From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gavin Shan Subject: [PATCH 14/22] powerpc/eeh: Emulate RTAS call ibm,get-config-addr-info2 Date: Mon, 5 May 2014 11:28:03 +1000 Message-ID: <1399253291-3975-15-git-send-email-gwshan@linux.vnet.ibm.com> References: <1399253291-3975-1-git-send-email-gwshan@linux.vnet.ibm.com> Cc: alex.williamson@redhat.com, benh@kernel.crashing.org, aik@ozlabs.ru, qiudayu@linux.vnet.ibm.com, Gavin Shan To: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org Return-path: Received: from e23smtp04.au.ibm.com ([202.81.31.146]:53253 "EHLO e23smtp04.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753890AbaEEB2D (ORCPT ); Sun, 4 May 2014 21:28:03 -0400 Received: from /spool/local by e23smtp04.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 5 May 2014 11:28:02 +1000 In-Reply-To: <1399253291-3975-1-git-send-email-gwshan@linux.vnet.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: The RTAS call "ibm,get-config-addr-info2" is being used by guest to retrieve the corresponding PE number for the specified PCI device. The patch implements the backend to support the emulation of the RTAS call. Signed-off-by: Gavin Shan --- arch/powerpc/platforms/powernv/eeh-rtas.c | 59 +++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/arch/powerpc/platforms/powernv/eeh-rtas.c b/arch/powerpc/platforms/powernv/eeh-rtas.c index 031ee8c..4a9c2c7 100644 --- a/arch/powerpc/platforms/powernv/eeh-rtas.c +++ b/arch/powerpc/platforms/powernv/eeh-rtas.c @@ -334,6 +334,62 @@ out: return ret; } +static int kvmppc_eeh_get_addr2(struct kvm_vcpu *vcpu, + struct rtas_args *args) +{ + struct pci_controller *hose; + struct pnv_phb *phb; + struct eeh_dev *edev; + struct eeh_pe *pe; + struct eeh_vfio_pci_addr addr; + int opcode; + int ret = 0; + + /* Sanity check on parameter */ + if (args->nargs != 4 || args->nret != 2) { + pr_warn("%s: Non-matched arguments (%d, %d) - (4, 2)\n", + __func__, args->nargs, args->nret); + ret = -3; + goto out; + } + + /* Check on the operation code */ + opcode = args->args[3]; + if (opcode != 0 && opcode != 1) { + pr_warn("%s: opcode %d out of range (0, 1)\n", + __func__, opcode); + ret = -3; + goto out; + } + + /* Figure out address */ + if (kvmppc_eeh_format_addr(vcpu, args, &addr, true, &edev, &pe)) { + ret = -3; + goto out; + } + + /* Insure that the EEH stuff has been initialized */ + hose = pe->phb; + phb = hose->private_data; + if (!(phb->flags & PNV_PHB_FLAG_EEH)) { + pr_warn("%s: EEH disabled on PHB#%d\n", + __func__, hose->global_number); + ret = -3; + goto out; + } + + /* + * Fill result according to opcode. We don't differentiate + * PCI bus and device sensitive PE here. + */ + if (opcode == 0) + args->rets[1] = pe->gaddr.pe_addr; + else + args->rets[1] = 1; +out: + return ret; +} + /** * kvmppc_eeh_rtas - Backend for EEH RTAS emulation * @vcpu: KVM virtual CPU @@ -359,6 +415,9 @@ void kvmppc_eeh_rtas(struct kvm_vcpu *vcpu, struct rtas_args *args, int op) case eeh_rtas_read_slot_reset_state2: ret = kvmppc_eeh_get_state2(vcpu, args); break; + case eeh_rtas_get_config_addr_info2: + ret = kvmppc_eeh_get_addr2(vcpu, args); + break; default: pr_warn("%s: Unsupported EEH RTAS service#%d\n", __func__, op); -- 1.8.3.2