Hi, On Thu, Jun 05, 2025 at 03:22:28PM +0200, Bastian Blank wrote: > Control: severity -1 serious > > On Wed, Jun 04, 2025 at 10:29:09PM +0200, Bastian Blank wrote: > > qemu is configured to always request 64 KiB pages on ppc64(el). Debian > > does not (longer) support this mode by default. This means qemu needs > > to automatically downgrade to 4 KiB if this is the only thing that's > > supported. > > This now means that qemu with kvm is completely broken on ppc64el. How > should we fix that? > > - Breaks on the kernel, with what? > - Disable kvm in the kernel?
Why would we disable kvm in the kernel in that case, just because qemu does not work with stock defaults - given that you can always disable kvm in qemu? Anyway: On one of the DSA machines I ran into this issue and the Internet told me to pass "-machine pseries,cap-hpt-max-page-size=4096" to qemu, which seems to work just fine under trixie's 4k default kernel. It'd be great if qemu could autodetect this, i.e. presumably use getconf(PAGE_SIZE) for this. Kind regards Philipp Kern
