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authorDavid Hildenbrand <david@redhat.com>2022-09-27 14:01:19 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-11-09 04:37:15 +0300
commitc77369b437f983a862bb6741814670d4ad38478c (patch)
treee11a0e49d999f6622a13ce5fcd3e4846b3b8cbd5 /mm/gup_test.h
parente487ebbd12986facc7f77129d3ca80de84841170 (diff)
downloadlinux-c77369b437f983a862bb6741814670d4ad38478c.tar.xz
mm/gup_test: start/stop/read functionality for PIN LONGTERM test
We want an easy way to take a R/O or R/W longterm pin on a range and be able to observe the content of the pinned pages, so we can properly test how longterm puns interact with our COW logic. [david@redhat.com: silence a warning on 32-bit] Link: https://lkml.kernel.org/r/74adbb51-6e33-f636-8a9c-2ad87bd9007e@redhat.com [yang.lee@linux.alibaba.com: ./mm/gup_test.c:281:2-3: Unneeded semicolon] Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2455 Link: https://lkml.kernel.org/r/20221020024035.113619-1-yang.lee@linux.alibaba.com Link: https://lkml.kernel.org/r/20220927110120.106906-7-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Yang Li <yang.lee@linux.alibaba.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Christoph von Recklinghausen <crecklin@redhat.com> Cc: Don Dutile <ddutile@redhat.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Nadav Amit <namit@vmware.com> Cc: Peter Xu <peterx@redhat.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/gup_test.h')
-rw-r--r--mm/gup_test.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/mm/gup_test.h b/mm/gup_test.h
index 887ac1d5f5bc..5b37b54e8bea 100644
--- a/mm/gup_test.h
+++ b/mm/gup_test.h
@@ -10,6 +10,9 @@
#define GUP_BASIC_TEST _IOWR('g', 4, struct gup_test)
#define PIN_BASIC_TEST _IOWR('g', 5, struct gup_test)
#define DUMP_USER_PAGES_TEST _IOWR('g', 6, struct gup_test)
+#define PIN_LONGTERM_TEST_START _IOW('g', 7, struct pin_longterm_test)
+#define PIN_LONGTERM_TEST_STOP _IO('g', 8)
+#define PIN_LONGTERM_TEST_READ _IOW('g', 9, __u64)
#define GUP_TEST_MAX_PAGES_TO_DUMP 8
@@ -30,4 +33,13 @@ struct gup_test {
__u32 which_pages[GUP_TEST_MAX_PAGES_TO_DUMP];
};
+#define PIN_LONGTERM_TEST_FLAG_USE_WRITE 1
+#define PIN_LONGTERM_TEST_FLAG_USE_FAST 2
+
+struct pin_longterm_test {
+ __u64 addr;
+ __u64 size;
+ __u32 flags;
+};
+
#endif /* __GUP_TEST_H */