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From 7596bd04d37a608d06cf7a2f589a67d332a21dfb Mon Sep 17 00:00:00 2001
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From: Alex Williamson <alex.williamson@redhat.com>
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Date: Fri, 1 Nov 2013 19:50:26 +0100
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Subject: [PATCH 01/25] pci-assign: Add MSI affinity support
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RH-Author: Alex Williamson <alex.williamson@redhat.com>
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Message-id: <20131101195026.25461.63530.stgit@bling.home>
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Patchwork-id: 55233
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O-Subject: [RHEL7 qemu-kvm PATCH 1/3] pci-assign: Add MSI affinity support
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Bugzilla: 1025877
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RH-Acked-by: Bandan Das <bsd@redhat.com>
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Orit Wasserman <owasserm@redhat.com>
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Bugzilla: 1025877
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Upstream commit: 3459f01b2d9612070ec23221a4ccb60a41b775ae
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To support guest MSI affinity changes update the MSI message any time
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the guest writes to the address or data fields.
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Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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Acked-by: Michael S. Tsirkin <mst@redhat.com>
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Message-id: 20130513201840.5430.86331.stgit@bling.home
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Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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---
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hw/i386/kvm/pci-assign.c | 18 ++++++++++++++++++
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1 file changed, 18 insertions(+)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/i386/kvm/pci-assign.c | 18 ++++++++++++++++++
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1 files changed, 18 insertions(+), 0 deletions(-)
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diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
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index 1684f8c..221a8f7 100644
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--- a/hw/i386/kvm/pci-assign.c
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+++ b/hw/i386/kvm/pci-assign.c
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@@ -1026,6 +1026,21 @@ static void assigned_dev_update_msi(PCIDevice *pci_dev)
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}
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}
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+static void assigned_dev_update_msi_msg(PCIDevice *pci_dev)
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+{
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+ AssignedDevice *assigned_dev = DO_UPCAST(AssignedDevice, dev, pci_dev);
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+ uint8_t ctrl_byte = pci_get_byte(pci_dev->config + pci_dev->msi_cap +
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+ PCI_MSI_FLAGS);
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+
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+ if (assigned_dev->assigned_irq_type != ASSIGNED_IRQ_MSI ||
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+ !(ctrl_byte & PCI_MSI_FLAGS_ENABLE)) {
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+ return;
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+ }
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+
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+ kvm_irqchip_update_msi_route(kvm_state, assigned_dev->msi_virq[0],
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+ msi_get_message(pci_dev, 0));
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+}
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+
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static bool assigned_dev_msix_masked(MSIXTableEntry *entry)
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{
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return (entry->ctrl & cpu_to_le32(0x1)) != 0;
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@@ -1201,6 +1216,9 @@ static void assigned_dev_pci_write_config(PCIDevice *pci_dev, uint32_t address,
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if (range_covers_byte(address, len,
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pci_dev->msi_cap + PCI_MSI_FLAGS)) {
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assigned_dev_update_msi(pci_dev);
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+ } else if (ranges_overlap(address, len, /* 32bit MSI only */
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+ pci_dev->msi_cap + PCI_MSI_ADDRESS_LO, 6)) {
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+ assigned_dev_update_msi_msg(pci_dev);
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}
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}
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if (assigned_dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {
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--
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1.7.1
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