From: Sanjay Lal <sanjayl@xxxxxxxxxxx>
Implement the main KVM arch API for MIPS.
Signed-off-by: Sanjay Lal <sanjayl@xxxxxxxxxxx>
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Aurelien Jarno <aurelien@xxxxxxxxxxx>
Cc: Gleb Natapov <gleb@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Andreas Färber <afaerber@xxxxxxx>
Cc: Peter Maydell <peter.maydell@xxxxxxxxxx>
---
Changes in v4:
(No functional changes, assembly output unchanged)
- Use int32_t instead of int32 (which is for softfloat) in kvm register
accessors (Andreas Färber).
- Use uint64_t instead of __u64 (which is really just for kernel
headers) in the kvm register accessors (Andreas Färber).
- Cast pointer to uintptr_t rather than target_ulong in kvm register
accessors.
- Remove some redundant casts in kvm register accessors.
Changes in v3:
- s/dprintf/DPRINTF/ (Andreas Färber).
- Use "cs" rather than "cpu" or "env" for CPUState variable names
(Andreas Färber).
- Use CPUMIPSState rather than CPUArchState (Andreas Färber).
- Pass MIPSCPU to cpu_mips_io_interrupts_pending() rather than
CPUMIPSState (Andreas Färber).
- Remove spurious parentheses around cpu_mips_io_interrupts_pending()
call (Andreas Färber).
- Pass MIPSCPU to kvm_mips_set_[ipi_]interrupt (Andreas Färber).
- Make use of error_report (Andreas Färber) and clean up error messages
a little to include __func__.
- Remove inline kvm_mips_{put,get}_one_[ul]reg() declarations from
kvm_mips.h. They're only used in target-mips/kvm.c anyway.
- Make kvm_arch_{put,get}_registers static within target-mips/kvm.c and
remove from kvm_mips.h.
- Set sigmask length to 16 from kvm_arch_init() since MIPS Linux has
128 signals. This is better than cluttering kvm_all.c with TARGET_*
ifdefs (Peter Maydell).
Changes in v2:
- Expand commit message
- Checkpatch cleanups.
- Some interrupt bug fixes from Yann Le Du <ledu@xxxxxxxxxxx>
- Add get/set register functionality from Yann Le Du <ledu@xxxxxxxxxxx>
- Use new 64 bit compatible ABI from Cavium from Sanjay Lal
<sanjayl@xxxxxxxxxxx>
- Add dummy kvm_arch_init_irq_routing()
The common KVM code insists on calling kvm_arch_init_irq_routing() as
soon as it sees kernel header support for it (regardless of whether
QEMU supports it). Provide a dummy function to satisfy this.
- Remove request_interrupt_window code (Peter Maydell)
---
target-mips/kvm.c | 472 +++++++++++++++++++++++++++++++++++++++++++++++++
target-mips/kvm_mips.h | 19 ++
2 files changed, 491 insertions(+)
create mode 100644 target-mips/kvm.c
create mode 100644 target-mips/kvm_mips.h
diff --git a/target-mips/kvm.c b/target-mips/kvm.c
new file mode 100644
index 0000000..ee477a3
--- /dev/null
+++ b/target-mips/kvm.c
@@ -0,0 +1,472 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: MIPS specific KVM APIs
+ *
+ * Copyright (C) 2012-2014 Imagination Technologies Ltd.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+*/
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+#include <linux/kvm.h>
+
+#include "qemu-common.h"
+#include "qemu/error-report.h"
+#include "qemu/timer.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/kvm.h"
+#include "cpu.h"
+#include "sysemu/cpus.h"
+#include "kvm_mips.h"
+
+#define DEBUG_KVM 0
+
+#define DPRINTF(fmt, ...) \
+ do { if (DEBUG_KVM) { fprintf(stderr, fmt, ## __VA_ARGS__); } } while (0)
+
+const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
+ KVM_CAP_LAST_INFO
+};
+
+unsigned long kvm_arch_vcpu_id(CPUState *cs)
+{
