On Mon, Oct 25, 2021 at 06:44:26AM -0500, Patrick Williams wrote: > On Mon, Oct 25, 2021 at 08:15:41AM +0200, Greg Kroah-Hartman wrote: > > On Mon, Oct 25, 2021 at 12:38:08AM -0500, Frank Rowand wrote: > > > On 10/23/21 3:56 AM, Greg Kroah-Hartman wrote: > > > We have the bind/unbind ability today, from userspace, that can control > > this. Why not just have Linux grab the device when it boots, and then > > when userspace wants to "give the device up", it writes to "unbind" in > > sysfs, and then when all is done, it writes to the "bind" file and then > > Linux takes back over. > > > > Unless for some reason Linux should _not_ grab the device when booting, > > then things get messier, as we have seen in this thread. > > This is probably more typical on a BMC than atypical. The systems often require > the BMC (running Linux) to be able to reboot independently from the managed host > (running anything). In the example Zev gave, the BMC rebooting would rip away > the BIOS chip from the running host. > > The BMC almost always needs to come up in a "I don't know what could possibly be > going on in the system" state and re-discover where the system was left off. Isn't it an architectural issue then? -- With Best Regards, Andy Shevchenko
