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selftests/vm: move 128TB mmap boundary test to generic directory
Architectures like PPC64 support mmap hint address based large address space selection. This test can be run on those architectures too. Move the test from the x86 selftests to selftest/vm so that other architectures can use it too. We also add a few new test scenarios in this patch. We do test a few boundary conditions before we do a high address mmap. PPC64 uses the address limit to validate the address in the fault path. We had bugs in this area w.r.t SLB fault handling before we updated the addess limit. We also touch the allocated space to make sure we don't have any bugs in the fault handling path. [akpm@linux-foundation.org: restore tools/testing/selftests/vm/Makefile alpha ordering] Link: http://lkml.kernel.org/r/20171123165226.32582-1-aneesh.kumar@linux.vnet.ibm.com Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aneesh Kumar K.V
Linus Torvalds
parent
e496612c51
commit
235266b8e1
@ -8,17 +8,18 @@ endif
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CFLAGS = -Wall -I ../../../../usr/include $(EXTRA_CFLAGS)
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LDLIBS = -lrt
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TEST_GEN_FILES = compaction_test
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TEST_GEN_FILES += gup_benchmark
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TEST_GEN_FILES += hugepage-mmap
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TEST_GEN_FILES += hugepage-shm
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TEST_GEN_FILES += map_hugetlb
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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 += on-fault-limit
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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 += userfaultfd
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TEST_GEN_FILES += mlock-random-test
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TEST_GEN_FILES += va_128TBswitch
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TEST_GEN_FILES += virtual_address_range
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TEST_GEN_FILES += gup_benchmark
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TEST_PROGS := run_vmtests
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@ -177,4 +177,15 @@ else
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echo "[PASS]"
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fi
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echo "-----------------------------"
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echo "running virtual address 128TB switch test"
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echo "-----------------------------"
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./va_128TBswitch
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if [ $? -ne 0 ]; then
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echo "[FAIL]"
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exitcode=1
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else
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echo "[PASS]"
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fi
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exit $exitcode
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297
tools/testing/selftests/vm/va_128TBswitch.c
Normal file
297
tools/testing/selftests/vm/va_128TBswitch.c
Normal file
@ -0,0 +1,297 @@
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/*
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*
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* Authors: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
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* Authors: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*/
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#include <stdio.h>
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#include <sys/mman.h>
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#include <string.h>
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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#ifdef __powerpc64__
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#define PAGE_SIZE (64 << 10)
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/*
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* This will work with 16M and 2M hugepage size
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*/
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#define HUGETLB_SIZE (16 << 20)
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#else
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#define PAGE_SIZE (4 << 10)
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#define HUGETLB_SIZE (2 << 20)
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#endif
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/*
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* >= 128TB is the hint addr value we used to select
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* large address space.
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*/
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#define ADDR_SWITCH_HINT (1UL << 47)
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#define LOW_ADDR ((void *) (1UL << 30))
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#define HIGH_ADDR ((void *) (1UL << 48))
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struct testcase {
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void *addr;
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unsigned long size;
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unsigned long flags;
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const char *msg;
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unsigned int low_addr_required:1;
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unsigned int keep_mapped:1;
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};
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static struct testcase testcases[] = {
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{
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/*
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* If stack is moved, we could possibly allocate
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* this at the requested address.
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*/
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.addr = ((void *)(ADDR_SWITCH_HINT - PAGE_SIZE)),
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.size = PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, PAGE_SIZE)",
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.low_addr_required = 1,
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},
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{
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/*
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* We should never allocate at the requested address or above it
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* The len cross the 128TB boundary. Without MAP_FIXED
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* we will always search in the lower address space.
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*/
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.addr = ((void *)(ADDR_SWITCH_HINT - PAGE_SIZE)),
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, (2 * PAGE_SIZE))",
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.low_addr_required = 1,
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},
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{
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/*
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* Exact mapping at 128TB, the area is free we should get that
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* even without MAP_FIXED.
