On May 15, 2025, at 6:54 AM, Daniel P. Berrangé <berrange@redhat.com> wrote: On Wed, May 14, 2025 at 05:18:50PM -0700, Matthew R. Ochs wrote:
Add support for generating QEMU command line with PCI high memory MMIO size: - Add highmem-mmio-size to machine command line generation using size conveyed through pcihole64 - Add validation for aarch64/virt machine type requirement - Add capability check for QEMU support
This enables configuring the PCI high memory MMIO window size for aarch64 virt machine types using the existing pcihole64 element.
Signed-off-by: Matthew R. Ochs <mochs@nvidia.com> --- src/qemu/qemu_command.c | 14 +++++++++++++- src/qemu/qemu_validate.c | 8 ++++++-- 2 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index e6d308534f87..1386b2772a55 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -6195,7 +6195,8 @@ qemuBuildGlobalControllerCommandLine(virCommand *cmd, for (i = 0; i < def->ncontrollers; i++) { virDomainControllerDef *cont = def->controllers[i]; if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI && - cont->opts.pciopts.pcihole64) { + cont->opts.pciopts.pcihole64 && + !qemuDomainIsARMVirt(def)) {
This ought to be a positive check
..IsQ35(..) || ..IsI440FX(..)
Makes sense, will fix in v3.
diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c index b2c3c9e2f631..f808aac1063a 100644 --- a/src/qemu/qemu_validate.c +++ b/src/qemu/qemu_validate.c @@ -4074,7 +4074,9 @@ qemuValidateDomainDeviceDefControllerPCI(const virDomainControllerDef *cont, switch ((virDomainControllerModelPCI) cont->model) { case VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT: if (pciopts->pcihole64 || pciopts->pcihole64size != 0) { - if (!qemuDomainIsI440FX(def)) { + if (!qemuDomainIsI440FX(def) && + !(qemuDomainIsARMVirt(def) && virQEMUCapsGet(qemuCaps, + QEMU_CAPS_MACHINE_VIRT_HIGHMEM_MMIO_SIZE))) { virReportError(VIR_ERR_CONFIG_UNSUPPORTED, _("Setting the 64-bit PCI hole size is not supported for machine '%1$s'"), def->os.machine);
IIUC arm virt machine is always PCI-E, so we shouldn't allow it for arm here.
Yep, will remove this change in v3.