From b4e63f560beb187cffdaf706e534a1e2f9effb66 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Sun, 4 Mar 2007 13:59:30 +0200 Subject: KVM: Allow userspace to process hypercalls which have no kernel handler This is useful for paravirtualized graphics devices, for example. Signed-off-by: Avi Kivity --- drivers/kvm/kvm_main.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'drivers/kvm') diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 39cf8fd343a3..de93117f1e97 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -1203,7 +1203,16 @@ int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run) } switch (nr) { default: - ; + run->hypercall.args[0] = a0; + run->hypercall.args[1] = a1; + run->hypercall.args[2] = a2; + run->hypercall.args[3] = a3; + run->hypercall.args[4] = a4; + run->hypercall.args[5] = a5; + run->hypercall.ret = ret; + run->hypercall.longmode = is_long_mode(vcpu); + kvm_arch_ops->decache_regs(vcpu); + return 0; } vcpu->regs[VCPU_REGS_RAX] = ret; kvm_arch_ops->decache_regs(vcpu); @@ -1599,6 +1608,13 @@ static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) vcpu->mmio_needed = 0; + if (kvm_run->exit_type == KVM_EXIT_TYPE_VM_EXIT + && kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { + kvm_arch_ops->cache_regs(vcpu); + vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; + kvm_arch_ops->decache_regs(vcpu); + } + r = kvm_arch_ops->run(vcpu, kvm_run); vcpu_put(vcpu); -- cgit v1.2.1