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qemu/hw/spapr.c
David Gibson 382be75df7 pseries: Set hash table size based on RAM size 
Currently the pseries machine code always attempts to set the size of the
guests's hash page table to 16MB.  However, because of the way the POWER
MMU works, a suitable hash page table size should really depend on memory
size.  16MB will be excessive for guests with <1GB and RAM, and may not be
enough for guests with >2GB of RAM (depending on guest page size and
other factors).

The usual given rule of thumb is that the hash table should be 1/64 of
the size of memory, but in fact the Linux guests we are aiming at don't
really need that much.  This patch, therefore, changes the hash table
allocation code to aim for 1/128 of the size of RAM (rounding up).  When
using KVM, this size may still be adjusted by the host kernel if it is
unable to allocate a suitable (contiguous) table.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-04 15:54:18 +02:00

923 lines
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/*
* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
*
* Copyright (c) 2004-2007 Fabrice Bellard
* Copyright (c) 2007 Jocelyn Mayer
* Copyright (c) 2010 David Gibson, IBM Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "sysemu.h"
#include "hw.h"
#include "elf.h"
#include "net.h"
#include "blockdev.h"
#include "cpus.h"
#include "kvm.h"
#include "kvm_ppc.h"
#include "hw/boards.h"
#include "hw/ppc.h"
#include "hw/loader.h"
#include "hw/spapr.h"
#include "hw/spapr_vio.h"
#include "hw/spapr_pci.h"
#include "hw/xics.h"
#include "hw/msi.h"
#include "kvm.h"
#include "kvm_ppc.h"
#include "pci.h"
#include "vga-pci.h"
#include "exec-memory.h"
#include "hw/usb.h"
#include <libfdt.h>
/* SLOF memory layout:
*
* SLOF raw image loaded at 0, copies its romfs right below the flat
* device-tree, then position SLOF itself 31M below that
*
* So we set FW_OVERHEAD to 40MB which should account for all of that
* and more
*
* We load our kernel at 4M, leaving space for SLOF initial image
*/
#define FDT_MAX_SIZE 0x10000
#define RTAS_MAX_SIZE 0x10000
#define FW_MAX_SIZE 0x400000
#define FW_FILE_NAME "slof.bin"
#define FW_OVERHEAD 0x2800000
#define KERNEL_LOAD_ADDR FW_MAX_SIZE
#define MIN_RMA_SLOF 128UL
#define TIMEBASE_FREQ 512000000ULL
#define MAX_CPUS 256
#define XICS_IRQS 1024
#define SPAPR_PCI_BUID 0x800000020000001ULL
#define SPAPR_PCI_MEM_WIN_ADDR (0x10000000000ULL + 0xA0000000)
#define SPAPR_PCI_MEM_WIN_SIZE 0x20000000
#define SPAPR_PCI_IO_WIN_ADDR (0x10000000000ULL + 0x80000000)
#define SPAPR_PCI_MSI_WIN_ADDR (0x10000000000ULL + 0x90000000)
#define PHANDLE_XICP 0x00001111
#define HTAB_SIZE(spapr) (1ULL << ((spapr)->htab_shift))
sPAPREnvironment *spapr;
int spapr_allocate_irq(int hint, bool lsi)
{
int irq;
if (hint) {
irq = hint;
/* FIXME: we should probably check for collisions somehow */
} else {
irq = spapr->next_irq++;
}
/* Configure irq type */
if (!xics_get_qirq(spapr->icp, irq)) {
return 0;
}
xics_set_irq_type(spapr->icp, irq, lsi);
return irq;
}
/* Allocate block of consequtive IRQs, returns a number of the first */
int spapr_allocate_irq_block(int num, bool lsi)
{
int first = -1;
int i;
for (i = 0; i < num; ++i) {
int irq;
irq = spapr_allocate_irq(0, lsi);
if (!irq) {
return -1;
}
if (0 == i) {
first = irq;
}
