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pcie: Add a PCIe capability version helper

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Report the PCIe capability version for a device

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Robin Voetter <robin@streamhpc.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Alex Williamson 2023-05-26 17:15:57 -06:00 committed by Cédric Le Goater
parent 1360b2ad1f
commit cf2916f6a1
2 changed files with 8 additions and 0 deletions
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7
hw/pci/pcie.c
View file

@ -274,6 +274,13 @@ uint8_t pcie_cap_get_type(const PCIDevice *dev)
PCI_EXP_FLAGS_TYPE) >> PCI_EXP_FLAGS_TYPE_SHIFT;
}
uint8_t pcie_cap_get_version(const PCIDevice *dev)
{
uint32_t pos = dev->exp.exp_cap;
assert(pos > 0);
return pci_get_word(dev->config + pos + PCI_EXP_FLAGS) & PCI_EXP_FLAGS_VERS;
}
/* MSI/MSI-X */
/* pci express interrupt message number */
/* 7.8.2 PCI Express Capabilities Register: Interrupt Message Number */

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

@ -93,6 +93,7 @@ void pcie_cap_exit(PCIDevice *dev);
int pcie_endpoint_cap_v1_init(PCIDevice *dev, uint8_t offset);
void pcie_cap_v1_exit(PCIDevice *dev);
uint8_t pcie_cap_get_type(const PCIDevice *dev);
uint8_t pcie_cap_get_version(const PCIDevice *dev);
void pcie_cap_flags_set_vector(PCIDevice *dev, uint8_t vector);
uint8_t pcie_cap_flags_get_vector(PCIDevice *dev);