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| author | Eric Auger <eric.auger@redhat.com> | 2019-10-03 17:46:39 +0200 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-10-15 18:09:02 +0100 |
| commit | f6530926e2310147a7844a3e663230d47b3d7333 (patch) | |
| tree | 72d1cedab2f00fff2f123803499c2b72ede04745 /target/arm | |
| parent | f363d039e883ce6eb2a4fd09b04a38cbb6c95d43 (diff) | |
| download | qemu-f6530926e2310147a7844a3e663230d47b3d7333.zip qemu-f6530926e2310147a7844a3e663230d47b3d7333.tar.gz qemu-f6530926e2310147a7844a3e663230d47b3d7333.tar.bz2 | |
intc/arm_gic: Support IRQ injection for more than 256 vpus
Host kernels that expose the KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 capability
allow injection of interrupts along with vcpu ids larger than 255.
Let's encode the vpcu id on 12 bits according to the upgraded KVM_IRQ_LINE
ABI when needed.
Given that we have two callsites that need to assemble
the value for kvm_set_irq(), a new helper routine, kvm_arm_set_irq
is introduced.
Without that patch qemu exits with "kvm_set_irq: Invalid argument"
message.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reported-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Message-id: 20191003154640.22451-3-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm')
| -rw-r--r-- | target/arm/cpu.c | 10 | ||||
| -rw-r--r-- | target/arm/kvm.c | 12 | ||||
| -rw-r--r-- | target/arm/kvm_arm.h | 1 |
3 files changed, 17 insertions, 6 deletions
diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 2399c14..13813fb 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -576,16 +576,16 @@ static void arm_cpu_kvm_set_irq(void *opaque, int irq, int level) ARMCPU *cpu = opaque; CPUARMState *env = &cpu->env; CPUState *cs = CPU(cpu); - int kvm_irq = KVM_ARM_IRQ_TYPE_CPU << KVM_ARM_IRQ_TYPE_SHIFT; uint32_t linestate_bit; + int irq_id; switch (irq) { case ARM_CPU_IRQ: - kvm_irq |= KVM_ARM_IRQ_CPU_IRQ; + irq_id = KVM_ARM_IRQ_CPU_IRQ; linestate_bit = CPU_INTERRUPT_HARD; break; case ARM_CPU_FIQ: - kvm_irq |= KVM_ARM_IRQ_CPU_FIQ; + irq_id = KVM_ARM_IRQ_CPU_FIQ; linestate_bit = CPU_INTERRUPT_FIQ; break; default: @@ -597,9 +597,7 @@ static void arm_cpu_kvm_set_irq(void *opaque, int irq, int level) } else { env->irq_line_state &= ~linestate_bit; } - - kvm_irq |= cs->cpu_index << KVM_ARM_IRQ_VCPU_SHIFT; - kvm_set_irq(kvm_state, kvm_irq, level ? 1 : 0); + kvm_arm_set_irq(cs->cpu_index, KVM_ARM_IRQ_TYPE_CPU, irq_id, !!level); #endif } diff --git a/target/arm/kvm.c b/target/arm/kvm.c index b2eaa50..b10581f 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -744,6 +744,18 @@ int kvm_arm_vgic_probe(void) } } +int kvm_arm_set_irq(int cpu, int irqtype, int irq, int level) +{ + int kvm_irq = (irqtype << KVM_ARM_IRQ_TYPE_SHIFT) | irq; + int cpu_idx1 = cpu % 256; + int cpu_idx2 = cpu / 256; + + kvm_irq |= (cpu_idx1 << KVM_ARM_IRQ_VCPU_SHIFT) | + (cpu_idx2 << KVM_ARM_IRQ_VCPU2_SHIFT); + + return kvm_set_irq(kvm_state, kvm_irq, !!level); +} + int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, uint64_t address, uint32_t data, PCIDevice *dev) { diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h index b3106c8..b4e1945 100644 --- a/target/arm/kvm_arm.h +++ b/target/arm/kvm_arm.h @@ -253,6 +253,7 @@ int kvm_arm_vgic_probe(void); void kvm_arm_pmu_set_irq(CPUState *cs, int irq); void kvm_arm_pmu_init(CPUState *cs); +int kvm_arm_set_irq(int cpu, int irqtype, int irq, int level); #else |