/* If the above doesn't create a consecutive block then that's
* an internal bug */
assert(irq == (first + i));
}
return first;
}
static int spapr_fixup_cpu_dt(void *fdt, sPAPREnvironment *spapr)
{
int ret = 0, offset;
CPUPPCState *env;
char cpu_model[32];
int smt = kvmppc_smt_threads();
uint32_t pft_size_prop[] = {0, cpu_to_be32(spapr->htab_shift)};
assert(spapr->cpu_model);
for (env = first_cpu; env != NULL; env = env->next_cpu) {
uint32_t associativity[] = {cpu_to_be32(0x5),
cpu_to_be32(0x0),
cpu_to_be32(0x0),
cpu_to_be32(0x0),
cpu_to_be32(env->numa_node),
cpu_to_be32(env->cpu_index)};
if ((env->cpu_index % smt) != 0) {
continue;
}
snprintf(cpu_model, 32, "/cpus/%s@%x", spapr->cpu_model,
env->cpu_index);
offset = fdt_path_offset(fdt, cpu_model);
if (offset < 0) {
return offset;
}
if (nb_numa_nodes > 1) {
ret = fdt_setprop(fdt, offset, "ibm,associativity", associativity,
sizeof(associativity));
if (ret < 0) {
return ret;
}
}
ret = fdt_setprop(fdt, offset, "ibm,pft-size",
pft_size_prop, sizeof(pft_size_prop));
if (ret < 0) {
return ret;
}
}
return ret;
}
static size_t create_page_sizes_prop(CPUPPCState *env, uint32_t *prop,
size_t maxsize)
{
size_t maxcells = maxsize / sizeof(uint32_t);
int i, j, count;
uint32_t *p = prop;
for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) {
struct ppc_one_seg_page_size *sps = &env->sps.sps[i];
if (!sps->page_shift) {
break;
}
for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) {
if (sps->enc[count].page_shift == 0) {
break;
}
}
if ((p - prop) >= (maxcells - 3 - count * 2)) {
break;
}
*(p++) = cpu_to_be32(sps->page_shift);
*(p++) = cpu_to_be32(sps->slb_enc);
*(p++) = cpu_to_be32(count);
for (j = 0; j < count; j++) {
*(p++) = cpu_to_be32(sps->enc[j].page_shift);
*(p++) = cpu_to_be32(sps->enc[j].pte_enc);
}
}
return (p - prop) * sizeof(uint32_t);
}
#define _FDT(exp) \
do { \
int ret = (exp); \
if (ret < 0) { \
fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
#exp, fdt_strerror(ret)); \
exit(1); \
} \
} while (0)
static void *spapr_create_fdt_skel(const char *cpu_model,
target_phys_addr_t initrd_base,
target_phys_addr_t initrd_size,
target_phys_addr_t kernel_size,
const char *boot_device,
const char *kernel_cmdline)
{
void *fdt;
CPUPPCState *env;
uint32_t start_prop = cpu_to_be32(initrd_base);
uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size);
char hypertas_prop[] = "hcall-pft\0hcall-term\0hcall-dabr\0hcall-interrupt"
"\0hcall-tce\0hcall-vio\0hcall-splpar\0hcall-bulk";
char qemu_hypertas_prop[] = "hcall-memop1";
uint32_t refpoints[] = {cpu_to_be32(0x4), cpu_to_be32(0x4)};
uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};
char *modelname;
int i, smt = kvmppc_smt_threads();
unsigned char vec5[] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x80};
fdt = g_malloc0(FDT_MAX_SIZE);
_FDT((fdt_create(fdt, FDT_MAX_SIZE)));
if (kernel_size) {
_FDT((fdt_add_reservemap_entry(fdt, KERNEL_LOAD_ADDR, kernel_size)));
}
if (initrd_size) {
_FDT((fdt_add_reservemap_entry(fdt, initrd_base, initrd_size)));
}
_FDT((fdt_finish_reservemap(fdt)));
/* Root node */
_FDT((fdt_begin_node(fdt, "")));
_FDT((fdt_property_string(fdt, "device_type", "chrp")));
_FDT((fdt_property_string(fdt, "model", "IBM pSeries (emulated by qemu)")));
_FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
_FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
