From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gavin Shan Subject: [PATCH 13/22] powerpc/eeh: Emulate RTAS call ibm,read-slot-reset-state2 Date: Mon, 5 May 2014 11:28:02 +1000 Message-ID: <1399253291-3975-14-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 e23smtp09.au.ibm.com ([202.81.31.142]:42246 "EHLO e23smtp09.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754058AbaEEB2C (ORCPT ); Sun, 4 May 2014 21:28:02 -0400 Received: from /spool/local by e23smtp09.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 5 May 2014 11:28:01 +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,read-slot-reset-state2" is being used to retrieve the various states of the specified PE, e.g. reset state, frozen DMA, frozen MMIO etc. The patch implements the backend to emulate the RTAS call. Signed-off-by: Gavin Shan --- arch/powerpc/platforms/powernv/eeh-rtas.c | 77 +++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) diff --git a/arch/powerpc/platforms/powernv/eeh-rtas.c b/arch/powerpc/platforms/powernv/eeh-rtas.c index 3e38d13..031ee8c 100644 --- a/arch/powerpc/platforms/powernv/eeh-rtas.c +++ b/arch/powerpc/platforms/powernv/eeh-rtas.c @@ -260,6 +260,80 @@ out: return ret; } +static int kvmppc_eeh_get_state2(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 result, ret = 0; + + /* Sanity check on parameter */ + if (args->nargs != 3 || (args->nret != 4 && args->nret != 5)) { + pr_warn("%s: Non-matched argument (%d, %d) - (3, 4/5)\n", + __func__, args->nargs, args->nret); + ret = -3; + goto out; + } + + /* Figure out the address */ + if (kvmppc_eeh_format_addr(vcpu, args, &addr, false, &edev, &pe)) { + ret = -3; + goto out; + } + + /* Make sure 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; + args->rets[2] = 0; + goto out; + } + + /* + * Mark EEH supported on the PCI device. Otherwise, + * the PE state is meaningless to the guest + */ + args->rets[2] = 1; + + /* Call to the IOC dependent function */ + if (phb->eeh_ops && phb->eeh_ops->get_state) { + result = phb->eeh_ops->get_state(pe); + + if (!(result & EEH_STATE_RESET_ACTIVE) && + (result & EEH_STATE_DMA_ENABLED) && + (result & EEH_STATE_MMIO_ENABLED)) + args->rets[1] = 0; + else if (result & EEH_STATE_RESET_ACTIVE) + args->rets[1] = 1; + else if (!(result & EEH_STATE_RESET_ACTIVE) && + !(result & EEH_STATE_DMA_ENABLED) && + !(result & EEH_STATE_MMIO_ENABLED)) + args->rets[1] = 2; + else if (!(result & EEH_STATE_RESET_ACTIVE) && + (result & EEH_STATE_DMA_ENABLED) && + !(result & EEH_STATE_MMIO_ENABLED)) + args->rets[1] = 4; + else { + args->rets[1] = 5; + args->rets[3] = 1000; + } + + ret = 0; + } else { + pr_warn("%s: Unsupported request\n", + __func__); + ret = -3; + } +out: + return ret; +} + /** * kvmppc_eeh_rtas - Backend for EEH RTAS emulation * @vcpu: KVM virtual CPU @@ -282,6 +356,9 @@ void kvmppc_eeh_rtas(struct kvm_vcpu *vcpu, struct rtas_args *args, int op) case eeh_rtas_set_slot_reset: ret = kvmppc_eeh_set_reset(vcpu, args); break; + case eeh_rtas_read_slot_reset_state2: + ret = kvmppc_eeh_get_state2(vcpu, args); + break; default: pr_warn("%s: Unsupported EEH RTAS service#%d\n", __func__, op); -- 1.8.3.2