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*/
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.addr = ((void *)(ADDR_SWITCH_HINT)),
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.size = PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(ADDR_SWITCH_HINT, PAGE_SIZE)",
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.keep_mapped = 1,
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},
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{
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.addr = (void *)(ADDR_SWITCH_HINT),
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
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.msg = "mmap(ADDR_SWITCH_HINT, 2 * PAGE_SIZE, MAP_FIXED)",
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},
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{
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.addr = NULL,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(NULL)",
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.low_addr_required = 1,
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},
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{
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.addr = LOW_ADDR,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(LOW_ADDR)",
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.low_addr_required = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(HIGH_ADDR)",
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.keep_mapped = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(HIGH_ADDR) again",
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.keep_mapped = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
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.msg = "mmap(HIGH_ADDR, MAP_FIXED)",
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},
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{
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.addr = (void *) -1,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(-1)",
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.keep_mapped = 1,
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},
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{
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.addr = (void *) -1,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(-1) again",
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},
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{
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.addr = ((void *)(ADDR_SWITCH_HINT - PAGE_SIZE)),
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.size = PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, PAGE_SIZE)",
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.low_addr_required = 1,
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},
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{
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.addr = (void *)(ADDR_SWITCH_HINT - PAGE_SIZE),
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, 2 * PAGE_SIZE)",
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.low_addr_required = 1,
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.keep_mapped = 1,
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},
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{
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.addr = (void *)(ADDR_SWITCH_HINT - PAGE_SIZE / 2),
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE/2 , 2 * PAGE_SIZE)",
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.low_addr_required = 1,
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.keep_mapped = 1,
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},
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{
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.addr = ((void *)(ADDR_SWITCH_HINT)),
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.size = PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(ADDR_SWITCH_HINT, PAGE_SIZE)",
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},
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{
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.addr = (void *)(ADDR_SWITCH_HINT),
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
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.msg = "mmap(ADDR_SWITCH_HINT, 2 * PAGE_SIZE, MAP_FIXED)",
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},
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};
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static struct testcase hugetlb_testcases[] = {
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{
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.addr = NULL,
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.size = HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(NULL, MAP_HUGETLB)",
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.low_addr_required = 1,
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},
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{
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.addr = LOW_ADDR,
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.size = HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(LOW_ADDR, MAP_HUGETLB)",
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.low_addr_required = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(HIGH_ADDR, MAP_HUGETLB)",
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.keep_mapped = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(HIGH_ADDR, MAP_HUGETLB) again",
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.keep_mapped = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
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.msg = "mmap(HIGH_ADDR, MAP_FIXED | MAP_HUGETLB)",
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},
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{
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.addr = (void *) -1,
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.size = HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(-1, MAP_HUGETLB)",
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.keep_mapped = 1,
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},
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{
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.addr = (void *) -1,
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.size = HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(-1, MAP_HUGETLB) again",
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},
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{
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.addr = (void *)(ADDR_SWITCH_HINT - PAGE_SIZE),
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.size = 2 * HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(ADDR_SWITCH_HINT - PAGE_SIZE, 2*HUGETLB_SIZE, MAP_HUGETLB)",
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.low_addr_required = 1,
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.keep_mapped = 1,
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},
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{
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.addr = (void *)(ADDR_SWITCH_HINT),
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.size = 2 * HUGETLB_SIZE,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
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.msg = "mmap(ADDR_SWITCH_HINT , 2*HUGETLB_SIZE, MAP_FIXED | MAP_HUGETLB)",
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},
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};
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static int run_test(struct testcase *test, int count)
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{
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void *p;
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int i, ret = 0;
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for (i = 0; i < count; i++) {
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struct testcase *t = test + i;
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p = mmap(t->addr, t->size, PROT_READ | PROT_WRITE, t->flags, -1, 0);
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printf("%s: %p - ", t->msg, p);
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if (p == MAP_FAILED) {
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printf("FAILED\n");
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ret = 1;
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continue;
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}
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if (t->low_addr_required && p >= (void *)(ADDR_SWITCH_HINT)) {
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printf("FAILED\n");
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ret = 1;
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} else {
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/*
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* Do a dereference of the address returned so that we catch
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* bugs in page fault handling
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*/
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memset(p, 0, t->size);
