Thanks to patches surfacing on public mailing lists on Monday that continue work on the open-source enablement of Intel Haswell
graphics under Linux, we have a look at the different variants of Haswell. Somewhat surprising is that there's 36 different IDs representing the next-generation Haswell products with different flavors of integrated graphics.
Having 36 different PCI IDs for Haswell graphics processors is much greater than what was seen for any previous generation. Within the open-source Intel Linux graphics driver right now are just six for Ivy Bridge: GT1 and GT2 variants for mobile, desktop, and server CPUs. Sandy Bridge had a few more with the GT2+ variant for mobile and desktop CPUs. With Haswell though, it looks like there will be more flavors.
Here's a rundown of the PCI IDs that were made public on Monday through Intel's open-source Linux driver.
Intel Haswell Desktop (GT1):
Intel Haswell Desktop (GT2):
Intel Haswell Desktop (GT2+):
Intel Haswell Mobile (GT1):
Intel Haswell Mobile (GT2):
Intel Haswell Mobile (GT2+):
Intel Haswell Server (GT1):
Intel Haswell Server (GT2):
Intel Haswell Server (GT2+):
Intel Haswell SDV Desktop (GT1):
Intel Haswell SDV Desktop (GT2):
Intel Haswell SDV Desktop (GT2+):
Intel Haswell SDV Mobile (GT1):
Intel Haswell SDV Mobile (GT2):
Intel Haswell SDV Mobile (GT2+):
Intel Haswell SDV Server (GT1):
Intel Haswell SDV Server (GT2):
Intel Haswell SDV Server (GT2+):
Intel Haswell ULT Desktop (GT1):
Intel Haswell ULT Desktop (GT2):
Intel Haswell ULT Desktop (GT2+):
Intel Haswell ULT Mobile (GT1):
Intel Haswell ULT Mobile (GT2):
Intel Haswell ULT Mobile (GT2+):
Intel Haswell ULT Server (GT1):
Intel Haswell ULT Server (GT2):
Intel Haswell ULT Server (GT2+):
Intel Haswell CRW Desktop (GT1):
Intel Haswell CRW Desktop (GT2):
Intel Haswell CRW Desktop (GT2+):
Intel Haswell CRW Mobile (GT1):
Intel Haswell CRW Mobile (GT2):
Intel Haswell CRW Mobile (GT2+):
Intel Haswell CRW Server (GT1):
Intel Haswell CRW Server (GT2):
Intel Haswell CRW Server (GT2+):
It looks like for desktop, server, and mobile CPUs for the graphics processor flavors for each of them there will be GT1
, and GT2+
varieties. However, beyond that there's then SDV, ULT, and CRW varieties for each of the desktop/server/mobile segments with GT1/GT2/GT2+ graphics.
This official Intel Linux kernel patch deviates from what was reportedly previously of Haswell having GT1, GT2, and GT3 models, with it being a likely naming discrepancy between GT2+ and GT3.
is likely for Software Development Vehicle
-- Intel's early development hardware for their developers and partners. The SDV models aren't for retail consumers. Having separate PCI IDs now for Intel SDV models is useful for determining development vs. production hardware and separating any quirks out there.
one would assume is for Ultrabooks
. This might be their low-power spin of Haswell for Ultrabooks or on the server front for any low-power Haswell-based Xeon processors with ultra efficiency.
Lastly, there is CRW
, but that's not ringing any bells right now -- I'll update if that name comes to mind, perhaps after more coffee this morning or getting ahold of some sources. Within the Intel Linux driver stack was never previous any CRW model.
The PCI IDs were obtained from this mailing list post
plus there was matching ID lists for the libdrm and Intel Linux kernel DRM driver as well. The patch comes from Paulo Zanoni of Intel's Open-Source Technology Center and has been reviewed by others on the OTC crew as well.
In a pull request on Tuesday morning containing driver fixes -- including these new Haswell IDs -- Daniel Vetter of Intel writes
, "tons of hsw pci ids - this one is a bit late because internal approval sometimes takes a while, but ppl in charge finally agreed that world+dog already knows about ult and crw haswell variants ;-)"
Intel Haswell processors are expected to succeed Ivy Bridge
in Q2'2013. Haswell will be manufactured on a 22nm process with the 3D tri-gate transistors while being designed around new CPU sockets, ship with AVX2 (Advanced Vector Extensions 2), Intel Transaction Synchronization Extensions, DDR4 support on the high-end, and improved graphics support. The Haswell graphics performance is more competitive thanks to higher clocks, the stacked memory that will be as much as 128MB I've heard from reliable developers, and other improvements.
While Ivy Bridge is only a few months old and is doing great on Linux
, I'm already very excited about Haswell coming next year. The Haswell processor and graphics performance should both be splendid. (Speaking of Ivy Bridge Linux, the next Phoronix benchmarks there coming out include HD 2500 IVB testing from an Intel Core i5 3470 and then Ivy Bridge benchmark results from an Apple MacBook Pro with Retina Display.)
Intel's open-source developers have been publicly working on the Haswell graphics driver enablement for months
and so far it appears to be in great shape -- in large part thanks to the great work of the late
. The Haswell Linux graphics support should already be at parity to the Ivy Bridge Linux support
. Separate Intel teams have also been working on other areas such as compiler optimizations for Haswell
. Intel Valley View
is also coming together nicely.
Exciting times are ahead for Linux on Intel hardware!