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| 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
|---|---|
| 2 | /* |
| 3 | * Copyright IBM Corp. 2008 |
| 4 | * |
| 5 | * Authors: Hollis Blanchard <hollisb@us.ibm.com> |
| 6 | */ |
| 7 | |
| 8 | #ifndef _UAPI__POWERPC_KVM_PARA_H__ |
| 9 | #define _UAPI__POWERPC_KVM_PARA_H__ |
| 10 | |
| 11 | #include <linux/types.h> |
| 12 | |
| 13 | /* |
| 14 | * Additions to this struct must only occur at the end, and should be |
| 15 | * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present |
| 16 | * (albeit not necessarily relevant to the current target hardware platform). |
| 17 | * |
| 18 | * Struct fields are always 32 or 64 bit aligned, depending on them being 32 |
| 19 | * or 64 bit wide respectively. |
| 20 | * |
| 21 | * See Documentation/virt/kvm/ppc-pv.rst |
| 22 | */ |
| 23 | struct kvm_vcpu_arch_shared { |
| 24 | __u64 scratch1; |
| 25 | __u64 scratch2; |
| 26 | __u64 scratch3; |
| 27 | __u64 critical; /* Guest may not get interrupts if == r1 */ |
| 28 | __u64 sprg0; |
| 29 | __u64 sprg1; |
| 30 | __u64 sprg2; |
| 31 | __u64 sprg3; |
| 32 | __u64 srr0; |
| 33 | __u64 srr1; |
| 34 | __u64 dar; /* dear on BookE */ |
| 35 | __u64 msr; |
| 36 | __u32 dsisr; |
| 37 | __u32 int_pending; /* Tells the guest if we have an interrupt */ |
| 38 | __u32 sr[16]; |
| 39 | __u32 mas0; |
| 40 | __u32 mas1; |
| 41 | __u64 mas7_3; |
| 42 | __u64 mas2; |
| 43 | __u32 mas4; |
| 44 | __u32 mas6; |
| 45 | __u32 esr; |
| 46 | __u32 pir; |
| 47 | |
| 48 | /* |
| 49 | * SPRG4-7 are user-readable, so we can only keep these consistent |
| 50 | * between the shared area and the real registers when there's an |
| 51 | * intervening exit to KVM. This also applies to SPRG3 on some |
| 52 | * chips. |
| 53 | * |
| 54 | * This suffices for access by guest userspace, since in PR-mode |
| 55 | * KVM, an exit must occur when changing the guest's MSR[PR]. |
| 56 | * If the guest kernel writes to SPRG3-7 via the shared area, it |
| 57 | * must also use the shared area for reading while in kernel space. |
| 58 | */ |
| 59 | __u64 sprg4; |
| 60 | __u64 sprg5; |
| 61 | __u64 sprg6; |
| 62 | __u64 sprg7; |
| 63 | }; |
| 64 | |
| 65 | #define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */ |
| 66 | |
| 67 | #define KVM_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num) |
| 68 | |
| 69 | #include <asm/epapr_hcalls.h> |
| 70 | |
| 71 | #define KVM_FEATURE_MAGIC_PAGE 1 |
| 72 | |
| 73 | /* Magic page flags from host to guest */ |
| 74 | |
| 75 | #define KVM_MAGIC_FEAT_SR (1 << 0) |
| 76 | |
| 77 | /* MASn, ESR, PIR, and high SPRGs */ |
| 78 | #define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1) |
| 79 | |
| 80 | /* Magic page flags from guest to host */ |
| 81 | |
| 82 | #define MAGIC_PAGE_FLAG_NOT_MAPPED_NX (1 << 0) |
| 83 | |
| 84 | |
| 85 | #endif /* _UAPI__POWERPC_KVM_PARA_H__ */ |
| 86 |
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