On 12 July 2018 at 15:12, Mark Brown broonie@kernel.org wrote:

On Thu, Jul 12, 2018 at 01:50:45PM +0100, Daniel Thompson wrote:

...

The OS will discover the variable is non-modifiable when it tried to set it. Won't the current proposal mislead standards compliant use of GetVariable()? For example does it it makes standards compliant code *more* likely to call SetVariable() in order to fix up a variable that it thinks was incorrectly set with the NON_VOLATILE attribute.

Do any existing implementations change variables from non-volatile to volatile?

The UEFI spec is explicit about which variables are volatile and which are not. Simply relaxing non-volatile to volatile in the general case doesn't seem like a useful approach to me.