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-rw-r--r--arch/powerpc/kvm/booke.c639
1 files changed, 639 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
new file mode 100644
index 000000000000..b1e90a15155a
--- /dev/null
+++ b/arch/powerpc/kvm/booke.c
@@ -0,0 +1,639 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright IBM Corp. 2007
+ *
+ * Authors: Hollis Blanchard <hollisb@us.ibm.com>
+ * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
+ */
+
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/kvm_host.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <asm/cputable.h>
+#include <asm/uaccess.h>
+#include <asm/kvm_ppc.h>
+#include <asm/cacheflush.h>
+
+#include "44x_tlb.h"
+
+unsigned long kvmppc_booke_handlers;
+
+#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
+#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
+
+struct kvm_stats_debugfs_item debugfs_entries[] = {
+ { "exits", VCPU_STAT(sum_exits) },
+ { "mmio", VCPU_STAT(mmio_exits) },
+ { "dcr", VCPU_STAT(dcr_exits) },
+ { "sig", VCPU_STAT(signal_exits) },
+ { "light", VCPU_STAT(light_exits) },
+ { "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
+ { "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
+ { "dtlb_r", VCPU_STAT(dtlb_real_miss_exits) },
+ { "dtlb_v", VCPU_STAT(dtlb_virt_miss_exits) },
+ { "sysc", VCPU_STAT(syscall_exits) },
+ { "isi", VCPU_STAT(isi_exits) },
+ { "dsi", VCPU_STAT(dsi_exits) },
+ { "inst_emu", VCPU_STAT(emulated_inst_exits) },
+ { "dec", VCPU_STAT(dec_exits) },
+ { "ext_intr", VCPU_STAT(ext_intr_exits) },
+ { "halt_wakeup", VCPU_STAT(halt_wakeup) },
+ { NULL }
+};
+
+static const u32 interrupt_msr_mask[16] = {
+ [BOOKE_INTERRUPT_CRITICAL] = MSR_ME,
+ [BOOKE_INTERRUPT_MACHINE_CHECK] = 0,
+ [BOOKE_INTERRUPT_DATA_STORAGE] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_INST_STORAGE] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_EXTERNAL] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_ALIGNMENT] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_PROGRAM] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_FP_UNAVAIL] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_SYSCALL] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_AP_UNAVAIL] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_DECREMENTER] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_FIT] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_WATCHDOG] = MSR_ME,
+ [BOOKE_INTERRUPT_DTLB_MISS] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_ITLB_MISS] = MSR_CE|MSR_ME|MSR_DE,
+ [BOOKE_INTERRUPT_DEBUG] = MSR_ME,
+};
+
+const unsigned char exception_priority[] = {
+ [BOOKE_INTERRUPT_DATA_STORAGE] = 0,
+ [BOOKE_INTERRUPT_INST_STORAGE] = 1,
+ [BOOKE_INTERRUPT_ALIGNMENT] = 2,
+ [BOOKE_INTERRUPT_PROGRAM] = 3,
+ [BOOKE_INTERRUPT_FP_UNAVAIL] = 4,
+ [BOOKE_INTERRUPT_SYSCALL] = 5,
+ [BOOKE_INTERRUPT_AP_UNAVAIL] = 6,
+ [BOOKE_INTERRUPT_DTLB_MISS] = 7,
+ [BOOKE_INTERRUPT_ITLB_MISS] = 8,
+ [BOOKE_INTERRUPT_MACHINE_CHECK] = 9,
+ [BOOKE_INTERRUPT_DEBUG] = 10,
+ [BOOKE_INTERRUPT_CRITICAL] = 11,
+ [BOOKE_INTERRUPT_WATCHDOG] = 12,
+ [BOOKE_INTERRUPT_EXTERNAL] = 13,
+ [BOOKE_INTERRUPT_FIT] = 14,
+ [BOOKE_INTERRUPT_DECREMENTER] = 15,
+};
+
+const unsigned char priority_exception[] = {
+ BOOKE_INTERRUPT_DATA_STORAGE,
+ BOOKE_INTERRUPT_INST_STORAGE,
+ BOOKE_INTERRUPT_ALIGNMENT,
+ BOOKE_INTERRUPT_PROGRAM,
