KVM: selftests: Test behavior of HWCR, a.k.a. MSR_K7_HWCR

Browse source

Verify the following behavior holds true for writes and reads of HWCR from
host userspace:

* Attempts to set bits 3, 6, or 8 are ignored
* Bits 18 and 24 are the only bits that can be set
* Any bit that can be set can also be cleared

Signed-off-by: Jim Mattson <jmattson@google.com>
Link: https://lore.kernel.org/r/20230929230246.1954854-4-jmattson@google.com
Co-developed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>

...

This commit is contained in:

Jim Mattson 2023-09-29 16:02:46 -07:00 • committed by Sean Christopherson

parent 8b0e00fba9

commit 591455325a

2 changed files with 48 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

tools/testing/selftests/kvm/Makefile

View file

47

tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c

View file