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Mon, 14 Mar 2022 19:46:56 +0000 (GMT) From: Matthew Rosato To: linux-s390@vger.kernel.org Cc: alex.williamson@redhat.com, cohuck@redhat.com, schnelle@linux.ibm.com, farman@linux.ibm.com, pmorel@linux.ibm.com, borntraeger@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, gerald.schaefer@linux.ibm.com, agordeev@linux.ibm.com, svens@linux.ibm.com, frankja@linux.ibm.com, david@redhat.com, imbrenda@linux.ibm.com, vneethv@linux.ibm.com, oberpar@linux.ibm.com, freude@linux.ibm.com, thuth@redhat.com, pasic@linux.ibm.com, joro@8bytes.org, will@kernel.org, pbonzini@redhat.com, corbet@lwn.net, jgg@nvidia.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-doc@vger.kernel.org Subject: [PATCH v4 12/32] s390/pci: get SHM information from list pci Date: Mon, 14 Mar 2022 15:44:31 -0400 Message-Id: <20220314194451.58266-13-mjrosato@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220314194451.58266-1-mjrosato@linux.ibm.com> References: <20220314194451.58266-1-mjrosato@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Lf5BTqB_yYxhwqdCekbHBxZNYS04n_Y0 X-Proofpoint-ORIG-GUID: _lRlT4AF9cB3zz3nwpaB73t-ubUS3D9l X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.850,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-03-14_13,2022-03-14_02,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 malwarescore=0 phishscore=0 bulkscore=0 mlxscore=0 adultscore=0 clxscore=1015 suspectscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2203140116 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org KVM will need information on the special handle mask used to indicate emulated devices. In order to obtain this, a new type of list pci call must be made to gather the information. Extend clp_list_pci_req to also fetch the model-dependent-data field that holds this mask. Reviewed-by: Niklas Schnelle Acked-by: Pierre Morel Signed-off-by: Matthew Rosato --- arch/s390/include/asm/pci.h | 1 + arch/s390/include/asm/pci_clp.h | 2 +- arch/s390/pci/pci_clp.c | 25 ++++++++++++++++++++++--- 3 files changed, 24 insertions(+), 4 deletions(-) diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index 3c0b9986dcdc..e8a3fd5bc169 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -227,6 +227,7 @@ int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as); int clp_disable_fh(struct zpci_dev *zdev, u32 *fh); int clp_get_state(u32 fid, enum zpci_state *state); int clp_refresh_fh(u32 fid, u32 *fh); +int zpci_get_mdd(u32 *mdd); /* UID */ void update_uid_checking(bool new); diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h index d6189ed14f84..dc2041e97de4 100644 --- a/arch/s390/include/asm/pci_clp.h +++ b/arch/s390/include/asm/pci_clp.h @@ -76,7 +76,7 @@ struct clp_req_list_pci { struct clp_rsp_list_pci { struct clp_rsp_hdr hdr; u64 resume_token; - u32 reserved2; + u32 mdd; u16 max_fn; u8 : 7; u8 uid_checking : 1; diff --git a/arch/s390/pci/pci_clp.c b/arch/s390/pci/pci_clp.c index dc733b58e74f..7477956be632 100644 --- a/arch/s390/pci/pci_clp.c +++ b/arch/s390/pci/pci_clp.c @@ -328,7 +328,7 @@ int clp_disable_fh(struct zpci_dev *zdev, u32 *fh) } static int clp_list_pci_req(struct clp_req_rsp_list_pci *rrb, - u64 *resume_token, int *nentries) + u64 *resume_token, int *nentries, u32 *mdd) { int rc; @@ -354,6 +354,8 @@ static int clp_list_pci_req(struct clp_req_rsp_list_pci *rrb, *nentries = (rrb->response.hdr.len - LIST_PCI_HDR_LEN) / rrb->response.entry_size; *resume_token = rrb->response.resume_token; + if (mdd) + *mdd = rrb->response.mdd; return rc; } @@ -365,7 +367,7 @@ static int clp_list_pci(struct clp_req_rsp_list_pci *rrb, void *data, int nentries, i, rc; do { - rc = clp_list_pci_req(rrb, &resume_token, &nentries); + rc = clp_list_pci_req(rrb, &resume_token, &nentries, NULL); if (rc) return rc; for (i = 0; i < nentries; i++) @@ -383,7 +385,7 @@ static int clp_find_pci(struct clp_req_rsp_list_pci *rrb, u32 fid, int nentries, i, rc; do { - rc = clp_list_pci_req(rrb, &resume_token, &nentries); + rc = clp_list_pci_req(rrb, &resume_token, &nentries, NULL); if (rc) return rc; fh_list = rrb->response.fh_list; @@ -468,6 +470,23 @@ int clp_get_state(u32 fid, enum zpci_state *state) return rc; } +int zpci_get_mdd(u32 *mdd) +{ + struct clp_req_rsp_list_pci *rrb; + u64 resume_token = 0; + int nentries, rc; + + rrb = clp_alloc_block(GFP_KERNEL); + if (!rrb) + return -ENOMEM; + + rc = clp_list_pci_req(rrb, &resume_token, &nentries, mdd); + + clp_free_block(rrb); + return rc; +} +EXPORT_SYMBOL_GPL(zpci_get_mdd); + static int clp_base_slpc(struct clp_req *req, struct clp_req_rsp_slpc *lpcb) { unsigned long limit = PAGE_SIZE - sizeof(lpcb->request);