+ return cs->cpu_index;
+}
+
+int kvm_arch_init(KVMState *s)
+{
+ /* MIPS has 128 signals */
+ kvm_set_sigmask_len(s, 16);
+
+ DPRINTF("%s\n", __func__);
+ return 0;
+}
+
+int kvm_arch_init_vcpu(CPUState *cs)
+{
+ int ret = 0;
+ DPRINTF("%s\n", __func__);
+ return ret;
+}
+
+void kvm_arch_reset_vcpu(CPUState *cs)
+{
+ DPRINTF("%s\n", __func__);
+}
+
+int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
+{
+ DPRINTF("%s\n", __func__);
+ return 0;
+}
+
+int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
+{
+ DPRINTF("%s\n", __func__);
+ return 0;
+}
+
+static inline int cpu_mips_io_interrupts_pending(MIPSCPU *cpu)
+{
+ CPUMIPSState *env = &cpu->env;
+
+ DPRINTF("%s: %#x\n", __func__, env->CP0_Cause & (1 << (2 + CP0Ca_IP)));
+ return env->CP0_Cause & (0x1 << (2 + CP0Ca_IP));
+}
+
+
+void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run)
+{
+ MIPSCPU *cpu = MIPS_CPU(cs);
+ int r;
+ struct kvm_mips_interrupt intr;
+
+ if ((cs->interrupt_request & CPU_INTERRUPT_HARD) &&
+ cpu_mips_io_interrupts_pending(cpu)) {
+ intr.cpu = -1;
+ intr.irq = 2;
+ r = kvm_vcpu_ioctl(cs, KVM_INTERRUPT, &intr);
+ if (r < 0) {
+ error_report("%s: cpu %d: failed to inject IRQ %x",
+ __func__, cs->cpu_index, intr.irq);
+ }
+ }
+}
+
+void kvm_arch_post_run(CPUState *cs, struct kvm_run *run)
+{
+ DPRINTF("%s\n", __func__);
+}
+
+int kvm_arch_process_async_events(CPUState *cs)
+{
+ return cs->halted;
+}
+
+int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
+{
+ int ret;
+
+ DPRINTF("%s\n", __func__);
+ switch (run->exit_reason) {
+ default:
+ error_report("%s: unknown exit reason %d",
+ __func__, run->exit_reason);
+ ret = -1;
+ break;
+ }
+
+ return ret;
+}
+
+bool kvm_arch_stop_on_emulation_error(CPUState *cs)
+{
+ DPRINTF("%s\n", __func__);
+ return true;
+}
+
+int kvm_arch_on_sigbus_vcpu(CPUState *cs, int code, void *addr)
+{
+ DPRINTF("%s\n", __func__);
+ return 1;
+}
+
+int kvm_arch_on_sigbus(int code, void *addr)
+{
+ DPRINTF("%s\n", __func__);
+ return 1;
+}
+
+void kvm_arch_init_irq_routing(KVMState *s)
+{
+}
+
+int kvm_mips_set_interrupt(MIPSCPU *cpu, int irq, int level)
+{
+ CPUState *cs = CPU(cpu);
+ struct kvm_mips_interrupt intr;
+
+ if (!kvm_enabled()) {
+ return 0;
+ }
+
+ intr.cpu = -1;
+
+ if (level) {
+ intr.irq = irq;
+ } else {
+ intr.irq = -irq;
+ }
+
+ kvm_vcpu_ioctl(cs, KVM_INTERRUPT, &intr);
+
+ return 0;
+}
+
+int kvm_mips_set_ipi_interrupt(MIPSCPU *cpu, int irq, int level)
+{
+ CPUState *cs = current_cpu;
+ CPUState *dest_cs = CPU(cpu);
+ struct kvm_mips_interrupt intr;
+
+ if (!kvm_enabled()) {
+ return 0;
+ }
+
+ intr.cpu = dest_cs->cpu_index;
+
+ if (level) {
+ intr.irq = irq;
+ } else {
+ intr.irq = -irq;
+ }
+
+ DPRINTF("%s: CPU %d, IRQ: %d\n", __func__, intr.cpu, intr.irq);
+
+ kvm_vcpu_ioctl(cs, KVM_INTERRUPT, &intr);
+
+ return 0;
+}
+
+#define KVM_REG_MIPS_CP0_INDEX (0x10000 + (8 * 0) + 0)
+#define KVM_REG_MIPS_CP0_ENTRYLO0 (0x10000 + (8 * 2) + 0)
+#define KVM_REG_MIPS_CP0_ENTRYLO1 (0x10000 + (8 * 3) + 0)
+#define KVM_REG_MIPS_CP0_CONTEXT (0x10000 + (8 * 4) + 0)
+#define KVM_REG_MIPS_CP0_USERLOCAL (0x10000 + (8 * 4) + 2)
+#define KVM_REG_MIPS_CP0_PAGEMASK (0x10000 + (8 * 5) + 0)
+#define KVM_REG_MIPS_CP0_PAGEGRAIN (0x10000 + (8 * 5) + 1)
+#define KVM_REG_MIPS_CP0_WIRED (0x10000 + (8 * 6) + 0)
+#define KVM_REG_MIPS_CP0_HWRENA (0x10000 + (8 * 7) + 0)
+#define KVM_REG_MIPS_CP0_BADVADDR (0x10000 + (8 * 8) + 0)
+#define KVM_REG_MIPS_CP0_COUNT (0x10000 + (8 * 9) + 0)
