This creates a default pxb-cxl (bus_nr=0xc0) bridge with two cxl root ports on sbsa-ref. And the memory layout places 64K space for the cxl host bridge register regions(CHBCR) in the sbsa-ref memmap.
In addition, this support indepentent mmio32(32M) & mmio64(1M) space for cxl components.
To provide CFMWs on sbsa-ref, this extends 1TB space from the hole above RAM Memory [SBSA_MEM] for CXL Fixed Memory Window.
Signed-off-by: Yuquan Wang wangyuquan1236@phytium.com.cn --- docs/system/arm/sbsa.rst | 4 ++ hw/arm/sbsa-ref.c | 122 +++++++++++++++++++++++++++++++++++++- hw/cxl/cxl-host-stubs.c | 2 + hw/cxl/cxl-host.c | 2 +- include/hw/cxl/cxl_host.h | 2 + 5 files changed, 130 insertions(+), 2 deletions(-)
diff --git a/docs/system/arm/sbsa.rst b/docs/system/arm/sbsa.rst index 2bf3fc8d59..21b88e88e7 100644 --- a/docs/system/arm/sbsa.rst +++ b/docs/system/arm/sbsa.rst @@ -28,6 +28,7 @@ The ``sbsa-ref`` board supports: - E1000E ethernet card on PCIe bus - Bochs display adapter on PCIe bus - A generic SBSA watchdog device + - CXL host bridge and CXL fixed memory window
Board to firmware interface @@ -92,3 +93,6 @@ Platform version changes:
0.4 CPU topology information is present in devicetree. + +0.5 + CXL host bridge and CXL fixed memory window are supported. diff --git a/hw/arm/sbsa-ref.c b/hw/arm/sbsa-ref.c index e3195d5449..655dc82863 100644 --- a/hw/arm/sbsa-ref.c +++ b/hw/arm/sbsa-ref.c @@ -36,12 +36,18 @@ #include "hw/arm/smmuv3.h" #include "hw/block/flash.h" #include "hw/boards.h" +#include "hw/cxl/cxl.h" +#include "hw/cxl/cxl_host.h" #include "hw/ide/ide-bus.h" #include "hw/ide/ahci-sysbus.h" #include "hw/intc/arm_gicv3_common.h" #include "hw/intc/arm_gicv3_its_common.h" #include "hw/loader.h" +#include "hw/pci/pci_bridge.h" +#include "hw/pci/pci_bus.h" +#include "hw/pci/pcie_port.h" #include "hw/pci-host/gpex.h" +#include "hw/pci-bridge/pci_expander_bridge.h" #include "hw/qdev-properties.h" #include "hw/usb.h" #include "hw/usb/xhci.h" @@ -94,6 +100,10 @@ enum { SBSA_SECURE_MEM, SBSA_AHCI, SBSA_XHCI, + SBSA_CXL_HOST, + SBSA_CXL_MMIO, + SBSA_CXL_MMIO_HIGH, + SBSA_CXL_FIXED_WINDOW, };
struct SBSAMachineState { @@ -105,6 +115,8 @@ struct SBSAMachineState { int psci_conduit; DeviceState *gic; PFlashCFI01 *flash[2]; + CXLState cxl_devices_state; + PCIBus *cxlbus; };
#define TYPE_SBSA_MACHINE MACHINE_TYPE_NAME("sbsa-ref") @@ -132,6 +144,10 @@ static const MemMapEntry sbsa_ref_memmap[] = { /* Space here reserved for more SMMUs */ [SBSA_AHCI] = { 0x60100000, 0x00010000 }, [SBSA_XHCI] = { 0x60110000, 0x00010000 }, + /* 64KiB CXL Host Bridge Registers space */ + [SBSA_CXL_HOST] = { 0x60120000, 0x00010000 }, + /* 32M CXL 32-bit MMIO space */ + [SBSA_CXL_MMIO] = { 0x60130000, 0x02000000 }, /* Space here reserved for other devices */ [SBSA_PCIE_PIO] = { 0x7fff0000, 0x00010000 }, /* 32-bit address PCIE MMIO space */ @@ -141,6 +157,10 @@ static const MemMapEntry sbsa_ref_memmap[] = { /* ~1TB PCIE MMIO space (4GB to 1024GB boundary) */ [SBSA_PCIE_MMIO_HIGH] = { 0x100000000ULL, 0xFF00000000ULL }, [SBSA_MEM] = { 0x10000000000ULL, RAMLIMIT_BYTES }, + /* 1M CXL 64-bit MMIO space */ + [SBSA_CXL_MMIO_HIGH] = { 0x90000000000ULL, 0x00100000 }, + /* 1TB CXL FIXED WINDOW space */ + [SBSA_CXL_FIXED_WINDOW] = { 0xA0000000000ULL, 0x10000000000ULL }, };
