On 1/9/23 09:45, Janosch Frank wrote:
On 1/6/23 08:53, Cédric Le Goater wrote:
From: Cédric Le Goater <clg@redhat.com>
Support for protected VMs should have been enabled on the host with
the kernel parameter 'prot_virt=1'. If the hardware supports the
feature, it is reflected under sysfs.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Any reason why you didn't use KVM_CAP_S390_PROTECTED?
I think my setup was incorrect when I did the patch. I just verified and QEMU
indeed reports :
qemu-system-s390x: CPU model does not support Protected Virtualization
which means S390_FEAT_UNPACK was not set.
The sysfs interface isn't meant to be parsed by programs, it's been introduced
for humans. Most of the interface's data has therefore been made available via
the UV info API.
Well, QEMU is user space and does peek around in sysfs to collect some info.
Unneeded in that case.