/* /chosen */
_FDT((fdt_begin_node(fdt, "chosen")));
/* Set Form1_affinity */
_FDT((fdt_property(fdt, "ibm,architecture-vec-5", vec5, sizeof(vec5))));
_FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
_FDT((fdt_property(fdt, "linux,initrd-start",
&start_prop, sizeof(start_prop))));
_FDT((fdt_property(fdt, "linux,initrd-end",
&end_prop, sizeof(end_prop))));
if (kernel_size) {
uint64_t kprop[2] = { cpu_to_be64(KERNEL_LOAD_ADDR),
cpu_to_be64(kernel_size) };
_FDT((fdt_property(fdt, "qemu,boot-kernel", &kprop, sizeof(kprop))));
}
_FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
_FDT((fdt_property_cell(fdt, "qemu,graphic-width", graphic_width)));
_FDT((fdt_property_cell(fdt, "qemu,graphic-height", graphic_height)));
_FDT((fdt_property_cell(fdt, "qemu,graphic-depth", graphic_depth)));
_FDT((fdt_end_node(fdt)));
/* cpus */
_FDT((fdt_begin_node(fdt, "cpus")));
_FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
_FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
modelname = g_strdup(cpu_model);
for (i = 0; i < strlen(modelname); i++) {
modelname[i] = toupper(modelname[i]);
}
/* This is needed during FDT finalization */
spapr->cpu_model = g_strdup(modelname);
for (env = first_cpu; env != NULL; env = env->next_cpu) {
int index = env->cpu_index;
uint32_t servers_prop[smp_threads];
uint32_t gservers_prop[smp_threads * 2];
char *nodename;
uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
0xffffffff, 0xffffffff};
uint32_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq() : TIMEBASE_FREQ;
uint32_t cpufreq = kvm_enabled() ? kvmppc_get_clockfreq() : 1000000000;
uint32_t page_sizes_prop[64];
size_t page_sizes_prop_size;
if ((index % smt) != 0) {
continue;
}
if (asprintf(&nodename, "%s@%x", modelname, index) < 0) {
fprintf(stderr, "Allocation failure\n");
exit(1);
}
_FDT((fdt_begin_node(fdt, nodename)));
free(nodename);
_FDT((fdt_property_cell(fdt, "reg", index)));
_FDT((fdt_property_string(fdt, "device_type", "cpu")));
_FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
_FDT((fdt_property_cell(fdt, "dcache-block-size",
env->dcache_line_size)));
_FDT((fdt_property_cell(fdt, "icache-block-size",
env->icache_line_size)));
_FDT((fdt_property_cell(fdt, "timebase-frequency", tbfreq)));
_FDT((fdt_property_cell(fdt, "clock-frequency", cpufreq)));
_FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
_FDT((fdt_property_string(fdt, "status", "okay")));
_FDT((fdt_property(fdt, "64-bit", NULL, 0)));
/* Build interrupt servers and gservers properties */
for (i = 0; i < smp_threads; i++) {
servers_prop[i] = cpu_to_be32(index + i);
/* Hack, direct the group queues back to cpu 0 */
gservers_prop[i*2] = cpu_to_be32(index + i);
gservers_prop[i*2 + 1] = 0;
}
_FDT((fdt_property(fdt, "ibm,ppc-interrupt-server#s",
servers_prop, sizeof(servers_prop))));
_FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
gservers_prop, sizeof(gservers_prop))));
if (env->mmu_model & POWERPC_MMU_1TSEG) {
_FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
segs, sizeof(segs))));
}
/* Advertise VMX/VSX (vector extensions) if available
* 0 / no property == no vector extensions
* 1 == VMX / Altivec available
* 2 == VSX available */
if (env->insns_flags & PPC_ALTIVEC) {
uint32_t vmx = (env->insns_flags2 & PPC2_VSX) ? 2 : 1;
_FDT((fdt_property_cell(fdt, "ibm,vmx", vmx)));
