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Introduce flag XEN_SYSCTL_PHYSCAP_vpmu which indicates whether the platform supports vPMU functionality. Modify Xen and tools accordingly. Take the opportunity and fix XEN_SYSCTL_PHYSCAP_vmtrace definition in sysctl.h which wrongly use (1 << 6) instead of (1u << 6). Signed-off-by: Michal Orzel <michal.orzel@arm.com> Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com> Acked-by: Nick Rosbrook <rosbrookn@ainfosec.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Acked-by: Ian Jackson <iwj@xenproject.org> Acked-by: Christian Lindig <christian.lindig@citrix.com>