| Message ID | 20201001082834.15821-5-kraxel@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | microvm: add usb support | expand |
On Thu, 1 Oct 2020 10:28:29 +0200 Gerd Hoffmann <kraxel@redhat.com> wrote: > Wire up "usb=on" machine option, when enabled add > a sysbus xhci controller with 8 ports. first pci, and now usb - not so micro anymore. why not just reuse pci to add usb controller? what/how much do we win avoiding PCI? > > Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> > --- > include/hw/i386/microvm.h | 5 ++++- > hw/i386/acpi-microvm.c | 9 +++++++++ > hw/i386/microvm.c | 13 +++++++++++++ > 3 files changed, 26 insertions(+), 1 deletion(-) > > diff --git a/include/hw/i386/microvm.h b/include/hw/i386/microvm.h > index 91b064575d55..0fc216007777 100644 > --- a/include/hw/i386/microvm.h > +++ b/include/hw/i386/microvm.h > @@ -41,7 +41,7 @@ > * 7 | parallel | > * 8 | rtc | rtc (rtc=on) > * 9 | acpi | acpi (ged) > - * 10 | pci lnk | > + * 10 | pci lnk | xhci (usb=on) > * 11 | pci lnk | > * 12 | ps2 | pcie > * 13 | fpu | pcie > @@ -60,6 +60,9 @@ > #define GED_MMIO_BASE_REGS (GED_MMIO_BASE + 0x200) > #define GED_MMIO_IRQ 9 > > +#define MICROVM_XHCI_BASE 0xfe900000 > +#define MICROVM_XHCI_IRQ 10 > + > #define PCIE_MMIO_BASE 0xc0000000 > #define PCIE_MMIO_SIZE 0x20000000 > #define PCIE_ECAM_BASE 0xe0000000 > diff --git a/hw/i386/acpi-microvm.c b/hw/i386/acpi-microvm.c > index f16f2311955c..7e8a6894ba26 100644 > --- a/hw/i386/acpi-microvm.c > +++ b/hw/i386/acpi-microvm.c > @@ -35,6 +35,7 @@ > #include "hw/i386/microvm.h" > #include "hw/pci/pci.h" > #include "hw/pci/pcie_host.h" > +#include "hw/usb/xhci.h" > #include "hw/virtio/virtio-mmio.h" > > #include "acpi-common.h" > @@ -89,6 +90,13 @@ static void acpi_dsdt_add_virtio(Aml *scope, > } > } > > +static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms) > +{ > + if (machine_usb(MACHINE(mms))) { > + xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ); > + } > +} > + > static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms) > { > if (mms->pcie != ON_OFF_AUTO_ON) { > @@ -123,6 +131,7 @@ build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, > GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); > acpi_dsdt_add_power_button(sb_scope); > acpi_dsdt_add_virtio(sb_scope, mms); > + acpi_dsdt_add_xhci(sb_scope, mms); > acpi_dsdt_add_pci(sb_scope, mms); > aml_append(dsdt, sb_scope); > > diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c > index 17e3f2f15265..0f61fc61ca44 100644 > --- a/hw/i386/microvm.c > +++ b/hw/i386/microvm.c > @@ -47,6 +47,7 @@ > #include "hw/acpi/acpi.h" > #include "hw/acpi/generic_event_device.h" > #include "hw/pci-host/gpex.h" > +#include "hw/usb/xhci.h" > > #include "cpu.h" > #include "elf.h" > @@ -197,6 +198,18 @@ static void microvm_devices_init(MicrovmMachineState *mms) > x86ms->acpi_dev = HOTPLUG_HANDLER(dev); > } > > + if (x86_machine_is_acpi_enabled(x86ms) && machine_usb(MACHINE(mms))) { > + DeviceState *dev = qdev_new(TYPE_XHCI_SYSBUS); > + qdev_prop_set_uint32(dev, "intrs", 1); > + qdev_prop_set_uint32(dev, "slots", XHCI_MAXSLOTS); > + qdev_prop_set_uint32(dev, "p2", 8); > + qdev_prop_set_uint32(dev, "p3", 8); > + sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal); > + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, MICROVM_XHCI_BASE); > + sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, > + x86ms->gsi[MICROVM_XHCI_IRQ]); > + } > + > if (x86_machine_is_acpi_enabled(x86ms) && mms->pcie == ON_OFF_AUTO_ON) { > /* use topmost 25% of the address space available */ > hwaddr phys_size = (hwaddr)1 << X86_CPU(first_cpu)->phys_bits;
