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The PciIo interface will be used in "OvmfPkg/XenBusDxe: Add Grant Table functions" to get the memory address of the BAR 1 and use the space to map shared memory. Change in V3: - add a commit description. Change in V2: - Coding style - Error handler Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16261 6f19259b-4bc3-4df7-8a09-765794883524