On Sun, Feb 16, 2025 at 01:43:45PM -0700, Simon Glass wrote: > U-Boot can start and boot an OS in both qemu-x86 and qemu-x86_64 but it > is not perfect. > > With both builds, executing the VESA ROM causes an intermittent hang, at > least on some AMD CPUs. > > With qemu-x86_64 kvm cannot be used since the move to long mode (64-bit) > is done in a way that works on real hardware but not with QEMU. This > means that performance is 4-5x slower than it could be, at least on my > CPU. > > We can work around the first problem by using Bochs, which is anyway a > better choice than VESA for QEMU. The second can be addressed by using > the same descriptor across the jump to long mode. > > With an MTRR fix this allows booting into Ubuntu on qemu-x86_64
This seems needlessly not against mainline. -- Tom
signature.asc
Description: PGP signature
