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author | Toshi Kani <toshi.kani@hpe.com> | 2016-03-23 15:42:02 -0600 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-03-29 12:23:27 +0200 |
commit | 88ba281108ed0c25c9d292b48bd3f272fcb90dd0 (patch) | |
tree | ce2d80c323fc16c934de6296221084158ede87e3 /Documentation/x86/pat.txt | |
parent | ad025a73f0e9344ac73ffe1b74c184033e08e7d5 (diff) | |
download | linux-88ba281108ed0c25c9d292b48bd3f272fcb90dd0.tar.gz linux-88ba281108ed0c25c9d292b48bd3f272fcb90dd0.tar.bz2 linux-88ba281108ed0c25c9d292b48bd3f272fcb90dd0.zip |
x86/xen, pat: Remove PAT table init code from Xen
Xen supports PAT without MTRRs for its guests. In order to
enable WC attribute, it was necessary for xen_start_kernel()
to call pat_init_cache_modes() to update PAT table before
starting guest kernel.
Now that the kernel initializes PAT table to the BIOS handoff
state when MTRR is disabled, this Xen-specific PAT init code
is no longer necessary. Delete it from xen_start_kernel().
Also change __init_cache_modes() to a static function since
PAT table should not be tweaked by other modules.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Juergen Gross <jgross@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: elliott@hpe.com
Cc: paul.gortmaker@windriver.com
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1458769323-24491-7-git-send-email-toshi.kani@hpe.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/x86/pat.txt')
0 files changed, 0 insertions, 0 deletions