cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kvm_para.h (2793B)

      1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2/*
      3 * This program is free software; you can redistribute it and/or modify
      4 * it under the terms of the GNU General Public License, version 2, as
      5 * published by the Free Software Foundation.
      6 *
      7 * This program is distributed in the hope that it will be useful,
      8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
      9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     10 * GNU General Public License for more details.
     11 *
     12 * You should have received a copy of the GNU General Public License
     13 * along with this program; if not, write to the Free Software
     14 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
     15 *
     16 * Copyright IBM Corp. 2008
     17 *
     18 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
     19 */
     20
     21#ifndef _UAPI__POWERPC_KVM_PARA_H__
     22#define _UAPI__POWERPC_KVM_PARA_H__
     23
     24#include <linux/types.h>
     25
     26/*
     27 * Additions to this struct must only occur at the end, and should be
     28 * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
     29 * (albeit not necessarily relevant to the current target hardware platform).
     30 *
     31 * Struct fields are always 32 or 64 bit aligned, depending on them being 32
     32 * or 64 bit wide respectively.
     33 *
     34 * See Documentation/virt/kvm/ppc-pv.rst
     35 */
     36struct kvm_vcpu_arch_shared {
     37	__u64 scratch1;
     38	__u64 scratch2;
     39	__u64 scratch3;
     40	__u64 critical;		/* Guest may not get interrupts if == r1 */
     41	__u64 sprg0;
     42	__u64 sprg1;
     43	__u64 sprg2;
     44	__u64 sprg3;
     45	__u64 srr0;
     46	__u64 srr1;
     47	__u64 dar;		/* dear on BookE */
     48	__u64 msr;
     49	__u32 dsisr;
     50	__u32 int_pending;	/* Tells the guest if we have an interrupt */
     51	__u32 sr[16];
     52	__u32 mas0;
     53	__u32 mas1;
     54	__u64 mas7_3;
     55	__u64 mas2;
     56	__u32 mas4;
     57	__u32 mas6;
     58	__u32 esr;
     59	__u32 pir;
     60
     61	/*
     62	 * SPRG4-7 are user-readable, so we can only keep these consistent
     63	 * between the shared area and the real registers when there's an
     64	 * intervening exit to KVM.  This also applies to SPRG3 on some
     65	 * chips.
     66	 *
     67	 * This suffices for access by guest userspace, since in PR-mode
     68	 * KVM, an exit must occur when changing the guest's MSR[PR].
     69	 * If the guest kernel writes to SPRG3-7 via the shared area, it
     70	 * must also use the shared area for reading while in kernel space.
     71	 */
     72	__u64 sprg4;
     73	__u64 sprg5;
     74	__u64 sprg6;
     75	__u64 sprg7;
     76};
     77
     78#define KVM_SC_MAGIC_R0		0x4b564d21 /* "KVM!" */
     79
     80#define KVM_HCALL_TOKEN(num)     _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
     81
     82#include <asm/epapr_hcalls.h>
     83
     84#define KVM_FEATURE_MAGIC_PAGE	1
     85
     86/* Magic page flags from host to guest */
     87
     88#define KVM_MAGIC_FEAT_SR		(1 << 0)
     89
     90/* MASn, ESR, PIR, and high SPRGs */
     91#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7	(1 << 1)
     92
     93/* Magic page flags from guest to host */
     94
     95#define MAGIC_PAGE_FLAG_NOT_MAPPED_NX	(1 << 0)
     96
     97
     98#endif /* _UAPI__POWERPC_KVM_PARA_H__ */