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At the moment, Xen provides virtual PSCI interface compliant with 0.1 and 0.2. Since them, the specification has been updated and the latest version is 1.1 (see ARM DEN 0022D). >From an implementation point of view, only PSCI_FEATURES is mandatory. The rest is optional and can be left unimplemented for now. At the same time, the compatible for PSCI node have been updated to expose "arm,psci-1.0". Signed-off-by: Julien Grall <julien.grall@arm.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Reviewed-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org> Cc: Ian Jackson <ian.jackson@eu.citrix.com> Cc: mirela.simonovic@aggios.com