diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm.h | 50 | ||||
| -rw-r--r-- | include/linux/kvm_para.h | 73 | ||||
| -rw-r--r-- | include/linux/magic.h | 1 |
3 files changed, 101 insertions, 23 deletions
diff --git a/include/linux/kvm.h b/include/linux/kvm.h index f3604593fb7..275354ffa1c 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -11,7 +11,7 @@ #include <asm/types.h> #include <linux/ioctl.h> -#define KVM_API_VERSION 3 +#define KVM_API_VERSION 4 /* * Architectural interrupt line count, and the size of the bitmap needed @@ -52,11 +52,10 @@ enum kvm_exit_reason { /* for KVM_RUN */ struct kvm_run { /* in */ - __u32 vcpu; __u32 emulated; /* skip current instruction */ __u32 mmio_completed; /* mmio request completed */ __u8 request_interrupt_window; - __u8 padding1[3]; + __u8 padding1[7]; /* out */ __u32 exit_type; @@ -111,10 +110,6 @@ struct kvm_run { /* for KVM_GET_REGS and KVM_SET_REGS */ struct kvm_regs { - /* in */ - __u32 vcpu; - __u32 padding; - /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */ __u64 rax, rbx, rcx, rdx; __u64 rsi, rdi, rsp, rbp; @@ -141,10 +136,6 @@ struct kvm_dtable { /* for KVM_GET_SREGS and KVM_SET_SREGS */ struct kvm_sregs { - /* in */ - __u32 vcpu; - __u32 padding; - /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */ struct kvm_segment cs, ds, es, fs, gs, ss; struct kvm_segment tr, ldt; @@ -163,8 +154,8 @@ struct kvm_msr_entry { /* for KVM_GET_MSRS and KVM_SET_MSRS */ struct kvm_msrs { - __u32 vcpu; __u32 nmsrs; /* number of msrs in entries */ + __u32 pad; struct kvm_msr_entry entries[0]; }; @@ -179,8 +170,6 @@ struct kvm_msr_list { struct kvm_translation { /* in */ __u64 linear_address; - __u32 vcpu; - __u32 padding; /* out */ __u64 physical_address; @@ -193,7 +182,6 @@ struct kvm_translation { /* for KVM_INTERRUPT */ struct kvm_interrupt { /* in */ - __u32 vcpu; __u32 irq; }; @@ -206,8 +194,8 @@ struct kvm_breakpoint { /* for KVM_DEBUG_GUEST */ struct kvm_debug_guest { /* int */ - __u32 vcpu; __u32 enabled; + __u32 pad; struct kvm_breakpoint breakpoints[4]; __u32 singlestep; }; @@ -224,20 +212,36 @@ struct kvm_dirty_log { #define KVMIO 0xAE +/* + * ioctls for /dev/kvm fds: + */ #define KVM_GET_API_VERSION _IO(KVMIO, 1) +#define KVM_CREATE_VM _IO(KVMIO, 2) /* returns a VM fd */ +#define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 15, struct kvm_msr_list) + +/* + * ioctls for VM fds + */ +#define KVM_SET_MEMORY_REGION _IOW(KVMIO, 10, struct kvm_memory_region) +/* + * KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns + * a vcpu fd. + */ +#define KVM_CREATE_VCPU _IOW(KVMIO, 11, int) +#define KVM_GET_DIRTY_LOG _IOW(KVMIO, 12, struct kvm_dirty_log) + +/* + * ioctls for vcpu fds + */ #define KVM_RUN _IOWR(KVMIO, 2, struct kvm_run) -#define KVM_GET_REGS _IOWR(KVMIO, 3, struct kvm_regs) +#define KVM_GET_REGS _IOR(KVMIO, 3, struct kvm_regs) #define KVM_SET_REGS _IOW(KVMIO, 4, struct kvm_regs) -#define KVM_GET_SREGS _IOWR(KVMIO, 5, struct kvm_sregs) +#define KVM_GET_SREGS _IOR(KVMIO, 5, struct kvm_sregs) #define KVM_SET_SREGS _IOW(KVMIO, 6, struct kvm_sregs) #define KVM_TRANSLATE _IOWR(KVMIO, 7, struct kvm_translation) #define KVM_INTERRUPT _IOW(KVMIO, 8, struct kvm_interrupt) #define KVM_DEBUG_GUEST _IOW(KVMIO, 9, struct kvm_debug_guest) -#define