>>> On 07.09.12 at 09:18, Chen Gong <gong.chen@xxxxxxxxxxxxxxx> wrote: > On Fri, Sep 07, 2012 at 07:40:31AM +0100, Jan Beulich wrote: >> Date: Fri, 07 Sep 2012 07:40:31 +0100 >> From: Jan Beulich <JBeulich@xxxxxxxx> >> To: Len Brown <lenb@xxxxxxxxxx> >> Cc: ying.huang@xxxxxxxxx, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, >> linux-acpi@xxxxxxxxxxxxxxx >> Subject: [PATCH] GHES: correct page protection flags in >> ghes_ioremap_pfn_...() >> X-Mailer: Novell GroupWise Internet Agent 12.0.0 >> >> At least for Xen Dom0 it is very relevant to set the _PAGE_IO bit when >> ioremap-ing (non-RAM) areas, as that flag suppresses the PFN -> MFN >> translation otherwise done in PV guests. (The offending commit was >> 81e88fdc432a1552401d6e91a984dcccce72b8dc.) >> > > Oh, right. In virtual environment, physical address is virtualized, too. > We need to tell *ioremap* to map in proper address space. But I want > to do if you can update all related mappings for APEI tables? I'm not sure > if all APEI tables are affected by this issue. The other mappings that I found might be relevant use ioremap(), i.e. don't specify protection flags on their own. Jan -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
