Alex Graf has already made qemu support KVM for the pseries machine when using the Book3S-PR KVM variant (which runs the guest in usermode, emulating supervisor operations). This code allows gets us very close to also working with KVM Book3S-HV (using the hypervisor capabilities of recent POWER CPUs). This patch moves us another step towards Book3S-HV support by correctly handling SMT (multithreaded) POWER CPUs. There are two parts to this: * Querying KVM to check SMT capability, and if present, adjusting the cpu numbers that qemu assigns to cause KVM to assign guest threads to cores in the right way (this isn't automatic, because the POWER HV support has a limitation that different threads on a single core cannot be in different guests at the same time). * Correctly informing the guest OS of the SMT thread to core mappings via the device tree. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
535 lines
17 KiB
C
535 lines
17 KiB
C
/*
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* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
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*
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* Copyright (c) 2004-2007 Fabrice Bellard
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* Copyright (c) 2007 Jocelyn Mayer
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* Copyright (c) 2010 David Gibson, IBM Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include "sysemu.h"
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#include "hw.h"
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#include "elf.h"
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#include "net.h"
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#include "blockdev.h"
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#include "cpus.h"
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#include "kvm.h"
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#include "kvm_ppc.h"
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#include "hw/boards.h"
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#include "hw/ppc.h"
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#include "hw/loader.h"
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#include "hw/spapr.h"
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#include "hw/spapr_vio.h"
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#include "hw/xics.h"
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#include "kvm.h"
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#include "kvm_ppc.h"
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#include "exec-memory.h"
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#include <libfdt.h>
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#define KERNEL_LOAD_ADDR 0x00000000
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#define INITRD_LOAD_ADDR 0x02800000
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#define FDT_MAX_SIZE 0x10000
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#define RTAS_MAX_SIZE 0x10000
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#define FW_MAX_SIZE 0x400000
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#define FW_FILE_NAME "slof.bin"
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#define MIN_RAM_SLOF 512UL
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#define TIMEBASE_FREQ 512000000ULL
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#define MAX_CPUS 256
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#define XICS_IRQS 1024
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#define PHANDLE_XICP 0x00001111
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sPAPREnvironment *spapr;
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qemu_irq spapr_allocate_irq(uint32_t hint, uint32_t *irq_num)
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{
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uint32_t irq;
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qemu_irq qirq;
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if (hint) {
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irq = hint;
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/* FIXME: we should probably check for collisions somehow */
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} else {
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irq = spapr->next_irq++;
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}
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qirq = xics_find_qirq(spapr->icp, irq);
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if (!qirq) {
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return NULL;
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}
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if (irq_num) {
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*irq_num = irq;
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}
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return qirq;
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}
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static void *spapr_create_fdt_skel(const char *cpu_model,
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target_phys_addr_t initrd_base,
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target_phys_addr_t initrd_size,
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const char *boot_device,
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const char *kernel_cmdline,
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long hash_shift)
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{
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void *fdt;
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CPUState *env;
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uint64_t mem_reg_property[] = { 0, cpu_to_be64(ram_size) };
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uint32_t start_prop = cpu_to_be32(initrd_base);
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uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size);
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uint32_t pft_size_prop[] = {0, cpu_to_be32(hash_shift)};
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char hypertas_prop[] = "hcall-pft\0hcall-term\0hcall-dabr\0hcall-interrupt"
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"\0hcall-tce\0hcall-vio\0hcall-splpar\0hcall-bulk";
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uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};
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int i;
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char *modelname;
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int smt = kvmppc_smt_threads();
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#define _FDT(exp) \
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do { \
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int ret = (exp); \
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if (ret < 0) { \
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fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
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#exp, fdt_strerror(ret)); \
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exit(1); \
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} \
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} while (0)
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fdt = g_malloc0(FDT_MAX_SIZE);
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_FDT((fdt_create(fdt, FDT_MAX_SIZE)));
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_FDT((fdt_finish_reservemap(fdt)));
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/* Root node */
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_FDT((fdt_begin_node(fdt, "")));
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_FDT((fdt_property_string(fdt, "device_type", "chrp")));
