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pcie: Helper functions to check to check if PRI is enabled

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pri_enabled can be used to check whether the capability is present and
enabled on a PCIe device

Signed-off-by: Clement Mathieu--Drif <clement.mathieu--drif@eviden.com>
Message-Id: <20250520071823.764266-6-clement.mathieu--drif@eviden.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
CLEMENT MATHIEU--DRIF 2025-05-20 07:18:57 +00:00 • committed by Michael S. Tsirkin
parent dcad6cb2ab
commit 5be8cf7918
2 changed files with 10 additions and 0 deletions
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9
hw/pci/pcie.c
View file

@ -1266,6 +1266,15 @@ void pcie_pri_init(PCIDevice *dev, uint16_t offset, uint32_t outstanding_pr_cap,
dev->exp.pri_cap = offset;
}
bool pcie_pri_enabled(const PCIDevice *dev)
{
if (!pci_is_express(dev) || !dev->exp.pri_cap) {
return false;
}
return (pci_get_word(dev->config + dev->exp.pri_cap + PCI_PRI_CTRL) &
PCI_PRI_CTRL_ENABLE) != 0;
}
bool pcie_pasid_enabled(const PCIDevice *dev)
{
if (!pci_is_express(dev) || !dev->exp.pasid_cap) {

1
include/hw/pci/pcie.h
View file

@ -158,6 +158,7 @@ void pcie_pasid_init(PCIDevice *dev, uint16_t offset, uint8_t pasid_width,
void pcie_pri_init(PCIDevice *dev, uint16_t offset, uint32_t outstanding_pr_cap,
bool prg_response_pasid_req);
bool pcie_pri_enabled(const PCIDevice *dev);
bool pcie_pasid_enabled(const PCIDevice *dev);
bool pcie_ats_enabled(const PCIDevice *dev);
#endif /* QEMU_PCIE_H */