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Oleksandr Tyshchenko
1e6706b0d1
We need to pass info about maximum supported guest physical address space size to the toolstack on Arm in order to properly calculate the base and size of the extended region (safe range) for the guest. The extended region is unused address space which could be safely used by domain for foreign/grant mappings on Arm. The extended region itself will be handled by the subsequent patch. Currently the same guest physical address space size is used for all guests (p2m_ipa_bits variable on Arm, the x86 equivalent is hap_paddr_bits). Add an explicit padding after "gpaddr_bits" field and also (while at it) after "domain" field. Also make sure that full structure is cleared in all cases by moving the clearing into getdomaininfo(). Currently it is only cleared by the sysctl caller (and only once). Please note, we do not need to bump XEN_DOMCTL_INTERFACE_VERSION as a bump has already occurred in this release cycle. But we do need to bump XEN_SYSCTL_INTERFACE_VERSION as the structure is re-used in a sysctl. Suggested-by: Julien Grall <jgrall@amazon.com> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> Reviewed-by: Ian Jackson <iwj@xenproject.org> [hypervisor parts] Reviewed-by: Jan Beulich <jbeulich@suse.com>