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printf("OK\n");
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}
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if (!t->keep_mapped)
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munmap(p, t->size);
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}
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return ret;
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}
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static int supported_arch(void)
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{
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#if defined(__powerpc64__)
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return 1;
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#elif defined(__x86_64__)
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return 1;
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#else
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return 0;
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#endif
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}
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int main(int argc, char **argv)
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{
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int ret;
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if (!supported_arch())
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return 0;
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ret = run_test(testcases, ARRAY_SIZE(testcases));
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if (argc == 2 && !strcmp(argv[1], "--run-hugetlb"))
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ret = run_test(hugetlb_testcases, ARRAY_SIZE(hugetlb_testcases));
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return ret;
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}
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@ -1,177 +0,0 @@
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#include <stdio.h>
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#include <sys/mman.h>
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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#define PAGE_SIZE 4096
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#define LOW_ADDR ((void *) (1UL << 30))
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#define HIGH_ADDR ((void *) (1UL << 50))
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struct testcase {
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void *addr;
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unsigned long size;
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unsigned long flags;
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const char *msg;
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unsigned int low_addr_required:1;
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unsigned int keep_mapped:1;
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};
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static struct testcase testcases[] = {
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{
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.addr = NULL,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(NULL)",
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.low_addr_required = 1,
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},
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{
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.addr = LOW_ADDR,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(LOW_ADDR)",
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.low_addr_required = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(HIGH_ADDR)",
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.keep_mapped = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(HIGH_ADDR) again",
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.keep_mapped = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
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.msg = "mmap(HIGH_ADDR, MAP_FIXED)",
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},
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{
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.addr = (void*) -1,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(-1)",
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.keep_mapped = 1,
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},
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{
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.addr = (void*) -1,
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(-1) again",
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},
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{
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.addr = (void *)((1UL << 47) - PAGE_SIZE),
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap((1UL << 47), 2 * PAGE_SIZE)",
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.low_addr_required = 1,
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.keep_mapped = 1,
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},
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{
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.addr = (void *)((1UL << 47) - PAGE_SIZE / 2),
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap((1UL << 47), 2 * PAGE_SIZE / 2)",
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.low_addr_required = 1,
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.keep_mapped = 1,
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},
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{
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.addr = (void *)((1UL << 47) - PAGE_SIZE),
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.size = 2 * PAGE_SIZE,
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.flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
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.msg = "mmap((1UL << 47) - PAGE_SIZE, 2 * PAGE_SIZE, MAP_FIXED)",
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},
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{
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.addr = NULL,
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.size = 2UL << 20,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(NULL, MAP_HUGETLB)",
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.low_addr_required = 1,
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},
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{
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.addr = LOW_ADDR,
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.size = 2UL << 20,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(LOW_ADDR, MAP_HUGETLB)",
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.low_addr_required = 1,
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},
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{
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.addr = HIGH_ADDR,
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.size = 2UL << 20,
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.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
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.msg = "mmap(HIGH_ADDR, MAP_HUGETLB)",
|
||||
.keep_mapped = 1,
|
||||
},
|
||||
{
|
||||
.addr = HIGH_ADDR,
|
||||
.size = 2UL << 20,
|
||||
.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
|
||||
.msg = "mmap(HIGH_ADDR, MAP_HUGETLB) again",
|
||||
.keep_mapped = 1,
|
||||
},
|
||||
{
|
||||
.addr = HIGH_ADDR,
|
||||
.size = 2UL << 20,
|
||||
.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
|
||||
.msg = "mmap(HIGH_ADDR, MAP_FIXED | MAP_HUGETLB)",
|
||||
},
|
||||
{
|
||||
.addr = (void*) -1,
|
||||
.size = 2UL << 20,
|
||||
.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
|
||||
.msg = "mmap(-1, MAP_HUGETLB)",
|
||||
.keep_mapped = 1,
|
||||
},
|
||||
{
|
||||
.addr = (void*) -1,
|
||||
.size = 2UL << 20,
|
||||
.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
|
||||
.msg = "mmap(-1, MAP_HUGETLB) again",
|
||||
},
|
||||
{
|
||||
.addr = (void *)((1UL << 47) - PAGE_SIZE),
|
||||
.size = 4UL << 20,
|
||||
.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS,
|
||||
.msg = "mmap((1UL << 47), 4UL << 20, MAP_HUGETLB)",
|
||||
.low_addr_required = 1,
|
||||
.keep_mapped = 1,
|
||||
},
|
||||
{
|
||||
.addr = (void *)((1UL << 47) - (2UL << 20)),
|
||||
.size = 4UL << 20,
|
||||
.flags = MAP_HUGETLB | MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
|
||||
.msg = "mmap((1UL << 47) - (2UL << 20), 4UL << 20, MAP_FIXED | MAP_HUGETLB)",
|
||||
},
|
||||
};
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
int i;
|
||||
void *p;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(testcases); i++) {
|
||||
struct testcase *t = testcases + i;
|
||||
|
||||
p = mmap(t->addr, t->size, PROT_NONE, t->flags, -1, 0);
|
||||
|
||||
printf("%s: %p - ", t->msg, p);
|
||||
|
||||
if (p == MAP_FAILED) {
|
||||
printf("FAILED\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
if (t->low_addr_required && p >= (void *)(1UL << 47))
|
||||
printf("FAILED\n");
|
||||
else
|
||||
printf("OK\n");
|
||||
if (!t->keep_mapped)
|
||||
munmap(p, t->size);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user