On 13 July 2018 at 04:01, Prakhya, Sai Praneeth <sai.praneeth.prakhya@xxxxxxxxx> wrote: >> The UEFI spec does not permit runtime services to be called reentrantly, and so >> it is up to the OS to provide proper locking around such calls. >> >> For the native case, this was fixed a long time ago, but for the mixed mode case, >> no locking is done whatsoever. Note that the calls are made with preemption >> and interrupts disabled, so only SMP configurations are affected by this issue. >> >> So add a spinlock and grab it when invoking a UEFI runtime service in mixed >> mode. We will also need to provide non-blocking versions of SetVariable() and >> QueryVariableInfo(), so add those as well. >> >> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> > > FWIW, this patch looks good to me. > Thanks Sai. I will take this as an acked-by > Regards, > Sai -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
