coreboot March 2017

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267 discussions

Re: [coreboot] Question about Intel HD graphics and FLR
by Nico Huber 30 Mar '17

30 Mar '17

Hi JP, On 30.03.2017 17:48, Joshua Pincus wrote: > Hi Zoran, > > Thanks for your reply. > > My situation is this: When the VM guest comes up the first time from a > system-level reset (aka power on), the Broadwell HD graphics device runs > fine. I see basic VGA both before and during the boot of Windows. Once > Windows boots, the HD graphics device is configured by Intel's driver and I > see hi-rez output. On a reboot of Windows within the VM, an FLR is > issued. When the guest comes back up, no VGA. Windows does boot but > provides no VGA output. If Windows needs to drop into VGA mode so that a > user can access the real-mode functionality of the recovery console, still > no VGA. what kind of VM? what does it usually do when booting to support windows (supposedly runs some BIOS / UEFI code)? Does that include running a VBIOS or GOP UEFI driver? > > It's only on Broadwell-based boards that we have this problem. If we issue > FLRs during the reset of the PCI bus for older Intel boards, no problem. > We get VGA. Something involved with the FLR is messing up the state of the > hardware instead of actually returning the hardware to a virgin state, akin > to what you would get from a full system reset. AFAIK, Windows doesn't need a virgin state but the state the VBIOS / GOP driver usually leaves the hardware in. Plus a Video BIOS Table (VBT) with some hints about a board's specifics. What are these older boards? Are you sure they support FLR? The first hints about FLR support I could find were is a Haswell datasheet. Nico

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Re: [coreboot] Question about Intel HD graphics and FLR
by Joshua Pincus 30 Mar '17

30 Mar '17

Hi Zoran, So long as you don't have to kill anyone to get the info, I genuinely appreciate the help. JP On Thu, Mar 30, 2017 at 9:54 AM, Zoran Stojsavljevic < zoran.stojsavljevic(a)gmail.com> wrote: > OK, Joshua! > > I do not promise anything. But I, out of (your) desperation, will try to > find answers for you. If (no promise)... > > If I (eventually) return back, I have only one condition for you: NEVER > ask how I found (any future) answer for/to you! > > Thank you, > Zoran > > On Thu, Mar 30, 2017 at 5:48 PM, Joshua Pincus <joshua.pincus(a)gmail.com> > wrote: > >> Hi Zoran, >> >> Thanks for your reply. >> >> My situation is this: When the VM guest comes up the first time from a >> system-level reset (aka power on), the Broadwell HD graphics device runs >> fine. I see basic VGA both before and during the boot of Windows. Once >> Windows boots, the HD graphics device is configured by Intel's driver and I >> see hi-rez output. On a reboot of Windows within the VM, an FLR is >> issued. When the guest comes back up, no VGA. Windows does boot but >> provides no VGA output. If Windows needs to drop into VGA mode so that a >> user can access the real-mode functionality of the recovery console, still >> no VGA. >> >> It's only on Broadwell-based boards that we have this problem. If we >> issue FLRs during the reset of the PCI bus for older Intel boards, no >> problem. We get VGA. Something involved with the FLR is messing up the >> state of the hardware instead of actually returning the hardware to a >> virgin state, akin to what you would get from a full system reset. >> >> I was wondering if anyone had seen this kind of behavior. We've tried >> everything. We've manipulated all of the obvious HD graphics MMIO >> registers involved with restoring VGA but nothing seems to work. >> >> Thanks, >> JP >> >> On Thu, Mar 30, 2017 at 4:29 AM, Zoran Stojsavljevic < >> zoran.stojsavljevic(a)gmail.com> wrote: >> >>> Hello Joshua, >>> >>> I'll ask similar question, considering UEFI (BIOS). I have no idea if >>> you can issue somehow easy FLR (PCI Function Level Reset), but if you >>> can, does this use case repeat itself? >>> >>> I found, related to BIOS, this pointer (http://www.tomshardware.co.uk >>> /forum/278002-30-solved-what-capability-option-bios), since I do NOT >>> recall this option in any (legacy and UEFI) of the BIOSes I used (and I >>> used lot (>100) of them). Probably, did not pay too much attention, since I >>> do not recall this option to be tested/used?! >>> >>> Zoran >>> >>> On Wed, Mar 29, 2017 at 10:49 PM, Joshua Pincus <joshua.pincus(a)gmail.com >>> > wrote: >>> >>>> Hi, >>>> >>>> After performing just an FLR (PCI function level reset) of a Gen8 Intel >>>> HD graphics device, there's no VGA output from the device, no matter what I >>>> try to do. I've had coreboot reset the graphics control register, VGA >>>> control, VGA display disable bit, etc. >>>> >>>> Has anyone seen anything like this? The only way I can get VGA >>>> restored is by performing a system-level reset. But I just want to do an >>>> FLR. Any ideas? >>>> >>>> Thanks, >>>> JP >>>> >>>> -- >>>> coreboot mailing list: coreboot(a)coreboot.org >>>> https://www.coreboot.org/mailman/listinfo/coreboot >>>> >>> >>> >> >

