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fad93fe1d4
While running in hooked code we need to store register contents out because we must not clobber any registers. So let's add some fields to the shared page we can just happily write to. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
168 lines
3.4 KiB
C
168 lines
3.4 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright IBM Corp. 2008
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#ifndef __POWERPC_KVM_PARA_H__
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#define __POWERPC_KVM_PARA_H__
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#include <linux/types.h>
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#include <linux/of.h>
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struct kvm_vcpu_arch_shared {
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__u64 scratch1;
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__u64 scratch2;
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__u64 scratch3;
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__u64 critical; /* Guest may not get interrupts if == r1 */
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__u64 sprg0;
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__u64 sprg1;
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__u64 sprg2;
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__u64 sprg3;
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__u64 srr0;
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__u64 srr1;
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__u64 dar;
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__u64 msr;
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__u32 dsisr;
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};
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#define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */
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#define HC_VENDOR_KVM (42 << 16)
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#define HC_EV_SUCCESS 0
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#define HC_EV_UNIMPLEMENTED 12
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#ifdef __KERNEL__
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#ifdef CONFIG_KVM_GUEST
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static inline int kvm_para_available(void)
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{
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struct device_node *hyper_node;
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hyper_node = of_find_node_by_path("/hypervisor");
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if (!hyper_node)
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return 0;
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if (!of_device_is_compatible(hyper_node, "linux,kvm"))
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return 0;
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return 1;
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}
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extern unsigned long kvm_hypercall(unsigned long *in,
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unsigned long *out,
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unsigned long nr);
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#else
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static inline int kvm_para_available(void)
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{
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return 0;
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}
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static unsigned long kvm_hypercall(unsigned long *in,
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unsigned long *out,
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unsigned long nr)
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{
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return HC_EV_UNIMPLEMENTED;
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}
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#endif
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static inline long kvm_hypercall0_1(unsigned int nr, unsigned long *r2)
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{
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unsigned long in[8];
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unsigned long out[8];
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unsigned long r;
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r = kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
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*r2 = out[0];
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return r;
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}
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static inline long kvm_hypercall0(unsigned int nr)
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{
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unsigned long in[8];
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unsigned long out[8];
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return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
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}
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static inline long kvm_hypercall1(unsigned int nr, unsigned long p1)
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{
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unsigned long in[8];
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unsigned long out[8];
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in[0] = p1;
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return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
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}
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static inline long kvm_hypercall2(unsigned int nr, unsigned long p1,
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unsigned long p2)
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{
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unsigned long in[8];
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unsigned long out[8];
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in[0] = p1;
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in[1] = p2;
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return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
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}
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static inline long kvm_hypercall3(unsigned int nr, unsigned long p1,
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unsigned long p2, unsigned long p3)
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{
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unsigned long in[8];
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unsigned long out[8];
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in[0] = p1;
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in[1] = p2;
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in[2] = p3;
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return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
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}
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static inline long kvm_hypercall4(unsigned int nr, unsigned long p1,
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unsigned long p2, unsigned long p3,
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unsigned long p4)
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{
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unsigned long in[8];
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unsigned long out[8];
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in[0] = p1;
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in[1] = p2;
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in[2] = p3;
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in[3] = p4;
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return kvm_hypercall(in, out, nr | HC_VENDOR_KVM);
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}
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static inline unsigned int kvm_arch_para_features(void)
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{
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unsigned long r;
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if (!kvm_para_available())
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return 0;
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if(kvm_hypercall0_1(KVM_HC_FEATURES, &r))
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return 0;
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return r;
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}
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#endif /* __KERNEL__ */
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#endif /* __POWERPC_KVM_PARA_H__ */
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