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hw/mips: malta: Add KVM support

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In KVM mode the bootrom is loaded and executed from the last 1MB of
DRAM.

Based on "[PATCH 12/12] KVM/MIPS: General KVM support and support for
SMP Guests" by Sanjay Lal <sanjayl@kymasys.com>.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
James Hogan 2014-06-17 23:10:35 +01:00 committed by Paolo Bonzini
parent b1bd8b28cc
commit b03118114d
1 changed files with 53 additions and 20 deletions
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71
hw/mips/mips_malta.c
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@ -51,6 +51,7 @@
#include "sysemu/qtest.h"
#include "qemu/error-report.h"
#include "hw/empty_slot.h"
#include "sysemu/kvm.h"
//#define DEBUG_BOARD_INIT
@ -603,29 +604,31 @@ static void network_init(PCIBus *pci_bus)
*/
static void write_bootloader (CPUMIPSState *env, uint8_t *base,
int64_t kernel_entry)
int64_t run_addr, int64_t kernel_entry)
{
uint32_t *p;
/* Small bootloader */
p = (uint32_t *)base;
stl_p(p++, 0x0bf00160); /* j 0x1fc00580 */
stl_p(p++, 0x08000000 | /* j 0x1fc00580 */
((run_addr + 0x580) & 0x0fffffff) >> 2);
stl_p(p++, 0x00000000); /* nop */
/* YAMON service vector */
stl_p(base + 0x500, 0xbfc00580); /* start: */
stl_p(base + 0x504, 0xbfc0083c); /* print_count: */
stl_p(base + 0x520, 0xbfc00580); /* start: */
stl_p(base + 0x52c, 0xbfc00800); /* flush_cache: */
stl_p(base + 0x534, 0xbfc00808); /* print: */
stl_p(base + 0x538, 0xbfc00800); /* reg_cpu_isr: */
stl_p(base + 0x53c, 0xbfc00800); /* unred_cpu_isr: */
stl_p(base + 0x540, 0xbfc00800); /* reg_ic_isr: */
stl_p(base + 0x544, 0xbfc00800); /* unred_ic_isr: */
stl_p(base + 0x548, 0xbfc00800); /* reg_esr: */
stl_p(base + 0x54c, 0xbfc00800); /* unreg_esr: */
stl_p(base + 0x550, 0xbfc00800); /* getchar: */
stl_p(base + 0x554, 0xbfc00800); /* syscon_read: */
stl_p(base + 0x500, run_addr + 0x0580); /* start: */
stl_p(base + 0x504, run_addr + 0x083c); /* print_count: */
stl_p(base + 0x520, run_addr + 0x0580); /* start: */
stl_p(base + 0x52c, run_addr + 0x0800); /* flush_cache: */
stl_p(base + 0x534, run_addr + 0x0808); /* print: */
stl_p(base + 0x538, run_addr + 0x0800); /* reg_cpu_isr: */
stl_p(base + 0x53c, run_addr + 0x0800); /* unred_cpu_isr: */
stl_p(base + 0x540, run_addr + 0x0800); /* reg_ic_isr: */
stl_p(base + 0x544, run_addr + 0x0800); /* unred_ic_isr: */
stl_p(base + 0x548, run_addr + 0x0800); /* reg_esr: */
stl_p(base + 0x54c, run_addr + 0x0800); /* unreg_esr: */
stl_p(base + 0x550, run_addr + 0x0800); /* getchar: */
stl_p(base + 0x554, run_addr + 0x0800); /* syscon_read: */
/* Second part of the bootloader */
@ -774,6 +777,7 @@ static int64_t load_kernel (void)
uint32_t *prom_buf;
long prom_size;
int prom_index = 0;
uint64_t (*xlate_to_kseg0) (void *opaque, uint64_t addr);
#ifdef TARGET_WORDS_BIGENDIAN
big_endian = 1;
@ -788,6 +792,11 @@ static int64_t load_kernel (void)
loaderparams.kernel_filename);
exit(1);
}
if (kvm_enabled()) {
xlate_to_kseg0 = cpu_mips_kvm_um_phys_to_kseg0;
} else {
xlate_to_kseg0 = cpu_mips_phys_to_kseg0;
}
/* load initrd */
initrd_size = 0;
@ -820,7 +829,7 @@ static int64_t load_kernel (void)
prom_set(prom_buf, prom_index++, "%s", loaderparams.kernel_filename);
if (initrd_size > 0) {
prom_set(prom_buf, prom_index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",
cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,
xlate_to_kseg0(NULL, initrd_offset), initrd_size,
loaderparams.kernel_cmdline);
} else {
prom_set(prom_buf, prom_index++, "%s", loaderparams.kernel_cmdline);
@ -829,6 +838,7 @@ static int64_t load_kernel (void)
prom_set(prom_buf, prom_index++, "memsize");
prom_set(prom_buf, prom_index++, "%i",
MIN(loaderparams.ram_size, 256 << 20));
prom_set(prom_buf, prom_index++, "modetty0");
prom_set(prom_buf, prom_index++, "38400n8r");
prom_set(prom_buf, prom_index++, NULL);
@ -863,6 +873,11 @@ static void main_cpu_reset(void *opaque)
}
malta_mips_config(cpu);
if (kvm_enabled()) {
/* Start running from the bootloader we wrote to end of RAM */
env->active_tc.PC = 0x40000000 + loaderparams.ram_size;
}
}
static void cpu_request_exit(void *opaque, int irq, int level)
@ -878,6 +893,7 @@ static
void mips_malta_init(MachineState *machine)
{
ram_addr_t ram_size = machine->ram_size;
ram_addr_t ram_low_size;
const char *cpu_model = machine->cpu_model;
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
@ -892,7 +908,7 @@ void mips_malta_init(MachineState *machine)
target_long bios_size = FLASH_SIZE;
const size_t smbus_eeprom_size = 8 * 256;
uint8_t *smbus_eeprom_buf = g_malloc0(smbus_eeprom_size);
int64_t kernel_entry;
int64_t kernel_entry, bootloader_run_addr;
PCIBus *pci_bus;
ISABus *isa_bus;
MIPSCPU *cpu;
@ -1011,13 +1027,30 @@ void mips_malta_init(MachineState *machine)
bios = pflash_cfi01_get_memory(fl);
fl_idx++;
if (kernel_filename) {
ram_low_size = MIN(ram_size, 256 << 20);
/* For KVM T&E we reserve 1MB of RAM for running bootloader */
if (kvm_enabled()) {
ram_low_size -= 0x100000;
bootloader_run_addr = 0x40000000 + ram_low_size;
} else {
bootloader_run_addr = 0xbfc00000;
}
/* Write a small bootloader to the flash location. */
loaderparams.ram_size = MIN(ram_size, 256 << 20);
loaderparams.ram_size = ram_low_size;
loaderparams.kernel_filename = kernel_filename;
loaderparams.kernel_cmdline = kernel_cmdline;
loaderparams.initrd_filename = initrd_filename;
kernel_entry = load_kernel();
write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);
write_bootloader(env, memory_region_get_ram_ptr(bios),
bootloader_run_addr, kernel_entry);
if (kvm_enabled()) {
/* Write the bootloader code @ the end of RAM, 1MB reserved */
write_bootloader(env, memory_region_get_ram_ptr(ram_low_preio) +
ram_low_size,
bootloader_run_addr, kernel_entry);
}
} else {
/* Load firmware from flash. */
if (!dinfo) {