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| author | Paolo Bonzini <pbonzini@redhat.com> | 2022-05-20 13:22:46 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-05-25 11:15:43 +0200 |
| commit | 186af6bb40c4fd2048bb81253c1109d8b3011e42 (patch) | |
| tree | 7922e27bd8f7cf3368a5052dac2720f8c42aa042 /Documentation/virt | |
| parent | x86, kvm: use correct GFP flags for preemption disabled (diff) | |
| download | linux-186af6bb40c4fd2048bb81253c1109d8b3011e42.tar.xz linux-186af6bb40c4fd2048bb81253c1109d8b3011e42.zip | |
Documentation: kvm: reorder ARM-specific section about KVM_SYSTEM_EVENT_SUSPEND
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/virt')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 52 |
1 files changed, 26 insertions, 26 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index d10d40867540..28b547a9d96a 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -6176,32 +6176,6 @@ Valid values for 'type' are: - KVM_SYSTEM_EVENT_SUSPEND -- the guest has requested a suspension of the VM. -For arm/arm64: --------------- - - KVM_SYSTEM_EVENT_SUSPEND exits are enabled with the - KVM_CAP_ARM_SYSTEM_SUSPEND VM capability. If a guest invokes the PSCI - SYSTEM_SUSPEND function, KVM will exit to userspace with this event - type. - - It is the sole responsibility of userspace to implement the PSCI - SYSTEM_SUSPEND call according to ARM DEN0022D.b 5.19 "SYSTEM_SUSPEND". - KVM does not change the vCPU's state before exiting to userspace, so - the call parameters are left in-place in the vCPU registers. - - Userspace is _required_ to take action for such an exit. It must - either: - - - Honor the guest request to suspend the VM. Userspace can request - in-kernel emulation of suspension by setting the calling vCPU's - state to KVM_MP_STATE_SUSPENDED. Userspace must configure the vCPU's - state according to the parameters passed to the PSCI function when - the calling vCPU is resumed. See ARM DEN0022D.b 5.19.1 "Intended use" - for details on the function parameters. - - - Deny the guest request to suspend the VM. See ARM DEN0022D.b 5.19.2 - "Caller responsibilities" for possible return values. - 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. @@ -6217,6 +6191,32 @@ 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. +For arm/arm64: +-------------- + +KVM_SYSTEM_EVENT_SUSPEND exits are enabled with the +KVM_CAP_ARM_SYSTEM_SUSPEND VM capability. If a guest invokes the PSCI +SYSTEM_SUSPEND function, KVM will exit to userspace with this event +type. + +It is the sole responsibility of userspace to implement the PSCI +SYSTEM_SUSPEND call according to ARM DEN0022D.b 5.19 "SYSTEM_SUSPEND". +KVM does not change the vCPU's state before exiting to userspace, so +the call parameters are left in-place in the vCPU registers. + +Userspace is _required_ to take action for such an exit. It must +either: + + - Honor the guest request to suspend the VM. Userspace can request + in-kernel emulation of suspension by setting the calling vCPU's + state to KVM_MP_STATE_SUSPENDED. Userspace must configure the vCPU's + state according to the parameters passed to the PSCI function when + the calling vCPU is resumed. See ARM DEN0022D.b 5.19.1 "Intended use" + for details on the function parameters. + + - Deny the guest request to suspend the VM. See ARM DEN0022D.b 5.19.2 + "Caller responsibilities" for possible return values. + :: /* KVM_EXIT_IOAPIC_EOI */ |