mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-01-19 04:44:09 +00:00
2616b37032
Let's test some basic functionality using /dev/mem. These tests will implicitly cover some PAT (Page Attribute Handling) handling on x86. These tests will only run when /dev/mem access to the first two pages in physical address space is possible and allowed; otherwise, the tests are skipped. On current x86-64 with PAT inside a VM, all tests pass: TAP version 13 1..6 # Starting 6 tests from 1 test cases. # RUN pfnmap.madvise_disallowed ... # OK pfnmap.madvise_disallowed ok 1 pfnmap.madvise_disallowed # RUN pfnmap.munmap_split ... # OK pfnmap.munmap_split ok 2 pfnmap.munmap_split # RUN pfnmap.mremap_fixed ... # OK pfnmap.mremap_fixed ok 3 pfnmap.mremap_fixed # RUN pfnmap.mremap_shrink ... # OK pfnmap.mremap_shrink ok 4 pfnmap.mremap_shrink # RUN pfnmap.mremap_expand ... # OK pfnmap.mremap_expand ok 5 pfnmap.mremap_expand # RUN pfnmap.fork ... # OK pfnmap.fork ok 6 pfnmap.fork # PASSED: 6 / 6 tests passed. # Totals: pass:6 fail:0 xfail:0 xpass:0 skip:0 error:0 However, we are able to trigger: [ 27.888251] x86/PAT: pfnmap:1790 freeing invalid memtype [mem 0x00000000-0x00000fff] There are probably more things worth testing in the future, such as MAP_PRIVATE handling. But this set of tests is sufficient to cover most of the things we will rework regarding PAT handling. Link: https://lkml.kernel.org/r/20250509153033.952746-1-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Xu <peterx@redhat.com> Cc: Dev Jain <dev.jain@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
252 lines
7.5 KiB
Makefile
252 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 += pfnmap
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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-regions
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TEST_GEN_FILES += merge
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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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