On 1/18/22 09:35, Janosch Frank wrote:
On 1/17/22 15:57, Pierre Morel wrote:
On 1/11/22 13:27, Janosch Frank wrote:
On 1/10/22 14:37, Pierre Morel wrote:
We need in several tests to check if the VM we are running in
is KVM.
Let's add the test.
To check the VM type we use the STSI 3.2.2 instruction, let's
define it's response structure in a central header.
Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
---
lib/s390x/stsi.h | 32 ++++++++++++++++++++++++++++++++
lib/s390x/vm.c | 39 +++++++++++++++++++++++++++++++++++++++
lib/s390x/vm.h | 1 +
s390x/stsi.c | 23 ++---------------------
4 files changed, 74 insertions(+), 21 deletions(-)
create mode 100644 lib/s390x/stsi.h
diff --git a/lib/s390x/stsi.h b/lib/s390x/stsi.h
new file mode 100644
index 00000000..02cc94a6
--- /dev/null
+++ b/lib/s390x/stsi.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Structures used to Store System Information
+ *
+ * Copyright (c) 2021 IBM Inc
+ */
+
+#ifndef _S390X_STSI_H_
+#define _S390X_STSI_H_
+
+struct sysinfo_3_2_2 {
+ uint8_t reserved[31];
+ uint8_t count;
+ struct {
+ uint8_t reserved2[4];
+ uint16_t total_cpus;
+ uint16_t conf_cpus;
+ uint16_t standby_cpus;
+ uint16_t reserved_cpus;
+ uint8_t name[8];
+ uint32_t caf;
+ uint8_t cpi[16];
+ uint8_t reserved5[3];
+ uint8_t ext_name_encoding;
+ uint32_t reserved3;
+ uint8_t uuid[16];
+ } vm[8];
+ uint8_t reserved4[1504];
+ uint8_t ext_names[8][256];
+};
+
+#endif /* _S390X_STSI_H_ */
diff --git a/lib/s390x/vm.c b/lib/s390x/vm.c
index a5b92863..3e11401e 100644
--- a/lib/s390x/vm.c
+++ b/lib/s390x/vm.c
@@ -12,6 +12,7 @@
#include <alloc_page.h>
#include <asm/arch_def.h>
#include "vm.h"
+#include "stsi.h"
/**
* Detect whether we are running with TCG (instead of KVM)
We could add a fc < 3 check to the vm_is_tcg() function and add a
OK
vm_is_lpar() which does a simple fc ==1 check.
hum, the doc says 1 is basic, 2 is lpar, 3 is vm, shouldn't we
do a check on fc == 2 or have a vm_is_vm checking fc < 3 ?
Right
I'll do some tests on the lpar stsi output and have a look what we get
back.
Do you have an experimental return on this?
ENOPARSE
:) you just answered.
I wanted to ask if you did tests which gave you "1" as result.
--
Pierre Morel
IBM Lab Boeblingen
