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When AVIC, and thus IPI virtualization on AMD, is enabled, the CPU will virtualize ICR writes. Unfortunately, the CPU doesn't do a very good job, as it fails to clear the BUSY bit and also allows writing ICR2[23:0], despite them being "RESERVED MBZ". Account for the quirky behavior in the xapic_state test to avoid failures in a configuration that likely has no hope of ever being enabled in production. Link: https://lore.kernel.org/r/20240719235107.3023592-11-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com> |
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