From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44874) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e87Hk-0001qB-RZ for qemu-devel@nongnu.org; Fri, 27 Oct 2017 12:15:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e87Hg-00084V-S5 for qemu-devel@nongnu.org; Fri, 27 Oct 2017 12:15:04 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36198 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1e87Hg-00083e-Lv for qemu-devel@nongnu.org; Fri, 27 Oct 2017 12:15:00 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v9RG2Al0048672 for ; Fri, 27 Oct 2017 12:14:57 -0400 Received: from e11.ny.us.ibm.com (e11.ny.us.ibm.com [129.33.205.201]) by mx0b-001b2d01.pphosted.com with ESMTP id 2dv3t5exyp-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 27 Oct 2017 12:14:57 -0400 Received: from localhost by e11.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 27 Oct 2017 12:14:56 -0400 From: "Collin L. Walling" Date: Fri, 27 Oct 2017 12:14:53 -0400 Message-Id: <1509120893-28054-1-git-send-email-walling@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v4] s390-ccw: print carriage return with new lines List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: cohuck@redhat.com, borntraeger@de.ibm.com Cc: thuth@redhat.com, bwalk@linux.vnet.ibm.com, david@redhat.com, pmorel@linux.vnet.ibm.com, qemu-devel@nongnu.org, agraf@suse.de, pasic@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com, rth@twiddle.net The sclp console in the s390 bios writes raw data, leading console emulators (such as virsh console) to treat a new line ('\n') as just a new line instead of as a Unix line feed. Because of this, output appears in a "stair case" pattern. Let's print \r\n on every occurrence of a new line in the string passed to write to amend this issue. This is in sync with the guest Linux code in drivers/s390/char/sclp_vt220.c which also does a line feed conversion in the console part of the driver. This fixes the s390-ccw and s390-netboot output like $ virsh start test --console Domain test started Connected to domain test Escape character is ^] Network boot starting... Using MAC address: 02:01:02:03:04:05 Requesting information via DHCP: 010 Signed-off-by: Collin L. Walling --- pc-bios/s390-ccw/sclp.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/pc-bios/s390-ccw/sclp.c b/pc-bios/s390-ccw/sclp.c index 486fce1..e6a0898 100644 --- a/pc-bios/s390-ccw/sclp.c +++ b/pc-bios/s390-ccw/sclp.c @@ -68,17 +68,35 @@ void sclp_setup(void) long write(int fd, const void *str, size_t len) { WriteEventData *sccb = (void *)_sccb; + const char *p = str; + size_t data_len = 0; + size_t i; if (fd != 1 && fd != 2) { return -EIO; } - sccb->h.length = sizeof(WriteEventData) + len; + for (i = 0; i < len; i++) { + if ((data_len + 1) >= SCCB_DATA_LEN) { + /* We would overflow the sccb buffer, abort early */ + len = i; + break; + } + + if (*p == '\n') { + /* Terminal emulators might need \r\n, so generate it */ + sccb->data[data_len++] = '\r'; + } + + sccb->data[data_len++] = *p; + p++; + } + + sccb->h.length = sizeof(WriteEventData) + data_len; sccb->h.function_code = SCLP_FC_NORMAL_WRITE; - sccb->ebh.length = sizeof(EventBufferHeader) + len; + sccb->ebh.length = sizeof(EventBufferHeader) + data_len; sccb->ebh.type = SCLP_EVENT_ASCII_CONSOLE_DATA; sccb->ebh.flags = 0; - memcpy(sccb->data, str, len); sclp_service_call(SCLP_CMD_WRITE_EVENT_DATA, sccb); -- 2.7.4