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| author | Paolo Bonzini <pbonzini@redhat.com> | 2022-04-29 12:38:56 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-04-29 18:47:59 +0200 |
| commit | 71d7c575a673d42ad7175ad5fc27c85c80330311 (patch) | |
| tree | aeac64c1659ea4f6c5515c24a5de9a730d4822f3 /Documentation/virt | |
| parent | KVM: x86: Bail to userspace if emulation of atomic user access faults (diff) | |
| parent | KVM: x86/mmu: fix potential races when walking host page table (diff) | |
| download | linux-71d7c575a673d42ad7175ad5fc27c85c80330311.tar.xz linux-71d7c575a673d42ad7175ad5fc27c85c80330311.zip | |
Merge branch 'kvm-fixes-for-5.18-rc5' into HEAD
Fixes for (relatively) old bugs, to be merged in both the -rc and next
development trees.
The merge reconciles the ABI fixes for KVM_EXIT_SYSTEM_EVENT between
5.18 and commit c24a950ec7d6 ("KVM, SEV: Add KVM_EXIT_SHUTDOWN metadata
for SEV-ES", 2022-04-13).
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index 72183ae628f7..0c1b9f139e4a 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -6089,21 +6089,18 @@ should put the acknowledged interrupt vector into the 'epr' field. #define KVM_SYSTEM_EVENT_RESET 2 #define KVM_SYSTEM_EVENT_CRASH 3 #define KVM_SYSTEM_EVENT_SEV_TERM 4 - #define KVM_SYSTEM_EVENT_NDATA_VALID (1u << 31) __u32 type; __u32 ndata; - __u64 flags; __u64 data[16]; } system_event; If exit_reason is KVM_EXIT_SYSTEM_EVENT then the vcpu has triggered a system-level event using some architecture specific mechanism (hypercall or some special instruction). In case of ARM64, this is triggered using -HVC instruction based PSCI call from the vcpu. The 'type' field describes -the system-level event type. The 'flags' field describes architecture -specific flags for the system-level event. +HVC instruction based PSCI call from the vcpu. -Valid values for bits 30:0 of 'type' are: +The 'type' field describes the system-level event type. +Valid values for 'type' are: - KVM_SYSTEM_EVENT_SHUTDOWN -- the guest has requested a shutdown of the VM. Userspace is not obliged to honour this, and if it does honour @@ -6119,14 +6116,20 @@ Valid values for bits 30:0 of 'type' are: - KVM_SYSTEM_EVENT_SEV_TERM -- an AMD SEV guest requested termination. The guest physical address of the guest's GHCB is stored in `data[0]`. -Valid flags are: +If KVM_CAP_SYSTEM_EVENT_DATA is present, the 'data' field can contain +architecture specific information for the system-level event. Only +the first `ndata` items (possibly zero) of the data array are valid. + + - for arm64, data[0] is set to KVM_SYSTEM_EVENT_RESET_FLAG_PSCI_RESET2 if + the guest issued a SYSTEM_RESET2 call according to v1.1 of the PSCI + specification. - - KVM_SYSTEM_EVENT_RESET_FLAG_PSCI_RESET2 (arm64 only) -- the guest issued - a SYSTEM_RESET2 call according to v1.1 of the PSCI specification. + - for RISC-V, data[0] is set to the value of the second argument of the + ``sbi_system_reset`` call. -Extra data for this event is stored in the `data[]` array, up to index -`ndata-1` included, if bit 31 is set in `type`. The data depends on the -`type` field. There is no extra data if bit 31 is clear or `ndata` is zero. +Previous versions of Linux defined a `flags` member in this struct. The +field is now aliased to `data[0]`. Userspace can assume that it is only +written if ndata is greater than 0. :: |