Catch error, print, and continue, instead of exiting entire test.
Kernel config CONFIG_STRICT_DEVMEM is enabled by default on newer
kernels, causing these failures.
Here is what it looks like before applying the patch on my Kubuntu 18.04 system:
hintron@inspiron:~/code/jailhouse$ sudo ./tools/jailhouse hardware check
Feature Availability
------------------------------ ------------------
Number of CPUs > 1 ok
Long mode ok
x2APIC ok
VT-x (VMX) ok
VMX outside SMX ok
VMX inside SMX missing (optional)
IA32_TRUE_*_CLTS ok
NMI exiting ok
Preemption timer ok
I/O bitmap ok
MSR bitmap ok
Secondary controls ok
Optional CR3 interception ok
Virtualize APIC access ok
RDTSCP ok
Unrestricted guest ok
EPT ok
4-level page walk ok
EPTP write-back ok
2M pages ok
1G pages ok
INVEPT ok
Single or all-context ok
VM-exit save IA32_PAT ok
VM-exit load IA32_PAT ok
VM-exit save IA32_EFER ok
VM-exit load IA32_EFER ok
VM-entry load IA32_PAT ok
VM-entry load IA32_EFER ok
Activity state HLT ok
VT-d (IOMMU #0) ok
Traceback (most recent call last):
File "./tools/jailhouse-hardware-check", line 255, in <module>
mmio = MMIO(iommu[n].base_addr, iommu[n].mmio_size)
File "./tools/jailhouse-hardware-check", line 105, in __init__
f = os.open('/dev/mem', os.O_RDONLY | os.O_SYNC)
OSError: [Errno 1] Operation not permitted: '/dev/mem'
And here's what it looks like after the patch:
hintron@inspiron:~/code/jailhouse$ sudo ./tools/jailhouse hardware check
Feature Availability
------------------------------ ------------------
Number of CPUs > 1 ok
Long mode ok
x2APIC ok
VT-x (VMX) ok
VMX outside SMX ok
VMX inside SMX missing (optional)
IA32_TRUE_*_CLTS ok
NMI exiting ok
Preemption timer ok
I/O bitmap ok
MSR bitmap ok
Secondary controls ok
Optional CR3 interception ok
Virtualize APIC access ok
RDTSCP ok
Unrestricted guest ok
EPT ok
4-level page walk ok
EPTP write-back ok
2M pages ok
1G pages ok
INVEPT ok
Single or all-context ok
VM-exit save IA32_PAT ok
VM-exit load IA32_PAT ok
VM-exit save IA32_EFER ok
VM-exit load IA32_EFER ok
VM-entry load IA32_PAT ok
VM-entry load IA32_EFER ok
Activity state HLT ok
VT-d (IOMMU #0) ok
ERROR: Failed to open /dev/mem: [Errno 1] Operation not permitted: '/dev/mem'
Skipping MMIO tests, your kernel might have CONFIG_STRICT_DEVMEM enabled.
Disable for thorough testing.
VT-d (IOMMU #1) ok
ERROR: Failed to open /dev/mem: [Errno 1] Operation not permitted: '/dev/mem'
Skipping MMIO tests, your kernel might have CONFIG_STRICT_DEVMEM enabled.
Disable for thorough testing.
Check passed!
BUT: Some essential checks had to be skipped!
See https://github.com/siemens/jailhouse/pull/22
--
You received this message because you are subscribed to the Google Groups
"Jailhouse" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