On Tue, Oct 06, 2020 at 12:03:26PM +0200, Igor Mammedov wrote: > On Thu, 1 Oct 2020 10:28:29 +0200 > Gerd Hoffmann <kraxel@redhat.com> wrote: > > > Wire up "usb=on" machine option, when enabled add > > a sysbus xhci controller with 8 ports. > > first pci, and now usb - not so micro anymore. Both pcie and usb are optional and disabled by default. > why not just reuse pci to add usb controller? > what/how much do we win avoiding PCI? Didn't benchmark stuff myself, but there are several reports that the pcie initialization by the linux kernel at boot is noticable (lots of vmexits for pci config space access). IIRC this is also the reason why microvm started without pci support in the first place. So being able to enable usb without having to enable pcie too looks useful to me. But, yes, functionality-wise there isn't much of a difference between "-microvm usb=on" and "-microvm pcie=on -device qemu-xhci". take care, Gerd
diff --git a/include/hw/i386/microvm.h b/include/hw/i386/microvm.h index 91b064575d55..0fc216007777 100644 --- a/include/hw/i386/microvm.h +++ b/include/hw/i386/microvm.h @@ -41,7 +41,7 @@ * 7 | parallel | * 8 | rtc | rtc (rtc=on) * 9 | acpi | acpi (ged) - * 10 | pci lnk | + * 10 | pci lnk | xhci (usb=on) * 11 | pci lnk | * 12 | ps2 | pcie * 13 | fpu | pcie @@ -60,6 +60,9 @@ #define GED_MMIO_BASE_REGS (GED_MMIO_BASE + 0x200) #define GED_MMIO_IRQ 9 +#define MICROVM_XHCI_BASE 0xfe900000 +#define MICROVM_XHCI_IRQ 10 + #define PCIE_MMIO_BASE 0xc0000000 #define PCIE_MMIO_SIZE 0x20000000 #define PCIE_ECAM_BASE 0xe0000000 diff --git a/hw/i386/acpi-microvm.c b/hw/i386/acpi-microvm.c index f16f2311955c..7e8a6894ba26 100644 --- a/hw/i386/acpi-microvm.c +++ b/hw/i386/acpi-microvm.c @@ -35,6 +35,7 @@ #include "hw/i386/microvm.h" #include "hw/pci/pci.h" #include "hw/pci/pcie_host.h" +#include "hw/usb/xhci.h" #include "hw/virtio/virtio-mmio.h" #include "acpi-common.h" @@ -89,6 +90,13 @@ static void acpi_dsdt_add_virtio(Aml *scope, } } +static void acpi_dsdt_add_xhci(Aml *scope, MicrovmMachineState *mms) +{ + if (machine_usb(MACHINE(mms))) { + xhci_sysbus_build_aml(scope, MICROVM_XHCI_BASE, MICROVM_XHCI_IRQ); + } +} + static void acpi_dsdt_add_pci(Aml *scope, MicrovmMachineState *mms) { if (mms->pcie != ON_OFF_AUTO_ON) { @@ -123,6 +131,7 @@ build_dsdt_microvm(GArray *table_data, BIOSLinker *linker, GED_MMIO_IRQ, AML_SYSTEM_MEMORY, GED_MMIO_BASE); acpi_dsdt_add_power_button(sb_scope); acpi_dsdt_add_virtio(sb_scope, mms); + acpi_dsdt_add_xhci(sb_scope, mms); acpi_dsdt_add_pci(sb_scope, mms); aml_append(dsdt, sb_scope); diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c index 17e3f2f15265..0f61fc61ca44 100644 --- a/hw/i386/microvm.c +++ b/hw/i386/microvm.c @@ -47,6 +47,7 @@ #include "hw/acpi/acpi.h" #include "hw/acpi/generic_event_device.h" #include "hw/pci-host/gpex.h" +#include "hw/usb/xhci.h" #include "cpu.h" #include "elf.h" @@ -197,6 +198,18 @@ static void microvm_devices_init(MicrovmMachineState *mms) x86ms->acpi_dev = HOTPLUG_HANDLER(dev); } + if (x86_machine_is_acpi_enabled(x86ms) && machine_usb(MACHINE(mms))) { + DeviceState *dev = qdev_new(TYPE_XHCI_SYSBUS); + qdev_prop_set_uint32(dev, "intrs", 1); + qdev_prop_set_uint32(dev, "slots", XHCI_MAXSLOTS); + qdev_prop_set_uint32(dev, "p2", 8); + qdev_prop_set_uint32(dev, "p3", 8); + sysbus_realize(SYS_BUS_DEVICE(dev), &error_fatal); + sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, MICROVM_XHCI_BASE); + sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, + x86ms->gsi[MICROVM_XHCI_IRQ]); + } + if (x86_machine_is_acpi_enabled(x86ms) && mms->pcie == ON_OFF_AUTO_ON) { /* use topmost 25% of the address space available */ hwaddr phys_size = (hwaddr)1 << X86_CPU(first_cpu)->phys_bits;
Wire up "usb=on" machine option, when enabled add a sysbus xhci controller with 8 ports. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> --- include/hw/i386/microvm.h | 5 ++++- hw/i386/acpi-microvm.c | 9 +++++++++ hw/i386/microvm.c | 13 +++++++++++++ 3 files changed, 26 insertions(+), 1 deletion(-)