The patch titled
Subject: x86/mm/pat: cpa-test: fix length for CPA_ARRAY test
has been added to the -mm mm-unstable branch. Its filename is
x86-mm-pat-cpa-test-fix-length-for-cpa_array-test.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/x86-mm-pat-cpa-test-fix-length-for-cpa_array-test.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Mike Rapoport (Microsoft)" <rppt@xxxxxxxxxx>
Subject: x86/mm/pat: cpa-test: fix length for CPA_ARRAY test
Date: Fri, 27 Dec 2024 09:28:18 +0200
Patch series "x86/module: rework ROX cache to avoid writable copy".
Following Peter's comments [1] these patches rework handling of ROX caches
for module text allocations.
Instead of using a writable copy that really complicates alternatives
patching, temporarily remap parts of a large ROX page as RW for the time
of module formation and then restore it's ROX protections when the module
is ready.
To keep the ROX memory mapped with large pages, make set_memory code
capable of restoring large pages (more details are in patch 3).
The patches also available in git
https://git.kernel.org/rppt/h/execmem/x86-rox/v8
[1] https://lore.kernel.org/all/20241209083818.GK8562@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
This patch (of 8):
The CPA_ARRAY test always uses len[1] as numpages argument to
change_page_attr_set() although the addresses array is different each
iteration of the test loop.
Replace len[1] with len[i] to have numpages matching the addresses array.
Link: https://lkml.kernel.org/r/20241227072825.1288491-1-rppt@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20241227072825.1288491-2-rppt@xxxxxxxxxx
Fixes: ecc729f1f471 ("x86/mm/cpa: Add ARRAY and PAGES_ARRAY selftests")
Signed-off-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brendan Higgins <brendan.higgins@xxxxxxxxx>
Cc: Daniel Gomez <da.gomez@xxxxxxxxxxx>
Cc: Daniel Thompson <danielt@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Gow <davidgow@xxxxxxxxxx>
Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jason Wessel <jason.wessel@xxxxxxxxxxxxx>
Cc: Jiri Kosina <jikos@xxxxxxxxxx>
Cc: Joe Lawrence <joe.lawrence@xxxxxxxxxx>
Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Miroslav Benes <mbenes@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Cc: Petr Pavlu <petr.pavlu@xxxxxxxx>
Cc: Rae Moar <rmoar@xxxxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Cc: Song Liu <song@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/pat/cpa-test.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/mm/pat/cpa-test.c~x86-mm-pat-cpa-test-fix-length-for-cpa_array-test
+++ a/arch/x86/mm/pat/cpa-test.c
@@ -183,7 +183,7 @@ static int pageattr_test(void)
break;
case 1:
- err = change_page_attr_set(addrs, len[1], PAGE_CPA_TEST, 1);
+ err = change_page_attr_set(addrs, len[i], PAGE_CPA_TEST, 1);
break;
case 2:
_
Patches currently in -mm which might be from rppt@xxxxxxxxxx are
x86-mm-pat-cpa-test-fix-length-for-cpa_array-test.patch
x86-mm-pat-drop-duplicate-variable-in-cpa_flush.patch
execmem-add-api-for-temporal-remapping-as-rw-and-restoring-rox-afterwards.patch
module-introduce-module_state_gone.patch
modules-switch-to-execmem-api-for-remapping-as-rw-and-restoring-rox.patch
revert-x86-module-prepare-module-loading-for-rox-allocations-of-text.patch
module-drop-unused-module_writable_address.patch
