From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58427) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aj52S-0005jO-8J for qemu-devel@nongnu.org; Thu, 24 Mar 2016 09:11:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aj52O-0003Cn-85 for qemu-devel@nongnu.org; Thu, 24 Mar 2016 09:11:00 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58760) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aj52O-0003Cd-2w for qemu-devel@nongnu.org; Thu, 24 Mar 2016 09:10:56 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (Postfix) with ESMTPS id 77D51AA0CD for ; Thu, 24 Mar 2016 13:10:54 +0000 (UTC) Date: Thu, 24 Mar 2016 15:10:52 +0200 From: "Michael S. Tsirkin" Message-ID: <1458825035-21171-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [Qemu-devel] [PATCH] pci-testdev: fast mmio support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com Teach PCI testdev to use fast MMIO when kvm makes it available. Before: mmio-wildcard-eventfd:pci-mem 2271 After: mmio-wildcard-eventfd:pci-mem 1218 Signed-off-by: Michael S. Tsirkin --- hw/misc/pci-testdev.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/hw/misc/pci-testdev.c b/hw/misc/pci-testdev.c index 5df9089..2f2e989 100644 --- a/hw/misc/pci-testdev.c +++ b/hw/misc/pci-testdev.c @@ -239,6 +239,7 @@ static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp) uint8_t *pci_conf; char *name; int r, i; + bool fastmmio = kvm_ioeventfd_any_length_enabled(); pci_conf = pci_dev->config; @@ -261,8 +262,12 @@ static void pci_testdev_realize(PCIDevice *pci_dev, Error **errp) memcpy(test->hdr->name, name, strlen(name) + 1); g_free(name); test->hdr->offset = cpu_to_le32(IOTEST_SIZE(i) + i * IOTEST_ACCESS_WIDTH); - test->size = IOTEST_ACCESS_WIDTH; test->match_data = strcmp(IOTEST_TEST(i), "wildcard-eventfd"); + if (fastmmio && IOTEST_IS_MEM(i) && !test->match_data) { + test->size = 0; + } else { + test->size = IOTEST_ACCESS_WIDTH; + } test->hdr->test = i; test->hdr->data = test->match_data ? IOTEST_DATAMATCH : IOTEST_NOMATCH; test->hdr->width = IOTEST_ACCESS_WIDTH; -- MST