On 09/05/2013 08:21 PM, Paolo Bonzini wrote: > Page tables in a read-only memory slot will currently cause a triple > fault when running with shadow paging, because the page walker uses > gfn_to_hva and it fails on such a slot. > > TianoCore uses such a page table. The idea is that, on real hardware, > the firmware can already run in 64-bit flat mode when setting up the > memory controller. Real hardware seems to be fine with that as long as > the accessed/dirty bits are set. Thus, this patch saves whether the > slot is readonly, and later checks it when updating the accessed and > dirty bits. > > Note that this scenario is not supported by NPT at all, as explained by > comments in the code.
Reviewed-by: Xiao Guangrong <xiaoguangr...@linux.vnet.ibm.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
