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Wed, 19 May 2021 07:40:38 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 80FE2A4060; Wed, 19 May 2021 07:40:37 +0000 (GMT) Received: from linux01.pok.stglabs.ibm.com (unknown [9.114.17.81]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 19 May 2021 07:40:37 +0000 (GMT) From: Janosch Frank 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 v3 3/6] s390x: uv: Add UV lib Date: Wed, 19 May 2021 07:40:19 +0000 Message-Id: <20210519074022.7368-4-frankja@linux.ibm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210519074022.7368-1-frankja@linux.ibm.com> References: <20210519074022.7368-1-frankja@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: VF4UiOX5Iig2NPt7YQ6zePuGkSAaOO0v X-Proofpoint-ORIG-GUID: uXxy-NbV36c6MG9UsEtksSJ8q98t_nBW X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-05-19_02:2021-05-18,2021-05-19 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 adultscore=0 mlxlogscore=999 spamscore=0 clxscore=1015 mlxscore=0 bulkscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2105190059 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org Lets 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 Reviewed-by: Claudio Imbrenda Reviewed-by: Cornelia Huck --- 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 #include #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 +#include +#include +#include +#include +#include + +#include +#include +#include + +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