| Message ID | 20201016114328.18835-5-kraxel@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | RfC: microvm: add second ioapic | expand |
On Fri, 16 Oct 2020 13:43:28 +0200 Gerd Hoffmann <kraxel@redhat.com> wrote: > Use GSI 16+ for PCIe (needs acpi_build_madt() tweak). > Use GSI 24+ (second ioapic) for virtio-mmio. > Use all irq lines of the second ioapic > and allow up to 24 virtio-mmio devices. description is missing answer to question why it's done. > > Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> > --- > hw/i386/acpi-common.c | 2 +- > hw/i386/microvm.c | 6 +++++- > 2 files changed, 6 insertions(+), 2 deletions(-) > > diff --git a/hw/i386/acpi-common.c b/hw/i386/acpi-common.c > index f0689392a39f..1653a8315248 100644 > --- a/hw/i386/acpi-common.c > +++ b/hw/i386/acpi-common.c > @@ -122,7 +122,7 @@ void acpi_build_madt(GArray *table_data, BIOSLinker *linker, > intsrcovr->flags = cpu_to_le16(0); /* conforms to bus specifications */ > } > > - for (i = 1; i < 16; i++) { > + for (i = 1; i < 24; i++) { > if (!(x86ms->pci_irq_mask & (1 << i))) { > /* No need for a INT source override structure. */ > continue; > diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c > index 15c3e078a4aa..70bb8a4e3954 100644 > --- a/hw/i386/microvm.c > +++ b/hw/i386/microvm.c > @@ -205,7 +205,11 @@ static void microvm_devices_init(MicrovmMachineState *mms) > > mms->virtio_irq_base = 5; > mms->virtio_num_transports = 8; > - if (x86_machine_is_acpi_enabled(x86ms)) { > + if (ioapic2) { > + mms->pcie_irq_base = 16; > + mms->virtio_irq_base = 24; > + mms->virtio_num_transports = 24; > + } else if (x86_machine_is_acpi_enabled(x86ms)) { > mms->pcie_irq_base = 12; > mms->virtio_irq_base = 16; > }
On Fri, Oct 23, 2020 at 08:52:09PM +0200, Igor Mammedov wrote: > On Fri, 16 Oct 2020 13:43:28 +0200 > Gerd Hoffmann <kraxel@redhat.com> wrote: > > > Use GSI 16+ for PCIe (needs acpi_build_madt() tweak). > > Use GSI 24+ (second ioapic) for virtio-mmio. > > Use all irq lines of the second ioapic > > and allow up to 24 virtio-mmio devices. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > description is missing answer to question why it's done. It's right there. We can support more virtio devices then ;) take care, Gerd
diff --git a/hw/i386/acpi-common.c b/hw/i386/acpi-common.c index f0689392a39f..1653a8315248 100644 --- a/hw/i386/acpi-common.c +++ b/hw/i386/acpi-common.c @@ -122,7 +122,7 @@ void acpi_build_madt(GArray *table_data, BIOSLinker *linker, intsrcovr->flags = cpu_to_le16(0); /* conforms to bus specifications */ } - for (i = 1; i < 16; i++) { + for (i = 1; i < 24; i++) { if (!(x86ms->pci_irq_mask & (1 << i))) { /* No need for a INT source override structure. */ continue; diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c index 15c3e078a4aa..70bb8a4e3954 100644 --- a/hw/i386/microvm.c +++ b/hw/i386/microvm.c @@ -205,7 +205,11 @@ static void microvm_devices_init(MicrovmMachineState *mms) mms->virtio_irq_base = 5; mms->virtio_num_transports = 8; - if (x86_machine_is_acpi_enabled(x86ms)) { + if (ioapic2) { + mms->pcie_irq_base = 16; + mms->virtio_irq_base = 24; + mms->virtio_num_transports = 24; + } else if (x86_machine_is_acpi_enabled(x86ms)) { mms->pcie_irq_base = 12; mms->virtio_irq_base = 16; }
Use GSI 16+ for PCIe (needs acpi_build_madt() tweak). Use GSI 24+ (second ioapic) for virtio-mmio. Use all irq lines of the second ioapic and allow up to 24 virtio-mmio devices. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> --- hw/i386/acpi-common.c | 2 +- hw/i386/microvm.c | 6 +++++- 2 files changed, 6 insertions(+), 2 deletions(-)