Trying to debug an HVM PCI pass-through crash coming from: https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=xen/arch/x86/hvm/svm/svm.c;h=8edc846a2ed4aec6a5711d272adbb10aaa741c27;hb=5e4598106ed02ae4b43abcb29889969eb12867b7 1536 /* Everything else is an error. */ 1537 mfn = __get_gfn_type_access(p2m, gfn, &p2mt, &p2ma, 0, NULL, 0); 1538 gdprintk(XENLOG_ERR, 1539 "SVM violation gpa %#"PRIpaddr", mfn %#lx, type %i\n", 1540 gpa, mfn_x(mfn), p2mt); 1541 domain_crash(v->domain);
Which results in: (XEN) domain_crash called from svm.c:1541 (XEN) Domain 10 (vcpu#0) crashed on cpu#2: (XEN) ------[ Xen-4.8.2 x86_64 debug=n Not tainted ]------ (XEN) CPU: 2 (XEN) RIP: 0010:[<ffffffff97405f4e>] (XEN) RFLAGS: 0000000000000296 CONTEXT: hvm guest (d10v0) (XEN) rax: 0000000000000000 rbx: ffff97c946eb95c0 rcx: 0000000000000005 (XEN) rdx: 0000000000000040 rsi: ffffaf5580700040 rdi: 0000000000000000 (XEN) rbp: ffffaf55806cb8f8 rsp: ffffaf55806cb8c8 r8: 0000000000000000 (XEN) r9: 00000000ffffff90 r10: 000000000000003f r11: 0000000000000000 (XEN) r12: 0000000000000000 r13: ffffffffc04fb7d0 r14: 0000000000000100 (XEN) r15: ffff97c946eb4028 cr0: 0000000080050033 cr4: 00000000000406f0 (XEN) cr3: 0000000012e30000 cr2: 0000000000000000 (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: 0018 cs: 0010 Here's where I get lost. Can't find the output from that gdprintk anywhere, with both loglvl=all and guest_loglvl=all. I think I want to either change it to a printk and/or enable Xen debugging, which means a recompile. What is the most newbish/straight-forward way to do that? Looks like Qubes-builder compiles Xen in chroot-fc25/home/user/rpmbuild/BUILD/xen-4.8.2. I can find and edit svm.c, but can't figure out where I should enable Xen debugging and what to do next. -- You received this message because you are subscribed to the Google Groups "qubes-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-devel/e5810c0fde4ccf12225b8bb58632a1c4.squirrel%40tt3j2x4k5ycaa5zt.onion. For more options, visit https://groups.google.com/d/optout.
