diff options
Diffstat (limited to 'src/arch/x86/drivers/xen/hvm.h')
| -rw-r--r-- | src/arch/x86/drivers/xen/hvm.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/arch/x86/drivers/xen/hvm.h b/src/arch/x86/drivers/xen/hvm.h new file mode 100644 index 00000000..325d20d6 --- /dev/null +++ b/src/arch/x86/drivers/xen/hvm.h @@ -0,0 +1,75 @@ +#ifndef _HVM_H +#define _HVM_H + +/** @file + * + * Xen HVM driver + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#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 */ |