On Mon, Feb 16, 2015 at 2:43 PM, Jan Kiszka <jan.kis...@web.de> wrote: > Hi, > > next issue related to KVM/QEMU on the TK1: The guest image I'm running > gives proper framebuffer output when in emulation mode. Once KVM is > enabled, the screen is - at best - only initially updated. Sometimes I > see the famous tux images and a bit of the console texts, but usually it > stays black. Explanations?
The QEMU accesses Guest Video RAM (or any portion of Guest RAM) as cacheable user space memory. The Guest Kernel might access Guest Video RAM as non-cacheable to maintain coherency with video device. If this is the case then all updates by Guest kernel to Guest Video RAM will not be visible to QEMU. -- Anup > > Jan > _______________________________________________ > kvmarm mailing list > kvmarm@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