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_FDT((fdt_property_string(fdt, "model", "IBM pSeries (emulated by qemu)")));
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_FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
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_FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
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/* /chosen */
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_FDT((fdt_begin_node(fdt, "chosen")));
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_FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
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_FDT((fdt_property(fdt, "linux,initrd-start",
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&start_prop, sizeof(start_prop))));
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_FDT((fdt_property(fdt, "linux,initrd-end",
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&end_prop, sizeof(end_prop))));
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_FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
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_FDT((fdt_end_node(fdt)));
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/* memory node */
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_FDT((fdt_begin_node(fdt, "memory@0")));
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_FDT((fdt_property_string(fdt, "device_type", "memory")));
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_FDT((fdt_property(fdt, "reg",
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mem_reg_property, sizeof(mem_reg_property))));
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_FDT((fdt_end_node(fdt)));
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/* cpus */
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_FDT((fdt_begin_node(fdt, "cpus")));
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_FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
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_FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
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modelname = g_strdup(cpu_model);
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for (i = 0; i < strlen(modelname); i++) {
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modelname[i] = toupper(modelname[i]);
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}
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for (env = first_cpu; env != NULL; env = env->next_cpu) {
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int index = env->cpu_index;
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uint32_t servers_prop[smp_threads];
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uint32_t gservers_prop[smp_threads * 2];
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char *nodename;
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uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
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0xffffffff, 0xffffffff};
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uint32_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq() : TIMEBASE_FREQ;
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uint32_t cpufreq = kvm_enabled() ? kvmppc_get_clockfreq() : 1000000000;
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if ((index % smt) != 0) {
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continue;
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}
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if (asprintf(&nodename, "%s@%x", modelname, index) < 0) {
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fprintf(stderr, "Allocation failure\n");
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exit(1);
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}
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_FDT((fdt_begin_node(fdt, nodename)));
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free(nodename);
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_FDT((fdt_property_cell(fdt, "reg", index)));
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_FDT((fdt_property_string(fdt, "device_type", "cpu")));
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_FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
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_FDT((fdt_property_cell(fdt, "dcache-block-size",
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env->dcache_line_size)));
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_FDT((fdt_property_cell(fdt, "icache-block-size",
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env->icache_line_size)));
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_FDT((fdt_property_cell(fdt, "timebase-frequency", tbfreq)));
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_FDT((fdt_property_cell(fdt, "clock-frequency", cpufreq)));
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_FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
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_FDT((fdt_property(fdt, "ibm,pft-size",
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pft_size_prop, sizeof(pft_size_prop))));
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_FDT((fdt_property_string(fdt, "status", "okay")));
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_FDT((fdt_property(fdt, "64-bit", NULL, 0)));
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/* Build interrupt servers and gservers properties */
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for (i = 0; i < smp_threads; i++) {
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servers_prop[i] = cpu_to_be32(index + i);
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/* Hack, direct the group queues back to cpu 0 */
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gservers_prop[i*2] = cpu_to_be32(index + i);
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gservers_prop[i*2 + 1] = 0;
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}
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_FDT((fdt_property(fdt, "ibm,ppc-interrupt-server#s",
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servers_prop, sizeof(servers_prop))));
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_FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
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gservers_prop, sizeof(gservers_prop))));
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if (env->mmu_model & POWERPC_MMU_1TSEG) {
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_FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
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segs, sizeof(segs))));
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}
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_FDT((fdt_end_node(fdt)));
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}
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g_free(modelname);
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_FDT((fdt_end_node(fdt)));
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/* RTAS */
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_FDT((fdt_begin_node(fdt, "rtas")));
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_FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
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sizeof(hypertas_prop))));
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_FDT((fdt_end_node(fdt)));
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/* interrupt controller */
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_FDT((fdt_begin_node(fdt, "interrupt-controller")));
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_FDT((fdt_property_string(fdt, "device_type",
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"PowerPC-External-Interrupt-Presentation")));
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_FDT((fdt_property_string(fdt, "compatible", "IBM,ppc-xicp")));
