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arm64: smccc: Reserve block of KVM "vendor" services for pKVM hypercalls

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pKVM relies on hypercalls to expose services such as memory sharing to
protected guests. Tentatively allocate a block of 58 hypercalls (i.e.
fill the remaining space in the first 64 function IDs) for pKVM usage,
as future extensions such as pvIOMMU support, range-based memory sharing
and validation of assigned devices will require additional services.

Suggested-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/86a5h5yg5y.wl-maz@kernel.org
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240830130150.8568-8-will@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon 2024-08-30 14:01:50 +01:00
parent 0f12694958
commit 21be9f7110
1 changed files with 60 additions and 0 deletions
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60
include/linux/arm-smccc.h
View File

@ -115,10 +115,70 @@
/* KVM "vendor specific" services */
#define ARM_SMCCC_KVM_FUNC_FEATURES 0
#define ARM_SMCCC_KVM_FUNC_PTP 1
/* Start of pKVM hypercall range */
#define ARM_SMCCC_KVM_FUNC_HYP_MEMINFO 2
#define ARM_SMCCC_KVM_FUNC_MEM_SHARE 3
#define ARM_SMCCC_KVM_FUNC_MEM_UNSHARE 4
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_5 5
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_6 6
#define ARM_SMCCC_KVM_FUNC_MMIO_GUARD 7
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_8 8
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_9 9
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_10 10
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_11 11
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_12 12
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_13 13
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_14 14
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_15 15
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_16 16
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_17 17
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_18 18
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_19 19
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_20 20
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_21 21
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_22 22
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_23 23
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_24 24
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_25 25
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_26 26
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_27 27
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_28 28
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_29 29
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_30 30
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_31 31
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_32 32
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_33 33
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_34 34
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_35 35
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_36 36
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_37 37
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_38 38
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_39 39
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_40 40
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_41 41
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_42 42
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_43 43
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_44 44
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_45 45
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_46 46
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_47 47
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_48 48
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_49 49
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_50 50
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_51 51
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_52 52
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_53 53
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_54 54
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_55 55
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_56 56
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_57 57
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_58 58
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_59 59
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_60 60
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_61 61
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_62 62
#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_63 63
/* End of pKVM hypercall range */
#define ARM_SMCCC_KVM_FUNC_FEATURES_2 127
#define ARM_SMCCC_KVM_NUM_FUNCS 128