On Tue, Jan 30, 2024 at 10:18:07AM +0000, Peter Maydell wrote: > On Mon, 29 Jan 2024 at 23:31, Fabiano Rosas <faro...@suse.de> wrote: > > > > Fabiano Rosas <faro...@suse.de> writes: > > > > > Peter Xu <pet...@redhat.com> writes: > > > > > >> On Fri, Jan 26, 2024 at 11:54:32AM -0300, Fabiano Rosas wrote: > > > The issue that occurs to me now is that 'cpu host' will not work with > > > TCG. We might actually need to go poking /dev/kvm for this to work. > > > > Nevermind this last part. There's not going to be a scenario where we > > build with CONFIG_KVM, but run in an environment that does not support > > KVM. > > Yes, there is. We'll build with CONFIG_KVM on any aarch64 host, > but that doesn't imply that the user running the build and > test has permissions for /dev/kvm.
I'm actually pretty confused on why this would be a problem even for neoverse-n1: can we just try to use KVM, if it fails then use TCG? Something like: (construct qemu cmdline) .. #ifdef CONFIG_KVM "-accel kvm " #endif "-accel tcg " .. ? IIUC if we specify two "-accel", we'll try the first, then if failed then the 2nd? -- Peter Xu
