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KVM: PPC: Add OSI hypercall interface

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MOL uses its own hypercall interface to call back into userspace when
the guest wants to do something.

So let's implement that as an exit reason, specify it with a CAP and
only really use it when userspace wants us to.

The only user of it so far is MOL.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf 2010-03-24 21:48:30 +01:00 • committed by Avi Kivity
commit ad0a048b09
6 changed files with 59 additions and 9 deletions
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6
include/linux/kvm.h
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@ -160,6 +160,7 @@ struct kvm_pit_config {
#define KVM_EXIT_DCR 15
#define KVM_EXIT_NMI 16
#define KVM_EXIT_INTERNAL_ERROR 17
#define KVM_EXIT_OSI 18
/* For KVM_EXIT_INTERNAL_ERROR */
#define KVM_INTERNAL_ERROR_EMULATION 1
@ -259,6 +260,10 @@ struct kvm_run {
__u32 ndata;
__u64 data[16];
} internal;
/* KVM_EXIT_OSI */
struct {
__u64 gprs[32];
} osi;
/* Fix the size of the union. */
char padding[256];
};
@ -516,6 +521,7 @@ struct kvm_enable_cap {
#define KVM_CAP_DEBUGREGS 50
#endif
#define KVM_CAP_X86_ROBUST_SINGLESTEP 51
#define KVM_CAP_PPC_OSI 52
#define KVM_CAP_PPC_UNSET_IRQ 53
#define KVM_CAP_ENABLE_CAP 54