+#define KVM_REG_MIPS_CP0_ENTRYHI (0x10000 + (8 * 10) + 0)
+#define KVM_REG_MIPS_CP0_COMPARE (0x10000 + (8 * 11) + 0)
+#define KVM_REG_MIPS_CP0_STATUS (0x10000 + (8 * 12) + 0)
+#define KVM_REG_MIPS_CP0_INTCTL (0x10000 + (8 * 12) + 1)
+#define KVM_REG_MIPS_CP0_CAUSE (0x10000 + (8 * 13) + 0)
+#define KVM_REG_MIPS_CP0_EPC (0x10000 + (8 * 14) + 0)
+#define KVM_REG_MIPS_CP0_PRID (0x10000 + (8 * 15) + 0)
+#define KVM_REG_MIPS_CP0_EBASE (0x10000 + (8 * 15) + 1)
+#define KVM_REG_MIPS_CP0_CONFIG (0x10000 + (8 * 16) + 0)
+#define KVM_REG_MIPS_CP0_CONFIG1 (0x10000 + (8 * 16) + 1)
+#define KVM_REG_MIPS_CP0_CONFIG2 (0x10000 + (8 * 16) + 2)
+#define KVM_REG_MIPS_CP0_CONFIG3 (0x10000 + (8 * 16) + 3)
+#define KVM_REG_MIPS_CP0_CONFIG4 (0x10000 + (8 * 16) + 4)
+#define KVM_REG_MIPS_CP0_CONFIG5 (0x10000 + (8 * 16) + 5)
+#define KVM_REG_MIPS_CP0_CONFIG7 (0x10000 + (8 * 16) + 7)
+#define KVM_REG_MIPS_CP0_XCONTEXT (0x10000 + (8 * 20) + 0)
+#define KVM_REG_MIPS_CP0_ERROREPC (0x10000 + (8 * 30) + 0)
+
+static inline int kvm_mips_put_one_reg(CPUState *cs, int reg_id, int32_t *addr)
+{
+ uint64_t val64 = *addr;
+ struct kvm_one_reg cp0reg = {
+ .id = reg_id,
+ .addr = (uintptr_t)&val64
+ };
+
+ return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &cp0reg);
+}
+
+static inline int kvm_mips_put_one_ulreg(CPUState *cs, int reg_id,
+ target_ulong *addr)
+{
+ uint64_t val64 = *addr;
+ struct kvm_one_reg cp0reg = {
+ .id = reg_id,
+ .addr = (uintptr_t)&val64
+ };
+
+ return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &cp0reg);
+}
+
+static inline int kvm_mips_get_one_reg(CPUState *cs, int reg_id, int32_t *addr)
+{
+ int ret;
+ uint64_t val64 = 0;
+ struct kvm_one_reg cp0reg = {
+ .id = reg_id,
+ .addr = (uintptr_t)&val64
+ };
+
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &cp0reg);
+ if (ret < 0) {
+ return ret;
+ }
+
+ *addr = val64;
+ return ret;
+}
+
+static inline int kvm_mips_get_one_ulreg(CPUState *cs, int reg_id,
+ target_ulong *addr)
+{
+ int ret;
+ uint64_t val64 = 0;
+ struct kvm_one_reg cp0reg = {
+ .id = reg_id,
+ .addr = (uintptr_t)&val64
+ };
+
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &cp0reg);
+ if (ret < 0) {
+ return ret;
+ }
+
+ *addr = val64;
+ return ret;
+}
+
+static int kvm_mips_te_put_cp0_registers(CPUState *cs, int level)
+{
+ MIPSCPU *cpu = MIPS_CPU(cs);
+ CPUMIPSState *env = &cpu->env;
+ int ret;
+
+ (void)level;
+
+ ret = kvm_mips_put_one_reg(cs, KVM_REG_MIPS_CP0_INDEX, &env->CP0_Index);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_ulreg(cs, KVM_REG_MIPS_CP0_CONTEXT,
+ &env->CP0_Context);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_reg(cs, KVM_REG_MIPS_CP0_PAGEMASK,
+ &env->CP0_PageMask);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_reg(cs, KVM_REG_MIPS_CP0_WIRED, &env->CP0_Wired);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_ulreg(cs, KVM_REG_MIPS_CP0_BADVADDR,
+ &env->CP0_BadVAddr);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_reg(cs, KVM_REG_MIPS_CP0_COUNT, &env->CP0_Count);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_ulreg(cs, KVM_REG_MIPS_CP0_ENTRYHI,
+ &env->CP0_EntryHi);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_reg(cs, KVM_REG_MIPS_CP0_COMPARE,
+ &env->CP0_Compare);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_reg(cs, KVM_REG_MIPS_CP0_STATUS, &env->CP0_Status);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_reg(cs, KVM_REG_MIPS_CP0_CAUSE, &env->CP0_Cause);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_ulreg(cs, KVM_REG_MIPS_CP0_EPC, &env->CP0_EPC);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_put_one_ulreg(cs, KVM_REG_MIPS_CP0_ERROREPC,
