On Tue, 29 Aug 2023, Vikram Garhwal wrote: > From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> > > In order to use virtio backends we need to allocate virtio-mmio > parameters (irq and base) and register corresponding buses. > > Use the constants defined in public header arch-arm.h to be > aligned with the toolstack. So the number of current supported > virtio-mmio devices is 10. > > For the interrupts triggering use already existing on Arm > device-model hypercall. > > The toolstack should then insert the same amount of device nodes > into guest device-tree. > > Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> > Signed-off-by: Vikram Garhwal <vikram.garh...@amd.com>
Reviewed-by: Stefano Stabellini <sstabell...@kernel.org> > --- > hw/arm/xen_arm.c | 35 +++++++++++++++++++++++++++++++++++ > include/hw/xen/xen_native.h | 16 ++++++++++++++++ > 2 files changed, 51 insertions(+) > > diff --git a/hw/arm/xen_arm.c b/hw/arm/xen_arm.c > index 1d3e6d481a..7393b37355 100644 > --- a/hw/arm/xen_arm.c > +++ b/hw/arm/xen_arm.c > @@ -26,6 +26,7 @@ > #include "qapi/qapi-commands-migration.h" > #include "qapi/visitor.h" > #include "hw/boards.h" > +#include "hw/irq.h" > #include "hw/sysbus.h" > #include "sysemu/block-backend.h" > #include "sysemu/tpm_backend.h" > @@ -59,6 +60,38 @@ struct XenArmState { > } cfg; > }; > > +/* > + * VIRTIO_MMIO_DEV_SIZE is imported from tools/libs/light/libxl_arm.c under > Xen > + * repository. > + * > + * Origin: git://xenbits.xen.org/xen.git 2128143c114c > + */ > +#define VIRTIO_MMIO_DEV_SIZE 0x200 > + > +#define NR_VIRTIO_MMIO_DEVICES \ > + (GUEST_VIRTIO_MMIO_SPI_LAST - GUEST_VIRTIO_MMIO_SPI_FIRST) > + > +static void xen_set_irq(void *opaque, int irq, int level) > +{ > + xendevicemodel_set_irq_level(xen_dmod, xen_domid, irq, level); > +} > + > +static void xen_create_virtio_mmio_devices(XenArmState *xam) > +{ > + int i; > + > + for (i = 0; i < NR_VIRTIO_MMIO_DEVICES; i++) { > + hwaddr base = GUEST_VIRTIO_MMIO_BASE + i * VIRTIO_MMIO_DEV_SIZE; > + qemu_irq irq = qemu_allocate_irq(xen_set_irq, NULL, > + GUEST_VIRTIO_MMIO_SPI_FIRST + i); > + > + sysbus_create_simple("virtio-mmio", base, irq); > + > + DPRINTF("Created virtio-mmio device %d: irq %d base 0x%lx\n", > + i, GUEST_VIRTIO_MMIO_SPI_FIRST + i, base); > + } > +} > + > void arch_handle_ioreq(XenIOState *state, ioreq_t *req) > { > hw_error("Invalid ioreq type 0x%x\n", req->type); > @@ -110,6 +143,8 @@ static void xen_arm_init(MachineState *machine) > > xen_register_ioreq(xam->state, machine->smp.cpus, &xen_memory_listener); > > + xen_create_virtio_mmio_devices(xam); > + > #ifdef CONFIG_TPM > if (xam->cfg.tpm_base_addr) { > xen_enable_tpm(xam); > diff --git a/include/hw/xen/xen_native.h b/include/hw/xen/xen_native.h > index 4dce905fde..a4b1aa9e5d 100644 > --- a/include/hw/xen/xen_native.h > +++ b/include/hw/xen/xen_native.h > @@ -523,4 +523,20 @@ static inline int xen_set_ioreq_server_state(domid_t dom, > enable); > } > > +#if CONFIG_XEN_CTRL_INTERFACE_VERSION <= 41500 > +static inline int xendevicemodel_set_irq_level(xendevicemodel_handle *dmod, > + domid_t domid, uint32_t irq, > + unsigned int level) > +{ > + return 0; > +} > +#endif > + > +#if CONFIG_XEN_CTRL_INTERFACE_VERSION <= 41700 > +#define GUEST_VIRTIO_MMIO_BASE xen_mk_ullong(0x02000000) > +#define GUEST_VIRTIO_MMIO_SIZE xen_mk_ullong(0x00100000) > +#define GUEST_VIRTIO_MMIO_SPI_FIRST 33 > +#define GUEST_VIRTIO_MMIO_SPI_LAST 43 > +#endif > + > #endif /* QEMU_HW_XEN_NATIVE_H */ > -- > 2.17.1 >