+ BOOKE_INTERRUPT_FP_UNAVAIL,
+ BOOKE_INTERRUPT_SYSCALL,
+ BOOKE_INTERRUPT_AP_UNAVAIL,
+ BOOKE_INTERRUPT_DTLB_MISS,
+ BOOKE_INTERRUPT_ITLB_MISS,
+ BOOKE_INTERRUPT_MACHINE_CHECK,
+ BOOKE_INTERRUPT_DEBUG,
+ BOOKE_INTERRUPT_CRITICAL,
+ BOOKE_INTERRUPT_WATCHDOG,
+ BOOKE_INTERRUPT_EXTERNAL,
+ BOOKE_INTERRUPT_FIT,
+ BOOKE_INTERRUPT_DECREMENTER,
+};
+
+
+/* TODO: use vcpu_printf() */
+void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
+{
+ int i;
+
+ printk("pc: %08x msr: %08x\n", vcpu->arch.pc, vcpu->arch.msr);
+ printk("lr: %08x ctr: %08x\n", vcpu->arch.lr, vcpu->arch.ctr);
+ printk("srr0: %08x srr1: %08x\n", vcpu->arch.srr0, vcpu->arch.srr1);
+
+ printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
+
+ for (i = 0; i < 32; i += 4) {
+ printk("gpr%02d: %08x %08x %08x %08x\n", i,
+ vcpu->arch.gpr[i],
+ vcpu->arch.gpr[i+1],
+ vcpu->arch.gpr[i+2],
+ vcpu->arch.gpr[i+3]);
+ }
+}
+
+/* Check if we are ready to deliver the interrupt */
+static int kvmppc_can_deliver_interrupt(struct kvm_vcpu *vcpu, int interrupt)
+{
+ int r;
+
+ switch (interrupt) {
+ case BOOKE_INTERRUPT_CRITICAL:
+ r = vcpu->arch.msr & MSR_CE;
+ break;
+ case BOOKE_INTERRUPT_MACHINE_CHECK:
+ r = vcpu->arch.msr & MSR_ME;
+ break;
+ case BOOKE_INTERRUPT_EXTERNAL:
+ r = vcpu->arch.msr & MSR_EE;
+ break;
+ case BOOKE_INTERRUPT_DECREMENTER:
+ r = vcpu->arch.msr & MSR_EE;
+ break;
+ case BOOKE_INTERRUPT_FIT:
+ r = vcpu->arch.msr & MSR_EE;
+ break;
+ case BOOKE_INTERRUPT_WATCHDOG:
+ r = vcpu->arch.msr & MSR_CE;
+ break;
+ case BOOKE_INTERRUPT_DEBUG:
+ r = vcpu->arch.msr & MSR_DE;
+ break;
+ default:
+ r = 1;
+ }
+
+ return r;
+}
+
+static void kvmppc_deliver_interrupt(struct kvm_vcpu *vcpu, int interrupt)
+{
+ switch (interrupt) {
+ case BOOKE_INTERRUPT_DECREMENTER:
+ vcpu->arch.tsr |= TSR_DIS;
+ break;
+ }
+
+ vcpu->arch.srr0 = vcpu->arch.pc;
+ vcpu->arch.srr1 = vcpu->arch.msr;
+ vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[interrupt];
+ kvmppc_set_msr(vcpu, vcpu->arch.msr & interrupt_msr_mask[interrupt]);
+}
+
+/* Check pending exceptions and deliver one, if possible. */
+void kvmppc_check_and_deliver_interrupts(struct kvm_vcpu *vcpu)
+{
+ unsigned long *pending = &vcpu->arch.pending_exceptions;
+ unsigned int exception;
+ unsigned int priority;
+
+ priority = find_first_bit(pending, BITS_PER_BYTE * sizeof(*pending));
+ while (priority <= BOOKE_MAX_INTERRUPT) {
+ exception = priority_exception[priority];
+ if (kvmppc_can_deliver_interrupt(vcpu, exception)) {
+ kvmppc_clear_exception(vcpu, exception);
+ kvmppc_deliver_interrupt(vcpu, exception);
+ break;
+ }
+
+ priority = find_next_bit(pending,
+ BITS_PER_BYTE * sizeof(*pending),
+ priority + 1);
+ }
+}
+
+/**
+ * kvmppc_handle_exit
+ *
+ * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
+ */
+int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
+ unsigned int exit_nr)
+{
+ enum emulation_result er;
+ int r = RESUME_HOST;
+
+ local_irq_enable();
+
+ run->exit_reason = KVM_EXIT_UNKNOWN;
+ run->ready_for_interrupt_injection = 1;
+
+ switch (exit_nr) {
+ case BOOKE_INTERRUPT_MACHINE_CHECK:
+ printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
+ kvmppc_dump_vcpu(vcpu);
+ r = RESUME_HOST;
+ break;
+
+ case BOOKE_INTERRUPT_EXTERNAL:
+ case BOOKE_INTERRUPT_DECREMENTER:
+ /* Since we switched IVPR back to the host's value, the host
+ * handled this interrupt the moment we enabled interrupts.
+ * Now we just offer it a chance to reschedule the guest. */
+
+ /* XXX At this point the TLB still holds our shadow TLB, so if
+ * we do reschedule the host will fault over it. Perhaps we
+ * should politely restore the host's entries to minimize
+ * misses before ceding control. */
+ if (need_resched())
+ cond_resched();
+ if (exit_nr == BOOKE_INTERRUPT_DECREMENTER)
+ vcpu->stat.dec_exits++;
+ else
+ vcpu->stat.ext_intr_exits++;
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_PROGRAM:
+ if (vcpu->arch.msr & MSR_PR) {
+ /* Program traps generated by user-level software must be handled
+ * by the guest kernel. */
+ vcpu->arch.esr = vcpu->arch.fault_esr;
+ kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_PROGRAM);
+ r = RESUME_GUEST;
+ break;
+ }
+
+ er = kvmppc_emulate_instruction(run, vcpu);
+ switch (er) {
+ case EMULATE_DONE:
+ /* Future optimization: only reload non-volatiles if
+ * they were actually modified by emulation. */
+ vcpu->stat.emulated_inst_exits++;
+ r = RESUME_GUEST_NV;
+ break;
+ case EMULATE_DO_DCR:
+ run->exit_reason = KVM_EXIT_DCR;
+ r = RESUME_HOST;
+ break;
+ case EMULATE_FAIL:
+ /* XXX Deliver Program interrupt to guest. */
+ printk(KERN_CRIT "%s: emulation at %x failed (%08x)\n",
+ __func__, vcpu->arch.pc, vcpu->arch.last_inst);
+ /* For debugging, encode the failing instruction and
+ * report it to userspace. */
+ run->hw.hardware_exit_reason = ~0ULL << 32;
+ run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
+ r = RESUME_HOST;
+ break;
+ default:
+ BUG();
+ }
+ break;
+
+ case BOOKE_INTERRUPT_FP_UNAVAIL:
+ kvmppc_queue_exception(vcpu, exit_nr);
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_DATA_STORAGE:
+ vcpu->arch.dear = vcpu->arch.fault_dear;
+ vcpu->arch.esr = vcpu->arch.fault_esr;
+ kvmppc_queue_exception(vcpu, exit_nr);
+ vcpu->stat.dsi_exits++;
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_INST_STORAGE:
+ vcpu->arch.esr = vcpu->arch.fault_esr;
+ kvmppc_queue_exception(vcpu, exit_nr);
+ vcpu->stat.isi_exits++;
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_SYSCALL:
+ kvmppc_queue_exception(vcpu, exit_nr);
+ vcpu->stat.syscall_exits++;
+ r = RESUME_GUEST;
+ break;
+
+ case BOOKE_INTERRUPT_DTLB_MISS: {
+ struct kvmppc_44x_tlbe *gtlbe;
+ unsigned long eaddr = vcpu->arch.fault_dear;
+ gfn_t gfn;
+
+ /* Check the guest TLB. */
+ gtlbe = kvmppc_44x_dtlb_search(vcpu, eaddr);
+ if (!gtlbe) {
+ /* The guest didn't have a mapping for it. */
+ kvmppc_queue_exception(vcpu, exit_nr);
+ vcpu->arch.dear = vcpu->arch.fault_dear;
+ vcpu->arch.esr = vcpu->arch.fault_esr;
+ vcpu->stat.dtlb_real_miss_exits++;
+ r = RESUME_GUEST;
+ break;
+ }
+
+ vcpu->arch.paddr_accessed = tlb_xlate(gtlbe, eaddr);
+ gfn = vcpu->arch.paddr_accessed >> PAGE_SHIFT;
+
+ if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
+ /* The guest TLB had a mapping, but the shadow TLB
+ * didn't, and it is RAM. This could be because:
+ * a) the entry is mapping the host kernel, or
