From 8b0eac76421bd55bab2a542a77f40db78f2b7bad Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Mon, 10 Sep 2012 11:13:56 +0100 Subject: docs: document "ucode=" hypervisor command line option Signed-off-by: Jan Beulich Acked-by: Ian Campbell Committed-by: Ian Campbell --- docs/misc/xen-command-line.markdown | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'docs/misc') diff --git a/docs/misc/xen-command-line.markdown b/docs/misc/xen-command-line.markdown index b3f176cbdc..eff930f7f8 100644 --- a/docs/misc/xen-command-line.markdown +++ b/docs/misc/xen-command-line.markdown @@ -785,6 +785,19 @@ pages) must also be specified via the tbuf\_size parameter. > `= unstable | skewed` ### ucode +> `= ` + +Specify the CPU microcode update blob module index. When positive, this +specifies the n-th module (in the GrUB entry, zero based) to be used +for updating CPU micrcode. When negative, counting starts at the end of +the modules in the GrUB entry (so with the blob commonly being last, +one could specify `ucode=-1`). Note that the value of zero is not valid +here (entry zero, i.e. the first module, is always the Dom0 kernel +image). Note further that use of this option has an unspecified effect +when used with xen.efi (there the concept of modules doesn't exist, and +the blob gets specified via the `ucode=` config file/section +entry; see [EFI configuration file description](efi.html)). + ### unrestricted\_guest > `= ` -- cgit v1.2.3