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[Qemu-devel] [PATCH] pci: Don't deliver MSI/MSI-X messages if bus master
From: |
Jan Kiszka |
Subject: |
[Qemu-devel] [PATCH] pci: Don't deliver MSI/MSI-X messages if bus master support is off |
Date: |
Sat, 19 Jul 2014 18:55:48 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
From: Jan Kiszka <address@hidden>
The spec says (and real HW confirms this) that, if the bus master bit
is 0, the device will not generate any PCI accesses. MSI and MSI-X
messages fall among these.
Signed-off-by: Jan Kiszka <address@hidden>
---
hw/pci/msi.c | 4 ++++
hw/pci/msix.c | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/hw/pci/msi.c b/hw/pci/msi.c
index a4a3040..36b651b 100644
--- a/hw/pci/msi.c
+++ b/hw/pci/msi.c
@@ -285,6 +285,10 @@ void msi_notify(PCIDevice *dev, unsigned int vector)
return;
}
+ if (!(pci_get_word(dev->config + PCI_COMMAND) & PCI_COMMAND_MASTER)) {
+ return;
+ }
+
msg = msi_get_message(dev, vector);
MSI_DEV_PRINTF(dev,
diff --git a/hw/pci/msix.c b/hw/pci/msix.c
index 5c49bfc..c77ae7d 100644
--- a/hw/pci/msix.c
+++ b/hw/pci/msix.c
@@ -437,6 +437,10 @@ void msix_notify(PCIDevice *dev, unsigned vector)
return;
}
+ if (!(pci_get_word(dev->config + PCI_COMMAND) & PCI_COMMAND_MASTER)) {
+ return;
+ }
+
msg = msix_get_message(dev, vector);
stl_le_phys(&address_space_memory, msg.address, msg.data);
--
1.8.1.1.298.ge7eed54
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- [Qemu-devel] [PATCH] pci: Don't deliver MSI/MSI-X messages if bus master support is off,
Jan Kiszka <=
Re: [Qemu-devel] [PATCH] pci: Don't deliver MSI/MSI-X messages if bus master support is off, Paolo Bonzini, 2014/07/21