Date: Fri, 18 Jan 2019 07:50:55 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 222996] FreeBSD 11.1-12 on Hyper-V with PCI Express Pass Through Message-ID: <bug-222996-27103-60xa14pPjF@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-222996-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-222996-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222996 --- Comment #17 from Wei Hu <weh@microsoft.com> --- It turns out the address between 0xf8000000 and 0xf87fffff on HyperV doesn't work for MMIO or FreeBSD has bug to incorrectly assign device MMIO address = to this range. When manually assign the em0 MMIO address to and above 0xf88000= 00, the passthrough NIC works fine.=20 On same Gen 2 Linux VM, the device was assigned MMIO address above this ran= ge. On Gen 1 FreeBSD VM, the same card was assigned to an address above 4G. So = both of these works fine.=20 The workaround I am using is intercepting the memory allocation request, changing the starting address to 0xf8800000 whenever find a request fall in= to this problem range. This works fine on customer's site. However still need = to root cause the issue when this only happens on FreeBSD Gen 2 VMs, not other Linux Gen 2 VMs. --=20 You are receiving this mail because: You are the assignee for the bug.=
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