This patchset changes interrupt injection to be done from normal process
context instead of interrupts disabled context. This is useful for real
mode interrupt injection on Intel without the current hacks (injecting as
a software interrupt of a vm86 task), reducing latencies, and later, for
allowing nested virtualization code to use kvm_read_guest()/kvm_write_guest()
instead of kmap() to access the guest vmcb/vmcs.
Seems to survive a hack that cancels every 16th entry, after injection has
already taken place.
Note: not yet ready, hangs fairly early on AMD. Seems to work well on Intel.
Please review carefully, esp. the first patch. Any missing kvm_make_request()
there may result in a hung guest.
v3: close new race between injection and entry
fix Intel real-mode injection cancellation
v2: svm support (easier than expected)
fix silly vmx warning
Avi Kivity (6):
KVM: Check for pending events before attempting injection
KVM: VMX: Split up vmx_complete_interrupts()
KVM: VMX: Move real-mode interrupt injection fixup to
vmx_complete_interrupts()
KVM: VMX: Parameterize vmx_complete_interrupts() for both exit and
entry
KVM: Non-atomic interrupt injection
KVM: VMX: Move fixup_rmode_irq() to avoid forward declaration
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/i8259.c | 1 +
arch/x86/kvm/lapic.c | 12 +++-
arch/x86/kvm/svm.c | 20 ++++++-
arch/x86/kvm/vmx.c | 116 ++++++++++++++++++++++++++------------
arch/x86/kvm/x86.c | 44 ++++++++++----
include/linux/kvm_host.h | 1 +
7 files changed, 142 insertions(+), 53 deletions(-)
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