From: Thomas Lamprecht Date: Sat, 6 Apr 2019 11:57:00 +0000 (+0200) Subject: qm: bios/efi: explain what they even do, roughly X-Git-Url: https://git.proxmox.com/?p=pve-docs.git;a=commitdiff_plain;h=55ce3375092431c754ec63533179a1be4bc51850 qm: bios/efi: explain what they even do, roughly Signed-off-by: Thomas Lamprecht --- diff --git a/qm.adoc b/qm.adoc index cf39226..468e372 100644 --- a/qm.adoc +++ b/qm.adoc @@ -699,8 +699,12 @@ BIOS and UEFI ~~~~~~~~~~~~~ In order to properly emulate a computer, QEMU needs to use a firmware. -By default QEMU uses *SeaBIOS* for this, which is an open-source, x86 BIOS -implementation. SeaBIOS is a good choice for most standard setups. +Which, on common PCs often known as BIOS or (U)EFI, is executed as one of the +first steps when booting a VM. It is responsible for doing basic hardware +initialization and for providing an interface to the firmware and hardware for +the operating system. By default QEMU uses *SeaBIOS* for this, which is an +open-source, x86 BIOS implementation. SeaBIOS is a good choice for most +standard setups. There are, however, some scenarios in which a BIOS is not a good firmware to boot from, e.g. if you want to do VGA passthrough. footnote:[Alex Williamson has a very good blog entry about this.