+ * b) the guest used a large mapping which we're faking
+ * Either way, we need to satisfy the fault without
+ * invoking the guest. */
+ kvmppc_mmu_map(vcpu, eaddr, gfn, gtlbe->tid,
+ gtlbe->word2);
+ vcpu->stat.dtlb_virt_miss_exits++;
+ r = RESUME_GUEST;
+ } else {
+ /* Guest has mapped and accessed a page which is not
+ * actually RAM. */
+ r = kvmppc_emulate_mmio(run, vcpu);
+ }
+
+ break;
+ }
+
+ case BOOKE_INTERRUPT_ITLB_MISS: {
+ struct kvmppc_44x_tlbe *gtlbe;
+ unsigned long eaddr = vcpu->arch.pc;
+ gfn_t gfn;
+
+ r = RESUME_GUEST;
+
+ /* Check the guest TLB. */
+ gtlbe = kvmppc_44x_itlb_search(vcpu, eaddr);
+ if (!gtlbe) {
+ /* The guest didn't have a mapping for it. */
+ kvmppc_queue_exception(vcpu, exit_nr);
+ vcpu->stat.itlb_real_miss_exits++;
+ break;
+ }
+
+ vcpu->stat.itlb_virt_miss_exits++;
+
+ gfn = tlb_xlate(gtlbe, eaddr) >> PAGE_SHIFT;
+
+ if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
+ /* The guest TLB had a mapping, but the shadow TLB
+ * didn't. This could be because:
+ * a) the entry is mapping the host kernel, or
+ * b) the guest used a large mapping which we're faking
+ * Either way, we need to satisfy the fault without
+ * invoking the guest. */
+ kvmppc_mmu_map(vcpu, eaddr, gfn, gtlbe->tid,
+ gtlbe->word2);
+ } else {
+ /* Guest mapped and leaped at non-RAM! */
+ kvmppc_queue_exception(vcpu,
+ BOOKE_INTERRUPT_MACHINE_CHECK);
+ }
+
+ break;
+ }
+
+ case BOOKE_INTERRUPT_DEBUG: {
+ u32 dbsr;
+
+ vcpu->arch.pc = mfspr(SPRN_CSRR0);
+
+ /* clear IAC events in DBSR register */
+ dbsr = mfspr(SPRN_DBSR);
+ dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
+ mtspr(SPRN_DBSR, dbsr);
+
+ run->exit_reason = KVM_EXIT_DEBUG;
+ r = RESUME_HOST;
+ break;
+ }
+
+ default:
+ printk(KERN_EMERG "exit_nr %d\n", exit_nr);
+ BUG();
+ }
+
+ local_irq_disable();
+
+ kvmppc_check_and_deliver_interrupts(vcpu);
+
+ /* Do some exit accounting. */
+ vcpu->stat.sum_exits++;
+ if (!(r & RESUME_HOST)) {
+ /* To avoid clobbering exit_reason, only check for signals if
+ * we aren't already exiting to userspace for some other
+ * reason. */
+ if (signal_pending(current)) {
+ run->exit_reason = KVM_EXIT_INTR;
+ r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
+
+ vcpu->stat.signal_exits++;
+ } else {
+ vcpu->stat.light_exits++;
+ }
+ } else {
+ switch (run->exit_reason) {
+ case KVM_EXIT_MMIO:
+ vcpu->stat.mmio_exits++;
+ break;
+ case KVM_EXIT_DCR:
+ vcpu->stat.dcr_exits++;
+ break;
+ case KVM_EXIT_INTR:
+ vcpu->stat.signal_exits++;
+ break;
+ }
+ }
+
+ return r;
+}
+
+/* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
+int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_44x_tlbe *tlbe = &vcpu->arch.guest_tlb[0];
+
+ tlbe->tid = 0;
+ tlbe->word0 = PPC44x_TLB_16M | PPC44x_TLB_VALID;
+ tlbe->word1 = 0;
+ tlbe->word2 = PPC44x_TLB_SX | PPC44x_TLB_SW | PPC44x_TLB_SR;
+
+ tlbe++;
+ tlbe->tid = 0;
+ tlbe->word0 = 0xef600000 | PPC44x_TLB_4K | PPC44x_TLB_VALID;
+ tlbe->word1 = 0xef600000;
