mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 14:16:41 +07:00
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
#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
|