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qemu: Improve qemuDomainSupportsPCIMultibus()

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Rewrite the function so that it's more compact and easier to
extend as new architectures, which will likely come with
multibus support right out the gate, are introduced.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Andrea Bolognani 2024-01-17 09:53:19 +01:00
parent 176c3b105e
commit 5df470f47d
1 changed files with 7 additions and 14 deletions
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21
src/qemu/qemu_domain.c
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@ -9088,23 +9088,16 @@ qemuDomainSupportsPCI(const virDomainDef *def)
bool
qemuDomainSupportsPCIMultibus(const virDomainDef *def)
{
/* x86_64 and i686 support PCI-multibus on all machine types
* since forever */
if (ARCH_IS_X86(def->os.arch))
return true;
/* PPC supports multibus on all machine types which have pci since qemu-2.0.0 */
if (def->os.arch == VIR_ARCH_PPC ||
ARCH_IS_PPC64(def->os.arch)) {
/* Most architectures support multibus for all machine types on
* all supported QEMU versions */
if (ARCH_IS_X86(def->os.arch) ||
ARCH_IS_PPC(def->os.arch) ||
ARCH_IS_S390(def->os.arch)) {
return true;
}
/* S390 supports PCI-multibus. */
if (ARCH_IS_S390(def->os.arch))
return true;
/* If the virt machine, both on ARM and RISC-V, supports PCI,
* then it also supports multibus */
/* In some cases, support for multibus is limited to some machine
* types */
if (qemuDomainIsARMVirt(def) ||
qemuDomainIsRISCVVirt(def)) {
return true;