diff options
| author | Christopher Ferris <cferris@google.com> | 2023-11-01 19:22:42 -0700 |
|---|---|---|
| committer | Christopher Ferris <cferris@google.com> | 2023-11-03 13:20:10 -0700 |
| commit | adab44284b49c47f55067619a7c0d1cd5890d7e1 (patch) | |
| tree | 23567cf402b0b042193cbd1d43fdc59f638ba029 | |
| parent | 6f52d50ac97322b7e75a9dfc1fcae9f48ecab581 (diff) | |
| download | linux-kselftest-adab44284b49c47f55067619a7c0d1cd5890d7e1.tar.gz | |
ANDROID: Get kernel version to handle UFFD_POISON.
The 6.6 kernels are the first version to handle the UFFD_POISON ioctl,
so skip checking for this ioctl based on the kernel being tested.
Bug: 308714445
Test: Ran atest -a vts_linux_kselftest_x86_32
Test: Ran atest -a vts_linux_kselftest_x86_64
Change-Id: Ib4cbac94776efb2d09f19333075da839dc274635
| -rw-r--r-- | tools/testing/selftests/vm/userfaultfd.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index a3c0bf6af646..c22127e72a3c 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -59,6 +59,8 @@ #include <inttypes.h> #include <stdint.h> #include <sys/random.h> +#include <linux/version.h> +#include <sys/utsname.h> #include "../kselftest.h" #include "vm_util.h" @@ -407,6 +409,20 @@ static inline uint64_t uffd_minor_feature(void) return 0; } +/* b/308714445 + * _UFFDIO_POISON unsupported in kernel <6.6 + */ +static uint32_t get_kernel_version(void) +{ + uint32_t major, minor, patch; + struct utsname info; + + uname(&info); + if (sscanf(info.release, "%u.%u.%u", &major, &minor, &patch) != 3) + return 0; + return KERNEL_VERSION(major, minor, patch); +} + static uint64_t get_expected_ioctls(uint64_t mode) { uint64_t ioctls = UFFD_API_RANGE_IOCTLS; @@ -420,6 +436,15 @@ static uint64_t get_expected_ioctls(uint64_t mode) if (!((mode & UFFDIO_REGISTER_MODE_MINOR) && test_uffdio_minor)) ioctls &= ~(1 << _UFFDIO_CONTINUE); + static uint32_t kernel_version = 0; + if (kernel_version == 0) { + kernel_version = get_kernel_version(); + } + if (kernel_version < KERNEL_VERSION(6, 6, 0)) { + // UFFDIO_POISON not supported until kernel 6.6. + ioctls &= ~(1 << _UFFDIO_POISON); + } + return ioctls; } @@ -429,14 +454,6 @@ static void assert_expected_ioctls_present(uint64_t mode, uint64_t ioctls) uint64_t actual = ioctls & expected; if (actual != expected) { - /* b/308714445 - * _UFFDIO_POISON unsupported in kernel <6.6 - */ -#ifdef __ANDROID__ - if ((expected & ~(1 << _UFFDIO_POISON)) == actual) { - return; - } -#endif err("missing ioctl(s): expected %"PRIx64" actual: %"PRIx64, expected, actual); } |