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KVM: PPC: Add get_pvinfo interface to query hypercall instructions

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We need to tell the guest the opcodes that make up a hypercall through
interfaces that are controlled by userspace. So we need to add a call
for userspace to allow it to query those opcodes so it can pass them
on.

This is required because the hypercall opcodes can change based on
the hypervisor conditions. If we're running in hardware accelerated
hypervisor mode, a hypercall looks different from when we're running
without hardware acceleration.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf
2010-07-29 14:48:08 +02:00
committed by Avi Kivity
parent d7d3c2ea99
commit 15711e9c92
3 changed files with 72 additions and 0 deletions
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11
include/linux/kvm.h
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@@ -414,6 +414,14 @@ struct kvm_enable_cap {
__u8 pad[64];
};
/* for KVM_PPC_GET_PVINFO */
struct kvm_ppc_pvinfo {
/* out */
__u32 flags;
__u32 hcall[4];
__u8 pad[108];
};
#define KVMIO 0xAE
/*
@@ -530,6 +538,7 @@ struct kvm_enable_cap {
#ifdef __KVM_HAVE_XCRS
#define KVM_CAP_XCRS 56
#endif
#define KVM_CAP_PPC_GET_PVINFO 57
#ifdef KVM_CAP_IRQ_ROUTING
@@ -664,6 +673,8 @@ struct kvm_clock_data {
/* Available with KVM_CAP_PIT_STATE2 */
#define KVM_GET_PIT2 _IOR(KVMIO, 0x9f, struct kvm_pit_state2)
#define KVM_SET_PIT2 _IOW(KVMIO, 0xa0, struct kvm_pit_state2)
/* Available with KVM_CAP_PPC_GET_PVINFO */
#define KVM_PPC_GET_PVINFO _IOW(KVMIO, 0xa1, struct kvm_ppc_pvinfo)
/*
* ioctls for vcpu fds