From patchwork Thu Apr 28 07:05:38 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Xu X-Patchwork-Id: 616043 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qwSgH5BRgz9s36 for ; Thu, 28 Apr 2016 17:11:39 +1000 (AEST) Received: from localhost ([::1]:46912 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avg6q-0005lE-QG for incoming@patchwork.ozlabs.org; Thu, 28 Apr 2016 03:11:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41606) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avg23-0003zi-Vz for qemu-devel@nongnu.org; Thu, 28 Apr 2016 03:06:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1avg22-0007ek-Nk for qemu-devel@nongnu.org; Thu, 28 Apr 2016 03:06:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59209) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avg22-0007ef-HE for qemu-devel@nongnu.org; Thu, 28 Apr 2016 03:06:38 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3D66A7F6A8; Thu, 28 Apr 2016 07:06:38 +0000 (UTC) Received: from pxdev.xzpeter.org.com (dhcp-14-238.nay.redhat.com [10.66.14.238]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u3S75nNR007114; Thu, 28 Apr 2016 03:06:34 -0400 From: Peter Xu To: qemu-devel@nongnu.org Date: Thu, 28 Apr 2016 15:05:38 +0800 Message-Id: <1461827144-6937-13-git-send-email-peterx@redhat.com> In-Reply-To: <1461827144-6937-1-git-send-email-peterx@redhat.com> References: <1461827144-6937-1-git-send-email-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v5 12/18] ioapic: introduce ioapic_entry_parse() helper X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ehabkost@redhat.com, mst@redhat.com, jasowang@redhat.com, rkrcmar@redhat.com, peterx@redhat.com, alex.williamson@redhat.com, jan.kiszka@web.de, wexu@redhat.com, pbonzini@redhat.com, marcel@redhat.com, imammedo@redhat.com, rth@twiddle.net Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Abstract IOAPIC entry parsing logic into a helper function. Signed-off-by: Peter Xu --- hw/intc/ioapic.c | 110 +++++++++++++++++++++++++++---------------------------- 1 file changed, 54 insertions(+), 56 deletions(-) diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c index 92334a6..d6e88d5 100644 --- a/hw/intc/ioapic.c +++ b/hw/intc/ioapic.c @@ -49,18 +49,56 @@ static IOAPICCommonState *ioapics[MAX_IOAPICS]; /* global variable from ioapic_common.c */ extern int ioapic_no; +struct ioapic_entry_info { + /* fields parsed from IOAPIC entries */ + uint8_t masked; + uint8_t trig_mode; + uint16_t dest_idx; + uint8_t dest_mode; + uint8_t delivery_mode; + uint8_t vector; + + /* MSI message generated from above parsed fields */ + uint32_t addr; + uint32_t data; +}; + +static void ioapic_entry_parse(uint64_t entry, struct ioapic_entry_info *info) +{ + bzero(info, sizeof(*info)); + info->masked = (entry >> IOAPIC_LVT_MASKED_SHIFT) & 1; + info->trig_mode = (entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1; + /* + * By default, this would be dest_id[8] + reserved[8]. When IR + * is enabled, this would be interrupt_index[15] + + * interrupt_format[1]. This field never means anything, but + * only used to generate corresponding MSI. + */ + info->dest_idx = (entry >> IOAPIC_LVT_DEST_IDX_SHIFT) & 0xffff; + info->dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1; + info->delivery_mode = (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) \ + & IOAPIC_DM_MASK; + if (info->delivery_mode == IOAPIC_DM_EXTINT) { + info->vector = pic_read_irq(isa_pic); + } else { + info->vector = entry & IOAPIC_VECTOR_MASK; + } + + info->addr = APIC_DEFAULT_ADDRESS | \ + (info->dest_idx << MSI_ADDR_DEST_IDX_SHIFT) | \ + (info->dest_mode << MSI_ADDR_DEST_MODE_SHIFT); + info->data = (info->vector << MSI_DATA_VECTOR_SHIFT) | \ + (info->trig_mode << MSI_DATA_TRIGGER_SHIFT) | \ + (info->delivery_mode << MSI_DATA_DELIVERY_MODE_SHIFT); +} + static void ioapic_service(IOAPICCommonState *s) { AddressSpace *ioapic_as = PC_MACHINE(qdev_get_machine())->ioapic_as; - uint32_t addr, data; + struct ioapic_entry_info info; uint8_t i; - uint8_t trig_mode; - uint8_t vector; - uint8_t delivery_mode; uint32_t mask; uint64_t entry; - uint16_t dest_idx; - uint8_t dest_mode; for (i = 0; i < IOAPIC_NUM_PINS; i++) { mask = 1 << i; @@ -68,33 +106,18 @@ static void ioapic_service(IOAPICCommonState *s) int coalesce = 0; entry = s->ioredtbl[i]; - if (!(entry & IOAPIC_LVT_MASKED)) { - trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1); - /* - * By default, this would be dest_id[8] + - * reserved[8]. When IR is enabled, this would be - * interrupt_index[15] + interrupt_format[1]. This - * field never means anything, but only used to - * generate corresponding MSI. - */ - dest_idx = entry >> IOAPIC_LVT_DEST_IDX_SHIFT; - dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1; - delivery_mode = - (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK; - if (trig_mode == IOAPIC_TRIGGER_EDGE) { + ioapic_entry_parse(entry, &info); + if (!info.masked) { + if (info.trig_mode == IOAPIC_TRIGGER_EDGE) { s->irr &= ~mask; } else { coalesce = s->ioredtbl[i] & IOAPIC_LVT_REMOTE_IRR; s->ioredtbl[i] |= IOAPIC_LVT_REMOTE_IRR; } - if (delivery_mode == IOAPIC_DM_EXTINT) { - vector = pic_read_irq(isa_pic); - } else { - vector = entry & IOAPIC_VECTOR_MASK; - } + #ifdef CONFIG_KVM if (kvm_irqchip_is_split()) { - if (trig_mode == IOAPIC_TRIGGER_EDGE) { + if (info.trig_mode == IOAPIC_TRIGGER_EDGE) { kvm_set_irq(kvm_state, i, 1); kvm_set_irq(kvm_state, i, 0); } else { @@ -111,13 +134,7 @@ static void ioapic_service(IOAPICCommonState *s) * the IOAPIC message into a MSI one, and its * address space will decide whether we need a * translation. */ - addr = APIC_DEFAULT_ADDRESS | \ - (dest_idx << MSI_ADDR_DEST_IDX_SHIFT) | - (dest_mode << MSI_ADDR_DEST_MODE_SHIFT); - data = (vector << MSI_DATA_VECTOR_SHIFT) | - (trig_mode << MSI_DATA_TRIGGER_SHIFT) | - (delivery_mode << MSI_DATA_DELIVERY_MODE_SHIFT); - stl_le_phys(ioapic_as, addr, data); + stl_le_phys(ioapic_as, info.addr, info.data); } } } @@ -168,30 +185,11 @@ static void ioapic_update_kvm_routes(IOAPICCommonState *s) if (kvm_irqchip_is_split()) { for (i = 0; i < IOAPIC_NUM_PINS; i++) { - uint64_t entry = s->ioredtbl[i]; - uint8_t trig_mode; - uint8_t delivery_mode; - uint8_t dest; - uint8_t dest_mode; - uint64_t pin_polarity; MSIMessage msg; - - trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1); - dest = entry >> IOAPIC_LVT_DEST_SHIFT; - dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1; - pin_polarity = (entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1; - delivery_mode = - (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK; - - msg.address = APIC_DEFAULT_ADDRESS; - msg.address |= dest_mode << 2; - msg.address |= dest << 12; - - msg.data = entry & IOAPIC_VECTOR_MASK; - msg.data |= delivery_mode << APIC_DELIVERY_MODE_SHIFT; - msg.data |= pin_polarity << APIC_POLARITY_SHIFT; - msg.data |= trig_mode << APIC_TRIG_MODE_SHIFT; - + struct ioapic_entry_info info; + ioapic_entry_parse(s->ioredtbl[i], &info); + msg.address = info.addr; + msg.data = info.data; kvm_irqchip_update_msi_route(kvm_state, i, msg, NULL); } kvm_irqchip_commit_routes(kvm_state);