From patchwork Sat Aug 25 12:19:47 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Hao X-Patchwork-Id: 10576021 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E427D920 for ; Sat, 25 Aug 2018 04:07:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D45D7285CB for ; Sat, 25 Aug 2018 04:07:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C79D82B693; Sat, 25 Aug 2018 04:07:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=2.0 tests=BAYES_00,DATE_IN_FUTURE_06_12, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 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 mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BDD7E285CB for ; Sat, 25 Aug 2018 04:07:16 +0000 (UTC) Received: from localhost ([::1]:44515 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ftPr1-0001ww-BB for patchwork-qemu-devel@patchwork.kernel.org; Sat, 25 Aug 2018 00:07:15 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43537) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ftPpi-00016o-K3 for qemu-devel@nongnu.org; Sat, 25 Aug 2018 00:05:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ftPpf-0007nh-AJ for qemu-devel@nongnu.org; Sat, 25 Aug 2018 00:05:54 -0400 Received: from out1.zte.com.cn ([202.103.147.172]:38192 helo=mxct.zte.com.cn) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ftPpe-0007l5-T1 for qemu-devel@nongnu.org; Sat, 25 Aug 2018 00:05:51 -0400 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id A9424453D2BC09594867; Sat, 25 Aug 2018 12:05:46 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id w7P45G08038995; Sat, 25 Aug 2018 12:05:16 +0800 (GMT-8) (envelope-from peng.hao2@zte.com.cn) Received: from localhost.localdomain.localdomain ([10.74.120.59]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2018082512052588-6080239 ; Sat, 25 Aug 2018 12:05:25 +0800 From: Peng Hao To: pbonzini@redhat.com, mst@redhat.com, ehabkost@redhat.com, rkrcmar@redhat.com Date: Sat, 25 Aug 2018 20:19:47 +0800 Message-Id: <1535199590-68475-2-git-send-email-peng.hao2@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1535199590-68475-1-git-send-email-peng.hao2@zte.com.cn> References: <1535199590-68475-1-git-send-email-peng.hao2@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2018-08-25 12:05:25, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2018-08-25 12:04:57, Serialize complete at 2018-08-25 12:04:57 X-MAIL: mse01.zte.com.cn w7P45G08038995 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 202.103.147.172 Subject: [Qemu-devel] [PATCH V4 1/4] target-i386: introduce coalesced_pio kvm header update 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: Peng Hao , zhong.weidong@zte.com.cn, qemu-devel@nongnu.org, kvm@vger.kernel.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP add coalesced_pio's struct and KVM_CAP_COALESCED_PIO header. Signed-off-by: Peng Hao --- accel/kvm/kvm-all.c | 4 ++-- linux-headers/linux/kvm.h | 5 +++-- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index eb7db92..4a3909d 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -536,7 +536,7 @@ static void kvm_coalesce_mmio_region(MemoryListener *listener, zone.addr = start; zone.size = size; - zone.pad = 0; + zone.pio = 0; (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); } @@ -553,7 +553,7 @@ static void kvm_uncoalesce_mmio_region(MemoryListener *listener, zone.addr = start; zone.size = size; - zone.pad = 0; + zone.pio = 0; (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); } diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h index 98f389a..747b473 100644 --- a/linux-headers/linux/kvm.h +++ b/linux-headers/linux/kvm.h @@ -420,13 +420,13 @@ struct kvm_run { struct kvm_coalesced_mmio_zone { __u64 addr; __u32 size; - __u32 pad; + __u32 pio; }; struct kvm_coalesced_mmio { __u64 phys_addr; __u32 len; - __u32 pad; + __u32 pio; __u8 data[8]; }; @@ -949,6 +949,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_GET_MSR_FEATURES 153 #define KVM_CAP_HYPERV_EVENTFD 154 #define KVM_CAP_HYPERV_TLBFLUSH 155 +#define KVM_CAP_COALESCED_PIO 156 #ifdef KVM_CAP_IRQ_ROUTING From patchwork Sat Aug 25 12:19:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Hao X-Patchwork-Id: 10576029 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8FCDA1390 for ; Sat, 25 Aug 2018 04:09:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 816762B655 for ; Sat, 25 Aug 2018 04:09:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 75EC72B668; Sat, 25 Aug 2018 04:09:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=2.0 tests=BAYES_00,DATE_IN_FUTURE_06_12, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 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 mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 062D92B656 for ; 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Sat, 25 Aug 2018 12:05:17 +0800 (GMT-8) (envelope-from peng.hao2@zte.com.cn) Received: from localhost.localdomain.localdomain ([10.74.120.59]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2018082512052727-6080240 ; Sat, 25 Aug 2018 12:05:27 +0800 From: Peng Hao To: