Date: Sun, 08 Nov 2020 20:45:33 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 250802] bhyve exited with status 134 when GPU PCI passthrough Message-ID: <bug-250802-27103-1er9ovs7iX@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-250802-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-250802-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250802 --- Comment #35 from Konstantin Belousov <kib@FreeBSD.org> --- (In reply to mr.xanto from comment #34) Ok, so D27138 cannot work because BARs are not mapped into userspace, and patch caused infinite recursion. Not to mention Peter' objection. Lets try to see why EPT violation was translated to instruction assist instead of being handled by vm_fault(). First, you use stable/12 and you do not have debugging turned on. Please enable at least INVARIANTS in your kernel. Second, I do not see how to find the cause except by some debugging. Apply the following patch for start and report if the printf triggered diff --git a/sys/amd64/vmm/vmm.c b/sys/amd64/vmm/vmm.c index 3a1d0d54bca..1e715d458a9 100644 --- a/sys/amd64/vmm/vmm.c +++ b/sys/amd64/vmm/vmm.c @@ -650,6 +650,7 @@ vm_mem_allocated(struct vm *vm, int vcpuid, vm_paddr_t gpa) return (true); /* 'gpa' is sysmem or devmem */ } +if (gpa >= 0xd0000000 && gpa < 0xe0000000) printf("ppt_is_mmio %#lx %d\n", gpa, ppt_is_mmio(vm, gpa)); if (ppt_is_mmio(vm, gpa)) return (true); /* 'gpa' is pci passthru mmio */ -- You are receiving this mail because: You are the assignee for the bug.
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