Re: [RFC PATCH v2 04/10] arm64: head.S: Enable EL1 (host) access to SPE when entered at EL2

2017-01-13 Thread Marc Zyngier
On 13/01/17 16:03, Will Deacon wrote: > The SPE architecture requires each exception level to enable access > to the SPE controls for the exception level below it, since additional > context-switch logic may be required to handle the buffer safely. > > This patch allows EL1 (host) access to the

Re: [RFC PATCH v2 04/10] arm64: head.S: Enable EL1 (host) access to SPE when entered at EL2

2017-01-13 Thread Marc Zyngier
On 13/01/17 16:03, Will Deacon wrote: > The SPE architecture requires each exception level to enable access > to the SPE controls for the exception level below it, since additional > context-switch logic may be required to handle the buffer safely. > > This patch allows EL1 (host) access to the

[RFC PATCH v2 04/10] arm64: head.S: Enable EL1 (host) access to SPE when entered at EL2

2017-01-13 Thread Will Deacon
The SPE architecture requires each exception level to enable access to the SPE controls for the exception level below it, since additional context-switch logic may be required to handle the buffer safely. This patch allows EL1 (host) access to the SPE controls when entered at EL2. Cc: Marc

[RFC PATCH v2 04/10] arm64: head.S: Enable EL1 (host) access to SPE when entered at EL2

2017-01-13 Thread Will Deacon
The SPE architecture requires each exception level to enable access to the SPE controls for the exception level below it, since additional context-switch logic may be required to handle the buffer safely. This patch allows EL1 (host) access to the SPE controls when entered at EL2. Cc: Marc