> -----Original Message----- > From: Darren Hart [mailto:dvhart@xxxxxxxxxxxxx] > Sent: Wednesday, September 27, 2017 12:46 PM > To: Limonciello, Mario <Mario_Limonciello@xxxxxxxx> > Cc: pali.rohar@xxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; platform-driver- > x86@xxxxxxxxxxxxxxx; quasisec@xxxxxxxxxx > Subject: Re: [PATCH 04/12] platform/x86: dell-smbios: Switch to a WMI-ACPI > interface > > On Mon, Sep 25, 2017 at 07:28:57PM +0000, Mario.Limonciello@xxxxxxxx wrote: > > > > > > > -----Original Message----- > > > From: Pali Rohár [mailto:pali.rohar@xxxxxxxxx] > > > Sent: Monday, September 25, 2017 12:19 PM > > > To: Limonciello, Mario <Mario_Limonciello@xxxxxxxx> > > > Cc: dvhart@xxxxxxxxxxxxx; LKML <linux-kernel@xxxxxxxxxxxxxxx>; platform- > driver- > > > x86@xxxxxxxxxxxxxxx; quasisec@xxxxxxxxxx > > > Subject: Re: [PATCH 04/12] platform/x86: dell-smbios: Switch to a WMI-ACPI > > > interface > > > > > > On Thursday 21 September 2017 08:57:09 Mario Limonciello wrote: > > > > The driver currently uses an SMI interface which grants direct access > > > > to physical memory to the platform via a pointer. > > > > > > > > Changing this to operate over WMI-ACPI will use an ACPI OperationRegion > > > > for a buffer of data storage when platform calls are performed. > > > > > > > > This is a safer approach to use in kernel drivers as the platform will > > > > only have access to that OperationRegion. > > > > > > In my opinion direct access is safer then using ACPI wrapper for same > > > functionality. > > > > I'd like to hear how this is safer. > > Again, I think the disconnect is around the term "platform". I think above you > can s/platform/SMM/ right? > >From my OEM hat we don't really refer to SMM as an entity, but "Yeah" if that makes it clearer I'd agree.
