f4870ef3e1
Manually padding and aligning the mmap region is only needed when using THP. When using HugeTLB, mmap will always return an address aligned to the HugeTLB page size. Add a comment to clarify this and assert the mmap behavior for HugeTLB. [Removed requirement that HugeTLB mmaps must be padded per Yanan's feedback and added assertion that mmap returns aligned addresses when using HugeTLB.] Cc: Ben Gardon <bgardon@google.com> Cc: Yanan Wang <wangyanan55@huawei.com> Cc: Andrew Jones <drjones@redhat.com> Cc: Peter Xu <peterx@redhat.com> Cc: Aaron Lewis <aaronlewis@google.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: David Matlack <dmatlack@google.com> Message-Id: <20211111000310.1435032-4-dmatlack@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
146 lines
4 KiB
C
146 lines
4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* tools/testing/selftests/kvm/include/test_util.h
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*
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* Copyright (C) 2018, Google LLC.
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*/
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#ifndef SELFTEST_KVM_TEST_UTIL_H
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#define SELFTEST_KVM_TEST_UTIL_H
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include "kselftest.h"
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static inline int _no_printf(const char *format, ...) { return 0; }
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#ifdef DEBUG
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#define pr_debug(...) printf(__VA_ARGS__)
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#else
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#define pr_debug(...) _no_printf(__VA_ARGS__)
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#endif
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#ifndef QUIET
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#define pr_info(...) printf(__VA_ARGS__)
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#else
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#define pr_info(...) _no_printf(__VA_ARGS__)
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#endif
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void print_skip(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
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ssize_t test_write(int fd, const void *buf, size_t count);
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ssize_t test_read(int fd, void *buf, size_t count);
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int test_seq_read(const char *path, char **bufp, size_t *sizep);
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void test_assert(bool exp, const char *exp_str,
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const char *file, unsigned int line, const char *fmt, ...)
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__attribute__((format(printf, 5, 6)));
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#define TEST_ASSERT(e, fmt, ...) \
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test_assert((e), #e, __FILE__, __LINE__, fmt, ##__VA_ARGS__)
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#define ASSERT_EQ(a, b) do { \
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typeof(a) __a = (a); \
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typeof(b) __b = (b); \
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TEST_ASSERT(__a == __b, \
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"ASSERT_EQ(%s, %s) failed.\n" \
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"\t%s is %#lx\n" \
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"\t%s is %#lx", \
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#a, #b, #a, (unsigned long) __a, #b, (unsigned long) __b); \
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} while (0)
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#define TEST_FAIL(fmt, ...) \
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TEST_ASSERT(false, fmt, ##__VA_ARGS__)
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size_t parse_size(const char *size);
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int64_t timespec_to_ns(struct timespec ts);
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struct timespec timespec_add_ns(struct timespec ts, int64_t ns);
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struct timespec timespec_add(struct timespec ts1, struct timespec ts2);
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struct timespec timespec_sub(struct timespec ts1, struct timespec ts2);
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struct timespec timespec_elapsed(struct timespec start);
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struct timespec timespec_div(struct timespec ts, int divisor);
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enum vm_mem_backing_src_type {
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VM_MEM_SRC_ANONYMOUS,
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VM_MEM_SRC_ANONYMOUS_THP,
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VM_MEM_SRC_ANONYMOUS_HUGETLB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_16KB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_64KB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_512KB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_1MB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_2MB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_8MB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_16MB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_32MB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_256MB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_512MB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_1GB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_2GB,
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VM_MEM_SRC_ANONYMOUS_HUGETLB_16GB,
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VM_MEM_SRC_SHMEM,
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VM_MEM_SRC_SHARED_HUGETLB,
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NUM_SRC_TYPES,
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};
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#define DEFAULT_VM_MEM_SRC VM_MEM_SRC_ANONYMOUS
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struct vm_mem_backing_src_alias {
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const char *name;
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uint32_t flag;
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};
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#define MIN_RUN_DELAY_NS 200000UL
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bool thp_configured(void);
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size_t get_trans_hugepagesz(void);
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size_t get_def_hugetlb_pagesz(void);
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const struct vm_mem_backing_src_alias *vm_mem_backing_src_alias(uint32_t i);
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size_t get_backing_src_pagesz(uint32_t i);
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bool is_backing_src_hugetlb(uint32_t i);
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void backing_src_help(const char *flag);
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enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name);
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long get_run_delay(void);
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/*
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* Whether or not the given source type is shared memory (as opposed to
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* anonymous).
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*/
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static inline bool backing_src_is_shared(enum vm_mem_backing_src_type t)
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{
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return vm_mem_backing_src_alias(t)->flag & MAP_SHARED;
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}
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/* Aligns x up to the next multiple of size. Size must be a power of 2. */
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static inline uint64_t align_up(uint64_t x, uint64_t size)
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{
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uint64_t mask = size - 1;
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TEST_ASSERT(size != 0 && !(size & (size - 1)),
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"size not a power of 2: %lu", size);
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return ((x + mask) & ~mask);
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}
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static inline uint64_t align_down(uint64_t x, uint64_t size)
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{
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uint64_t x_aligned_up = align_up(x, size);
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if (x == x_aligned_up)
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return x;
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else
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return x_aligned_up - size;
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}
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static inline void *align_ptr_up(void *x, size_t size)
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{
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return (void *)align_up((unsigned long)x, size);
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}
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#endif /* SELFTEST_KVM_TEST_UTIL_H */
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