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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Xen fails to resume on AMD Fam15h (and Fam17h?) because of CPUID mismatch
February 11, 2020 9:09 PM, "Marek Marczykowski-Górecki" <marmarek@xxxxxxxxxxxxxxxxxxxxxx> wrote: > On Tue, Feb 11, 2020 at 12:59:22PM +0000, Claudia wrote: > >> February 10, 2020 12:14 PM, "Marek Marczykowski-Górecki" >> <marmarek@xxxxxxxxxxxxxxxxxxxxxx> wrote: >> >> On Mon, Feb 10, 2020 at 11:17:34AM +0000, Andrew Cooper wrote: >> >> On 10/02/2020 08:55, Jan Beulich wrote: >> On 10.02.2020 00:06, Marek Marczykowski-Górecki wrote: >> Hi, >> >> Multiple Qubes users have reported issues with resuming from S3 on AMD >> systems (Ryzen 2500U, Ryzen Pro 3700U, maybe more). The error message >> is: >> >> (XEN) CPU0: cap[ 1] is 7ed8320b (expected f6d8320b) >> >> If I read it right, this is: >> - OSXSAVE: 0 -> 1 >> - HYPERVISOR: 1 -> 0 >> >> Commenting out the panic on a failed recheck_cpu_features() in power.c >> makes the system work after resume, reportedly stable. But that doesn't >> sounds like a good idea generally. >> >> Is this difference a Xen fault (some missing MSR / other register >> restore on resume)? Or BIOS vendor / AMD, that could be worked around in >> Xen? >> The transition of the HYPERVISOR bit is definitely a Xen issue, >> with Andrew having sent a patch already (iirc). >> >> https://lore.kernel.org/xen-devel/20200127202121.2961-1-andrew.cooper3@xxxxxxxxxx >> >> Code is correct. Commit message needs rework, including in light of >> this discovery. (I may eventually split it into two patches.) >> >> Claudia, do you want to test with this patch? >> >> I'm getting hunk failed in domctl.c applying to R4.1 default repo (fc31, Xen >> 4.13). I'll see if I >> can fix it but bear with me, I'm new at this. >> >> Marek: Would you by any chance be willing to merge this into a test branch >> on your repo, so the >> rest of us can pull it directly into qubes-builder? It'll take you a >> fraction of the time it'll >> take me, plus then zachm and awokd and anyone else can pull it also. > > Here is one for Xen 4.13: > https://github.com/QubesOS/qubes-vmm-xen/pull/71 > builder.conf snippet for qubes-builder: > > BRANCH_vmm_xen=xen-4.13-amd-suspend > GIT_URL_vmm_xen=https://github.com/marmarek/qubes-vmm-xen > > This is already v2 patch from the other thread. Thanks! For anyone else trying this, I also had to add NO_CHECK=vmm-xen vmm-xen-stubdom-legacy, I guess because there are no tags on that branch. The RPMs built successfully, and I'll be able to test them as soon as I get the latest R4.1 build downloaded and installed (I'm currently running 4.0). _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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