/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright IBM Corp. 2008
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#ifndef _UAPI__POWERPC_KVM_PARA_H__
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#define _UAPI__POWERPC_KVM_PARA_H__
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#include <linux/types.h>
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/*
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* Additions to this struct must only occur at the end, and should be
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* accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
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* (albeit not necessarily relevant to the current target hardware platform).
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*
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* Struct fields are always 32 or 64 bit aligned, depending on them being 32
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* or 64 bit wide respectively.
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*
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* See Documentation/virt/kvm/ppc-pv.rst
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*/
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struct kvm_vcpu_arch_shared {
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__u64 scratch1;
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__u64 scratch2;
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__u64 scratch3;
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__u64 critical; /* Guest may not get interrupts if == r1 */
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__u64 sprg0;
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__u64 sprg1;
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__u64 sprg2;
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__u64 sprg3;
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__u64 srr0;
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__u64 srr1;
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__u64 dar; /* dear on BookE */
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__u64 msr;
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__u32 dsisr;
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__u32 int_pending; /* Tells the guest if we have an interrupt */
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__u32 sr[16];
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__u32 mas0;
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__u32 mas1;
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__u64 mas7_3;
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__u64 mas2;
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__u32 mas4;
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__u32 mas6;
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__u32 esr;
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__u32 pir;
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/*
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* SPRG4-7 are user-readable, so we can only keep these consistent
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* between the shared area and the real registers when there's an
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* intervening exit to KVM. This also applies to SPRG3 on some
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* chips.
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*
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* This suffices for access by guest userspace, since in PR-mode
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* KVM, an exit must occur when changing the guest's MSR[PR].
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* If the guest kernel writes to SPRG3-7 via the shared area, it
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* must also use the shared area for reading while in kernel space.
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*/
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__u64 sprg4;
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__u64 sprg5;
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__u64 sprg6;
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__u64 sprg7;
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};
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#define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */
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#define KVM_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
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#include <asm/epapr_hcalls.h>
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#define KVM_FEATURE_MAGIC_PAGE 1
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/* Magic page flags from host to guest */
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#define KVM_MAGIC_FEAT_SR (1 << 0)
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/* MASn, ESR, PIR, and high SPRGs */
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#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1)
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/* Magic page flags from guest to host */
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#define MAGIC_PAGE_FLAG_NOT_MAPPED_NX (1 << 0)
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#endif /* _UAPI__POWERPC_KVM_PARA_H__ */
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