}
/* Advertise DFP (Decimal Floating Point) if available
* 0 / no property == no DFP
* 1 == DFP available */
if (env->insns_flags2 & PPC2_DFP) {
_FDT((fdt_property_cell(fdt, "ibm,dfp", 1)));
}
page_sizes_prop_size = create_page_sizes_prop(env, page_sizes_prop,
sizeof(page_sizes_prop));
if (page_sizes_prop_size) {
_FDT((fdt_property(fdt, "ibm,segment-page-sizes",
page_sizes_prop, page_sizes_prop_size)));
}
_FDT((fdt_end_node(fdt)));
}
g_free(modelname);
_FDT((fdt_end_node(fdt)));
/* RTAS */
_FDT((fdt_begin_node(fdt, "rtas")));
_FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
sizeof(hypertas_prop))));
_FDT((fdt_property(fdt, "qemu,hypertas-functions", qemu_hypertas_prop,
sizeof(qemu_hypertas_prop))));
_FDT((fdt_property(fdt, "ibm,associativity-reference-points",
refpoints, sizeof(refpoints))));
_FDT((fdt_end_node(fdt)));
/* interrupt controller */
_FDT((fdt_begin_node(fdt, "interrupt-controller")));
_FDT((fdt_property_string(fdt, "device_type",
"PowerPC-External-Interrupt-Presentation")));
_FDT((fdt_property_string(fdt, "compatible", "IBM,ppc-xicp")));
_FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
_FDT((fdt_property(fdt, "ibm,interrupt-server-ranges",
interrupt_server_ranges_prop,
sizeof(interrupt_server_ranges_prop))));
_FDT((fdt_property_cell(fdt, "#interrupt-cells", 2)));
_FDT((fdt_property_cell(fdt, "linux,phandle", PHANDLE_XICP)));
_FDT((fdt_property_cell(fdt, "phandle", PHANDLE_XICP)));
_FDT((fdt_end_node(fdt)));
/* vdevice */
_FDT((fdt_begin_node(fdt, "vdevice")));
_FDT((fdt_property_string(fdt, "device_type", "vdevice")));
_FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
_FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
_FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
_FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
_FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
_FDT((fdt_end_node(fdt)));
_FDT((fdt_end_node(fdt))); /* close root node */
_FDT((fdt_finish(fdt)));
return fdt;
}
static int spapr_populate_memory(sPAPREnvironment *spapr, void *fdt)
{
uint32_t associativity[] = {cpu_to_be32(0x4), cpu_to_be32(0x0),
cpu_to_be32(0x0), cpu_to_be32(0x0),
cpu_to_be32(0x0)};
char mem_name[32];
target_phys_addr_t node0_size, mem_start;
uint64_t mem_reg_property[2];
int i, off;
/* memory node(s) */
node0_size = (nb_numa_nodes > 1) ? node_mem[0] : ram_size;
if (spapr->rma_size > node0_size) {
spapr->rma_size = node0_size;
}
/* RMA */
mem_reg_property[0] = 0;
mem_reg_property[1] = cpu_to_be64(spapr->rma_size);
off = fdt_add_subnode(fdt, 0, "memory@0");
_FDT(off);
_FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
_FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
sizeof(mem_reg_property))));
_FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
sizeof(associativity))));
/* RAM: Node 0 */
if (node0_size > spapr->rma_size) {
mem_reg_property[0] = cpu_to_be64(spapr->rma_size);
mem_reg_property[1] = cpu_to_be64(node0_size - spapr->rma_size);
sprintf(mem_name, "memory@" TARGET_FMT_lx, spapr->rma_size);
off = fdt_add_subnode(fdt, 0, mem_name);
_FDT(off);
_FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
_FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
sizeof(mem_reg_property))));
_FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
sizeof(associativity))));
}
