Commit 9325b8b5 authored by Lorenzo Stoakes's avatar Lorenzo Stoakes Committed by Andrew Morton
Browse files

tools: add skeleton code for userland testing of VMA logic 

Establish a new userland VMA unit testing implementation under
tools/testing which utilises existing logic providing maple tree support
in userland utilising the now-shared code previously exclusive to radix
tree testing.

This provides fundamental VMA operations whose API is defined in mm/vma.h,
while stubbing out superfluous functionality.

This exists as a proof-of-concept, with the test implementation functional
and sufficient to allow userland compilation of vma.c, but containing only
cursory tests to demonstrate basic functionality.

Link: https://lkml.kernel.org/r/533ffa2eec771cbe6b387dd049a7f128a53eb616.1722251717.git.lorenzo.stoakes@oracle.com


Signed-off-by: default avatarLorenzo Stoakes <lorenzo.stoakes@oracle.com>
Tested-by: default avatarSeongJae Park <sj@kernel.org>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
Reviewed-by: default avatarLiam R. Howlett <Liam.Howlett@oracle.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: David Gow <davidgow@google.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Kees Cook <kees@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Rae Moar <rmoar@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Pengfei Xu <pengfei.xu@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 74579d8d

MAINTAINERS

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@@ -24423,6 +24423,7 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 
F:	mm/vma.c

F:	mm/vma.h

F:	mm/vma_internal.h

F:	tools/testing/vma/









VMALLOC









M:	Andrew Morton <akpm@linux-foundation.org>

























tools/testing/vma/.gitignore
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# SPDX-License-Identifier: GPL-2.0-only









generated/bit-length.h









generated/map-shift.h









generated/autoconf.h









idr.c









radix-tree.c









vma
























tools/testing/vma/Makefile
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# SPDX-License-Identifier: GPL-2.0-or-later



















.PHONY: default



















default: vma



















include ../shared/shared.mk



















OFILES = $(SHARED_OFILES) vma.o maple-shim.o









TARGETS = vma



















vma:	$(OFILES) vma_internal.h ../../../mm/vma.c ../../../mm/vma.h









	$(CC) $(CFLAGS) -o $@ $(OFILES) $(LDLIBS)



















clean:









	$(RM) $(TARGETS) *.o radix-tree.c idr.c generated/map-shift.h generated/bit-length.h generated/autoconf.h
























tools/testing/vma/linux/atomic.h
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+12
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/* SPDX-License-Identifier: GPL-2.0-or-later */



















#ifndef _LINUX_ATOMIC_H









#define _LINUX_ATOMIC_H



















#define atomic_t int32_t









#define atomic_inc(x) uatomic_inc(x)









#define atomic_read(x) uatomic_read(x)









#define atomic_set(x, y) do {} while (0)









#define U8_MAX UCHAR_MAX



















#endif	/* _LINUX_ATOMIC_H */
























tools/testing/vma/linux/mmzone.h
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/* SPDX-License-Identifier: GPL-2.0-or-later */



















#ifndef _LINUX_MMZONE_H









#define _LINUX_MMZONE_H



















#include <linux/atomic.h>



















struct pglist_data *first_online_pgdat(void);









struct pglist_data *next_online_pgdat(struct pglist_data *pgdat);



















#define for_each_online_pgdat(pgdat)			\









	for (pgdat = first_online_pgdat();		\









	     pgdat;					\









	     pgdat = next_online_pgdat(pgdat))



















enum zone_type {









	__MAX_NR_ZONES









};



















#define MAX_NR_ZONES __MAX_NR_ZONES









#define MAX_PAGE_ORDER 10









#define MAX_ORDER_NR_PAGES (1 << MAX_PAGE_ORDER)



















#define pageblock_order		MAX_PAGE_ORDER









#define pageblock_nr_pages	BIT(pageblock_order)









#define pageblock_align(pfn)	ALIGN((pfn), pageblock_nr_pages)









#define pageblock_start_pfn(pfn)	ALIGN_DOWN((pfn), pageblock_nr_pages)



















struct zone {









	atomic_long_t		managed_pages;









};



















typedef struct pglist_data {









	struct zone node_zones[MAX_NR_ZONES];



















} pg_data_t;



















#endif /* _LINUX_MMZONE_H */