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| author | Greg Edwards <[email protected]> | 2023-01-06 01:13:05 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2023-01-13 10:45:35 -0500 |
| commit | d471bd853d38117c90ec02ecc51b3ca731674745 (patch) | |
| tree | db7f46c9c7823d1dc39a9e8a53ac5dde9155324e /tools/perf/scripts/python/stackcollapse.py | |
| parent | b3f257a846960d06bdaa893dbee100189fbf2234 (diff) | |
KVM: x86: Allow APICv APIC ID inhibit to be cleared
Legacy kernels prior to commit 4399c03c6780 ("x86/apic: Remove
verify_local_APIC()") write the APIC ID of the boot CPU twice to verify
a functioning local APIC. This results in APIC acceleration inhibited
on these kernels for reason APICV_INHIBIT_REASON_APIC_ID_MODIFIED.
Allow the APICV_INHIBIT_REASON_APIC_ID_MODIFIED inhibit reason to be
cleared if/when all APICs in xAPIC mode set their APIC ID back to the
expected vcpu_id value.
Fold the functionality previously in kvm_lapic_xapic_id_updated() into
kvm_recalculate_apic_map(), as this allows examining all APICs in one
pass.
Fixes: 3743c2f02517 ("KVM: x86: inhibit APICv/AVIC on changes to APIC ID or APIC base")
Signed-off-by: Greg Edwards <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sean Christopherson <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions