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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-02-21 04:13:00 -05:00
b2466bb3b4
Introduce a test that registers a range of memory for UFFDIO_WRITEPROTECT_MODE_WP without UFFD_FEATURE_EVENT_REMAP. First check that the uffd-wp bit is set for every PTE in the range. Then mremap() the range to a new location and check that the uffd-wp bit is clear for every PTE in the range. Run the test for small folios, all supported THP sizes and all supported hugetlb sizes, and for swapped out memory, shared and private. There was previously a bug in the kernel where the uffd-wp bits remained set in all PTEs for this case, after fixing the kernel, the tests all pass. Link: https://lkml.kernel.org/r/20250107144755.1871363-3-ryan.roberts@arm.com Signed-off-by: Ryan Roberts <ryan.roberts@arm.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jann Horn <jannh@google.com> Cc: Liam R. Howlett <Liam.Howlett@Oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Muchun Song <muchun.song@linux.dev> 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>
250 lines
7.5 KiB
Makefile
250 lines
7.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# Makefile for mm selftests
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LOCAL_HDRS += $(selfdir)/mm/local_config.h $(top_srcdir)/mm/gup_test.h
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LOCAL_HDRS += $(selfdir)/mm/mseal_helpers.h
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include local_config.mk
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ifeq ($(ARCH),)
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ifeq ($(CROSS_COMPILE),)
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uname_M := $(shell uname -m 2>/dev/null || echo not)
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else
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uname_M := $(shell echo $(CROSS_COMPILE) | grep -o '^[a-z0-9]\+')
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endif
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ARCH ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/' -e 's/ppc64.*/powerpc/')
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endif
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# Without this, failed build products remain, with up-to-date timestamps,
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# thus tricking Make (and you!) into believing that All Is Well, in subsequent
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# make invocations:
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.DELETE_ON_ERROR:
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# Avoid accidental wrong builds, due to built-in rules working just a little
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# bit too well--but not quite as well as required for our situation here.
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#
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# In other words, "make $SOME_TEST" is supposed to fail to build at all,
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# because this Makefile only supports either "make" (all), or "make /full/path".
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# However, the built-in rules, if not suppressed, will pick up CFLAGS and the
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# initial LDLIBS (but not the target-specific LDLIBS, because those are only
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# set for the full path target!). This causes it to get pretty far into building
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# things despite using incorrect values such as an *occasionally* incomplete
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# LDLIBS.
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MAKEFLAGS += --no-builtin-rules
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CFLAGS = -Wall -O2 -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES)
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LDLIBS = -lrt -lpthread -lm
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# Some distributions (such as Ubuntu) configure GCC so that _FORTIFY_SOURCE is
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# automatically enabled at -O1 or above. This triggers various unused-result
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# warnings where functions such as read() or write() are called and their
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# return value is not checked. Disable _FORTIFY_SOURCE to silence those
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# warnings.