pbonzini@redhat.com, mst@redhat.com, ehabkost@redhat.com, rkrcmar@redhat.com Date: Sat, 25 Aug 2018 20:19:48 +0800 Message-Id: <1535199590-68475-3-git-send-email-peng.hao2@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1535199590-68475-1-git-send-email-peng.hao2@zte.com.cn> References: <1535199590-68475-1-git-send-email-peng.hao2@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2018-08-25 12:05:27, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2018-08-25 12:04:58, Serialize complete at 2018-08-25 12:04:58 X-MAIL: mse01.zte.com.cn w7P45Hr5039011 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 63.217.80.70 Subject: [Qemu-devel] [PATCH V4 2/4] target-i386:add coalesced_pio API 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: Peng Hao , zhong.weidong@zte.com.cn, qemu-devel@nongnu.org, kvm@vger.kernel.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Peng Hao Reviewed-by: Eduardo Habkost --- accel/kvm/kvm-all.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++---- include/exec/memory.h | 4 ++-- memory.c | 4 ++-- 3 files changed, 57 insertions(+), 8 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 4a3909d..11d8d78 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -78,6 +78,7 @@ struct KVMState int fd; int vmfd; int coalesced_mmio; + int coalesced_pio; struct kvm_coalesced_mmio_ring *coalesced_mmio_ring; bool coalesced_flush_in_progress; int vcpu_events; @@ -559,6 +560,45 @@ static void kvm_uncoalesce_mmio_region(MemoryListener *listener, } } +static void kvm_coalesce_pio_add(MemoryListener *listener, + MemoryRegionSection *section, + hwaddr start, hwaddr size) +{ + KVMState *s = kvm_state; + + if (s->coalesced_pio) { + struct kvm_coalesced_mmio_zone zone; + + zone.addr = start; + zone.size = size; + zone.pio = 1; + + (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); + } +} + +static void kvm_coalesce_pio_del(MemoryListener *listener, + MemoryRegionSection *section, + hwaddr start, hwaddr size) +{ + KVMState *s = kvm_state; + + if (s->coalesced_pio) { + struct kvm_coalesced_mmio_zone zone; + + zone.addr = start; + zone.size = size; + zone.pio = 1; + + (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); + } +} + +static MemoryListener kvm_coalesced_pio_listener = { + .coalesced_io_add = kvm_coalesce_pio_add, + .coalesced_io_del = kvm_coalesce_pio_del, +}; + int kvm_check_extension(KVMState *s, unsigned int extension) { int ret; @@ -1615,6 +1655,8 @@ static int kvm_init(MachineState *ms) } s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); + s->coalesced_pio = s->coalesced_mmio && + kvm_check_extension(s, KVM_CAP_COALESCED_PIO); #ifdef KVM_CAP_VCPU_EVENTS s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); @@ -1687,13 +1729,15 @@ static int kvm_init(MachineState *ms) s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add; s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del; } - s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region; - s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region; + s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region; + s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region; kvm_memory_listener_register(s, &s->memory_listener, &address_space_memory, 0); memory_listener_register(&kvm_io_listener, &address_space_io); + memory_listener_register(&kvm_coalesced_pio_listener, + &address_space_io); s->many_ioeventfds = kvm_check_many_ioeventfds(); @@ -1775,8 +1819,13 @@ void kvm_flush_coalesced_mmio_buffer(void) struct kvm_coalesced_mmio *ent; ent = &ring->coalesced_mmio[ring->first]; - - cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); + if (ent->pio == 1) { + address_space_rw(&address_space_io, ent->phys_addr, + MEMTXATTRS_UNSPECIFIED, ent->data, + ent->len, true); + } else { + cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); + } smp_wmb(); ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX; } diff --git a/include/exec/memory.h b/include/exec/memory.h index 448d41a..4600fa3 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -410,9 +410,9 @@ struct MemoryListener { bool match_data, uint64_t data, EventNotifier *e); void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section, bool match_data, uint64_t data, EventNotifier *e); - void (*coalesced_mmio_add)(MemoryListener *listener, MemoryRegionSection *section, + void (*coalesced_io_add)(MemoryListener *listener, MemoryRegionSection *section, hwaddr addr, hwaddr len); - void (*coalesced_mmio_del)(MemoryListener *listener, MemoryRegionSection *section, + void (*coalesced_io_del)(MemoryListener *listener, MemoryRegionSection *section, hwaddr addr, hwaddr len); /* Lower = earlier (during add), later (during del) */ unsigned priority; diff --git a/memory.c b/memory.c index e9cd446..8b0311e 100644 --- a/memory.c +++ b/memory.c @@ -2126,7 +2126,7 @@ static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpa .size = fr->addr.size, }; - MEMORY_LISTENER_CALL(as, coalesced_mmio_del, Reverse, §ion, + MEMORY_LISTENER_CALL(as, coalesced_io_del, Reverse, §ion, int128_get64(fr->addr.start), int128_get64(fr->addr.size)); QTAILQ_FOREACH(cmr, &mr->coalesced, link) { @@ -2137,7 +2137,7 @@ static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpa continue; } tmp = addrrange_intersection(tmp, fr->addr); - MEMORY_LISTENER_CALL(as, coalesced_mmio_add, Forward, §ion, + MEMORY_LISTENER_CALL(as, coalesced_io_add, Forward, §ion, int128_get64(tmp.start), int128_get64(tmp.size)); } From patchwork Sat Aug 25 12:19:49 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Hao X-Patchwork-Id: 10576025 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E94F0920 for ; Sat, 25 Aug 2018 04:07:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D910A285CB for ; Sat, 25 Aug 2018 04:07:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CD6192A8BE; Sat, 25 Aug 2018 04:07:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=2.0 tests=BAYES_00,DATE_IN_FUTURE_06_12, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 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 mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BDE1B2A7D6 for ; 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Sat, 25 Aug 2018 12:05:19 +0800 (GMT-8) (envelope-from peng.hao2@zte.com.cn) Received: from localhost.localdomain.localdomain ([10.74.120.59]) by szsmtp06.zte.com.cn (Lotus Domino Release 8.5.3FP6) with ESMTP id 2018082512052921-6080241 ; Sat, 25 Aug 2018 12:05:29 +0800 From: Peng Hao To: pbonzini@redhat.com, mst@redhat.com, ehabkost@redhat.com, rkrcmar@redhat.com Date: Sat, 25 Aug 2018 20:19:49 +0800 Message-Id: <1535199590-68475-4-git-send-email-peng.hao2@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1535199590-68475-1-git-send-email-peng.hao2@zte.com.cn> References: <1535199590-68475-1-git-send-email-peng.hao2@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2018-08-25 12:05:29, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2018-08-25 12:05:00, Serialize complete at 2018-08-25 12:05:00 X-MAIL: mse01.zte.com.cn w7P45J6x039012 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 202.103.147.172 Subject: [Qemu-devel] [PATCH V4 3/4] target-i386: add rtc 0x70 port as coalesced_pio 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: Peng Hao , zhong.weidong@zte.com.cn, qemu-devel@nongnu.org, kvm@vger.kernel.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Peng Hao --- hw/timer/mc146818rtc.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/hw/timer/mc146818rtc.c b/hw/timer/mc146818rtc.c index 6f1f723..b19ef51 100644 --- a/hw/timer/mc146818rtc.c +++ b/hw/timer/mc146818rtc.c @@ -70,6 +70,7 @@ typedef struct RTCState { ISADevice parent_obj; MemoryRegion io; + MemoryRegion coalesced_io; uint8_t cmos_data[128]; uint8_t cmos_index; int32_t base_year; @@ -990,6 +991,13 @@ static void rtc_realizefn(DeviceState *dev, Error **errp) memory_region_init_io(&s->io, OBJECT(s), &cmos_ops, s, "rtc", 2); isa_register_ioport(isadev, &s->io, base); + /* register rtc 0x70 port for coalesced_pio */ + memory_region_set_flush_coalesced(&s->io); + memory_region_init_io(&s->coalesced_io, OBJECT(s), &cmos_ops, + s, "rtc1", 1); + isa_register_ioport(isadev, &s->coalesced_io, base); + memory_region_add_coalescing(&s->coalesced_io, 0, 1); + qdev_set_legacy_instance_id(dev, base, 3); qemu_register_reset(rtc_reset, s); From patchwork Sat Aug 25 12:19:50 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peng Hao X-Patchwork-Id: 10576023 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 16838174A for ; 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Sat, 25 Aug 2018 12:05:30 +0800 From: Peng Hao To: pbonzini@redhat.com, mst@redhat.com, ehabkost@redhat.com, rkrcmar@redhat.com Date: Sat, 25 Aug 2018 20:19:50 +0800 Message-Id: <1535199590-68475-5-git-send-email-peng.hao2@zte.com.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1535199590-68475-1-git-send-email-peng.hao2@zte.com.cn> References: <1535199590-68475-1-git-send-email-peng.hao2@zte.com.cn> X-MIMETrack: Itemize by SMTP Server on SZSMTP06/server/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2018-08-25 12:05:30, Serialize by Router on notes_smtp/zte_ltd(Release 9.0.1FP7|August 17, 2016) at 2018-08-25 12:05:02, Serialize complete at 2018-08-25 12:05:02 X-MAIL: mse01.zte.com.cn w7P45LSj039015 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 63.217.80.70 Subject: [Qemu-devel] [PATCH V4 4/4] target-i386: add i440fx 0xcf8 port as coalesced_pio 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: Peng Hao , zhong.weidong@zte.com.cn, qemu-devel@nongnu.org, kvm@vger.kernel.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Peng Hao --- hw/pci-host/piix.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c index 0e60834..da73743 100644 --- a/hw/pci-host/piix.c +++ b/hw/pci-host/piix.c @@ -327,6 +327,10 @@ static void i440fx_pcihost_realize(DeviceState *dev, Error **errp) sysbus_add_io(sbd, 0xcfc, &s->data_mem); sysbus_init_ioports(sbd, 0xcfc, 4); + + /* register i440fx 0xcf8 port as coalesced pio */ + memory_region_set_flush_coalesced(&s->data_mem); + memory_region_add_coalescing(&s->conf_mem, 0, 4); } static void i440fx_realize(PCIDevice *dev, Error **errp)