/* RAM: Node 1 and beyond */
mem_start = node0_size;
for (i = 1; i < nb_numa_nodes; i++) {
mem_reg_property[0] = cpu_to_be64(mem_start);
mem_reg_property[1] = cpu_to_be64(node_mem[i]);
associativity[3] = associativity[4] = cpu_to_be32(i);
sprintf(mem_name, "memory@" TARGET_FMT_lx, mem_start);
off = fdt_add_subnode(fdt, 0, mem_name);
_FDT(off);
_FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
_FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
sizeof(mem_reg_property))));
_FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
sizeof(associativity))));
mem_start += node_mem[i];
}
return 0;
}
static void spapr_finalize_fdt(sPAPREnvironment *spapr,
target_phys_addr_t fdt_addr,
target_phys_addr_t rtas_addr,
target_phys_addr_t rtas_size)
{
int ret;
void *fdt;
sPAPRPHBState *phb;
fdt = g_malloc(FDT_MAX_SIZE);
/* open out the base tree into a temp buffer for the final tweaks */
_FDT((fdt_open_into(spapr->fdt_skel, fdt, FDT_MAX_SIZE)));
ret = spapr_populate_memory(spapr, fdt);
if (ret < 0) {
fprintf(stderr, "couldn't setup memory nodes in fdt\n");
exit(1);
}
ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
if (ret < 0) {
fprintf(stderr, "couldn't setup vio devices in fdt\n");
exit(1);
}
QLIST_FOREACH(phb, &spapr->phbs, list) {
ret = spapr_populate_pci_dt(phb, PHANDLE_XICP, fdt);
}
if (ret < 0) {
fprintf(stderr, "couldn't setup PCI devices in fdt\n");
exit(1);
}
/* RTAS */
ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
if (ret < 0) {
fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
}
/* Advertise NUMA via ibm,associativity */
ret = spapr_fixup_cpu_dt(fdt, spapr);
if (ret < 0) {
fprintf(stderr, "Couldn't finalize CPU device tree properties\n");
}
if (!spapr->has_graphics) {
spapr_populate_chosen_stdout(fdt, spapr->vio_bus);
}
_FDT((fdt_pack(fdt)));
if (fdt_totalsize(fdt) > FDT_MAX_SIZE) {
hw_error("FDT too big ! 0x%x bytes (max is 0x%x)\n",
fdt_totalsize(fdt), FDT_MAX_SIZE);
exit(1);
}
cpu_physical_memory_write(fdt_addr, fdt, fdt_totalsize(fdt));
g_free(fdt);
}
static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
{
return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
}
static void emulate_spapr_hypercall(CPUPPCState *env)
{
env->gpr[3] = spapr_hypercall(env, env->gpr[3], &env->gpr[4]);
}
static void spapr_reset_htab(sPAPREnvironment *spapr)
{
long shift;
/* allocate hash page table. For now we always make this 16mb,
* later we should probably make it scale to the size of guest
* RAM */
shift = kvmppc_reset_htab(spapr->htab_shift);
if (shift > 0) {
/* Kernel handles htab, we don't need to allocate one */
spapr->htab_shift = shift;
} else {
if (!spapr->htab) {
/* Allocate an htab if we don't yet have one */
spapr->htab = qemu_memalign(HTAB_SIZE(spapr), HTAB_SIZE(spapr));
}
/* And clear it */
memset(spapr->htab, 0, HTAB_SIZE(spapr));
}
/* Update the RMA size if necessary */
if (spapr->vrma_adjust) {
spapr->rma_size = kvmppc_rma_size(ram_size, spapr->htab_shift);
}
}
static void ppc_spapr_reset(void)
{
/* Reset the hash table & recalc the RMA */
spapr_reset_htab(spapr);
qemu_devices_reset();
/* Load the fdt */
spapr_finalize_fdt(spapr, spapr->fdt_addr, spapr->rtas_addr,
spapr->rtas_size);
/* Set up the entry state */
first_cpu->gpr[3] = spapr->fdt_addr;
first_cpu->gpr[5] = 0;
first_cpu->halted = 0;
first_cpu->nip = spapr->entry_point;
}
static void spapr_cpu_reset(void *opaque)
{
PowerPCCPU *cpu = opaque;
CPUPPCState *env = &cpu->env;
cpu_reset(CPU(cpu));
/* All CPUs start halted. CPU0 is unhalted from the machine level
* reset code and the rest are explicitly started up by the guest
* using an RTAS call */
env->halted = 1;
env->spr[SPR_HIOR] = 0;
env->external_htab = spapr->htab;
env->htab_base = -1;
env->htab_mask = HTAB_SIZE(spapr) - 1;
env->spr[SPR_SDR1] = (unsigned long)spapr->htab |
(spapr->htab_shift - 18);
}
/* Returns whether we want to use VGA or not */
static int spapr_vga_init(PCIBus *pci_bus)
{
switch (vga_interface_type) {
case VGA_STD:
pci_vga_init(pci_bus);
return 1;
case VGA_NONE:
return 0;
default:
fprintf(stderr, "This vga model is not supported,"
"currently it only supports -vga std\n");
exit(0);
break;
}
}
/* pSeries LPAR / sPAPR hardware init */
static void ppc_spapr_init(ram_addr_t ram_size,
const char *boot_device,
const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename,
const char *cpu_model)
{
PowerPCCPU *cpu;
CPUPPCState *env;
PCIHostState *phb;
int i;
MemoryRegion *sysmem = get_system_memory();
MemoryRegion *ram = g_new(MemoryRegion, 1);
target_phys_addr_t rma_alloc_size;
uint32_t initrd_base = 0;
long kernel_size = 0, initrd_size = 0;
long load_limit, rtas_limit, fw_size;
char *filename;
msi_supported = true;
spapr = g_malloc0(sizeof(*spapr));
QLIST_INIT(&spapr->phbs);
cpu_ppc_hypercall = emulate_spapr_hypercall;
/* Allocate RMA if necessary */
rma_alloc_size = kvmppc_alloc_rma("ppc_spapr.rma", sysmem);
if (rma_alloc_size == -1) {
hw_error("qemu: Unable to create RMA\n");
exit(1);
}
if (rma_alloc_size && (rma_alloc_size < ram_size)) {
spapr->rma_size = rma_alloc_size;
} else {
spapr->rma_size = ram_size;
/* With KVM, we don't actually know whether KVM supports an
* unbounded RMA (PR KVM) or is limited by the hash table size
* (HV KVM using VRMA), so we always assume the latter
*
* In that case, we also limit the initial allocations for RTAS
* etc... to 256M since we have no way to know what the VRMA size
* is going to be as it depends on the size of the hash table
* isn't determined yet.
*/
if (kvm_enabled()) {
spapr->vrma_adjust = 1;
spapr->rma_size = MIN(spapr->rma_size, 0x10000000);
}
}
/* We place the device tree and RTAS just below either the top of the RMA,
* or just below 2GB, whichever is lowere, so that it can be
* processed with 32-bit real mode code if necessary */
rtas_limit = MIN(spapr->rma_size, 0x80000000);
spapr->rtas_addr = rtas_limit - RTAS_MAX_SIZE;
spapr->fdt_addr = spapr->rtas_addr - FDT_MAX_SIZE;
load_limit = spapr->fdt_addr - FW_OVERHEAD;
/* We aim for a hash table of size 1/128 the size of RAM. The
* normal rule of thumb is 1/64 the size of RAM, but that's much
* more than needed for the Linux guests we support. */
spapr->htab_shift = 18; /* Minimum architected size */
while (spapr->htab_shift <= 46) {
if ((1ULL << (spapr->htab_shift + 7)) >= ram_size) {
break;
}
spapr->htab_shift++;
}
/* init CPUs */
if (cpu_model == NULL) {
cpu_model = kvm_enabled() ? "host" : "POWER7";
}
for (i = 0; i < smp_cpus; i++) {
cpu = cpu_ppc_init(cpu_model);
if (cpu == NULL) {
fprintf(stderr, "Unable to find PowerPC CPU definition\n");
exit(1);
}
env = &cpu->env;
/* Set time-base frequency to 512 MHz */
cpu_ppc_tb_init(env, TIMEBASE_FREQ);