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Re: [coreboot] Question about Intel HD graphics and FLR
by Zoran Stojsavljevic 30 Mar '17

30 Mar '17

OK, Joshua! I do not promise anything. But I, out of (your) desperation, will try to find answers for you. If (no promise)... If I (eventually) return back, I have only one condition for you: NEVER ask how I found (any future) answer for/to you! Thank you, Zoran On Thu, Mar 30, 2017 at 5:48 PM, Joshua Pincus <joshua.pincus(a)gmail.com> wrote: > Hi Zoran, > > Thanks for your reply. > > My situation is this: When the VM guest comes up the first time from a > system-level reset (aka power on), the Broadwell HD graphics device runs > fine. I see basic VGA both before and during the boot of Windows. Once > Windows boots, the HD graphics device is configured by Intel's driver and I > see hi-rez output. On a reboot of Windows within the VM, an FLR is > issued. When the guest comes back up, no VGA. Windows does boot but > provides no VGA output. If Windows needs to drop into VGA mode so that a > user can access the real-mode functionality of the recovery console, still > no VGA. > > It's only on Broadwell-based boards that we have this problem. If we > issue FLRs during the reset of the PCI bus for older Intel boards, no > problem. We get VGA. Something involved with the FLR is messing up the > state of the hardware instead of actually returning the hardware to a > virgin state, akin to what you would get from a full system reset. > > I was wondering if anyone had seen this kind of behavior. We've tried > everything. We've manipulated all of the obvious HD graphics MMIO > registers involved with restoring VGA but nothing seems to work. > > Thanks, > JP > > On Thu, Mar 30, 2017 at 4:29 AM, Zoran Stojsavljevic < > zoran.stojsavljevic(a)gmail.com> wrote: > >> Hello Joshua, >> >> I'll ask similar question, considering UEFI (BIOS). I have no idea if you >> can issue somehow easy FLR (PCI Function Level Reset), but if you can, >> does this use case repeat itself? >> >> I found, related to BIOS, this pointer (http://www.tomshardware.co.uk >> /forum/278002-30-solved-what-capability-option-bios), since I do NOT >> recall this option in any (legacy and UEFI) of the BIOSes I used (and I >> used lot (>100) of them). Probably, did not pay too much attention, since I >> do not recall this option to be tested/used?! >> >> Zoran >> >> On Wed, Mar 29, 2017 at 10:49 PM, Joshua Pincus <joshua.pincus(a)gmail.com> >> wrote: >> >>> Hi, >>> >>> After performing just an FLR (PCI function level reset) of a Gen8 Intel >>> HD graphics device, there's no VGA output from the device, no matter what I >>> try to do. I've had coreboot reset the graphics control register, VGA >>> control, VGA display disable bit, etc. >>> >>> Has anyone seen anything like this? The only way I can get VGA restored >>> is by performing a system-level reset. But I just want to do an FLR. Any >>> ideas? >>> >>> Thanks, >>> JP >>> >>> -- >>> coreboot mailing list: coreboot(a)coreboot.org >>> https://www.coreboot.org/mailman/listinfo/coreboot >>> >> >> >

