diff options
Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/796202')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/796202 | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/796202 b/results/classifier/accel-gemma3:12b/kvm/796202 new file mode 100644 index 000000000..440c56c1e --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/796202 @@ -0,0 +1,33 @@ + +Doing a 64 bit load from a 32 bit local APIC register is allowed + +Doing + +u64 lapic_idregister = (u64) fix_to_virt(FIX_APIC_BASE) + 0x20; + +and later in an interrupt handler + +movq (lapic_idregister), %rcx +movq (%rcx), %rcx + +in a linux kernel module works in qemu 0.13.91 but not on real hardware (it simply reboots). +On real hardware only + +movl (%rcx), %ecx + +works (also in qemu). + +Commandline: +qemu-system-x86_64 \ + -kernel $LINUXDIR/arch/x86_64/boot/bzImage \ + -hda $BUILDROOTDIR/output/images/rootfs.ext2 \ + -append "root=/dev/sda rw rootfstype=ext2 maxcpus=4" \ + -cpu phenom \ + -smp 4 \ + -gdb tcp::1234 \ + -net nic -net user + +Guest: +Vanilla Linux Kernel 2.6.37.6 64-bit with buildroot + +Mikael Pettersson from the linux kernel mailinglist told me it's an accepts-invalid bug in qemu. \ No newline at end of file |