Natapov 
Signed-off-by: Gu zheng 
Signed-off-by: chai wen 
Signed-off-by: Gleb Natapov

KVM: Extract generic irqchip logic into irqchip.c

2013-04-26T18:27:17+00:00

The current irq_comm.c file contains pieces of code that are generic
across different irqchip implementations, as well as code that is
fully IOAPIC specific.

Split the generic bits out into irqchip.c.

Signed-off-by: Alexander Graf 
Acked-by: Michael S. Tsirkin

KVM: trace: Fix exit decoding.

2013-01-10T17:51:11+00:00

trace_kvm_userspace_exit has been missing the KVM_EXIT_WATCHDOG exit.

CC: Bharat Bhushan 
Signed-off-by: Cornelia Huck 
Signed-off-by: Marcelo Tosatti

KVM: s390: Add support for channel I/O instructions.

2013-01-07T21:53:43+00:00

Add a new capability, KVM_CAP_S390_CSS_SUPPORT, which will pass
intercepts for channel I/O instructions to userspace. Only I/O
instructions interacting with I/O interrupts need to be handled
in-kernel:

- TEST PENDING INTERRUPTION (tpi) dequeues and stores pending
  interrupts entirely in-kernel.
- TEST SUBCHANNEL (tsch) dequeues pending interrupts in-kernel
  and exits via KVM_EXIT_S390_TSCH to userspace for subchannel-
  related processing.

Reviewed-by: Marcelo Tosatti 
Reviewed-by: Alexander Graf 
Signed-off-by: Cornelia Huck 
Signed-off-by: Marcelo Tosatti

KVM: Introduce __KVM_HAVE_IRQ_LINE

2012-06-18T13:06:35+00:00

This is a preparatory patch for the KVM/ARM implementation. KVM/ARM will use
the KVM_IRQ_LINE ioctl, which is currently conditional on
__KVM_HAVE_IOAPIC, but ARM obviously doesn't have any IOAPIC support and we
need a separate define.

Signed-off-by: Christoffer Dall 
Signed-off-by: Avi Kivity

KVM: trace events: update list of exit reasons

2012-06-13T23:53:46+00:00

The list of exit reasons for the kvm_userspace_exit event was
missing recent additions; bring it into sync again.

Reviewed-by: Christian Borntraeger 
Signed-off-by: Cornelia Huck 
Signed-off-by: Marcelo Tosatti