lwn.git/arch/x86/kvm/i8259.c, branch v4.1-rc4

Merge tag 'kvm-arm-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into 'kvm-next'

2015-04-07T16:09:20+00:00

KVM/ARM changes for v4.1: - fixes for live migration - irqfd support - kvm-io-bus & vgic rework to enable ioeventfd - page ageing for stage-2 translation - various cleanups

kvm: x86: i8259: return initialized data on invalid-size read

2015-03-30T14:40:07+00:00

If data is read from PIC with invalid access size, the return data stays uninitialized even though success is returned. Fix this by always initializing the data. Signed-off-by: Petr Matousek Reported-by: Nadav Amit Message-Id: <20150311111609.GG8544@dhcp-25-225.brq.redhat.com> Signed-off-by: Paolo Bonzini

KVM: Redesign kvm_io_bus_ API to pass VCPU structure to the callbacks.

2015-03-26T21:43:11+00:00

This is needed in e.g. ARM vGIC emulation, where the MMIO handling depends on the VCPU that does the access. Signed-off-by: Nikolay Nikolaev Signed-off-by: Andre Przywara Acked-by: Paolo Bonzini Acked-by: Christoffer Dall Reviewed-by: Marc Zyngier Signed-off-by: Marc Zyngier

KVM: inject ExtINT interrupt before APIC interrupts

2012-12-14T01:05:21+00:00

According to Intel SDM Volume 3 Section 10.8.1 "Interrupt Handling with the Pentium 4 and Intel Xeon Processors" and Section 10.8.2 "Interrupt Handling with the P6 Family and Pentium Processors" ExtINT interrupts are sent directly to the processor core for handling. Currently KVM checks APIC before it considers ExtINT interrupts for injection which is backwards from the spec. Make code behave according to the SDM. Signed-off-by: Gleb Natapov Acked-by: "Zhang, Yang Z" Signed-off-by: Marcelo Tosatti

KVM: cleanup pic reset

2012-09-04T11:53:51+00:00

kvm_pic_reset() is not used anywhere. Move reset logic from pic_ioport_write() there. Signed-off-by: Gleb Natapov Signed-off-by: Avi Kivity

KVM: x86: drop parameter validation in ioapic/pic

2012-08-15T01:35:22+00:00

We validate irq pin number when routing is setup, so code handling illegal irq # in pic and ioapic on each injection is never called. Drop it, replace with BUG_ON to catch out of bounds access bugs. Signed-off-by: Michael S. Tsirkin Signed-off-by: Marcelo Tosatti

KVM: PIC: call ack notifiers for irqs that are dropped form irr

2012-07-26T09:19:06+00:00

After commit 242ec97c358256 PIT interrupts are no longer delivered after PIC reset. It happens because PIT injects interrupt only if previous one was acked, but since on PIC reset it is dropped from irr it will never be delivered and hence acknowledged. Fix that by calling ack notifier on PIC reset. Signed-off-by: Gleb Natapov Signed-off-by: Avi Kivity

KVM: fix race with level interrupts

2012-07-20T19:12:00+00:00

When more than 1 source id is in use for the same GSI, we have the following race related to handling irq_states race: CPU 0 clears bit 0. CPU 0 read irq_state as 0. CPU 1 sets level to 1. CPU 1 calls kvm_ioapic_set_irq(1). CPU 0 calls kvm_ioapic_set_irq(0). Now ioapic thinks the level is 0 but irq_state is not 0. Fix by performing all irq_states bitmap handling under pic/ioapic lock. This also removes the need for atomics with irq_states handling. Reported-by: Gleb Natapov Signed-off-by: Michael S. Tsirkin Signed-off-by: Marcelo Tosatti

KVM: x86: reset edge sense circuit of i8259 on init

2012-03-05T12:57:30+00:00

The spec says that during initialization "The edge sense circuit is reset which means that following initialization an interrupt request (IR) input must make a low-to-high transition to generate an interrupt", but currently if edge triggered interrupt is in IRR it is delivered after i8259 initialization. Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity

KVM: drop bsp_vcpu pointer from kvm struct

2011-12-27T09:22:32+00:00

Drop bsp_vcpu pointer from kvm struct since its only use is incorrect anyway. Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti