On Thu, Jan 24, 2013 at 01:47:34PM +0000, Zhang, Yang Z wrote:
> Gleb Natapov wrote on 2013-01-24:
> > On Wed, Jan 23, 2013 at 10:47:26PM +0800, Yang Zhang wrote:
> >> From: Yang Zhang <[email protected]>
> >>
> >> Virtual interrupt delivery avoids KVM to inject vAPIC interrupts
> >> manually, which is fully taken care of by the hardware. This needs
> >> some special awareness into existing interrupr injection path:
> >>
> >> - for pending interrupt, instead of direct injection, we may need
> >> update architecture specific indicators before resuming to guest.
> >> - A pending interrupt, which is masked by ISR, should be also
> >> considered in above update action, since hardware will decide
> >> when to inject it at right time. Current has_interrupt and
> >> get_interrupt only returns a valid vector from injection p.o.v.
> >> Signed-off-by: Kevin Tian <[email protected]>
> >> Signed-off-by: Yang Zhang <[email protected]>
> >> ---
> >> arch/ia64/kvm/lapic.h | 6 ++
> >> arch/x86/include/asm/kvm_host.h | 7 ++ arch/x86/include/asm/vmx.h
> >> | 11 +++ arch/x86/kvm/irq.c | 56 +++++++++++++++--
> >> arch/x86/kvm/lapic.c | 106 ++++++++++++++++++++++++-------
> >> arch/x86/kvm/lapic.h | 27 ++++++++ arch/x86/kvm/svm.c
> >> | 31 +++++++++ arch/x86/kvm/vmx.c | 133
> >> ++++++++++++++++++++++++++++++++++++--- arch/x86/kvm/x86.c
> >> | 11 +++- include/linux/kvm_host.h | 3 +
> >> virt/kvm/ioapic.c | 39 +++++++++++ virt/kvm/ioapic.h
> >> | 4 + virt/kvm/irq_comm.c | 25 +++++++
> >> virt/kvm/kvm_main.c | 5 ++ 14 files changed, 425
> >> insertions(+), 39 deletions(-)
> >>
> >> +static void vmx_hwapic_vector_intercept_on_eoi(struct kvm_vcpu *vcpu,
> >> + u32 vector, u64 *eoi_exit_bitmap)
> >> +{
> >> + BUG_ON(vector > 255);
> >> + __set_bit(vector, (unsigned long *)eoi_exit_bitmap);
> >Nothing that warrants this to be vmx callback is here.
> >> +}
> >> +
> >> +static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64
> >> *eoi_exit_bitmap)
> >> +{
> >> + vmcs_write64(EOI_EXIT_BITMAP0, eoi_exit_bitmap[0]);
> >> + vmcs_write64(EOI_EXIT_BITMAP1, eoi_exit_bitmap[1]);
> >> + vmcs_write64(EOI_EXIT_BITMAP2, eoi_exit_bitmap[2]);
> >> + vmcs_write64(EOI_EXIT_BITMAP3, eoi_exit_bitmap[3]);
> >> +}
> >> +
> >> +static void vmx_update_eoi_exitmap(struct kvm_vcpu *vcpu)
> >> +{
> >> + u64 eoi_exit_bitmap[4];
> >> +
> >> + /* clear eoi exit bitmap */
> >> + memset(eoi_exit_bitmap, 0, 32);
> >> +
> >> + kvm_ioapic_calculate_eoi_exitmap(vcpu, eoi_exit_bitmap);
> >> + vmx_load_eoi_exitmap(vcpu, eoi_exit_bitmap);
> >> +}
> >Same as above. Why is this vmx callback?
> Why this callback is redundant? We can remove
> vmx_hwapic_vector_intercept_on_eoi, but this callback is necessary.
>
We try to put only necessary things in to the callback and generic
things into common code. vmx_load_eoi_exitmap() is the only thing that
is vmx specific, so make load_eoi_exitmap() callback please that does
just that.
--
Gleb.
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