diff options
Diffstat (limited to 'arch/powerpc/include/uapi/asm/kvm_para.h')
| -rw-r--r-- | arch/powerpc/include/uapi/asm/kvm_para.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/arch/powerpc/include/uapi/asm/kvm_para.h b/arch/powerpc/include/uapi/asm/kvm_para.h new file mode 100644 index 00000000000..5e04383a1db --- /dev/null +++ b/arch/powerpc/include/uapi/asm/kvm_para.h @@ -0,0 +1,90 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright IBM Corp. 2008 + * + * Authors: Hollis Blanchard <hollisb@us.ibm.com> + */ + +#ifndef _UAPI__POWERPC_KVM_PARA_H__ +#define _UAPI__POWERPC_KVM_PARA_H__ + +#include <linux/types.h> + +/* + * Additions to this struct must only occur at the end, and should be + * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present + * (albeit not necessarily relevant to the current target hardware platform). + * + * Struct fields are always 32 or 64 bit aligned, depending on them being 32 + * or 64 bit wide respectively. + * + * See Documentation/virtual/kvm/ppc-pv.txt + */ +struct kvm_vcpu_arch_shared { + __u64 scratch1; + __u64 scratch2; + __u64 scratch3; + __u64 critical; /* Guest may not get interrupts if == r1 */ + __u64 sprg0; + __u64 sprg1; + __u64 sprg2; + __u64 sprg3; + __u64 srr0; + __u64 srr1; + __u64 dar; /* dear on BookE */ + __u64 msr; + __u32 dsisr; + __u32 int_pending; /* Tells the guest if we have an interrupt */ + __u32 sr[16]; + __u32 mas0; + __u32 mas1; + __u64 mas7_3; + __u64 mas2; + __u32 mas4; + __u32 mas6; + __u32 esr; + __u32 pir; + + /* + * SPRG4-7 are user-readable, so we can only keep these consistent + * between the shared area and the real registers when there's an + * intervening exit to KVM. This also applies to SPRG3 on some + * chips. + * + * This suffices for access by guest userspace, since in PR-mode + * KVM, an exit must occur when changing the guest's MSR[PR]. + * If the guest kernel writes to SPRG3-7 via the shared area, it + * must also use the shared area for reading while in kernel space. + */ + __u64 sprg4; + __u64 sprg5; + __u64 sprg6; + __u64 sprg7; +}; + +#define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */ +#define HC_VENDOR_KVM (42 << 16) +#define HC_EV_SUCCESS 0 +#define HC_EV_UNIMPLEMENTED 12 + +#define KVM_FEATURE_MAGIC_PAGE 1 + +#define KVM_MAGIC_FEAT_SR (1 << 0) + +/* MASn, ESR, PIR, and high SPRGs */ +#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1) + + +#endif /* _UAPI__POWERPC_KVM_PARA_H__ */ |