[kvm-unit-tests GIT PULL 08/11] s390x: sie: Add first SIE test

Janosch Frank
2021-01-20T11:44:22Z

Let's check if we get the correct interception data on a few
diags. This commit is more of an addition of boilerplate code than a
real test.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
---
s390x/Makefile | 1 +
s390x/sie.c | 113 ++++++++++++++++++++++++++++++++++++++++++++
s390x/unittests.cfg | 3 ++
3 files changed, 117 insertions(+)
create mode 100644 s390x/sie.c

diff --git a/s390x/Makefile b/s390x/Makefile
index 5f235f1..08d85c9 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -19,6 +19,7 @@ tests += $(TEST_DIR)/smp.elf
tests += $(TEST_DIR)/sclp.elf
tests += $(TEST_DIR)/css.elf
tests += $(TEST_DIR)/uv-guest.elf
+tests += $(TEST_DIR)/sie.elf

tests_binary = $(patsubst %.elf,%.bin,$(tests))
ifneq ($(HOST_KEY_DOCUMENT),)
diff --git a/s390x/sie.c b/s390x/sie.c
new file mode 100644
index 0000000..cfc746f
--- /dev/null
+++ b/s390x/sie.c
@@ -0,0 +1,113 @@
+#include <libcflat.h>
+#include <asm/asm-offsets.h>
+#include <asm/arch_def.h>
+#include <asm/interrupt.h>
+#include <asm/page.h>
+#include <alloc_page.h>
+#include <vmalloc.h>
+#include <asm/facility.h>
+#include <mmu.h>
+#include <sclp.h>
+#include <sie.h>
+
+static u8 *guest;
+static u8 *guest_instr;
+static struct vm vm;
+
+static void handle_validity(struct vm *vm)
+{
+ report(0, "VALIDITY: %x", vm->sblk->ipb >> 16);
+}
+
+static void sie(struct vm *vm)
+{
+ while (vm->sblk->icptcode == 0) {
+ sie64a(vm->sblk, &vm->save_area);
+ if (vm->sblk->icptcode == ICPT_VALIDITY)
+ handle_validity(vm);
+ }
+ vm->save_area.guest.grs[14] = vm->sblk->gg14;
+ vm->save_area.guest.grs[15] = vm->sblk->gg15;
+}
+
+static void sblk_cleanup(struct vm *vm)
+{
+ vm->sblk->icptcode = 0;
+}
+
+static void test_diag(u32 instr)
+{
+ vm.sblk->gpsw.addr = PAGE_SIZE * 2;
+ vm.sblk->gpsw.mask = 0x0000000180000000ULL;
+
+ memset(guest_instr, 0, PAGE_SIZE);
+ memcpy(guest_instr, &instr, 4);
+ sie(&vm);
+ report(vm.sblk->icptcode == ICPT_INST &&
+ vm.sblk->ipa == instr >> 16 && vm.sblk->ipb == instr << 16,
+ "Intercept data");
+ sblk_cleanup(&vm);
+}
+
+static struct {
+ const char *name;
+ u32 instr;
+} tests[] = {
+ { "10", 0x83020010 },
+ { "44", 0x83020044 },
+ { "9c", 0x8302009c },
+ { NULL, 0 }
+};
+
+static void test_diags(void)
+{
+ int i;
+
+ for (i = 0; tests[i].name; i++) {
+ report_prefix_push(tests[i].name);
+ test_diag(tests[i].instr);
+ report_prefix_pop();
+ }
+}
+
+static void setup_guest(void)
+{
+ setup_vm();
+
+ /* Allocate 1MB as guest memory */
+ guest = alloc_pages(8);
+ /* The first two pages are the lowcore */
+ guest_instr = guest + PAGE_SIZE * 2;
+
+ vm.sblk = alloc_page();
+
+ vm.sblk->cpuflags = CPUSTAT_ZARCH | CPUSTAT_RUNNING;
+ vm.sblk->prefix = 0;
+ /*
+ * Pageable guest with the same ASCE as the test programm, but
+ * the guest memory 0x0 is offset to start at the allocated
+ * guest pages and end after 1MB.
+ *
+ * It's not pretty but faster and easier than managing guest ASCEs.
+ */
+ vm.sblk->mso = (u64)guest;
+ vm.sblk->msl = (u64)guest;
+ vm.sblk->ihcpu = 0xffff;
+
+ vm.sblk->crycbd = (uint64_t)alloc_page();
+}
+
+int main(void)
+{
+ report_prefix_push("sie");
+ if (!sclp_facilities.has_sief2) {
+ report_skip("SIEF2 facility unavailable");
+ goto done;
+ }
+
+ setup_guest();
+ test_diags();
+done:
+ report_prefix_pop();
+ return report_summary();
+}
diff --git a/s390x/unittests.cfg b/s390x/unittests.cfg
index 3feb8bc..2298be6 100644
--- a/s390x/unittests.cfg
+++ b/s390x/unittests.cfg
@@ -96,3 +96,6 @@ smp = 2

[uv-guest]
file = uv-guest.elf
+
+[sie]
+file = sie.elf
--
2.25.1