mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 04:05:18 +07:00
38e20b07ef
Set the callback to receive evtchns from Xen, using the callback vector delivery mechanism. The traditional way for receiving event channel notifications from Xen is via the interrupts from the platform PCI device. The callback vector is a newer alternative that allow us to receive notifications on any vcpu and doesn't need any PCI support: we allocate a vector exclusively to receive events, in the vector handler we don't need to interact with the vlapic, therefore we avoid a VMEXIT. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/******************************************************************************
|
|
* features.h
|
|
*
|
|
* Feature flags, reported by XENVER_get_features.
|
|
*
|
|
* Copyright (c) 2006, Keir Fraser <keir@xensource.com>
|
|
*/
|
|
|
|
#ifndef __XEN_PUBLIC_FEATURES_H__
|
|
#define __XEN_PUBLIC_FEATURES_H__
|
|
|
|
/*
|
|
* If set, the guest does not need to write-protect its pagetables, and can
|
|
* update them via direct writes.
|
|
*/
|
|
#define XENFEAT_writable_page_tables 0
|
|
|
|
/*
|
|
* If set, the guest does not need to write-protect its segment descriptor
|
|
* tables, and can update them via direct writes.
|
|
*/
|
|
#define XENFEAT_writable_descriptor_tables 1
|
|
|
|
/*
|
|
* If set, translation between the guest's 'pseudo-physical' address space
|
|
* and the host's machine address space are handled by the hypervisor. In this
|
|
* mode the guest does not need to perform phys-to/from-machine translations
|
|
* when performing page table operations.
|
|
*/
|
|
#define XENFEAT_auto_translated_physmap 2
|
|
|
|
/* If set, the guest is running in supervisor mode (e.g., x86 ring 0). */
|
|
#define XENFEAT_supervisor_mode_kernel 3
|
|
|
|
/*
|
|
* If set, the guest does not need to allocate x86 PAE page directories
|
|
* below 4GB. This flag is usually implied by auto_translated_physmap.
|
|
*/
|
|
#define XENFEAT_pae_pgdir_above_4gb 4
|
|
|
|
/* x86: Does this Xen host support the MMU_PT_UPDATE_PRESERVE_AD hypercall? */
|
|
#define XENFEAT_mmu_pt_update_preserve_ad 5
|
|
|
|
/* x86: Does this Xen host support the HVM callback vector type? */
|
|
#define XENFEAT_hvm_callback_vector 8
|
|
|
|
#define XENFEAT_NR_SUBMAPS 1
|
|
|
|
#endif /* __XEN_PUBLIC_FEATURES_H__ */
|