On Tue, 8 Jun 2021 16:48:09 +1000, Russell Currey wrote: > In commit f3054ffd71b5 ("selftests/powerpc: Return skip code for > spectre_v2"), the spectre_v2 selftest is updated to be aware of cases > where the vulnerability status reported in sysfs is incorrect, skipping > the test instead. > > This happens because qemu can misrepresent the mitigation status of the > host to the guest. If the count cache is disabled in the host, and this > is correctly reported to the guest, then the guest won't apply > mitigations. If the guest is then migrated to a new host where > mitigations are necessary, it is now vulnerable because it has not > applied mitigations. > > [...]
Applied to powerpc/next. [1/1] selftests/powerpc: Handle more misreporting cases in spectre_v2 https://git.kernel.org/powerpc/c/48482f4dd3432e5e62873bf0f2e254cfb8ce2ac2 cheers