On 06/22/17 22:37, Brijesh Singh wrote: > Platforms that optionally provide an IOMMU protocol should do so by > including a DXE driver (usually called IoMmuDxe) that produces either > the IOMMU protocol -- if the underlying capabilities are available --, > or gIoMmuAbsentProtocolGuid, to signal that the IOMMU capability > detection completed with negative result (i.e., no IOMMU will be > available in the system). > > In turn, DXE drivers (and library instances) that are supposed to use > the IOMMU protocol if it is available should add the following to > their DEPEX: > > gEdkiiIoMmuProtocolGuid OR gIoMmuAbsentProtocolGuid > > This ensures these client modules will only be dispatched after IOMMU > detection completes (with positive or negative result). > > Cc: Jordan Justen <[email protected]> > Cc: Laszlo Ersek <[email protected]> > Cc: Leo Duran <[email protected]> > Contributed-under: TianoCore Contribution Agreement 1.0 > Suggested-by: Jordan Justen <[email protected]> > Suggested-by: Laszlo Ersek <[email protected]> > Signed-off-by: Brijesh Singh <[email protected]> > --- > OvmfPkg/OvmfPkg.dec | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec > index 5627be0bab0a..4241af10c3d0 100644 > --- a/OvmfPkg/OvmfPkg.dec > +++ b/OvmfPkg/OvmfPkg.dec > @@ -69,6 +69,7 @@ [Protocols] > gBlockMmioProtocolGuid = {0x6b558ce3, 0x69e5, 0x4c67, {0xa6, > 0x34, 0xf7, 0xfe, 0x72, 0xad, 0xbe, 0x84}} > gXenBusProtocolGuid = {0x3d3ca290, 0xb9a5, 0x11e3, {0xb7, > 0x5d, 0xb8, 0xac, 0x6f, 0x7d, 0x65, 0xe6}} > gXenIoProtocolGuid = {0x6efac84f, 0x0ab0, 0x4747, {0x81, > 0xbe, 0x85, 0x55, 0x62, 0x59, 0x04, 0x49}} > + gIoMmuAbsentProtocolGuid = {0xf8775d50, 0x8abd, 0x4adf, {0x92, > 0xac, 0x85, 0x3e, 0x51, 0xf6, 0xc8, 0xdc}} > > [PcdsFixedAtBuild] > gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvBase|0x0|UINT32|0 >
This patch is identical to its v6 counterpart (modulo the superfluous line in the v6 commit message, pointed out by Jordan, which you have removed here, thanks), but you forgot to pick up my R-b from v6: [email protected]">http://mid.mail-archive.com/[email protected] So, Reviewed-by: Laszlo Ersek <[email protected]> Thanks Laszlo _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
