[PATCH] ARC: [haps] Add Virtio support

2019-07-02 Thread Alexey Brodkin
As a preparation for QEMU usage for ARC let's add basic Virtio-MMIO peripherals support for the platform we're going to use. For now we add 5 Virtio slots in .dts and enable block and network devices via Virtio-MMIO. Note even though typically Virtio register set fits in 0x200 bytes we "allocate"

Re: single copy atomicity for double load/stores on 32-bit systems

2019-07-02 Thread Will Deacon
On Mon, Jul 01, 2019 at 08:05:51PM +, Vineet Gupta wrote: > On 5/31/19 1:21 AM, Peter Zijlstra wrote: > > On Thu, May 30, 2019 at 11:22:42AM -0700, Vineet Gupta wrote: > >> Had an interesting lunch time discussion with our hardware architects > >> pertinent to > >> "minimal guarantees expected