On Tue, Jun 07, 2016 at 08:32:26PM +0800, Shannon Zhao wrote: [...] > That's its own mechanism I think and UEFI wants all the memory maps > under its control. And it's same for QEMU(x86 and ARM) and also for Xen > on x86. You can have a look at the OvmfPkg/AcpiPlatformDxe/Xen.c which > is used for x86 Xen DomU. >
I don't think Xen relocates ACPI tables in OVMF. The code scans for signature in code. I also don't quite get the "control memory map" part. OVMF doesn't update the memory map, it accepts the memory map provided by hvmloader as-is. See OvmfPkg/PlatformPei/Xen.c:XenGetE820Map. Note that I'm talking about this in a pretty out of context way, so I could be misunderstading what you said. > > Anyway, you rely on the UEFI firmware to always relocating the tables. > > What would happen if they decide to remove this behavior? > Eh, I don't believe this would happen. > I think we can only rely on the spec to be sure. Wei. > -- > Shannon > _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
