| Message ID | 20210203225637.18614-2-gpiccoli@canonical.com |
|---|---|
| State | New |
| Headers | show |
| Series | Enable CONFIG_PCI_MSI in the linux-kvm derivative | expand |
diff --git a/debian.kvm/config/config.common.ubuntu b/debian.kvm/config/config.common.ubuntu index a650ad095efa..24e7d8ef685f 100644 --- a/debian.kvm/config/config.common.ubuntu +++ b/debian.kvm/config/config.common.ubuntu @@ -1858,7 +1858,12 @@ CONFIG_PCI_DOMAINS=y CONFIG_PCI_LABEL=y CONFIG_PCI_LOCKLESS_CONFIG=y # CONFIG_PCI_MMCONFIG is not set -# CONFIG_PCI_MSI is not set +CONFIG_PCI_MSI=y +CONFIG_GENERIC_MSI_IRQ=y +CONFIG_PCI_MSI_IRQ_DOMAIN=y +CONFIG_GENERIC_MSI_IRQ_DOMAIN=y +# CONFIG_PCIE_DW_PLAT is not set +# CONFIG_VMD is not set # CONFIG_PCI_PASID is not set # CONFIG_PCI_PRI is not set CONFIG_PCI_QUIRKS=y
BugLink: https://bugs.launchpad.net/bugs/1914283 Currently linux-kvm does not have CONFIG_PCI_MSI (and the necessary ancillary flags) enabled, due to the nature of this derivative (to have as few configs enabled as possible, being a minimal kernel). But after some experiments, we've noticed that after enabling PCI_MSI we had slighlty faster boot times and a small performance increase in virtual devices (virtio-blk and virtio-net were tested). Hence, this commit enables such options. Signed-off-by: Guilherme G. Piccoli <gpiccoli@canonical.com> --- debian.kvm/config/config.common.ubuntu | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)