kvm/arm/psci.rst

1 .. SPDX-License-Identifier: GPL-2.0
4 Power State Coordination Interface (PSCI)
7 KVM implements the PSCI (Power State Coordination Interface)
9 and power-off to the guest.
11 The PSCI specification is regularly updated to provide new features,
17 a given guest is tied to a particular PSCI revision (unlikely), or if
18 a migration causes a different PSCI version to be exposed out of the
22 pseudo-registers" that can be manipulated using the GET/SET_ONE_REG
30   - Only valid if the vcpu has the KVM_ARM_VCPU_PSCI_0_2 feature set
32   - Returns the current PSCI version on GET_ONE_REG (defaulting to the
33     highest PSCI version implemented by KVM and compatible with v0.2)
34   - Allows any PSCI version implemented by KVM and compatible with
36   - Affects the whole VM (even if the register view is per-vcpu)
39     Holds the state of the firmware support to mitigate CVE-2017-5715, as
41     under SMCCC_ARCH_WORKAROUND_1 in [1].
57     Holds the state of the firmware support to mitigate CVE-2018-3639, as
59     under SMCCC_ARCH_WORKAROUND_2 in [1]_.
77 .. [1] https://developer.arm.com/-/media/developer/pdf/ARM_DEN_0070A_Firmware_interfaces_for_mitiga…  citation