diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-12-19 15:05:46 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-02-15 16:54:34 +0300 |
| commit | 810e6defcca4d05275aa15c2872c0a4949178fcb (patch) | |
| tree | b01c9be27aee16a28a21b4fd9b4c635fc430fe65 /arch/x86/kvm/lapic.c | |
| parent | 0ad3bed6c5ec6dbb093a26802c85088a85fb9757 (diff) | |
| download | linux-810e6defcca4d05275aa15c2872c0a4949178fcb.tar.xz | |
KVM: x86: preparatory changes for APICv cleanups
Add return value to __kvm_apic_update_irr/kvm_apic_update_irr.
Move vmx_sync_pir_to_irr around.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 8ddd0ed03880..120afc2bcfd3 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -341,7 +341,7 @@ static int find_highest_vector(void *bitmap) vec >= 0; vec -= APIC_VECTORS_PER_REG) { reg = bitmap + REG_POS(vec); if (*reg) - return fls(*reg) - 1 + vec; + return __fls(*reg) + vec; } return -1; @@ -361,27 +361,36 @@ static u8 count_vectors(void *bitmap) return count; } -void __kvm_apic_update_irr(u32 *pir, void *regs) +int __kvm_apic_update_irr(u32 *pir, void *regs) { - u32 i, pir_val; + u32 i, vec; + u32 pir_val, irr_val; + int max_irr = -1; - for (i = 0; i <= 7; i++) { + for (i = vec = 0; i <= 7; i++, vec += 32) { pir_val = READ_ONCE(pir[i]); + irr_val = *((u32 *)(regs + APIC_IRR + i * 0x10)); if (pir_val) { - pir_val = xchg(&pir[i], 0); - *((u32 *)(regs + APIC_IRR + i * 0x10)) |= pir_val; + irr_val |= xchg(&pir[i], 0); + *((u32 *)(regs + APIC_IRR + i * 0x10)) = irr_val; } + if (irr_val) + max_irr = __fls(irr_val) + vec; } + + return max_irr; } EXPORT_SYMBOL_GPL(__kvm_apic_update_irr); -void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir) +int kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir) { struct kvm_lapic *apic = vcpu->arch.apic; + int max_irr; - __kvm_apic_update_irr(pir, apic->regs); + max_irr = __kvm_apic_update_irr(pir, apic->regs); kvm_make_request(KVM_REQ_EVENT, vcpu); + return max_irr; } EXPORT_SYMBOL_GPL(kvm_apic_update_irr); |