On Di, 2017-05-02 at 20:49 +0000, Kinney, Michael D wrote: > Laszlo, > > Is it possible to add more TSEG sizes to the Q35 board?
qemu implements what physical q35 support. The extended smram register has two bits for the tseg size, three out of the four values are used (for 1, 2, 8 MB sizes). "11" is reserved in the specs. We could use "11" to implement a bigger tseg. Current code sets the tseg size to zero for "11". Alternatively we could add some qemu-specific register. When implementing this in qemu we will have to do it runtime-switchable, for backward compatibility with older qemu versions. So ideally firmware would detect somehow whenever qemu supports a bigger tseg or not and adapt at runtime. If edk2 can't do this we would need two edk2 builds ... cheers, Gerd _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
