‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Tuesday, March 2, 2021 2:42 PM, Mike Banon <mikeb...@gmail.com> wrote:
> Have you verified that the Sapphire H61 "IOMMU enable" option is really > working? Hi Mike I do not have the Sapphire board but board status kernel log (https://review.coreboot.org/cgit/board-status.git/tree/sapphire/pureplatinumh61/4.11-659-gef4fe3e37c/2020-01-01T16_12_32Z/kernel_log.txt) indicates DMAR is fully functional and VT-d groups are created. Thanks Lud > On Tue, Feb 23, 2021 at 2:26 PM ludphaeus via coreboot > coreboot@coreboot.org wrote: > > > Hi > > I am trying to port a Haswell laptop and I would want it to have IOMMU > > support. My chipset supports VT-d but CPU does not. The official info from > > Intel says the PC needs chipset, CPU and BIOS to support VT-d to use IOMMU. > > I think this is not true because I saw some boards in board status have > > working IOMMU with no VT-d support in chipset but with coreboot advertising > > DMAR table to OS and CPU with VT-d support. Sapphire H61 is a example of > > this. But other H61 coreboot boards such as P8H61-M LX that have CPU > > without VT-d advertise no IOMMU capability. So what is really required for > > full IOMMU ? Do I have chance for full, working IOMMU on this laptop? > > Thanks, > > Lud > > > > coreboot mailing list -- coreboot@coreboot.org > > To unsubscribe send an email to coreboot-le...@coreboot.org > > -- > > Best regards, Mike Banon > Open Source Community Manager of 3mdeb - https://3mdeb.com/ > > coreboot mailing list -- coreboot@coreboot.org > To unsubscribe send an email to coreboot-le...@coreboot.org
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