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hw/i386/xen/xen-hvm: Allow for stubbing xen_set_pci_link_route()

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The only user of xen_set_pci_link_route() is
xen_piix_pci_write_config_client() which implements PIIX-specific logic in
the xen namespace. This makes xen-hvm depend on PIIX which could be
avoided if xen_piix_pci_write_config_client() was implemented in PIIX. In
order to do this, xen_set_pci_link_route() needs to be stubbable which
this patch addresses.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Message-Id: <20220626094656.15673-2-shentey@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Bernhard Beschow 2022-06-26 11:46:55 +02:00 • committed by Laurent Vivier
parent 99337bd1e3
commit 21d87050af
4 changed files with 12 additions and 7 deletions
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7
hw/i386/xen/xen-hvm.c
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@ -161,11 +161,16 @@ void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
}
v &= 0xf;
if (((address + i) >= PIIX_PIRQCA) && ((address + i) <= PIIX_PIRQCD)) {
xen_set_pci_link_route(xen_domid, address + i - PIIX_PIRQCA, v);
xen_set_pci_link_route(address + i - PIIX_PIRQCA, v);
}
}
}
int xen_set_pci_link_route(uint8_t link, uint8_t irq)
{
return xendevicemodel_set_pci_link_route(xen_dmod, xen_domid, link, irq);
}
int xen_is_pirq_msi(uint32_t msi_data)
{
/* If vector is 0, the msi is remapped into a pirq, passed as