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| author | Sean Christopherson <[email protected]> | 2025-02-15 01:14:35 +0000 |
|---|---|---|
| committer | Sean Christopherson <[email protected]> | 2025-02-24 16:59:58 +0000 |
| commit | a5d7700af6b036d3b5c17fdf0be3ee38c653aee7 (patch) | |
| tree | 5528867d93f2947634aa86ba05387e6c81ecd5c0 /tools/testing/selftests/net/lib/py/utils.py | |
| parent | KVM: x86/xen: Add an #ifdef'd helper to detect writes to Xen MSR (diff) | |
| download | kernel-a5d7700af6b036d3b5c17fdf0be3ee38c653aee7.tar.gz kernel-a5d7700af6b036d3b5c17fdf0be3ee38c653aee7.zip | |
KVM: x86/xen: Consult kvm_xen_enabled when checking for Xen MSR writes
Query kvm_xen_enabled when detecting writes to the Xen hypercall page MSR
so that the check is optimized away in the likely scenario that Xen isn't
enabled for the VM.
Deliberately open code the check instead of using kvm_xen_msr_enabled() in
order to avoid a double load of xen_hvm_config.msr (which is admittedly
rather pointless given the widespread lack of READ_ONCE() usage on the
plethora of vCPU-scoped accesses to kvm->arch.xen state).
No functional change intended.
Reviewed-by: David Woodhouse <[email protected]>
Reviewed-by: Paul Durrant <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sean Christopherson <[email protected]>
Diffstat (limited to 'tools/testing/selftests/net/lib/py/utils.py')
0 files changed, 0 insertions, 0 deletions