On 28/05/2019 18:06, Laszlo Ersek wrote: > On 05/28/19 17:18, Tomas Pilar (tpilar) wrote: >> Hi, >> >> I am trying to create kvm instance using libvirt and Qemu and OVMF that also >> has SMBIOS included. My current version of Qemu only supports type 0 and >> type 1 SMBIOS tables so I specify those. However, when I use smbiosview in >> the UEFI shell, I get back "SMBIOS not found". >> >> I attach my current libvirt xml specification for the kvm host. >> >> Does anyone have any immediate ideas? > The SMBIOS fw_cfg interface between QEMU and guest firmware was reworked > in the QEMU v2.1.0 release (primarily in commit c97294ec1b9e, "SMBIOS: > Build aggregate smbios tables and entry point", 2014-05-05). > > If you use an earlier QEMU release, or else you use a machine type > earlier than pc-i440fx-2.1, then the new SMBIOS fw_cfg interface is not > exposed to guest firmware. > > And, upstream OVMF never gained patches for the "legacy" SMBIOS fw_cfg > interface. I had posted patches for that in 2013, but they were not > accepted. The thread starts here: > > [edk2] [PATCH 0/3] OvmfPkg: basic SMBIOS support on QEMU > https://www.mail-archive.com/[email protected]/msg02917.html > > We (RH) carried forward these patches for quite some time in RHEL7 and > (IIRC) Fedora as well, but QEMU v2.1.0 was released in Aug 2014 if I > read the git log right, and so we too dropped the downstream-only > patches at some point, in favor of the new interface. > > Based on your libvirt domain xml... It looks likely that you use the > qemu-kvm package that is part of base RHEL7. That package is based on > upstream QEMU 1.5.3, and so it indeed lacks support for the "new" SMBIOS > interface. If you can use CentOS, you could try the qemu-kvm-ev package > instead. (That one is based on upstream 2.12.) > > Alternatively, you could check the "OVMF-20160202-2.gitd7c0dfa.el7" > package (or earlier), which should (a) still include the > above-referenced patches, and (b) still run on the 1.5.3-based qemu-kvm > emulator. (Later OVMF packages would only provide the SMM_REQUIRE > firmware binary, which does not boot on the 1.5.3-based qemu-kvm emulator.) > > Thanks > Laszlo Thank you Laszlo, that was incredibly thorough! I should be able to work with this.
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