+ &env->CP0_ErrorEPC);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return ret;
+}
+
+static int kvm_mips_te_get_cp0_registers(CPUState *cs)
+{
+ MIPSCPU *cpu = MIPS_CPU(cs);
+ CPUMIPSState *env = &cpu->env;
+ int ret;
+
+ ret = kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_INDEX, &env->CP0_Index);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_ulreg(cs, KVM_REG_MIPS_CP0_CONTEXT,
+ &env->CP0_Context);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_PAGEMASK,
+ &env->CP0_PageMask);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_WIRED, &env->CP0_Wired);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_ulreg(cs, KVM_REG_MIPS_CP0_BADVADDR,
+ &env->CP0_BadVAddr);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_COUNT, &env->CP0_Count);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_ulreg(cs, KVM_REG_MIPS_CP0_ENTRYHI,
+ &env->CP0_EntryHi);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_COMPARE,
+ &env->CP0_Compare);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_STATUS, &env->CP0_Status);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_CAUSE, &env->CP0_Cause);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_ulreg(cs, KVM_REG_MIPS_CP0_EPC, &env->CP0_EPC);
+ if (ret < 0) {
+ return ret;
+ }
+ ret |= kvm_mips_get_one_ulreg(cs, KVM_REG_MIPS_CP0_ERROREPC,
+ &env->CP0_ErrorEPC);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return ret;
+}
+
+int kvm_arch_put_registers(CPUState *cs, int level)
+{
+ MIPSCPU *cpu = MIPS_CPU(cs);
+ CPUMIPSState *env = &cpu->env;
+ struct kvm_regs regs;
+ int ret;
+ int i;
+
+ /* Set the registers based on QEMU's view of things */
+ for (i = 0; i < 32; i++) {
+ regs.gpr[i] = env->active_tc.gpr[i];
+ }
+
+ regs.hi = env->active_tc.HI[0];
+ regs.lo = env->active_tc.LO[0];
+ regs.pc = env->active_tc.PC;
+
+ ret = kvm_vcpu_ioctl(cs, KVM_SET_REGS, ®s);
+
+ if (ret < 0) {
+ return ret;
+ }
+
+ ret = kvm_mips_te_put_cp0_registers(cs, KVM_PUT_FULL_STATE);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return ret;
+}
+
+int kvm_arch_get_registers(CPUState *cs)
+{
+ MIPSCPU *cpu = MIPS_CPU(cs);
+ CPUMIPSState *env = &cpu->env;
+ int ret = 0;
+ struct kvm_regs regs;
+ int i;
+
+ /* Get the current register set as KVM seems it */
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_REGS, ®s);
+
+ if (ret < 0) {
+ return ret;
+ }
+
+ for (i = 0; i < 32; i++) {
+ env->active_tc.gpr[i] = regs.gpr[i];
+ }
+
+ env->active_tc.HI[0] = regs.hi;
+ env->active_tc.LO[0] = regs.lo;
+ env->active_tc.PC = regs.pc;
+
+ kvm_mips_te_get_cp0_registers(cs);
+
+ return ret;
+}
diff --git a/target-mips/kvm_mips.h b/target-mips/kvm_mips.h
new file mode 100644
index 0000000..7ada267
--- /dev/null
+++ b/target-mips/kvm_mips.h
@@ -0,0 +1,19 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: MIPS specific KVM APIs
+ *
+ * Copyright (C) 2012-2014 Imagination Technologies Ltd.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+*/
+
+#ifndef __KVM_MIPS_H__
+#define __KVM_MIPS_H__
+
+
+int kvm_mips_set_interrupt(MIPSCPU *cpu, int irq, int level);
+int kvm_mips_set_ipi_interrupt(MIPSCPU *cpu, int irq, int level);
+
+#endif /* __KVM_MIPS_H__ */
--
1.8.1.2
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