On Thu, Oct 17, 2019 at 04:39:19AM -0700, Yian Chen wrote: > VT-d RMRR (Reserved Memory Region Reporting) regions are reserved > for device use only and should not be part of allocable memory pool of OS. > > BIOS e820_table reports complete memory map to OS, including OS usable > memory ranges and BIOS reserved memory ranges etc. > > x86 BIOS may not be trusted to include RMRR regions as reserved type > of memory in its e820 memory map, hence validate every RMRR entry > with the e820 memory map to make sure the RMRR regions will not be > used by OS for any other purposes. > > ia64 EFI is working fine so implement RMRR validation as a dummy function > > Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx> > Reviewed-by: Sohil Mehta <sohil.mehta@xxxxxxxxx> > Signed-off-by: Yian Chen <yian.chen@xxxxxxxxx> > --- > v2: > - return -EINVAL instead of -EFAULT when there is an error > --- > arch/ia64/include/asm/iommu.h | 5 +++++ > arch/x86/include/asm/iommu.h | 18 ++++++++++++++++++ > drivers/iommu/intel-iommu.c | 8 +++++++- > 3 files changed, 30 insertions(+), 1 deletion(-) Applied, thanks.
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