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CFLAGS += -U_FORTIFY_SOURCE
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KDIR ?= /lib/modules/$(shell uname -r)/build
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ifneq (,$(wildcard $(KDIR)/Module.symvers))
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ifneq (,$(wildcard $(KDIR)/include/linux/page_frag_cache.h))
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TEST_GEN_MODS_DIR := page_frag
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else
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PAGE_FRAG_WARNING = "missing page_frag_cache.h, please use a newer kernel"
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endif
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else
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PAGE_FRAG_WARNING = "missing Module.symvers, please have the kernel built first"
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endif
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TEST_GEN_FILES = cow
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TEST_GEN_FILES += compaction_test
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TEST_GEN_FILES += gup_longterm
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TEST_GEN_FILES += gup_test
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TEST_GEN_FILES += hmm-tests
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TEST_GEN_FILES += hugetlb-madvise
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TEST_GEN_FILES += hugetlb-read-hwpoison
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TEST_GEN_FILES += hugetlb-soft-offline
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TEST_GEN_FILES += hugepage-mmap
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TEST_GEN_FILES += hugepage-mremap
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TEST_GEN_FILES += hugepage-shm
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TEST_GEN_FILES += hugepage-vmemmap
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TEST_GEN_FILES += khugepaged
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TEST_GEN_FILES += madv_populate
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TEST_GEN_FILES += map_fixed_noreplace
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TEST_GEN_FILES += map_hugetlb
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TEST_GEN_FILES += map_populate
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ifneq (,$(filter $(ARCH),arm64 riscv riscv64 x86 x86_64))
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TEST_GEN_FILES += memfd_secret
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endif
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TEST_GEN_FILES += migration
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TEST_GEN_FILES += mkdirty
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TEST_GEN_FILES += mlock-random-test
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TEST_GEN_FILES += mlock2-tests
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TEST_GEN_FILES += mrelease_test
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TEST_GEN_FILES += mremap_dontunmap
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TEST_GEN_FILES += mremap_test
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TEST_GEN_FILES += mseal_test
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TEST_GEN_FILES += on-fault-limit
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TEST_GEN_FILES += pagemap_ioctl
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TEST_GEN_FILES += thuge-gen
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TEST_GEN_FILES += transhuge-stress
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TEST_GEN_FILES += uffd-stress
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TEST_GEN_FILES += uffd-unit-tests
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TEST_GEN_FILES += uffd-wp-mremap
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TEST_GEN_FILES += split_huge_page_test
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TEST_GEN_FILES += ksm_tests
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TEST_GEN_FILES += ksm_functional_tests
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TEST_GEN_FILES += mdwe_test
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TEST_GEN_FILES += hugetlb_fault_after_madv
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TEST_GEN_FILES += hugetlb_madv_vs_map
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TEST_GEN_FILES += hugetlb_dio
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TEST_GEN_FILES += droppable
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TEST_GEN_FILES += guard-pages
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ifneq ($(ARCH),arm64)
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TEST_GEN_FILES += soft-dirty
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endif
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ifeq ($(ARCH),x86_64)
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CAN_BUILD_I386 := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_32bit_program.c -m32)
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CAN_BUILD_X86_64 := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_64bit_program.c)
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CAN_BUILD_WITH_NOPIE := $(shell ./../x86/check_cc.sh "$(CC)" ../x86/trivial_program.c -no-pie)
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VMTARGETS := protection_keys
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VMTARGETS += pkey_sighandler_tests
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BINARIES_32 := $(VMTARGETS:%=%_32)
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BINARIES_64 := $(VMTARGETS:%=%_64)
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ifeq ($(CAN_BUILD_WITH_NOPIE),1)
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CFLAGS += -no-pie
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endif
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ifeq ($(CAN_BUILD_I386),1)
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TEST_GEN_FILES += $(BINARIES_32)
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endif
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ifeq ($(CAN_BUILD_X86_64),1)
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TEST_GEN_FILES += $(BINARIES_64)
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endif
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else ifeq ($(ARCH),arm64)
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TEST_GEN_FILES += protection_keys
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TEST_GEN_FILES += pkey_sighandler_tests
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else ifeq ($(ARCH),powerpc)
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TEST_GEN_FILES += protection_keys
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endif
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ifneq (,$(filter $(ARCH),arm64 mips64 parisc64 powerpc riscv64 s390x sparc64 x86_64 s390))
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TEST_GEN_FILES += va_high_addr_switch
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ifneq ($(ARCH),riscv64)
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TEST_GEN_FILES += virtual_address_range
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endif
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TEST_GEN_FILES += write_to_hugetlbfs
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endif
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TEST_PROGS := run_vmtests.sh
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TEST_FILES := test_vmalloc.sh
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TEST_FILES += test_hmm.sh
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TEST_FILES += va_high_addr_switch.sh
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TEST_FILES += charge_reserved_hugetlb.sh
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TEST_FILES += hugetlb_reparenting_test.sh
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TEST_FILES += test_page_frag.sh
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# required by charge_reserved_hugetlb.sh
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TEST_FILES += write_hugetlb_memory.sh
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include ../lib.mk
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$(TEST_GEN_PROGS): vm_util.c thp_settings.c
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$(TEST_GEN_FILES): vm_util.c thp_settings.c
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$(OUTPUT)/uffd-stress: uffd-common.c
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$(OUTPUT)/uffd-unit-tests: uffd-common.c
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$(OUTPUT)/uffd-wp-mremap: uffd-common.c
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$(OUTPUT)/protection_keys: pkey_util.c
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$(OUTPUT)/pkey_sighandler_tests: pkey_util.c
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ifeq ($(ARCH),x86_64)
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BINARIES_32 := $(patsubst %,$(OUTPUT)/%,$(BINARIES_32))
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BINARIES_64 := $(patsubst %,$(OUTPUT)/%,$(BINARIES_64))
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$(BINARIES_32) $(BINARIES_64): pkey_util.c
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define gen-target-rule-32
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$(1) $(1)_32: $(OUTPUT)/$(1)_32
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.PHONY: $(1) $(1)_32
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endef
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define gen-target-rule-64
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$(1) $(1)_64: $(OUTPUT)/$(1)_64
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.PHONY: $(1) $(1)_64
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endef
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ifeq ($(CAN_BUILD_I386),1)
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$(BINARIES_32): CFLAGS += -m32 -mxsave
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$(BINARIES_32): LDLIBS += -lrt -ldl -lm
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$(BINARIES_32): $(OUTPUT)/%_32: %.c
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$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(notdir $^) $(LDLIBS) -o $@
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$(foreach t,$(VMTARGETS),$(eval $(call gen-target-rule-32,$(t))))
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endif
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ifeq ($(CAN_BUILD_X86_64),1)
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$(BINARIES_64): CFLAGS += -m64 -mxsave
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$(BINARIES_64): LDLIBS += -lrt -ldl
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$(BINARIES_64): $(OUTPUT)/%_64: %.c
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$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(notdir $^) $(LDLIBS) -o $@
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$(foreach t,$(VMTARGETS),$(eval $(call gen-target-rule-64,$(t))))
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endif
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# x86_64 users should be encouraged to install 32-bit libraries
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ifeq ($(CAN_BUILD_I386)$(CAN_BUILD_X86_64),01)
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all: warn_32bit_failure
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warn_32bit_failure:
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@echo "Warning: you seem to have a broken 32-bit build" 2>&1; \
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echo "environment. This will reduce test coverage of 64-bit" 2>&1; \
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echo "kernels. If you are using a Debian-like distribution," 2>&1; \
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echo "try:"; 2>&1; \
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echo ""; \
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echo " apt-get install gcc-multilib libc6-i386 libc6-dev-i386"; \
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echo ""; \
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echo "If you are using a Fedora-like distribution, try:"; \
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echo ""; \
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echo " yum install glibc-devel.*i686"; \
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exit 0;
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endif
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endif
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# IOURING_EXTRA_LIBS may get set in local_config.mk, or it may be left empty.
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$(OUTPUT)/cow: LDLIBS += $(IOURING_EXTRA_LIBS)
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$(OUTPUT)/gup_longterm: LDLIBS += $(IOURING_EXTRA_LIBS)
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$(OUTPUT)/mlock-random-test $(OUTPUT)/memfd_secret: LDLIBS += -lcap
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$(OUTPUT)/ksm_tests: LDLIBS += -lnuma
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$(OUTPUT)/migration: LDLIBS += -lnuma
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local_config.mk local_config.h: check_config.sh
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/bin/sh ./check_config.sh $(CC)
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EXTRA_CLEAN += local_config.mk local_config.h
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ifeq ($(IOURING_EXTRA_LIBS),)
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all: warn_missing_liburing
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warn_missing_liburing:
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@echo ; \
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echo "Warning: missing liburing support. Some tests will be skipped." ; \
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echo
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endif
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ifneq ($(PAGE_FRAG_WARNING),)
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all: warn_missing_page_frag
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warn_missing_page_frag:
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@echo ; \
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echo "Warning: $(PAGE_FRAG_WARNING). page_frag test will be skipped." ; \
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echo
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endif
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