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Re: [coreboot] Question about Intel HD graphics and FLR
by Joshua Pincus 30 Mar '17

30 Mar '17

Hi Zoran, Thanks for your reply. My situation is this: When the VM guest comes up the first time from a system-level reset (aka power on), the Broadwell HD graphics device runs fine. I see basic VGA both before and during the boot of Windows. Once Windows boots, the HD graphics device is configured by Intel's driver and I see hi-rez output. On a reboot of Windows within the VM, an FLR is issued. When the guest comes back up, no VGA. Windows does boot but provides no VGA output. If Windows needs to drop into VGA mode so that a user can access the real-mode functionality of the recovery console, still no VGA. It's only on Broadwell-based boards that we have this problem. If we issue FLRs during the reset of the PCI bus for older Intel boards, no problem. We get VGA. Something involved with the FLR is messing up the state of the hardware instead of actually returning the hardware to a virgin state, akin to what you would get from a full system reset. I was wondering if anyone had seen this kind of behavior. We've tried everything. We've manipulated all of the obvious HD graphics MMIO registers involved with restoring VGA but nothing seems to work. Thanks, JP On Thu, Mar 30, 2017 at 4:29 AM, Zoran Stojsavljevic < zoran.stojsavljevic(a)gmail.com> wrote: > Hello Joshua, > > I'll ask similar question, considering UEFI (BIOS). I have no idea if you > can issue somehow easy FLR (PCI Function Level Reset), but if you can, > does this use case repeat itself? > > I found, related to BIOS, this pointer (http://www.tomshardware.co. > uk/forum/278002-30-solved-what-capability-option-bios), since I do NOT > recall this option in any (legacy and UEFI) of the BIOSes I used (and I > used lot (>100) of them). Probably, did not pay too much attention, since I > do not recall this option to be tested/used?! > > Zoran > > On Wed, Mar 29, 2017 at 10:49 PM, Joshua Pincus <joshua.pincus(a)gmail.com> > wrote: > >> Hi, >> >> After performing just an FLR (PCI function level reset) of a Gen8 Intel >> HD graphics device, there's no VGA output from the device, no matter what I >> try to do. I've had coreboot reset the graphics control register, VGA >> control, VGA display disable bit, etc. >> >> Has anyone seen anything like this? The only way I can get VGA restored >> is by performing a system-level reset. But I just want to do an FLR. Any >> ideas? >> >> Thanks, >> JP >> >> -- >> coreboot mailing list: coreboot(a)coreboot.org >> https://www.coreboot.org/mailman/listinfo/coreboot >> > >

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Re: [coreboot] Lenovo Thinkpad X201: Coreboot incompatible with me_cleaner
by Denis 'GNUtoo' Carikli 30 Mar '17

30 Mar '17

On Tue, 21 Mar 2017 14:19:18 +0000 Sam Kuper <sam.kuper(a)uclmail.net> wrote: > Dear all, Hi, > Nicola Corna pointed out to me that adding a timeout at > https://github.com/coreboot/coreboot/blob/master/src/northbridge/intel/neha… > might solve this problem. > > (I guess the idea is that instead of waiting indefinitely for the ME > to load, Coreboot should instead just wait for a defined amount of > time and then plough on regardless.) > > I am not a C programmer, so am not competent to add that timeout. Adding the timeout is easy, however I'm not sure how much we should wait. I used one second to be large but I've no idea if it's enough or not. > Please can anyone here provide a suitable patch for me to test, or > failing that, point me to a similar timeout in another architecture's > raminit that I might use as a starting point? I'll send one. I didn't check for typos or spelling yet in the commit message. Denis.

