On 11/23/21 17:36, Sasha Levin wrote:
From: Lai Jiangshan <laijs@xxxxxxxxxxxxxxxxx> [ Upstream commit e45e9e3998f0001079b09555db5bb3b4257f6746 ] The KVM doesn't know whether any TLB for a specific pcid is cached in the CPU when tdp is enabled. So it is better to flush all the guest TLB when invalidating any single PCID context. The case is very rare or even impossible since KVM generally doesn't intercept CR3 write or INVPCID instructions when tdp is enabled, so the fix is mostly for the sake of overall robustness. Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxxxxx> Message-Id: <20211019110154.4091-2-jiangshanlai@xxxxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
Acked-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> for this patch, but not to all the others. Paolo
