[PATCH v2 2/5] arm64: Work around Falkor erratum 1003
From: Christoffer Dall <hidden>
Date: 2017-01-04 10:33:28
Also in:
kvm, kvmarm, lkml
From: Christoffer Dall <hidden>
Date: 2017-01-04 10:33:28
Also in:
kvm, kvmarm, lkml
On Thu, Dec 29, 2016 at 05:43:32PM -0500, Christopher Covington wrote:
From: Shanker Donthineni <redacted> On the Qualcomm Datacenter Technologies Falkor v1 CPU, memory accesses may allocate TLB entries using an incorrect ASID when TTBRx_EL1 is being updated. Changing the TTBRx_EL1[ASID] and TTBRx_EL1[BADDR] fields separately using a reserved ASID will ensure that there are no TLB entries with incorrect ASID after changing the the ASID.
When we restore guest state in KVM, we completely save and restore TTBRx_EL1 from EL2. Would that be affected by this erratum? Thanks, -Christoffer