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Re: [coreboot] Coreboot wiki: what license is the content under?
by Patrick Georgi 30 Mar '17

30 Mar '17

The wiki is mostly dead, its data mostly useless. Whatever we'll build as its replacement can start with a new, clear license system, and wiki content is either relicensed by its author and then ported over or deleted/rewritten. I'd go with CC-BY for the simple reason that documentation acts as marketing material which should see the widest distribution possible. People who dislike licensing their content that freely can publish elsewhere and set up a (CC-BY'd) link. In any case, we can (and IMHO should) decouple the discussions about dealing with current content and about future licensing. Patrick -- Google Germany GmbH, ABC-Str. 19, 20354 Hamburg Registergericht und -nummer: Hamburg, HRB 86891, Sitz der Gesellschaft: Hamburg Geschäftsführer: Matthew Scott Sucherman, Paul Terence Manicle

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Re: [coreboot] Coreboot wiki: what license is the content under?
by Dumitru Ursu 30 Mar '17

30 Mar '17

On 03/22/2017 12:39 AM, Martin Roth wrote: > I guess I dislike this as a reason for choosing our license. If some > future Stack Exchange replacement comes along using a different > license, what then? We're stuck with what we've already picked. To work around this, either the rights should be transferred to Coreboot (if it has a legal entity that is), or you can license it with something like "CC-BY-SA 3.0 or later" Dima.

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Re: [coreboot] SPI Flash does not work on Intel LeafHill CRB
by Goetz Salzmann 30 Mar '17

30 Mar '17

Dear Toan, > I tried as your suggestion: flashed an 8 MB Intel-provided image, read > back from SPI chip right after flashing, got a 16 MB file (since SPI > chip is 16 MB size). > The first 8 MB of 2 files are exactly the same. So, flashing should > work fine. that's your problem right there. The last 128kB of the SPI flash will be mapped to the End ot 1MB, there the CPU will start executing. In your case, that's not the IBB / coreboot, but zeros (ok, maybe 0xFFs). You have to rebuild your image for the correct flash size. Have fun, Goetz.

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Re: [coreboot] Question about Intel HD graphics and FLR
by Zoran Stojsavljevic 30 Mar '17

30 Mar '17

Hello Joshua, I'll ask similar question, considering UEFI (BIOS). I have no idea if you can issue somehow easy FLR (PCI Function Level Reset), but if you can, does this use case repeat itself? I found, related to BIOS, this pointer ( http://www.tomshardware.co.uk/forum/278002-30-solved-what-capability-option…), since I do NOT recall this option in any (legacy and UEFI) of the BIOSes I used (and I used lot (>100) of them). Probably, did not pay too much attention, since I do not recall this option to be tested/used?! Zoran On Wed, Mar 29, 2017 at 10:49 PM, Joshua Pincus <joshua.pincus(a)gmail.com> wrote: > Hi, > > After performing just an FLR (PCI function level reset) of a Gen8 Intel HD > graphics device, there's no VGA output from the device, no matter what I > try to do. I've had coreboot reset the graphics control register, VGA > control, VGA display disable bit, etc. > > Has anyone seen anything like this? The only way I can get VGA restored > is by performing a system-level reset. But I just want to do an FLR. Any > ideas? > > Thanks, > JP > > -- > coreboot mailing list: coreboot(a)coreboot.org > https://www.coreboot.org/mailman/listinfo/coreboot >

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Re: [coreboot] SPI Flash does not work on Intel LeafHill CRB
by Andrey Petrov 30 Mar '17

30 Mar '17

Hi, On 03/29/2017 07:52 PM, Toan Le manh wrote: > Hi Andrey, > > Even I tried flashing with IFWI .bin file released by Intel, the board > still doesn't boot. ah, I think I misunderstood you. You were saying even stock Intel-provided image didn't work. If that is the case yes, probably flashing is the issue. Can you try to read back from flash image right after flashing? Then compare it to the file you wanted to flash. This way you can tell if flashing works. Andrey

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coreboot March 2017