static const int sbsa_ref_irqmap[] = { @@ -216,7 +236,7 @@ static void create_fdt(SBSAMachineState *sms) * fw compatibility. */ qemu_fdt_setprop_cell(fdt, "/", "machine-version-major", 0); - qemu_fdt_setprop_cell(fdt, "/", "machine-version-minor", 4); + qemu_fdt_setprop_cell(fdt, "/", "machine-version-minor", 5);
if (ms->numa_state->have_numa_distance) { int size = nb_numa_nodes * nb_numa_nodes * 3 * sizeof(uint32_t); @@ -629,6 +649,35 @@ static void create_smmu(const SBSAMachineState *sms, PCIBus *bus) } }
+static void create_pxb_cxl(SBSAMachineState *sms, PCIBus *bus) +{ + DeviceState *qdev = qdev_new(TYPE_PXB_CXL_DEV); + PCIDevice *dev = PCI_DEVICE(qdev); + CXLHost *host; + PCIHostState *cxl; + PCIDevice *cxlrp; + PCIEPort *p; + PCIESlot *s; + int i; + + sms->cxl_devices_state.is_enabled = true; + qdev_prop_set_uint32(qdev, "bus_nr", 0xc0); + pci_realize_and_unref(dev, bus, &error_fatal); + + host = PXB_CXL_DEV(dev)->cxl_host_bridge; + cxl = PCI_HOST_BRIDGE(host); + sms->cxlbus = cxl->bus; + + for (i = 0; i < 2; i++) { + cxlrp = pci_new(-1, "cxl-rp"); + p = PCIE_PORT(cxlrp); + s = PCIE_SLOT(cxlrp); + p->port = i; + s->slot = i; + pci_realize_and_unref(cxlrp, sms->cxlbus, &error_fatal); + } +} + static void create_pcie(SBSAMachineState *sms) { hwaddr base_ecam = sbsa_ref_memmap[SBSA_PCIE_ECAM].base; @@ -638,6 +687,10 @@ static void create_pcie(SBSAMachineState *sms) hwaddr base_mmio_high = sbsa_ref_memmap[SBSA_PCIE_MMIO_HIGH].base; hwaddr size_mmio_high = sbsa_ref_memmap[SBSA_PCIE_MMIO_HIGH].size; hwaddr base_pio = sbsa_ref_memmap[SBSA_PCIE_PIO].base; + hwaddr cxl_base_mmio = sbsa_ref_memmap[SBSA_CXL_MMIO].base; + hwaddr cxl_size_mmio = sbsa_ref_memmap[SBSA_CXL_MMIO].size; + hwaddr cxl_base_mmio_high = sbsa_ref_memmap[SBSA_CXL_MMIO_HIGH].base; + hwaddr cxl_size_mmio_high = sbsa_ref_memmap[SBSA_CXL_MMIO_HIGH].size; int irq = sbsa_ref_irqmap[SBSA_PCIE]; MachineClass *mc = MACHINE_GET_CLASS(sms); MemoryRegion *mmio_alias, *mmio_alias_high, *mmio_reg; @@ -686,6 +739,67 @@ static void create_pcie(SBSAMachineState *sms) pci_create_simple(pci->bus, -1, "bochs-display");
create_smmu(sms, pci->bus); + + /* Map CXL MMIO space */ + mmio_alias = g_new0(MemoryRegion, 1); + mmio_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1); + memory_region_init_alias(mmio_alias, OBJECT(dev), "cxl-mmio", + mmio_reg, cxl_base_mmio, cxl_size_mmio); + memory_region_add_subregion(get_system_memory(), cxl_base_mmio, mmio_alias); + + /* Map CXL MMIO_HIGH space */ + mmio_alias_high = g_new0(MemoryRegion, 1); + memory_region_init_alias(mmio_alias_high, OBJECT(dev), "cxl-mmio-high", + mmio_reg, cxl_base_mmio_high, cxl_size_mmio_high); + memory_region_add_subregion(get_system_memory(), cxl_base_mmio_high, + mmio_alias_high); + + create_pxb_cxl(sms, pci->bus); +} + +static void create_cxl_host_reg_region(SBSAMachineState *sms) +{ + MemoryRegion *sysmem = get_system_memory(); + MemoryRegion *mr = &sms->cxl_devices_state.host_mr; + + memory_region_init(mr, OBJECT(sms), "cxl_host_reg", + sbsa_ref_memmap[SBSA_CXL_HOST].size); + memory_region_add_subregion(sysmem, sbsa_ref_memmap[SBSA_CXL_HOST].base, mr); +} + +static void create_cxl_fixed_window_region(SBSAMachineState *sms, + MemoryRegion *mem) +{ + char *cxl_host = object_get_canonical_path(OBJECT(sms->cxlbus)); + hwaddr base = sbsa_ref_memmap[SBSA_CXL_FIXED_WINDOW].base; + GList *it; + strList host_target = { NULL, cxl_host }; + CXLFixedMemoryWindowOptions sbsa_ref_cfmwoptions = { + .size = 1 * TiB, + .has_interleave_granularity = false, + .targets = &host_target, + }; + CXLFixedWindow *fw; + + cxl_fixed_memory_window_config(&sms->cxl_devices_state, + &sbsa_ref_cfmwoptions, &error_fatal); + + it = sms->cxl_devices_state.fixed_windows; + fw = it->data; + fw->base = base; + memory_region_init_io(&fw->mr, OBJECT(sms), &cfmws_ops, fw, + "cxl-fixed-memory-region", fw->size); + + memory_region_add_subregion(mem, fw->base, &fw->mr); +} + +static void sbsa_cxl_fmws_link_targets(SBSAMachineState *sms, + Error **errp) +{ + GList *it = sms->cxl_devices_state.fixed_windows; + CXLFixedWindow *fw = it->data; + + fw->target_hbs[0] = PXB_CXL_DEV(pci_bridge_get_device(sms->cxlbus)); }
static void *sbsa_ref_dtb(const struct arm_boot_info *binfo, int *fdt_size) @@ -821,6 +935,12 @@ static void sbsa_ref_init(MachineState *machine)
create_pcie(sms);
+ create_cxl_host_reg_region(sms); + create_cxl_fixed_window_region(sms, sysmem); + pxb_cxl_hook_up_registers(&sms->cxl_devices_state, sms->cxlbus, + &error_fatal); + sbsa_cxl_fmws_link_targets(sms, &error_fatal); + create_secure_ec(secure_sysmem);
sms->bootinfo.ram_size = machine->ram_size; diff --git a/hw/cxl/cxl-host-stubs.c b/hw/cxl/cxl-host-stubs.c index cae4afcdde..aea94933ba 100644 --- a/hw/cxl/cxl-host-stubs.c +++ b/hw/cxl/cxl-host-stubs.c @@ -11,5 +11,7 @@ void cxl_fmws_link_targets(CXLState *stat, Error **errp) {}; void cxl_machine_init(Object *obj, CXLState *state) {}; void cxl_hook_up_pxb_registers(PCIBus *bus, CXLState *state, Error **errp) {}; +void cxl_fixed_memory_window_config(CXLState *cxl_state, + CXLFixedMemoryWindowOptions *object, Error **errp) {};
const MemoryRegionOps cfmws_ops; diff --git a/hw/cxl/cxl-host.c b/hw/cxl/cxl-host.c index e9f2543c43..d408c7db15 100644 --- a/hw/cxl/cxl-host.c +++ b/hw/cxl/cxl-host.c @@ -22,7 +22,7 @@ #include "hw/pci/pcie_port.h" #include "hw/pci-bridge/pci_expander_bridge.h"
-static void cxl_fixed_memory_window_config(CXLState *cxl_state, +void cxl_fixed_memory_window_config(CXLState *cxl_state, CXLFixedMemoryWindowOptions *object, Error **errp) { diff --git a/include/hw/cxl/cxl_host.h b/include/hw/cxl/cxl_host.h index c9bc9c7c50..f3184733aa 100644 --- a/include/hw/cxl/cxl_host.h +++ b/include/hw/cxl/cxl_host.h @@ -16,6 +16,8 @@ void cxl_machine_init(Object *obj, CXLState *state); void cxl_fmws_link_targets(CXLState *stat, Error **errp); void cxl_hook_up_pxb_registers(PCIBus *bus, CXLState *state, Error **errp); +void cxl_fixed_memory_window_config(CXLState *cxl_state, + CXLFixedMemoryWindowOptions *object, Error **errp);
extern const MemoryRegionOps cfmws_ops;