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_FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
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_FDT((fdt_property(fdt, "ibm,interrupt-server-ranges",
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interrupt_server_ranges_prop,
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sizeof(interrupt_server_ranges_prop))));
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_FDT((fdt_property_cell(fdt, "#interrupt-cells", 2)));
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_FDT((fdt_property_cell(fdt, "linux,phandle", PHANDLE_XICP)));
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_FDT((fdt_property_cell(fdt, "phandle", PHANDLE_XICP)));
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_FDT((fdt_end_node(fdt)));
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/* vdevice */
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_FDT((fdt_begin_node(fdt, "vdevice")));
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_FDT((fdt_property_string(fdt, "device_type", "vdevice")));
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_FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
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_FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
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_FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
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_FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
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_FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
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_FDT((fdt_end_node(fdt)));
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_FDT((fdt_end_node(fdt))); /* close root node */
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_FDT((fdt_finish(fdt)));
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return fdt;
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}
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static void spapr_finalize_fdt(sPAPREnvironment *spapr,
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target_phys_addr_t fdt_addr,
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target_phys_addr_t rtas_addr,
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target_phys_addr_t rtas_size)
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{
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int ret;
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void *fdt;
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fdt = g_malloc(FDT_MAX_SIZE);
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/* open out the base tree into a temp buffer for the final tweaks */
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_FDT((fdt_open_into(spapr->fdt_skel, fdt, FDT_MAX_SIZE)));
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ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
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if (ret < 0) {
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fprintf(stderr, "couldn't setup vio devices in fdt\n");
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exit(1);
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}
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/* RTAS */
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ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
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if (ret < 0) {
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fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
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}
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_FDT((fdt_pack(fdt)));
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cpu_physical_memory_write(fdt_addr, fdt, fdt_totalsize(fdt));
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g_free(fdt);
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}
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static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
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{
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return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
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}
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static void emulate_spapr_hypercall(CPUState *env)
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{
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env->gpr[3] = spapr_hypercall(env, env->gpr[3], &env->gpr[4]);
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}
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static void spapr_reset(void *opaque)
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{
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sPAPREnvironment *spapr = (sPAPREnvironment *)opaque;
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fprintf(stderr, "sPAPR reset\n");
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/* flush out the hash table */
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memset(spapr->htab, 0, spapr->htab_size);
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/* Load the fdt */
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spapr_finalize_fdt(spapr, spapr->fdt_addr, spapr->rtas_addr,
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spapr->rtas_size);
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/* Set up the entry state */
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first_cpu->gpr[3] = spapr->fdt_addr;
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first_cpu->gpr[5] = 0;
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first_cpu->halted = 0;
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first_cpu->nip = spapr->entry_point;
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}
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/* pSeries LPAR / sPAPR hardware init */
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static void ppc_spapr_init(ram_addr_t ram_size,
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const char *boot_device,
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const char *kernel_filename,
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const char *kernel_cmdline,
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const char *initrd_filename,
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const char *cpu_model)
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{
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CPUState *env;
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int i;
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MemoryRegion *sysmem = get_system_memory();
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MemoryRegion *ram = g_new(MemoryRegion, 1);
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uint32_t initrd_base;
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long kernel_size, initrd_size, fw_size;
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long pteg_shift = 17;
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char *filename;
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spapr = g_malloc(sizeof(*spapr));
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cpu_ppc_hypercall = emulate_spapr_hypercall;
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/* We place the device tree just below either the top of RAM, or
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* 2GB, so that it can be processed with 32-bit code if
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* necessary */
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spapr->fdt_addr = MIN(ram_size, 0x80000000) - FDT_MAX_SIZE;
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spapr->rtas_addr = spapr->fdt_addr - RTAS_MAX_SIZE;
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/* init CPUs */
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if (cpu_model == NULL) {
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cpu_model = "POWER7";
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}
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for (i = 0; i < smp_cpus; i++) {
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env = cpu_init(cpu_model);
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if (!env) {
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fprintf(stderr, "Unable to find PowerPC CPU definition\n");
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exit(1);
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}
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/* Set time-base frequency to 512 MHz */
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cpu_ppc_tb_init(env, TIMEBASE_FREQ);
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qemu_register_reset((QEMUResetHandler *)&cpu_reset, env);
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env->hreset_vector = 0x60;
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env->hreset_excp_prefix = 0;
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env->gpr[3] = env->cpu_index;
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}
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/* allocate RAM */
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spapr->ram_limit = ram_size;
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memory_region_init_ram(ram, NULL, "ppc_spapr.ram", spapr->ram_limit);
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memory_region_add_subregion(sysmem, 0, ram);
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/* allocate hash page table. For now we always make this 16mb,
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* later we should probably make it scale to the size of guest
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* RAM */
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spapr->htab_size = 1ULL << (pteg_shift + 7);
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spapr->htab = qemu_memalign(spapr->htab_size, spapr->htab_size);
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for (env = first_cpu; env != NULL; env = env->next_cpu) {
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env->external_htab = spapr->htab;
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env->htab_base = -1;
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env->htab_mask = spapr->htab_size - 1;
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/* Tell KVM that we're in PAPR mode */
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env->spr[SPR_SDR1] = (unsigned long)spapr->htab |
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((pteg_shift + 7) - 18);
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env->spr[SPR_HIOR] = 0;
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if (kvm_enabled()) {
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kvmppc_set_papr(env);
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}
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}
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filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
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spapr->rtas_size = load_image_targphys(filename, spapr->rtas_addr,
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ram_size - spapr->rtas_addr);
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if (spapr->rtas_size < 0) {
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hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
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exit(1);
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}
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g_free(filename);
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/* Set up Interrupt Controller */
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spapr->icp = xics_system_init(XICS_IRQS);
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spapr->next_irq = 16;
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/* Set up VIO bus */
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spapr->vio_bus = spapr_vio_bus_init();
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for (i = 0; i < MAX_SERIAL_PORTS; i++) {
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if (serial_hds[i]) {
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spapr_vty_create(spapr->vio_bus, SPAPR_VTY_BASE_ADDRESS + i,
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serial_hds[i]);
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}
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}
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for (i = 0; i < nb_nics; i++) {
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NICInfo *nd = &nd_table[i];
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if (!nd->model) {
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nd->model = g_strdup("ibmveth");
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}
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if (strcmp(nd->model, "ibmveth") == 0) {
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spapr_vlan_create(spapr->vio_bus, 0x1000 + i, nd);
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} else {
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fprintf(stderr, "pSeries (sPAPR) platform does not support "
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"NIC model '%s' (only ibmveth is supported)\n",
|
|
nd->model);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i <= drive_get_max_bus(IF_SCSI); i++) {
|
|
spapr_vscsi_create(spapr->vio_bus, 0x2000 + i);
|
|
}
|
|
|
|
if (kernel_filename) {
|
|
uint64_t lowaddr = 0;
|
|
|
|
kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
|
|
NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0);
|
|
if (kernel_size < 0) {
|
|
kernel_size = load_image_targphys(kernel_filename,
|
|
KERNEL_LOAD_ADDR,
|
|
ram_size - KERNEL_LOAD_ADDR);
|
|
}
|
|
if (kernel_size < 0) {
|
|
fprintf(stderr, "qemu: could not load kernel '%s'\n",
|
|
kernel_filename);
|
|
exit(1);
|
|
}
|
|
|
|
/* load initrd */
|
|
if (initrd_filename) {
|
|
initrd_base = INITRD_LOAD_ADDR;
|
|
initrd_size = load_image_targphys(initrd_filename, initrd_base,
|
|
ram_size - initrd_base);
|
|
if (initrd_size < 0) {
|
|
fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
|
|
initrd_filename);
|
|
exit(1);
|
|
}
|
|
} else {
|
|
initrd_base = 0;
|
|
initrd_size = 0;
|
|
}
|
|
|
|
spapr->entry_point = KERNEL_LOAD_ADDR;
|
|
} else {
|
|
if (ram_size < (MIN_RAM_SLOF << 20)) {
|
|
fprintf(stderr, "qemu: pSeries SLOF firmware requires >= "
|
|
"%ldM guest RAM\n", MIN_RAM_SLOF);
|
|
exit(1);
|
|
}
|
|
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, FW_FILE_NAME);
|
|
fw_size = load_image_targphys(filename, 0, FW_MAX_SIZE);
|
|
if (fw_size < 0) {
|
|
hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
|
|
exit(1);
|
|
}
|
|
g_free(filename);
|
|
spapr->entry_point = 0x100;
|
|
initrd_base = 0;
|
|
initrd_size = 0;
|
|
|
|
/* SLOF will startup the secondary CPUs using RTAS,
|
|
rather than expecting a kexec() style entry */
|
|
for (env = first_cpu; env != NULL; env = env->next_cpu) {
|
|
env->halted = 1;
|
|
}
|
|
}
|
|
|
|
/* Prepare the device tree */
|
|
spapr->fdt_skel = spapr_create_fdt_skel(cpu_model,
|
|
initrd_base, initrd_size,
|
|
boot_device, kernel_cmdline,
|
|
pteg_shift + 7);
|
|
assert(spapr->fdt_skel != NULL);
|
|
|
|
qemu_register_reset(spapr_reset, spapr);
|
|
}
|
|
|
|
static QEMUMachine spapr_machine = {
|
|
.name = "pseries",
|
|
.desc = "pSeries Logical Partition (PAPR compliant)",
|
|
.init = ppc_spapr_init,
|
|
.max_cpus = MAX_CPUS,
|
|
.no_vga = 1,
|
|
.no_parallel = 1,
|
|
.use_scsi = 1,
|
|
};
|
|
|
|
static void spapr_machine_init(void)
|
|
{
|
|
qemu_register_machine(&spapr_machine);
|
|
}
|
|
|
|
machine_init(spapr_machine_init);
|