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#ifndef _HVM_H
#define _HVM_H
/** @file
*
* Xen HVM driver
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
#include <ipxe/xen.h>
#include <xen/hvm/hvm_op.h>
#include <xen/hvm/params.h>
/** Minimum CPUID base */
#define HVM_CPUID_MIN 0x40000000UL
/** Maximum CPUID base */
#define HVM_CPUID_MAX 0x4000ff00UL
/** Increment between CPUID bases */
#define HVM_CPUID_STEP 0x00000100UL
/** Magic signature */
#define HVM_CPUID_MAGIC "XenVMMXenVMM"
/** Get Xen version */
#define HVM_CPUID_VERSION 1
/** Get number of hypercall pages */
#define HVM_CPUID_PAGES 2
/** PCI MMIO BAR */
#define HVM_MMIO_BAR PCI_BASE_ADDRESS_1
/** A Xen HVM device */
struct hvm_device {
/** Xen hypervisor */
struct xen_hypervisor xen;
/** CPUID base */
uint32_t cpuid_base;
/** Length of hypercall table */
size_t hypercall_len;
/** MMIO base address */
unsigned long mmio;
/** Current offset within MMIO address space */
size_t mmio_offset;
/** Length of MMIO address space */
size_t mmio_len;
};
/**
* Get HVM parameter value
*
* @v xen Xen hypervisor
* @v index Parameter index
* @v value Value to fill in
* @ret xenrc Xen status code
*/
static inline int xen_hvm_get_param ( struct xen_hypervisor *xen,
unsigned int index, uint64_t *value ) {
struct xen_hvm_param param;
int xenrc;
param.domid = DOMID_SELF;
param.index = index;
xenrc = xen_hypercall_2 ( xen, __HYPERVISOR_hvm_op, HVMOP_get_param,
virt_to_phys ( ¶m ) );
*value = param.value;
return xenrc;
}
#endif /* _HVM_H */
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