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From: Janosch Frank <frankja@linux.ibm.com>
To: kvm@vger.kernel.org
Cc: frankja@linux.ibm.com, david@redhat.com, cohuck@redhat.com,
	linux-s390@vger.kernel.org, imbrenda@linux.ibm.com,
	thuth@redhat.com
Subject: [kvm-unit-tests PATCH v2 3/6] s390x: uv: Add UV lib
Date: Mon, 10 May 2021 13:51:45 +0000	[thread overview]
Message-ID: <20210510135148.1904-4-frankja@linux.ibm.com> (raw)
In-Reply-To: <20210510135148.1904-1-frankja@linux.ibm.com>

Let's add a UV library to make checking the UV feature bit easier.
In the future this library file can take care of handling UV
initialization and UV guest creation.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
 lib/s390x/asm/uv.h |  4 ++--
 lib/s390x/io.c     |  2 ++
 lib/s390x/uv.c     | 45 +++++++++++++++++++++++++++++++++++++++++++++
 lib/s390x/uv.h     | 10 ++++++++++
 s390x/Makefile     |  1 +
 5 files changed, 60 insertions(+), 2 deletions(-)
 create mode 100644 lib/s390x/uv.c
 create mode 100644 lib/s390x/uv.h

diff --git a/lib/s390x/asm/uv.h b/lib/s390x/asm/uv.h
index 11f70a9f..b22cbaa8 100644
--- a/lib/s390x/asm/uv.h
+++ b/lib/s390x/asm/uv.h
@@ -9,8 +9,8 @@
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2.
  */
-#ifndef UV_H
-#define UV_H
+#ifndef ASM_S390X_UV_H
+#define ASM_S390X_UV_H
 
 #define UVC_RC_EXECUTED		0x0001
 #define UVC_RC_INV_CMD		0x0002
diff --git a/lib/s390x/io.c b/lib/s390x/io.c
index ef9f59e3..a4f1b113 100644
--- a/lib/s390x/io.c
+++ b/lib/s390x/io.c
@@ -14,6 +14,7 @@
 #include <asm/facility.h>
 #include <asm/sigp.h>
 #include "sclp.h"
+#include "uv.h"
 #include "smp.h"
 
 extern char ipl_args[];
@@ -38,6 +39,7 @@ void setup(void)
 	sclp_facilities_setup();
 	sclp_console_setup();
 	sclp_memory_setup();
+	uv_setup();
 	smp_setup();
 }
 
diff --git a/lib/s390x/uv.c b/lib/s390x/uv.c
new file mode 100644
index 00000000..0d8c141c
--- /dev/null
+++ b/lib/s390x/uv.c
@@ -0,0 +1,45 @@
+#include <libcflat.h>
+#include <bitops.h>
+#include <alloc.h>
+#include <alloc_page.h>
+#include <asm/page.h>
+#include <asm/arch_def.h>
+
+#include <asm/facility.h>
+#include <asm/uv.h>
+#include <uv.h>
+
+static struct uv_cb_qui uvcb_qui = {
+	.header.cmd = UVC_CMD_QUI,
+	.header.len = sizeof(uvcb_qui),
+};
+
+bool uv_os_is_guest(void)
+{
+	return test_facility(158) &&
+		uv_query_test_call(BIT_UVC_CMD_SET_SHARED_ACCESS) &&
+		uv_query_test_call(BIT_UVC_CMD_REMOVE_SHARED_ACCESS);
+}
+
+bool uv_os_is_host(void)
+{
+	return test_facility(158) && uv_query_test_call(BIT_UVC_CMD_INIT_UV);
+}
+
+bool uv_query_test_call(unsigned int nr)
+{
+	/* Query needs to be called first */
+	assert(uvcb_qui.header.rc);
+	assert(nr < BITS_PER_LONG * ARRAY_SIZE(uvcb_qui.inst_calls_list));
+
+	return test_bit_inv(nr, uvcb_qui.inst_calls_list);
+}
+
+int uv_setup(void)
+{
+	if (!test_facility(158))
+		return 0;
+
+	assert(!uv_call(0, (u64)&uvcb_qui));
+	return 1;
+}
diff --git a/lib/s390x/uv.h b/lib/s390x/uv.h
new file mode 100644
index 00000000..42608a96
--- /dev/null
+++ b/lib/s390x/uv.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef UV_H
+#define UV_H
+
+bool uv_os_is_guest(void);
+bool uv_os_is_host(void);
+bool uv_query_test_call(unsigned int nr);
+int uv_setup(void);
+
+#endif /* UV_H */
diff --git a/s390x/Makefile b/s390x/Makefile
index b92de9c5..bbf177fa 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -67,6 +67,7 @@ cflatobjs += lib/s390x/vm.o
 cflatobjs += lib/s390x/css_dump.o
 cflatobjs += lib/s390x/css_lib.o
 cflatobjs += lib/s390x/malloc_io.o
+cflatobjs += lib/s390x/uv.o
 
 OBJDIRS += lib/s390x
 
-- 
2.30.2


  parent reply	other threads:[~2021-05-10 13:56 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-10 13:51 [kvm-unit-tests PATCH v2 0/6] s390x: uv: Extend guest test and add host test Janosch Frank
2021-05-10 13:51 ` [kvm-unit-tests PATCH v2 1/6] s390x: uv-guest: Add invalid share location test Janosch Frank
2021-05-10 13:51 ` [kvm-unit-tests PATCH v2 2/6] s390x: Add more Ultravisor command structure definitions Janosch Frank
2021-05-11 16:02   ` Cornelia Huck
2021-05-10 13:51 ` Janosch Frank [this message]
2021-05-11 16:13   ` [kvm-unit-tests PATCH v2 3/6] s390x: uv: Add UV lib Cornelia Huck
2021-05-18 13:10     ` Janosch Frank
2021-05-10 13:51 ` [kvm-unit-tests PATCH v2 4/6] s390x: Test for share/unshare call support before using them Janosch Frank
2021-05-11 16:15   ` Cornelia Huck
2021-05-10 13:51 ` [kvm-unit-tests PATCH v2 5/6] s390x: uv-guest: Test invalid commands Janosch Frank
2021-05-11 16:22   ` Cornelia Huck
2021-05-11 17:12   ` Claudio Imbrenda
2021-05-10 13:51 ` [kvm-unit-tests PATCH v2 6/6] s390x: Add UV host test Janosch Frank
2021-05-11 16:25   ` Cornelia Huck

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