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KVM: x86: Split the APIC from the rest of IRQCHIP.

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First patch in a series which enables the relocation of the
PIC/IOAPIC to userspace.

Adds capability KVM_CAP_SPLIT_IRQCHIP;

KVM_CAP_SPLIT_IRQCHIP enables the construction of LAPICs without the
rest of the irqchip.

Compile tested for x86.

Signed-off-by: Steve Rutherford <srutherford@google.com>
Suggested-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Steve Rutherford
2015-07-29 23:21:40 -07:00
committed by Paolo Bonzini
parent 4ca7dd8ce4
commit 49df6397ed
10 changed files with 75 additions and 7 deletions
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4
arch/x86/kvm/i8254.c
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@@ -35,6 +35,7 @@
#include <linux/kvm_host.h>
#include <linux/slab.h>
#include "ioapic.h"
#include "irq.h"
#include "i8254.h"
#include "x86.h"
@@ -333,7 +334,8 @@ static void create_pit_timer(struct kvm *kvm, u32 val, int is_period)
struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;
s64 interval;
if (!irqchip_in_kernel(kvm) || ps->flags & KVM_PIT_FLAGS_HPET_LEGACY)
if (!ioapic_in_kernel(kvm) ||
ps->flags & KVM_PIT_FLAGS_HPET_LEGACY)
return;
interval = muldiv64(val, NSEC_PER_SEC, KVM_PIT_FREQ);