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[Qemu-devel] [kvm-unit-tests PATCH 2/8] pci: introduce pci_msi_set_enabl
From: |
Peter Xu |
Subject: |
[Qemu-devel] [kvm-unit-tests PATCH 2/8] pci: introduce pci_msi_set_enable() |
Date: |
Fri, 30 Dec 2016 16:55:54 +0800 |
Generalize this function out of pci_setup_msi(), then it can be further
used to enable INTx (or, disable MSI).
Signed-off-by: Peter Xu <address@hidden>
---
lib/pci.c | 19 +++++++++++++++++--
lib/pci.h | 1 +
2 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/lib/pci.c b/lib/pci.c
index a7cfacb..5062036 100644
--- a/lib/pci.c
+++ b/lib/pci.c
@@ -39,6 +39,22 @@ void pci_cap_walk(struct pci_dev *dev)
}
}
+void pci_msi_set_enable(struct pci_dev *dev, bool enabled)
+{
+ uint16_t msi_control;
+ uint16_t offset;
+
+ offset = dev->msi_offset;
+ msi_control = pci_config_readw(dev->bdf, offset + PCI_MSI_FLAGS);
+
+ if (enabled)
+ msi_control |= PCI_MSI_FLAGS_ENABLE;
+ else
+ msi_control &= ~PCI_MSI_FLAGS_ENABLE;
+
+ pci_config_writew(dev->bdf, offset + PCI_MSI_FLAGS, msi_control);
+}
+
bool pci_setup_msi(struct pci_dev *dev, uint64_t msi_addr, uint32_t msi_data)
{
uint16_t msi_control;
@@ -69,8 +85,7 @@ bool pci_setup_msi(struct pci_dev *dev, uint64_t msi_addr,
uint32_t msi_data)
}
printf("addr=0x%lx, data=0x%x\n", msi_addr, msi_data);
- msi_control |= PCI_MSI_FLAGS_ENABLE;
- pci_config_writew(addr, offset + PCI_MSI_FLAGS, msi_control);
+ pci_msi_set_enable(dev, true);
return true;
}
diff --git a/lib/pci.h b/lib/pci.h
index df86951..0815754 100644
--- a/lib/pci.h
+++ b/lib/pci.h
@@ -65,6 +65,7 @@ extern bool pci_bar_is_valid(struct pci_dev *dev, int
bar_num);
extern void pci_bar_print(struct pci_dev *dev, int bar_num);
extern void pci_dev_print_id(pcidevaddr_t dev);
extern uint8_t pci_intx_line(struct pci_dev *dev);
+void pci_msi_set_enable(struct pci_dev *dev, bool enabled);
extern int pci_testdev(void);
--
2.7.4
- [Qemu-devel] [kvm-unit-tests PATCH 0/8] VT-d ioapic irq test, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 1/8] pci: introduce pci_intx_line(), Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 2/8] pci: introduce pci_msi_set_enable(),
Peter Xu <=
- [Qemu-devel] [kvm-unit-tests PATCH 3/8] lib/asm-generic: add atomic.h, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 4/8] x86: ioapic: generalize trigger mode, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 5/8] intel-iommu: add report prefixes, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 6/8] intel-iommu: use atomic ops for irte index alloc, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 7/8] intel-iommu: allow setup trigger mode for irte, Peter Xu, 2016/12/30
- [Qemu-devel] [kvm-unit-tests PATCH 8/8] intel-iommu: add ioapic irq test, Peter Xu, 2016/12/30