From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934126AbaEMPAU (ORCPT ); Tue, 13 May 2014 11:00:20 -0400 Received: from e06smtp15.uk.ibm.com ([195.75.94.111]:59760 "EHLO e06smtp15.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964999AbaEMO6w (ORCPT ); Tue, 13 May 2014 10:58:52 -0400 From: Michael Mueller To: qemu-devel@nongnu.org, kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Cornelia Huck , Christian Borntraeger , Alexander Graf , Gleb Natapov , Paolo Bonzini , Richard Henderson , Andreas Faerber , "Jason J. Herne" , mimu@linux.vnet.ibm.com Subject: [PATCH v1 RFC 1/6] s390/sclp: add sclp_get_ibc function Date: Tue, 13 May 2014 16:58:29 +0200 Message-Id: <1399993114-15333-2-git-send-email-mimu@linux.vnet.ibm.com> X-Mailer: git-send-email 1.8.5.5 In-Reply-To: <1399993114-15333-1-git-send-email-mimu@linux.vnet.ibm.com> References: <1399993114-15333-1-git-send-email-mimu@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14051314-0342-0000-0000-000008BF6BA4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The patch adds functionality to retrieve the IBC configuration by means of function sclp_get_ibc(). Signed-off-by: Michael Mueller Acked-by: Cornelia Huck Acked-by: Heiko Carstens Acked-by: Christian Borntraeger --- arch/s390/include/asm/sclp.h | 1 + drivers/s390/char/sclp_early.c | 12 +++++++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h index 943d434..1aba89b 100644 --- a/arch/s390/include/asm/sclp.h +++ b/arch/s390/include/asm/sclp.h @@ -66,5 +66,6 @@ int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode); unsigned long sclp_get_hsa_size(void); void sclp_early_detect(void); int sclp_has_siif(void); +unsigned int sclp_get_ibc(void); #endif /* _ASM_S390_SCLP_H */ diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c index b57fe0e..1918d9d 100644 --- a/drivers/s390/char/sclp_early.c +++ b/drivers/s390/char/sclp_early.c @@ -27,7 +27,9 @@ struct read_info_sccb { u8 loadparm[8]; /* 24-31 */ u8 _reserved1[48 - 32]; /* 32-47 */ u64 facilities; /* 48-55 */ - u8 _reserved2[84 - 56]; /* 56-83 */ + u8 _reserved2a[76 - 56]; /* 56-75 */ + u32 ibc; /* 76-79 */ + u8 _reserved2b[84 - 80]; /* 80-83 */ u8 fac84; /* 84 */ u8 fac85; /* 85 */ u8 _reserved3[91 - 86]; /* 86-90 */ @@ -47,6 +49,7 @@ static unsigned long sclp_hsa_size; static unsigned int sclp_max_cpu; static struct sclp_ipl_info sclp_ipl_info; static unsigned char sclp_siif; +static u32 sclp_ibc; u64 sclp_facilities; u8 sclp_fac84; @@ -111,6 +114,7 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb) sclp_rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; sclp_rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; sclp_rzm <<= 20; + sclp_ibc = sccb->ibc; if (!sccb->hcpua) { if (MACHINE_IS_VM) @@ -168,6 +172,12 @@ int sclp_has_siif(void) } EXPORT_SYMBOL(sclp_has_siif); +unsigned int sclp_get_ibc(void) +{ + return sclp_ibc; +} +EXPORT_SYMBOL(sclp_get_ibc); + /* * This function will be called after sclp_facilities_detect(), which gets * called from early.c code. The sclp_facilities_detect() function retrieves -- 1.8.3.1