On 09/08/2015 11:52 PM, Andrew Jones wrote: > On Wed, Sep 09, 2015 at 12:25:45PM +0800, Shannon Zhao wrote: >> >> >> On 2015/9/8 21:04, Leif Lindholm wrote: >>> On Tue, Sep 08, 2015 at 11:18:27AM +0800, Shannon Zhao wrote: >>>> On 2015/9/7 22:23, Leif Lindholm wrote: >>>>> The Debug Port Table 2 (DBG2) is mandated by the ARM Server Base Boot >>>>> Requirements specification. Add the DBG2 table definitions, and set up >>>>> an entry in the ARM virt machine for the pl011 UART. >>>> >>>> Looking at Documentation/arm64/acpi_object_usage.txt in Linux kernel, it >>>> says >>>> " >>>> DBG2 Signature Reserved (signature == "DBG2") >>>> == DeBuG port table 2 == >>>> Microsoft only table, will not be supported. >>>> " >>>> It seems that Linux kernel doesn't support or need it, but Windows >>>> requires it. So does it need to test this on Windows? >>> >>> No, it can be tested under Linux with the set I just sent out: >>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-September/368614.html >> >> So you need to change Documentation/arm64/acpi_object_usage.txt as well. >> But that is kernel side. > > I also wonder if Documentation/arm64/arm-acpi.txt should have its > "Booting using ACPI tables" section updated to reference (describe even?) > the use of SPCR. Maybe Leif's already doing that with the > this-time-really-for-upstream kernel spcr patches. > > drew >
It's on my TODO list to update this documentation properly, to include updates on DBG2 and SPCR along with a bunch of other ACPI 6.0 changes. My bad for the delays on this... -- ciao, al ----------------------------------- Al Stone Software Engineer Linaro Enterprise Group al.st...@linaro.org -----------------------------------
