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=3D250802 --- 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 p= atch caused infinite recursion. Not to mention Peter' objection. Lets try to see why EPT violation was translated to instruction assist inst= ead 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 devme= m */ } +if (gpa >=3D 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 mm= io */ --=20 You are receiving this mail because: You are the assignee for the bug.=
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