KVM_SET_MEMORY_REGION _IOW(KVMIO, 10, struct kvm_memory_region) -#define KVM_CREATE_VCPU _IOW(KVMIO, 11, int /* vcpu_slot */) -#define KVM_GET_DIRTY_LOG _IOW(KVMIO, 12, struct kvm_dirty_log) #define KVM_GET_MSRS _IOWR(KVMIO, 13, struct kvm_msrs) -#define KVM_SET_MSRS _IOWR(KVMIO, 14, struct kvm_msrs) -#define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 15, struct kvm_msr_list) +#define KVM_SET_MSRS _IOW(KVMIO, 14, struct kvm_msrs) #endif diff --git a/include/linux/kvm_para.h b/include/linux/kvm_para.h new file mode 100644 index 00000000000..3b292565a69 --- /dev/null +++ b/include/linux/kvm_para.h @@ -0,0 +1,73 @@ +#ifndef __LINUX_KVM_PARA_H +#define __LINUX_KVM_PARA_H + +/* + * Guest OS interface for KVM paravirtualization + * + * Note: this interface is totally experimental, and is certain to change + * as we make progress. + */ + +/* + * Per-VCPU descriptor area shared between guest and host. Writable to + * both guest and host. Registered with the host by the guest when + * a guest acknowledges paravirtual mode. + * + * NOTE: all addresses are guest-physical addresses (gpa), to make it + * easier for the hypervisor to map between the various addresses. + */ +struct kvm_vcpu_para_state { + /* + * API version information for compatibility. If there's any support + * mismatch (too old host trying to execute too new guest) then + * the host will deny entry into paravirtual mode. Any other + * combination (new host + old guest and new host + new guest) + * is supposed to work - new host versions will support all old + * guest API versions. + */ + u32 guest_version; + u32 host_version; + u32 size; + u32 ret; + + /* + * The address of the vm exit instruction (VMCALL or VMMCALL), + * which the host will patch according to the CPU model the + * VM runs on: + */ + u64 hypercall_gpa; + +} __attribute__ ((aligned(PAGE_SIZE))); + +#define KVM_PARA_API_VERSION 1 + +/* + * This is used for an RDMSR's ECX parameter to probe for a KVM host. + * Hopefully no CPU vendor will use up this number. This is placed well + * out of way of the typical space occupied by CPU vendors' MSR indices, + * and we think (or at least hope) it wont be occupied in the future + * either. + */ +#define MSR_KVM_API_MAGIC 0x87655678 + +#define KVM_EINVAL 1 + +/* + * Hypercall calling convention: + * + * Each hypercall may have 0-6 parameters. + * + * 64-bit hypercall index is in RAX, goes from 0 to __NR_hypercalls-1 + * + * 64-bit parameters 1-6 are in the standard gcc x86_64 calling convention + * order: RDI, RSI, RDX, RCX, R8, R9. + * + * 32-bit index is EBX, parameters are: EAX, ECX, EDX, ESI, EDI, EBP. + * (the first 3 are according to the gcc regparm calling convention) + * + * No registers are clobbered by the hypercall, except that the + * return value is in RAX. + */ +#define __NR_hypercalls 0 + +#endif diff --git a/include/linux/magic.h b/include/linux/magic.h index b32c8a97fce..a9c6567fe70 100644 --- a/include/linux/magic.h +++ b/include/linux/magic.h @@ -13,6 +13,7 @@ #define HPFS_SUPER_MAGIC 0xf995e849 #define ISOFS_SUPER_MAGIC 0x9660 #define JFFS2_SUPER_MAGIC 0x72b6 +#define KVMFS_SUPER_MAGIC 0x19700426 #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */ #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */ |