From: Jan Beulich Date: Thu, 14 May 2020 05:53:55 +0000 (+0200) Subject: x86/PVH: PHYSDEVOP_pci_mmcfg_reserved should not blindly register a region X-Git-Tag: archive/raspbian/4.14.0+80-gd101b417b7-1+rpi1^2~63^2~274 X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=b539eeffc737d859dd1814c2e529e0ed0feba7a7;p=xen.git x86/PVH: PHYSDEVOP_pci_mmcfg_reserved should not blindly register a region The op has a "is reserved" flag, and hence registration shouldn't happen unilaterally. Fixes: eb3dd90e4089 ("x86/physdev: enable PHYSDEVOP_pci_mmcfg_reserved for PVH Dom0") Signed-off-by: Jan Beulich Reviewed-by: Roger Pau Monné --- diff --git a/xen/arch/x86/physdev.c b/xen/arch/x86/physdev.c index 3a3c15890b..23465bcd00 100644 --- a/xen/arch/x86/physdev.c +++ b/xen/arch/x86/physdev.c @@ -556,7 +556,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg) ret = pci_mmcfg_reserved(info.address, info.segment, info.start_bus, info.end_bus, info.flags); - if ( !ret && has_vpci(currd) ) + if ( !ret && has_vpci(currd) && (info.flags & XEN_PCI_MMCFG_RESERVED) ) { /* * For HVM (PVH) domains try to add the newly found MMCFG to the