> -----Original Message----- > From: Mark Rutland [mailto:mark.rutl...@arm.com] > Sent: Tuesday, January 24, 2017 2:15 PM > To: Shameerali Kolothum Thodi > Cc: marc.zyng...@arm.com; will.dea...@arm.com; linux-arm- > ker...@lists.infradead.org; Linuxarm; linux-kernel@vger.kernel.org; > devicet...@vger.kernel.org; John Garry; Guohanjun (Hanjun Guo); > robin.mur...@arm.com > Subject: Re: [RFC 2/4] irqchip, gicv3-its:Workaround for HiSilicon > erratum 161010801 sounds like this will have severe implications for virtualization. > > > Also these platforms doesn't have a proper IIDR > > register to use the existing IIDR based quirk mechanism. > > What exactly is wrong with the IIDR on these platforms? That sounds > like > an erratum as of itself. > > What precise value do reads of the IIDR return? Or do reads result in > other erroneous behaviour?
As far as I know, there is no erroneous behavior while reading. But the IIDR JEP106 identity code is 0 on these platforms, hence not much of use. This will be corrected in next revision of hw. Thanks, Shameer
