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hw/riscv/virt: Add IOMMU as platform device if the option is set

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Add a new machine option called 'iommu-sys' that enables a
riscv-iommu-sys platform device for the 'virt' machine. The option is
default 'off'.

The device will use IRQs 36 to 39.

We will not support both riscv-iommu-sys and riscv-iommu-pci devices in
the same board in this first implementation. If a riscv-iommu-pci device
is added in the command line we will disable the riscv-iommu-sys device.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20241106133407.604587-5-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Sunil V L 2024-11-06 10:34:04 -03:00 • committed by Alistair Francis
parent 5b128435dc
commit 2c12de1460
3 changed files with 109 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/hw/riscv/iommu.h
View file

@ -37,4 +37,6 @@ typedef struct RISCVIOMMUStatePci RISCVIOMMUStatePci;
OBJECT_DECLARE_SIMPLE_TYPE(RISCVIOMMUStateSys, RISCV_IOMMU_SYS)
typedef struct RISCVIOMMUStateSys RISCVIOMMUStateSys;
#define FDT_IRQ_TYPE_EDGE_LOW 1
#endif

6
include/hw/riscv/virt.h
View file

@ -62,6 +62,7 @@ struct RISCVVirtState {
OnOffAuto acpi;
const MemMapEntry *memmap;
struct GPEXHost *gpex_host;
OnOffAuto iommu_sys;
};
enum {
@ -84,7 +85,8 @@ enum {
VIRT_PCIE_MMIO,
VIRT_PCIE_PIO,
VIRT_PLATFORM_BUS,
VIRT_PCIE_ECAM
VIRT_PCIE_ECAM,
VIRT_IOMMU_SYS,
};
enum {
@ -93,6 +95,7 @@ enum {
VIRTIO_IRQ = 1, /* 1 to 8 */
VIRTIO_COUNT = 8,
PCIE_IRQ = 0x20, /* 32 to 35 */
IOMMU_SYS_IRQ = 0x24, /* 36-39 */
VIRT_PLATFORM_BUS_IRQ = 64, /* 64 to 95 */
};
@ -129,6 +132,7 @@ enum {
1 + FDT_APLIC_INT_CELLS)
bool virt_is_acpi_enabled(RISCVVirtState *s);
bool virt_is_iommu_sys_enabled(RISCVVirtState *s);
void virt_acpi_setup(RISCVVirtState *vms);
uint32_t imsic_num_bits(uint32_t count);