diff options
author | Peter Xu <peterx@redhat.com> | 2023-02-01 16:10:54 -0500 |
---|---|---|
committer | Juan Quintela <quintela@redhat.com> | 2023-02-06 19:22:56 +0100 |
commit | d5890ea0722831eea76a0efd23a496b3e8815fe8 (patch) | |
tree | c9d365c7db03036f2928100155bb8d77ccad6bee /migration | |
parent | d9df92925ef2b7ca8774ef44b0e1f859a91d4cd6 (diff) | |
download | qemu-d5890ea0722831eea76a0efd23a496b3e8815fe8.zip qemu-d5890ea0722831eea76a0efd23a496b3e8815fe8.tar.gz qemu-d5890ea0722831eea76a0efd23a496b3e8815fe8.tar.bz2 |
util/userfaultfd: Add uffd_open()
Add a helper to create the uffd handle.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'migration')
-rw-r--r-- | migration/postcopy-ram.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c index b9a37ef..0c55df0 100644 --- a/migration/postcopy-ram.c +++ b/migration/postcopy-ram.c @@ -37,6 +37,7 @@ #include "qemu-file.h" #include "yank_functions.h" #include "tls.h" +#include "qemu/userfaultfd.h" /* Arbitrary limit on size of each discard command, * keeps them around ~200 bytes @@ -226,11 +227,9 @@ static bool receive_ufd_features(uint64_t *features) int ufd; bool ret = true; - /* if we are here __NR_userfaultfd should exists */ - ufd = syscall(__NR_userfaultfd, O_CLOEXEC); + ufd = uffd_open(O_CLOEXEC); if (ufd == -1) { - error_report("%s: syscall __NR_userfaultfd failed: %s", __func__, - strerror(errno)); + error_report("%s: uffd_open() failed: %s", __func__, strerror(errno)); return false; } @@ -375,7 +374,7 @@ bool postcopy_ram_supported_by_host(MigrationIncomingState *mis) goto out; } - ufd = syscall(__NR_userfaultfd, O_CLOEXEC); + ufd = uffd_open(O_CLOEXEC); if (ufd == -1) { error_report("%s: userfaultfd not available: %s", __func__, strerror(errno)); @@ -1160,7 +1159,7 @@ static int postcopy_temp_pages_setup(MigrationIncomingState *mis) int postcopy_ram_incoming_setup(MigrationIncomingState *mis) { /* Open the fd for the kernel to give us userfaults */ - mis->userfault_fd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); + mis->userfault_fd = uffd_open(O_CLOEXEC | O_NONBLOCK); if (mis->userfault_fd == -1) { error_report("%s: Failed to open userfault fd: %s", __func__, strerror(errno)); |