/* PAPR always has exception vectors in RAM not ROM */
env->hreset_excp_prefix = 0;
/* Tell KVM that we're in PAPR mode */
if (kvm_enabled()) {
kvmppc_set_papr(env);
}
qemu_register_reset(spapr_cpu_reset, cpu);
}
/* allocate RAM */
spapr->ram_limit = ram_size;
if (spapr->ram_limit > rma_alloc_size) {
ram_addr_t nonrma_base = rma_alloc_size;
ram_addr_t nonrma_size = spapr->ram_limit - rma_alloc_size;
memory_region_init_ram(ram, "ppc_spapr.ram", nonrma_size);
vmstate_register_ram_global(ram);
memory_region_add_subregion(sysmem, nonrma_base, ram);
}
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
spapr->rtas_size = load_image_targphys(filename, spapr->rtas_addr,
rtas_limit - spapr->rtas_addr);
if (spapr->rtas_size < 0) {
hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
exit(1);
}
if (spapr->rtas_size > RTAS_MAX_SIZE) {
hw_error("RTAS too big ! 0x%lx bytes (max is 0x%x)\n",
spapr->rtas_size, RTAS_MAX_SIZE);
exit(1);
}
g_free(filename);
/* Set up Interrupt Controller */
spapr->icp = xics_system_init(XICS_IRQS);
spapr->next_irq = 16;
/* Set up IOMMU */
spapr_iommu_init();
/* Set up VIO bus */
spapr->vio_bus = spapr_vio_bus_init();
for (i = 0; i < MAX_SERIAL_PORTS; i++) {
if (serial_hds[i]) {
spapr_vty_create(spapr->vio_bus, serial_hds[i]);
}
}
/* Set up PCI */
spapr_pci_rtas_init();
spapr_create_phb(spapr, "pci", SPAPR_PCI_BUID,
SPAPR_PCI_MEM_WIN_ADDR,
SPAPR_PCI_MEM_WIN_SIZE,
SPAPR_PCI_IO_WIN_ADDR,
SPAPR_PCI_MSI_WIN_ADDR);
phb = PCI_HOST_BRIDGE(QLIST_FIRST(&spapr->phbs));
for (i = 0; i < nb_nics; i++) {
NICInfo *nd = &nd_table[i];
if (!nd->model) {
nd->model = g_strdup("ibmveth");
}
if (strcmp(nd->model, "ibmveth") == 0) {
spapr_vlan_create(spapr->vio_bus, nd);
} else {
pci_nic_init_nofail(&nd_table[i], nd->model, NULL);
}
}
for (i = 0; i <= drive_get_max_bus(IF_SCSI); i++) {
spapr_vscsi_create(spapr->vio_bus);
}
/* Graphics */
if (spapr_vga_init(phb->bus)) {
spapr->has_graphics = true;
}
if (usb_enabled) {
pci_create_simple(phb->bus, -1, "pci-ohci");
if (spapr->has_graphics) {
usbdevice_create("keyboard");
usbdevice_create("mouse");
}
}
if (spapr->rma_size < (MIN_RMA_SLOF << 20)) {
fprintf(stderr, "qemu: pSeries SLOF firmware requires >= "
"%ldM guest RMA (Real Mode Area memory)\n", MIN_RMA_SLOF);
exit(1);
}
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,
load_limit - 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) {
/* Try to locate the initrd in the gap between the kernel
* and the firmware. Add a bit of space just in case
*/
initrd_base = (KERNEL_LOAD_ADDR + kernel_size + 0x1ffff) & ~0xffff;
initrd_size = load_image_targphys(initrd_filename, initrd_base,
load_limit - 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;
}
}
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;
/* Prepare the device tree */
spapr->fdt_skel = spapr_create_fdt_skel(cpu_model,
initrd_base, initrd_size,
kernel_size,
boot_device, kernel_cmdline);
assert(spapr->fdt_skel != NULL);
}
static QEMUMachine spapr_machine = {
.name = "pseries",
.desc = "pSeries Logical Partition (PAPR compliant)",
.init = ppc_spapr_init,
.reset = ppc_spapr_reset,
.max_cpus = MAX_CPUS,
.no_parallel = 1,
.use_scsi = 1,
};
static void spapr_machine_init(void)
{
qemu_register_machine(&spapr_machine);
}
machine_init(spapr_machine_init);
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