From nobody Mon Feb 9 06:20:30 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1535170074550118.48891589903292; Fri, 24 Aug 2018 21:07:54 -0700 (PDT) Received: from localhost ([::1]:44515 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ftPrV-0001ww-9O for importer@patchew.org; Sat, 25 Aug 2018 00:07:45 -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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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 *li= stener, =20 zone.addr =3D start; zone.size =3D size; - zone.pad =3D 0; + zone.pio =3D 0; =20 (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone); } @@ -553,7 +553,7 @@ static void kvm_uncoalesce_mmio_region(MemoryListener *= listener, =20 zone.addr =3D start; zone.size =3D size; - zone.pad =3D 0; + zone.pio =3D 0; =20 (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; }; =20 struct kvm_coalesced_mmio { __u64 phys_addr; __u32 len; - __u32 pad; + __u32 pio; __u8 data[8]; }; =20 @@ -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 =20 #ifdef KVM_CAP_IRQ_ROUTING =20 --=20 1.8.3.1 From nobody Mon Feb 9 06:20:30 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1535170193215365.9992640754234; Fri, 24 Aug 2018 21:09:53 -0700 (PDT) Received: from localhost ([::1]:44524 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ftPtY-0003Qw-2Z for importer@patchew.org; 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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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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, } } =20 +static void kvm_coalesce_pio_add(MemoryListener *listener, + MemoryRegionSection *section, + hwaddr start, hwaddr size) +{ + KVMState *s =3D kvm_state; + + if (s->coalesced_pio) { + struct kvm_coalesced_mmio_zone zone; + + zone.addr =3D start; + zone.size =3D size; + zone.pio =3D 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 =3D kvm_state; + + if (s->coalesced_pio) { + struct kvm_coalesced_mmio_zone zone; + + zone.addr =3D start; + zone.size =3D size; + zone.pio =3D 1; + + (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone); + } +} + +static MemoryListener kvm_coalesced_pio_listener =3D { + .coalesced_io_add =3D kvm_coalesce_pio_add, + .coalesced_io_del =3D 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) } =20 s->coalesced_mmio =3D kvm_check_extension(s, KVM_CAP_COALESCED_MMIO); + s->coalesced_pio =3D s->coalesced_mmio && + kvm_check_extension(s, KVM_CAP_COALESCED_PIO); =20 #ifdef KVM_CAP_VCPU_EVENTS s->vcpu_events =3D kvm_check_extension(s, KVM_CAP_VCPU_EVENTS); @@ -1687,13 +1729,15 @@ static int kvm_init(MachineState *ms) s->memory_listener.listener.eventfd_add =3D kvm_mem_ioeventfd_add; s->memory_listener.listener.eventfd_del =3D kvm_mem_ioeventfd_del; } - s->memory_listener.listener.coalesced_mmio_add =3D kvm_coalesce_mmio_r= egion; - s->memory_listener.listener.coalesced_mmio_del =3D kvm_uncoalesce_mmio= _region; + s->memory_listener.listener.coalesced_io_add =3D kvm_coalesce_mmio_reg= ion; + s->memory_listener.listener.coalesced_io_del =3D kvm_uncoalesce_mmio_r= egion; =20 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); =20 s->many_ioeventfds =3D kvm_check_many_ioeventfds(); =20 @@ -1775,8 +1819,13 @@ void kvm_flush_coalesced_mmio_buffer(void) struct kvm_coalesced_mmio *ent; =20 ent =3D &ring->coalesced_mmio[ring->first]; - - cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len); + if (ent->pio =3D=3D 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 =3D (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 *sec= tion, bool match_data, uint64_t data, EventNotifier *e); - void (*coalesced_mmio_add)(MemoryListener *listener, MemoryRegionSecti= on *section, + void (*coalesced_io_add)(MemoryListener *listener, MemoryRegionSection= *section, hwaddr addr, hwaddr len); - void (*coalesced_mmio_del)(MemoryListener *listener, MemoryRegionSecti= on *section, + void (*coalesced_io_del)(MemoryListener *listener, MemoryRegionSection= *section, hwaddr addr, hwaddr len); /* Lower =3D 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(M= emoryRegion *mr, AddressSpa .size =3D fr->addr.size, }; =20 - 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(M= emoryRegion *mr, AddressSpa continue; } tmp =3D addrrange_intersection(tmp, fr->addr); - MEMORY_LISTENER_CALL(as, coalesced_mmio_add, Forward, &sec= tion, + MEMORY_LISTENER_CALL(as, coalesced_io_add, Forward, §i= on, int128_get64(tmp.start), int128_get64(tmp.size)); } --=20 1.8.3.1 From nobody Mon Feb 9 06:20:30 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1535170076936640.4367820813357; 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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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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; =20 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 **er= rp) memory_region_init_io(&s->io, OBJECT(s), &cmos_ops, s, "rtc", 2); isa_register_ioport(isadev, &s->io, base); =20 + /* 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); =20 --=20 1.8.3.1 From nobody Mon Feb 9 06:20:30 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (208.118.235.17 [208.118.235.17]) by mx.zohomail.com with SMTPS id 1535170074532960.0329118337442; Fri, 24 Aug 2018 21:07:54 -0700 (PDT) Received: from localhost ([::1]:44517 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ftPrX-0001xq-07 for importer@patchew.org; Sat, 25 Aug 2018 00:07:47 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43538) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ftPpi-00016p-KD 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-0007nc-A1 for qemu-devel@nongnu.org; Sat, 25 Aug 2018 00:05:54 -0400 Received: from mxhk.zte.com.cn ([63.217.80.70]:51054) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ftPpe-0007l2-T0 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 DBC3C41A7FCCDEC4960D; Sat, 25 Aug 2018 12:05:45 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id w7P45LSj039015; Sat, 25 Aug 2018 12:05:21 +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 2018082512053060-6080242 ; 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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, E= rror **errp) =20 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); } =20 static void i440fx_realize(PCIDevice *dev, Error **errp) --=20 1.8.3.1