Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Russell King
On Sat, Jan 20, 2018 at 11:31:19AM +, Marc Zyngier wrote: > Define enough. These patches allow these CPUs to cope with variant-2, > and only variant-2. Variant-1 is still work in progress across all > architectures, variant-3 (aka Meltdown) doesn't concern 32bit ARM > implementations, and only

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Marc Zyngier
On Sat, 20 Jan 2018 12:29:22 + Russell King wrote: > On Sat, Jan 20, 2018 at 11:31:19AM +, Marc Zyngier wrote: > > Define enough. These patches allow these CPUs to cope with variant-2, > > and only variant-2. Variant-1 is still work in progress across all > > architectures, variant-3 (aka

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Michael Nazzareno Trimarchi
Hi On Sat, Jan 20, 2018 at 12:31 PM, Marc Zyngier wrote: > On Sat, 20 Jan 2018 11:45:08 +0100 > Michael Nazzareno Trimarchi wrote: > >> Hi Marc >> >> On Sat, Jan 20, 2018 at 11:42 AM, Marc Zyngier wrote: >> > On Fri, 19 Jan 2018 16:56:14 -0500 >> > Tom Rini wrote: >> > >> >> Hey all, >> >> >>

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Marc Zyngier
On Sat, 20 Jan 2018 11:45:08 +0100 Michael Nazzareno Trimarchi wrote: > Hi Marc > > On Sat, Jan 20, 2018 at 11:42 AM, Marc Zyngier wrote: > > On Fri, 19 Jan 2018 16:56:14 -0500 > > Tom Rini wrote: > > > >> Hey all, > >> > >> So, now that things have quieted down a little bit in this area, I'

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Marc Zyngier
On Fri, 19 Jan 2018 23:21:44 +0100 Mark Kettenis wrote: > > Date: Fri, 19 Jan 2018 16:56:14 -0500 > > From: Tom Rini > > > > Hey all, > > > > So, now that things have quieted down a little bit in this area, I've > > been wondering about something. Over on the U-Boot side of things, are > > th

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Marc Zyngier
On Fri, 19 Jan 2018 17:10:04 -0600 Nishanth Menon wrote: > On 01/19/2018 04:21 PM, Mark Kettenis wrote: > >> Date: Fri, 19 Jan 2018 16:56:14 -0500 > >> From: Tom Rini > >> > >> Hey all, > >> > >> So, now that things have quieted down a little bit in this area, I've > >> been wondering about some

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Michael Nazzareno Trimarchi
Hi Marc On Sat, Jan 20, 2018 at 11:42 AM, Marc Zyngier wrote: > On Fri, 19 Jan 2018 16:56:14 -0500 > Tom Rini wrote: > >> Hey all, >> >> So, now that things have quieted down a little bit in this area, I've >> been wondering about something. Over on the U-Boot side of things, are >> there chang

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Marc Zyngier
On Fri, 19 Jan 2018 16:56:14 -0500 Tom Rini wrote: > Hey all, > > So, now that things have quieted down a little bit in this area, I've > been wondering about something. Over on the U-Boot side of things, are > there changes we need to make in order to support the kernel side of the > various m

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-20 Thread Michael Nazzareno Trimarchi
Hi Nishanth On Sat, Jan 20, 2018 at 12:10 AM, Nishanth Menon wrote: > On 01/19/2018 04:21 PM, Mark Kettenis wrote: >>> >>> Date: Fri, 19 Jan 2018 16:56:14 -0500 >>> From: Tom Rini >>> >>> Hey all, >>> >>> So, now that things have quieted down a little bit in this area, I've >>> been wondering ab

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-19 Thread Nishanth Menon
On 01/19/2018 04:21 PM, Mark Kettenis wrote: Date: Fri, 19 Jan 2018 16:56:14 -0500 From: Tom Rini Hey all, So, now that things have quieted down a little bit in this area, I've been wondering about something. Over on the U-Boot side of things, are there changes we need to make in order to sup

Re: [U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-19 Thread Mark Kettenis
> Date: Fri, 19 Jan 2018 16:56:14 -0500 > From: Tom Rini > > Hey all, > > So, now that things have quieted down a little bit in this area, I've > been wondering about something. Over on the U-Boot side of things, are > there changes we need to make in order to support the kernel side of the > v

[U-Boot] U-Boot, cache speculation side channel attacks and ARM

2018-01-19 Thread Tom Rini
Hey all, So, now that things have quieted down a little bit in this area, I've been wondering about something. Over on the U-Boot side of things, are there changes we need to make in order to support the kernel side of the various mitigations properly? I know that for example currently https://d