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authorArvind Sankar <nivedita@alum.mit.edu>2020-02-02 20:13:47 +0300
committerArd Biesheuvel <ardb@kernel.org>2020-02-23 01:37:37 +0300
commit67a6af7ad1d161dbc9c139e868d5549e632923f7 (patch)
tree8de615eaa7de8d0a465c5738418ef6eb3f42ec4d /Documentation/x86/boot.rst
parent9f9223778ef385e79dc67f5ee48ee4c1fb757f6b (diff)
downloadlinux-67a6af7ad1d161dbc9c139e868d5549e632923f7.tar.xz
x86/boot: Remove KEEP_SEGMENTS support
Commit a24e785111a3 ("i386: paravirt boot sequence") added this flag for use by paravirtualized environments such as Xen. However, Xen never made use of this flag [1], and it was only ever used by lguest [2]. Commit ecda85e70277 ("x86/lguest: Remove lguest support") removed lguest, so KEEP_SEGMENTS has lost its last user. [1] https://lore.kernel.org/lkml/4D4B097C.5050405@goop.org [2] https://www.mail-archive.com/lguest@lists.ozlabs.org/msg00469.html Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> Link: https://lore.kernel.org/r/20200202171353.3736319-2-nivedita@alum.mit.edu Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'Documentation/x86/boot.rst')
-rw-r--r--Documentation/x86/boot.rst8
1 files changed, 2 insertions, 6 deletions
diff --git a/Documentation/x86/boot.rst b/Documentation/x86/boot.rst
index c9c201596c3e..fa7ddc0428c8 100644
--- a/Documentation/x86/boot.rst
+++ b/Documentation/x86/boot.rst
@@ -490,15 +490,11 @@ Protocol: 2.00+
kernel) to not write early messages that require
accessing the display hardware directly.
- Bit 6 (write): KEEP_SEGMENTS
+ Bit 6 (obsolete): KEEP_SEGMENTS
Protocol: 2.07+
- - If 0, reload the segment registers in the 32bit entry point.
- - If 1, do not reload the segment registers in the 32bit entry point.
-
- Assume that %cs %ds %ss %es are all set to flat segments with
- a base of 0 (or the equivalent for their environment).
+ - This flag is obsolete.
Bit 7 (write): CAN_USE_HEAP