Add support for s390 specific system call s390_guarded_storage
for 31 bit and 64 bit.
Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxxxxxxx>
---
include/syscalls-s390.h | 2 +-
include/syscalls-s390x.h | 2 +-
syscalls/s390x/s390_guarded_storage.c | 48 +++++++++++++++++++++++++++++++++++
syscalls/syscalls.h | 1 +
4 files changed, 51 insertions(+), 2 deletions(-)
create mode 100644 syscalls/s390x/s390_guarded_storage.c
diff --git a/include/syscalls-s390.h b/include/syscalls-s390.h
index a5a30c9e..ad2f88c6 100644
--- a/include/syscalls-s390.h
+++ b/include/syscalls-s390.h
@@ -389,7 +389,7 @@ struct syscalltable syscalls_s390[] = {
{ .entry = &syscall_copy_file_range },
{ .entry = &syscall_preadv2 },
{ .entry = &syscall_pwritev2 },
- { .entry = &syscall_ni_syscall }, /* TODO: s390_guarded_storage svc */
+ { .entry = &syscall_s390_guarded_storage },
{ .entry = &syscall_statx },
{ .entry = &syscall_ni_syscall }, /* TODO: s390_sthyi svc */
};
diff --git a/include/syscalls-s390x.h b/include/syscalls-s390x.h
index e74caa14..a83974e4 100644
--- a/include/syscalls-s390x.h
+++ b/include/syscalls-s390x.h
@@ -389,7 +389,7 @@ struct syscalltable syscalls_s390x[] = {
{ .entry = &syscall_copy_file_range },
{ .entry = &syscall_preadv2 },
{ .entry = &syscall_pwritev2 },
- { .entry = &syscall_ni_syscall }, /* TODO: s390_guarded_storage svc */
+ { .entry = &syscall_s390_guarded_storage },
{ .entry = &syscall_statx },
{ .entry = &syscall_ni_syscall }, /* TODO: s390_sthyi svc */
};
diff --git a/syscalls/s390x/s390_guarded_storage.c b/syscalls/s390x/s390_guarded_storage.c
new file mode 100644
index 00000000..290fe626
--- /dev/null
+++ b/syscalls/s390x/s390_guarded_storage.c
@@ -0,0 +1,48 @@
+/*
+ * int s390_guarded_storage(int command, struct gs_cb *gs_cb)
+ */
+
+#include <asm/guarded_storage.h>
+
+#include "random.h"
+#include "sanitise.h"
+
+static unsigned long syscall_s390_guarded_storage_arg1[] = {
+ GS_ENABLE,
+ GS_DISABLE,
+ GS_SET_BC_CB,
+ GS_CLEAR_BC_CB,
+ GS_BROADCAST,
+ GS_BROADCAST + 1,
+ -1
+};
+
+/* Allocate buffer and generate random data. */
+static void sanitise_s390_gs(struct syscallrecord *rec)
+{
+ size_t size = sizeof(struct gs_cb);
+ void *addr = malloc(size);
+
+ if (addr) {
+ generate_rand_bytes(addr, size);
+ rec->a2 = (unsigned long)addr;
+ }
+}
+
+/* Free buffer, freeptr takes care of NULL */
+static void post_s390_gs(struct syscallrecord *rec)
+{
+ freeptr(&rec->a2);
+}
+
+struct syscallentry syscall_s390_guarded_storage = {
+ .name = "s390_guarded_storage",
+ .sanitise = sanitise_s390_gs,
+ .post = post_s390_gs,
+ .num_args = 2,
+ .arg1name = "command",
+ .arg1type = ARG_LIST,
+ .arg1list = ARGLIST(syscall_s390_guarded_storage_arg1),
+ .arg2name = "gs_cb",
+ .arg2type = ARG_NON_NULL_ADDRESS
+};
diff --git a/syscalls/syscalls.h b/syscalls/syscalls.h
index 6564e22e..38271170 100644
--- a/syscalls/syscalls.h
+++ b/syscalls/syscalls.h
@@ -389,5 +389,6 @@ extern struct syscallentry syscall_statx;
extern struct syscallentry syscall_runtime_instr;
extern struct syscallentry syscall_s390_pci_mmio_write;
extern struct syscallentry syscall_s390_pci_mmio_read;
+extern struct syscallentry syscall_s390_guarded_storage;
unsigned int random_fcntl_setfl_flags(void);
--
2.14.3
--
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