KVM: selftests: Add a helper to get system default hugetlb page size

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If HUGETLB is configured in the host kernel, then we can know the system
default hugetlb page size through *cat /proc/meminfo*. Otherwise, we will
not see the information of hugetlb pages in file /proc/meminfo if it's not
configured. So add a helper to determine whether HUGETLB is configured and
then get the default page size by reading /proc/meminfo.

This helper can be useful when a program wants to use the default hugetlb
pages of the system and doesn't know the default page size.

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-Id: <20210330080856.14940-8-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Yanan Wang 2021-03-30 16:08:53 +08:00 • committed by Paolo Bonzini

parent 3b70c4d128

commit 5579fa682a

2 changed files with 26 additions and 0 deletions

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tools/testing/selftests/kvm/include/test_util.h

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tools/testing/selftests/kvm/lib/test_util.c

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