Hi, Maxiwell. On Tue, Feb 26, 2019 at 11:21:26AM -0300, Maxiwell S. Garcia wrote: > On Tue, Feb 26, 2019 at 02:21:03PM +1100, David Gibson wrote: > > On Mon, Feb 25, 2019 at 08:20:09PM -0300, Murilo Opsfelder Araujo wrote: > > > Hi, Maxiwell. > > > > > > On Mon, Feb 25, 2019 at 01:23:25PM -0300, Maxiwell S. Garcia wrote: > > > > This adds a handler for ibm,get-vpd RTAS calls, allowing pseries > > > > guest to collect host information. It is disabled by default to > > > > avoid unwanted information leakage. To enable it, use: > > > > ‘-M pseries,vpd-export=on’ > > > > > > The patch for setting host-serial and host-model already landed Gibson's > > > ppc-for-4.0 branch: > > > > > > commit 9e584f45868f6945c1282c938278038cba0e4af2 > > > Author: Prasad J Pandit <p...@fedoraproject.org> > > > Date: Mon Feb 18 23:43:49 2019 +0530 > > > > > > ppc: add host-serial and host-model machine attributes > > > (CVE-2019-8934) > > > > > > > > > QEMU should only return host-serial and host-model from the host if the > > > following combination of parameters are provided: > > > > > > -M host-serial=passthrough,host-model=passthrough,vpd-export=on > > > > > > If host-serial or host-model are set with a user-string, ibm,get-vpd > > > should > > > honor these values and return them, not exposing host information by > > > accident. > > > > > > I'm not even sure if we need vpd-export=<bool> setting. Its logic could be > > > derived from the presence of host-serial=passthrough and > > > host-model=passthrough > > > options. > > > > > > What do you think? > > > > That's an excellent point - I hadn't thought through the fact that > > this is the same information exposed by those properties. I do indeed > > think that exposing the same information set in those properties - and > > thereby avoiding the new machine option - would be a better plan. > > > > I saw that the patch was applied. So I will work in another patch > to use these properties and remove the export-vpd option. > > Another thing that I thought the fact that 'host-serial' and 'host-model' > nodes in Device Tree are not in accordance with LoPAPR document. What > you think in use only get-vpd to get these information and remove > nodes from device tree?
Both "system-id" and "model" properties are described in the section "3.3.2.1 Root Node Properties" of the "Device Tree Bindings: Linux on Power Architecture Reference" document: https://members.openpowerfoundation.org/wg/SYSSW/document/1455 -- Murilo
