From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp04.au.ibm.com (e23smtp04.au.ibm.com [202.81.31.146]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3727F140176 for ; Mon, 5 May 2014 11:28:00 +1000 (EST) 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 11:27:59 +1000 Received: from d23relay04.au.ibm.com (d23relay04.au.ibm.com [9.190.234.120]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id 003FA357804F for ; Mon, 5 May 2014 11:27:57 +1000 (EST) Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by d23relay04.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s4516o7k459208 for ; Mon, 5 May 2014 11:06:50 +1000 Received: from d23av04.au.ibm.com (localhost [127.0.0.1]) by d23av04.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s451RudA011753 for ; Mon, 5 May 2014 11:27:56 +1000 From: Gavin Shan To: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org Subject: [PATCH 11/22] powerpc/eeh: Emulate RTAS call ibm,set-eeh-option Date: Mon, 5 May 2014 11:28:00 +1000 Message-Id: <1399253291-3975-12-git-send-email-gwshan@linux.vnet.ibm.com> In-Reply-To: <1399253291-3975-1-git-send-email-gwshan@linux.vnet.ibm.com> References: <1399253291-3975-1-git-send-email-gwshan@linux.vnet.ibm.com> Cc: aik@ozlabs.ru, alex.williamson@redhat.com, qiudayu@linux.vnet.ibm.com, Gavin Shan List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The RTAS call "ibm,set-eeh-option" is being used to enable/disable EEH functionality on the specified PE, or enable MMIO/DMA for the frozen PE. The patch emulates the RTAS call. Signed-off-by: Gavin Shan --- arch/powerpc/platforms/powernv/eeh-rtas.c | 83 +++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) diff --git a/arch/powerpc/platforms/powernv/eeh-rtas.c b/arch/powerpc/platforms/powernv/eeh-rtas.c index f04b820..1a037fd 100644 --- a/arch/powerpc/platforms/powernv/eeh-rtas.c +++ b/arch/powerpc/platforms/powernv/eeh-rtas.c @@ -91,6 +91,86 @@ static int kvmppc_eeh_format_addr(struct kvm_vcpu *vcpu, return 0; } +static int kvmppc_eeh_set_option(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; + bool is_legacy = false; + int ret = 0; + + /* Sanity check on parameter */ + if (args->nargs != 4 || args->nret != 1) { + pr_warn("%s: Non-matched arguments (%d, %d) - (4, 1)\n", + __func__, args->nargs, args->nret); + ret = -3; + goto out; + } + + /* Check on opcode */ + opcode = args->args[3]; + if (opcode < EEH_OPT_DISABLE || opcode > EEH_OPT_THAW_DMA) { + pr_warn("%s: opcode %d out of range (%d, %d)\n", + __func__, opcode, EEH_OPT_DISABLE, EEH_OPT_THAW_DMA); + ret = -3; + goto out; + } + + if (opcode == EEH_OPT_ENABLE) + is_legacy = true; + + /* Figure out the address */ + if (kvmppc_eeh_format_addr(vcpu, args, &addr, is_legacy, &edev, &pe)) { + ret = -7; + 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 = -7; + goto out; + } + + /* + * The EEH functionality has been enabled on all PEs + * by default. So just return success. The same situation + * would be applied while we disable EEH functionality. + * However, the guest isn't expected to disable that + * at all. + */ + if (opcode == EEH_OPT_DISABLE || + opcode == EEH_OPT_ENABLE) { + ret = 0; + goto out; + } + + /* + * Call into the IODA dependent backend in order + * to enable DMA or MMIO for the indicated PE. + */ + if (phb->eeh_ops && phb->eeh_ops->set_option) { + if (phb->eeh_ops->set_option(pe, opcode)) { + pr_warn("%s: Failure from backend\n", + __func__); + ret = -1; + } + } else { + pr_warn("%s: Unsupported request\n", + __func__); + ret = -7; + } +out: + return ret; +} + /** * kvmppc_eeh_rtas - Backend for EEH RTAS emulation * @vcpu: KVM virtual CPU @@ -107,6 +187,9 @@ void kvmppc_eeh_rtas(struct kvm_vcpu *vcpu, struct rtas_args *args, int op) /* Parse the requested service */ switch (op) { + case eeh_rtas_set_option: + ret = kvmppc_eeh_set_option(vcpu, args); + break; default: pr_warn("%s: Unsupported EEH RTAS service#%d\n", __func__, op); -- 1.8.3.2