Re: [PATCH v2] xen/arm: Add workaround for Cortex-A76/Neoverse-N1 erratum #1286807

2020-11-18 Thread Julien Grall
On 18/11/2020 07:12, Michal Orzel wrote: Hi Julien, Hi Michal, On 17.11.2020 18:30, Julien Grall wrote: Hi Michal, On 16/11/2020 12:11, Michal Orzel wrote: On the affected Cortex-A76/Neoverse-N1 cores (r0p0 to r3p0), if a virtual address for a cacheable mapping of a location is being ac

Re: [PATCH v2] xen/arm: Add workaround for Cortex-A76/Neoverse-N1 erratum #1286807

2020-11-17 Thread Michal Orzel
Hi Julien, On 17.11.2020 18:30, Julien Grall wrote: > Hi Michal, > > On 16/11/2020 12:11, Michal Orzel wrote: >> On the affected Cortex-A76/Neoverse-N1 cores (r0p0 to r3p0), >> if a virtual address for a cacheable mapping of a location is being >> accessed by a core while another core is remappin

Re: [PATCH v2] xen/arm: Add workaround for Cortex-A76/Neoverse-N1 erratum #1286807

2020-11-17 Thread Julien Grall
Hi Michal, On 16/11/2020 12:11, Michal Orzel wrote: On the affected Cortex-A76/Neoverse-N1 cores (r0p0 to r3p0), if a virtual address for a cacheable mapping of a location is being accessed by a core while another core is remapping the virtual address to a new physical page using the recommended

Re: [PATCH v2] xen/arm: Add workaround for Cortex-A76/Neoverse-N1 erratum #1286807

2020-11-16 Thread Stefano Stabellini
On Mon, 16 Nov 2020, Michal Orzel wrote: > On the affected Cortex-A76/Neoverse-N1 cores (r0p0 to r3p0), > if a virtual address for a cacheable mapping of a location is being > accessed by a core while another core is remapping the virtual > address to a new physical page using the recommended break

Re: [PATCH v2] xen/arm: Add workaround for Cortex-A76/Neoverse-N1 erratum #1286807

2020-11-16 Thread Bertrand Marquis
Hi, > On 16 Nov 2020, at 12:11, Michal Orzel wrote: > > On the affected Cortex-A76/Neoverse-N1 cores (r0p0 to r3p0), > if a virtual address for a cacheable mapping of a location is being > accessed by a core while another core is remapping the virtual > address to a new physical page using the r

[PATCH v2] xen/arm: Add workaround for Cortex-A76/Neoverse-N1 erratum #1286807

2020-11-16 Thread Michal Orzel
On the affected Cortex-A76/Neoverse-N1 cores (r0p0 to r3p0), if a virtual address for a cacheable mapping of a location is being accessed by a core while another core is remapping the virtual address to a new physical page using the recommended break-before-make sequence, then under very rare circu