From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Matthew Rosato Subject: [PATCH 3/4] s390/pci: Get hardware-reported max store block length Date: Tue, 19 Jan 2021 15:02:29 -0500 Message-Id: <1611086550-32765-4-git-send-email-mjrosato@linux.ibm.com> In-Reply-To: <1611086550-32765-1-git-send-email-mjrosato@linux.ibm.com> References: <1611086550-32765-1-git-send-email-mjrosato@linux.ibm.com> List-ID: To: alex.williamson@redhat.com, cohuck@redhat.com, schnelle@linux.ibm.com Cc: pmorel@linux.ibm.com, borntraeger@de.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, gerald.schaefer@linux.ibm.com, linux-s390@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org We'll need to know this information for vfio passthrough. Signed-off-by: Matthew Rosato Reviewed-by: Pierre Morel --- arch/s390/include/asm/pci.h | 1 + arch/s390/include/asm/pci_clp.h | 3 ++- arch/s390/pci/pci_clp.c | 1 + 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index f16ffba..04f1f48 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -181,6 +181,7 @@ struct zpci_dev { atomic64_t mapped_pages; atomic64_t unmapped_pages; + u16 maxstbl; u8 version; enum pci_bus_speed max_bus_speed; diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h index 9fb7cbf..ddd1604 100644 --- a/arch/s390/include/asm/pci_clp.h +++ b/arch/s390/include/asm/pci_clp.h @@ -155,7 +155,8 @@ struct clp_rsp_query_pci_grp { u8 : 1; u8 frame : 1; u8 refresh : 1; /* TLB refresh mode */ - u16 reserved2; + u16 : 3; + u16 maxstbl : 13; u16 mui; u16 : 16; u16 maxfaal; diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c index 630f8fc..99b64fe 100644 --- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -104,6 +104,7 @@ static void clp_store_query_pci_fngrp(struct zpci_dev *zdev, zdev->fmb_update = response->mui; zdev->version = response->version; zdev->relaxed_align = response->relaxed_align; + zdev->maxstbl = response->maxstbl; switch (response->version) { case 1: -- 1.8.3.1