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authorScott Wood <scottwood@freescale.com>2013-04-12 14:08:47 +0000
committerAlexander Graf <agraf@suse.de>2013-04-26 20:27:24 +0200
commiteb1e4f43e0f47f2655372c7d32c43db9711c278e (patch)
treeac084d48a5590f6ca712242e0ca139abf57250a5 /arch/powerpc/kvm/powerpc.c
parent5df554ad5b7522ea62b0ff9d5be35183494efc21 (diff)
kvm/ppc/mpic: add KVM_CAP_IRQ_MPIC
Enabling this capability connects the vcpu to the designated in-kernel MPIC. Using explicit connections between vcpus and irqchips allows for flexibility, but the main benefit at the moment is that it simplifies the code -- KVM doesn't need vm-global state to remember which MPIC object is associated with this vm, and it doesn't need to care about ordering between irqchip creation and vcpu creation. Signed-off-by: Scott Wood <scottwood@freescale.com> [agraf: add stub functions for kvmppc_mpic_{dis,}connect_vcpu] Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/powerpc.c')
-rw-r--r--arch/powerpc/kvm/powerpc.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 88d69cf1f95..5d046bbdf11 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -25,6 +25,7 @@
#include <linux/hrtimer.h>
#include <linux/fs.h>
#include <linux/slab.h>
+#include <linux/file.h>
#include <asm/cputable.h>
#include <asm/uaccess.h>
#include <asm/kvm_ppc.h>
@@ -327,6 +328,9 @@ int kvm_dev_ioctl_check_extension(long ext)
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
case KVM_CAP_SW_TLB:
#endif
+#ifdef CONFIG_KVM_MPIC
+ case KVM_CAP_IRQ_MPIC:
+#endif
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
@@ -460,6 +464,13 @@ void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
tasklet_kill(&vcpu->arch.tasklet);
kvmppc_remove_vcpu_debugfs(vcpu);
+
+ switch (vcpu->arch.irq_type) {
+ case KVMPPC_IRQ_MPIC:
+ kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
+ break;
+ }
+
kvmppc_core_vcpu_free(vcpu);
}
@@ -787,6 +798,25 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
break;
}
#endif
+#ifdef CONFIG_KVM_MPIC
+ case KVM_CAP_IRQ_MPIC: {
+ struct file *filp;
+ struct kvm_device *dev;
+
+ r = -EBADF;
+ filp = fget(cap->args[0]);
+ if (!filp)
+ break;
+
+ r = -EPERM;
+ dev = kvm_device_from_filp(filp);
+ if (dev)
+ r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
+
+ fput(filp);
+ break;
+ }
+#endif
default:
r = -EINVAL;
break;