Re: [Xen-devel] [PATCH for-4.11] libxl: fix memory map reported to PVH guests

[Juergen Gross <jgross@xxxxxxxx>]

On 20/04/18 15:52, Roger Pau Monne wrote:
> PVH guests with 4GB of RAM or more get a memory map like the
> following:
> 
> 0x00000000000000 - 0x000000fee00000 RAM
> 0x000000fee00000 - 0x00000100000000 RESERVED
> 0x000000fc009000 - 0x000000fc009040 ACPI
> 0x000000fc000000 - 0x000000fc001000 ACPI
> 0x000000fc001000 - 0x000000fc009000 ACPI
> 0x00000100000000 - 0x000001fb200400 RAM
> 
> This is wrong because ACPI regions are also reported as RAM regions.
> The cause of this issue is not setting a big enough MMIO hole, current
> libxl code only takes into account the address of the local APIC page
> and the reserved pages in order to set the size of the MMIO hole, when
> it should also take into account the location of the ACPI tables.
> 
> After the fix the layout reported for the same guest is:
> 
> 0x00000000000000 - 0x000000fc000000 RAM
> 0x000000fc000000 - 0x00000100000000 RESERVED
> 0x000000fc009000 - 0x000000fc009040 ACPI
> 0x000000fc000000 - 0x000000fc001000 ACPI
> 0x000000fc001000 - 0x000000fc009000 ACPI
> 0x00000100000000 - 0x000001fe000400 RAM
> 
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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