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| author | Sean Christopherson <seanjc@google.com> | 2026-09-23 09:37:21 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2026-09-26 00:39:55 -0400 |
| commit | 93de2a6a4b91b72607136dd656edf03fb399d27f (patch) | |
| tree | 9220c76eb23cb39a146fac9692ee69afa4aa3135 /Documentation/ABI/testing/sysfs-bus-bcma | |
| download | linux-stable-93de2a6a4b91b72607136dd656edf03fb399d27f.tar.gz linux-stable-93de2a6a4b91b72607136dd656edf03fb399d27f.zip | |
KVM: SEV: Do cache maintenance on the source VM during intra-host migrationgrafted
Manually perform cache maintenance on the source VM during intra-host
migration to ensure no stale data is left in CPU caches after the VM is
destroyed. Because the source VM is "converted" to a non-SEV VM, KVM's
memory reclaim flows won't trigger cache maintenance, e.g. when all guest
memory is reclaimed in response to detaching from the mmu_notifier.
Note, relying on the destination VM to do cache maintenance isn't an option
as KVM doesn't require identical guest memory configurations, i.e. the
source VM may have access to memory that the destination VM does not.
Enforcing equivalent memory configurations is infeasible, as it would
require a *deep* comparison of memslots, e.g. to verify that not only are
the memslot identical, but what the memslots point at is also identical.
Fixes: b56639318bb2 ("KVM: SEV: Add support for SEV intra host migration")
Cc: stable@vger.kernel.org
Reported-by: Stefan Teodorescu <fane@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260923163721.1584779-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-bcma')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-bcma | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-bcma b/Documentation/ABI/testing/sysfs-bus-bcma new file mode 100644 index 000000000..e93d3ddca --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-bcma @@ -0,0 +1,31 @@ +What: /sys/bus/bcma/devices/.../manuf +Date: May 2011 +KernelVersion: 3.0 +Contact: Rafał Miłecki <zajec5@gmail.com> +Description: + Each BCMA core has its manufacturer id. See + include/linux/bcma/bcma.h for possible values. + +What: /sys/bus/bcma/devices/.../id +Date: May 2011 +KernelVersion: 3.0 +Contact: Rafał Miłecki <zajec5@gmail.com> +Description: + There are a few types of BCMA cores, they can be identified by + id field. + +What: /sys/bus/bcma/devices/.../rev +Date: May 2011 +KernelVersion: 3.0 +Contact: Rafał Miłecki <zajec5@gmail.com> +Description: + BCMA cores of the same type can still slightly differ depending + on their revision. Use it for detailed programming. + +What: /sys/bus/bcma/devices/.../class +Date: May 2011 +KernelVersion: 3.0 +Contact: Rafał Miłecki <zajec5@gmail.com> +Description: + Each BCMA core is identified by few fields, including class it + belongs to. See include/linux/bcma/bcma.h for possible values. |