From patchwork Thu Jul 16 04:44:29 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Williamson X-Patchwork-Id: 496561 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 05A571402B2 for ; Thu, 16 Jul 2015 14:45:10 +1000 (AEST) Received: from localhost ([::1]:38402 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZFb2h-00005A-V1 for incoming@patchwork.ozlabs.org; Thu, 16 Jul 2015 00:45:07 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40420) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZFb28-0007Rh-9j for qemu-devel@nongnu.org; Thu, 16 Jul 2015 00:44:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZFb26-0004mY-Nb for qemu-devel@nongnu.org; Thu, 16 Jul 2015 00:44:32 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54466) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZFb26-0004mL-DV for qemu-devel@nongnu.org; Thu, 16 Jul 2015 00:44:30 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id EEC898E3C4; Thu, 16 Jul 2015 04:44:29 +0000 (UTC) Received: from gimli.home (ovpn-113-117.phx2.redhat.com [10.3.113.117]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t6G4iTgk000463; Thu, 16 Jul 2015 00:44:29 -0400 From: Alex Williamson To: alex.williamson@redhat.com, qemu-devel@nongnu.org Date: Wed, 15 Jul 2015 22:44:29 -0600 Message-ID: <20150716044429.7436.17747.stgit@gimli.home> In-Reply-To: <20150716044143.7436.26523.stgit@gimli.home> References: <20150716044143.7436.26523.stgit@gimli.home> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: thorsten.kohfeldt@gmx.de Subject: [Qemu-devel] [PATCH 2/2] vfio/pci: Cleanup RTL8168 quirk and tracing X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org There's quite a bit of cleanup that can be done to the RTL8168 quirk, as well as the tracing to prevent a spew of uninteresting accesses for anything else the driver might choose to use the window registers for besides the MSI-X table. There should be no functional change, but it's now possible to get compact and useful traces by enabling vfio_rtl8168_quirk*, ex: vfio_rtl8168_quirk_write 0000:04:00.0 [address]: 0x1f000 vfio_rtl8168_quirk_read 0000:04:00.0 [address]: 0x8001f000 vfio_rtl8168_quirk_read 0000:04:00.0 [data]: 0xfee0100c vfio_rtl8168_quirk_write 0000:04:00.0 [address]: 0x1f004 vfio_rtl8168_quirk_read 0000:04:00.0 [address]: 0x8001f004 vfio_rtl8168_quirk_read 0000:04:00.0 [data]: 0x0 vfio_rtl8168_quirk_write 0000:04:00.0 [address]: 0x1f008 vfio_rtl8168_quirk_read 0000:04:00.0 [address]: 0x8001f008 vfio_rtl8168_quirk_read 0000:04:00.0 [data]: 0x49b1 vfio_rtl8168_quirk_write 0000:04:00.0 [address]: 0x1f00c vfio_rtl8168_quirk_read 0000:04:00.0 [address]: 0x8001f00c vfio_rtl8168_quirk_read 0000:04:00.0 [data]: 0x0 Signed-off-by: Alex Williamson --- hw/vfio/pci.c | 88 ++++++++++++++++++++++++--------------------------------- trace-events | 10 +++--- 2 files changed, 41 insertions(+), 57 deletions(-) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 0af762a..70d82d4 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -1509,44 +1509,29 @@ static uint64_t vfio_rtl8168_window_quirk_read(void *opaque, { VFIOQuirk *quirk = opaque; VFIOPCIDevice *vdev = quirk->vdev; + uint64_t val = 0; + + if (!quirk->data.flags) { /* Non-MSI-X table access */ + return vfio_region_read(&vdev->bars[quirk->data.bar].region, + addr + 0x70, size); + } switch (addr) { case 4: /* address */ - if (quirk->data.flags) { - trace_vfio_rtl8168_window_quirk_read_fake( - memory_region_name(&quirk->mem), - vdev->vbasedev.name); - - return quirk->data.address_match ^ 0x80000000U; - } + val = quirk->data.address_match ^ 0x80000000U; /* latch/complete */ break; case 0: /* data */ - if (quirk->data.flags) { - uint64_t val; - - trace_vfio_rtl8168_window_quirk_read_table( - memory_region_name(&quirk->mem), - vdev->vbasedev.name); - - if (!(vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX)) { - return 0; - } - + if ((vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX)) { memory_region_dispatch_read(&vdev->pdev.msix_table_mmio, - (hwaddr)(quirk->data.address_match - & 0xfff), - &val, - size, - MEMTXATTRS_UNSPECIFIED); - return val; + (hwaddr)(quirk->data.address_match & 0xfff), + &val, size, MEMTXATTRS_UNSPECIFIED); } + break; } - trace_vfio_rtl8168_window_quirk_read_direct(memory_region_name(&quirk->mem), - vdev->vbasedev.name); - - return vfio_region_read(&vdev->bars[quirk->data.bar].region, - addr + 0x70, size); + trace_vfio_rtl8168_quirk_read(vdev->vbasedev.name, + addr ? "address" : "data", val); + return val; } static void vfio_rtl8168_window_quirk_write(void *opaque, hwaddr addr, @@ -1557,36 +1542,36 @@ static void vfio_rtl8168_window_quirk_write(void *opaque, hwaddr addr, switch (addr) { case 4: /* address */ - if ((data & 0x7fff0000) == 0x10000) { - if (data & 0x80000000U && - vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX) { - - trace_vfio_rtl8168_window_quirk_write_table( - memory_region_name(&quirk->mem), - vdev->vbasedev.name); - - memory_region_dispatch_write(&vdev->pdev.msix_table_mmio, - (hwaddr)(data & 0xfff), - (uint64_t)quirk->data.address_mask, - size, MEMTXATTRS_UNSPECIFIED); - } - - quirk->data.flags = 1; + if ((data & 0x7fff0000) == 0x10000) { /* MSI-X table */ + quirk->data.flags = 1; /* Activate reads */ quirk->data.address_match = data; - return; + trace_vfio_rtl8168_quirk_write(vdev->vbasedev.name, data); + + if (data & 0x80000000U) { /* Do write */ + if (vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX) { + hwaddr offset = data & 0xfff; + uint64_t val = quirk->data.address_mask; + + trace_vfio_rtl8168_quirk_msix(vdev->vbasedev.name, + (uint16_t)offset, val); + + /* Write to the proper guest MSI-X table instead */ + memory_region_dispatch_write(&vdev->pdev.msix_table_mmio, + offset, val, size, + MEMTXATTRS_UNSPECIFIED); + } + return; /* Do not write guest MSI-X data to hardware */ + } + } else { + quirk->data.flags = 0; /* De-activate reads, non-MSI-X */ } - quirk->data.flags = 0; break; case 0: /* data */ quirk->data.address_mask = data; break; } - trace_vfio_rtl8168_window_quirk_write_direct( - memory_region_name(&quirk->mem), - vdev->vbasedev.name); - vfio_region_write(&vdev->bars[quirk->data.bar].region, addr + 0x70, data, size); } @@ -1623,8 +1608,9 @@ static void vfio_probe_rtl8168_bar2_window_quirk(VFIOPCIDevice *vdev, int nr) QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next); - trace_vfio_probe_rtl8168_bar2_window_quirk(vdev->vbasedev.name); + trace_vfio_rtl8168_quirk_enable(vdev->vbasedev.name); } + /* * Trap the BAR2 MMIO window to config space as well. */ diff --git a/trace-events b/trace-events index 2d395c5..eec9c3d 100644 --- a/trace-events +++ b/trace-events @@ -1542,12 +1542,10 @@ vfio_ati_3c3_quirk_read(uint64_t data) " (0x3c3, 1) = 0x%"PRIx64 vfio_vga_probe_ati_3c3_quirk(const char *name) "Enabled ATI/AMD quirk 0x3c3 BAR4for device %s" vfio_probe_ati_bar4_window_quirk(const char *name) "Enabled ATI/AMD BAR4 window quirk for device %s" #issue with ) -vfio_rtl8168_window_quirk_read_fake(const char *region_name, const char *name) "%s fake read(%s" -vfio_rtl8168_window_quirk_read_table(const char *region_name, const char *name) "%s MSI-X table read(%s" -vfio_rtl8168_window_quirk_read_direct(const char *region_name, const char *name) "%s direct read(%s" -vfio_rtl8168_window_quirk_write_table(const char *region_name, const char *name) "%s MSI-X table write(%s" -vfio_rtl8168_window_quirk_write_direct(const char *region_name, const char *name) "%s direct write(%s" -vfio_probe_rtl8168_bar2_window_quirk(const char *name) "Enabled RTL8168 BAR2 window quirk for device %s" +vfio_rtl8168_quirk_read(const char *name, const char *type, uint64_t val) "%s [%s]: 0x%"PRIx64 +vfio_rtl8168_quirk_write(const char *name, uint64_t val) "%s [address]: 0x%"PRIx64 +vfio_rtl8168_quirk_msix(const char *name, uint16_t offset, uint64_t val) "%s MSI-X table write[0x%x]: 0x%"PRIx64 +vfio_rtl8168_quirk_enable(const char *name) "%s" vfio_probe_ati_bar2_4000_quirk(const char *name) "Enabled ATI/AMD BAR2 0x4000 quirk for device %s" vfio_nvidia_3d0_quirk_read(int size, uint64_t data) " (0x3d0, %d) = 0x%"PRIx64 vfio_nvidia_3d0_quirk_write(uint64_t data, int size) " (0x3d0, 0x%"PRIx64", %d)"