From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60085) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aoRMr-00006k-MV for qemu-devel@nongnu.org; Fri, 08 Apr 2016 04:02:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aoRMq-0005ax-O7 for qemu-devel@nongnu.org; Fri, 08 Apr 2016 04:02:13 -0400 Received: from mx1.redhat.com ([209.132.183.28]:63680) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aoRMq-0005at-Iz for qemu-devel@nongnu.org; Fri, 08 Apr 2016 04:02:12 -0400 Date: Fri, 8 Apr 2016 11:02:09 +0300 From: "Michael S. Tsirkin" Message-ID: <1460102154-16096-3-git-send-email-mst@redhat.com> References: <1460102154-16096-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1460102154-16096-1-git-send-email-mst@redhat.com> Subject: [Qemu-devel] [PULL 02/15] pci-testdev: fast mmio support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peter Maydell 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