+ tlbe->word2 = PPC44x_TLB_SX | PPC44x_TLB_SW | PPC44x_TLB_SR
+ | PPC44x_TLB_I | PPC44x_TLB_G;
+
+ vcpu->arch.pc = 0;
+ vcpu->arch.msr = 0;
+ vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
+
+ vcpu->arch.shadow_pid = 1;
+
+ /* Eye-catching number so we know if the guest takes an interrupt
+ * before it's programmed its own IVPR. */
+ vcpu->arch.ivpr = 0x55550000;
+
+ /* Since the guest can directly access the timebase, it must know the
+ * real timebase frequency. Accordingly, it must see the state of
+ * CCR1[TCS]. */
+ vcpu->arch.ccr1 = mfspr(SPRN_CCR1);
+
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+ int i;
+
+ regs->pc = vcpu->arch.pc;
+ regs->cr = vcpu->arch.cr;
+ regs->ctr = vcpu->arch.ctr;
+ regs->lr = vcpu->arch.lr;
+ regs->xer = vcpu->arch.xer;
+ regs->msr = vcpu->arch.msr;
+ regs->srr0 = vcpu->arch.srr0;
+ regs->srr1 = vcpu->arch.srr1;
+ regs->pid = vcpu->arch.pid;
+ regs->sprg0 = vcpu->arch.sprg0;
+ regs->sprg1 = vcpu->arch.sprg1;
+ regs->sprg2 = vcpu->arch.sprg2;
+ regs->sprg3 = vcpu->arch.sprg3;
+ regs->sprg5 = vcpu->arch.sprg4;
+ regs->sprg6 = vcpu->arch.sprg5;
+ regs->sprg7 = vcpu->arch.sprg6;
+
+ for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
+ regs->gpr[i] = vcpu->arch.gpr[i];
+
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+ int i;
+
+ vcpu->arch.pc = regs->pc;
+ vcpu->arch.cr = regs->cr;
+ vcpu->arch.ctr = regs->ctr;
+ vcpu->arch.lr = regs->lr;
+ vcpu->arch.xer = regs->xer;
+ vcpu->arch.msr = regs->msr;
+ vcpu->arch.srr0 = regs->srr0;
+ vcpu->arch.srr1 = regs->srr1;
+ vcpu->arch.sprg0 = regs->sprg0;
+ vcpu->arch.sprg1 = regs->sprg1;
+ vcpu->arch.sprg2 = regs->sprg2;
+ vcpu->arch.sprg3 = regs->sprg3;
+ vcpu->arch.sprg5 = regs->sprg4;
+ vcpu->arch.sprg6 = regs->sprg5;
+ vcpu->arch.sprg7 = regs->sprg6;
+
+ for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
+ vcpu->arch.gpr[i] = regs->gpr[i];
+
+ return 0;
+}
+
+int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
+{
+ return -ENOTSUPP;
+}
+
+int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
+{
+ return -ENOTSUPP;
+}
+
+int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
+{
+ return -ENOTSUPP;
+}
+
+int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
+{
+ return -ENOTSUPP;
+}
+
+/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
+int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
+ struct kvm_translation *tr)
+{
+ struct kvmppc_44x_tlbe *gtlbe;
+ int index;
+ gva_t eaddr;
+ u8 pid;
+ u8 as;
+
+ eaddr = tr->linear_address;
+ pid = (tr->linear_address >> 32) & 0xff;
+ as = (tr->linear_address >> 40) & 0x1;
+
+ index = kvmppc_44x_tlb_index(vcpu, eaddr, pid, as);
+ if (index == -1) {
+ tr->valid = 0;
+ return 0;
+ }
+
+ gtlbe = &vcpu->arch.guest_tlb[index];
+
+ tr->physical_address = tlb_xlate(gtlbe, eaddr);
+ /* XXX what does "writeable" and "usermode" even mean? */
+ tr->valid = 1;
+
+ return 0;
+}
+
+static int kvmppc_booke_init(void)
+{
+ unsigned long ivor[16];
+ unsigned long max_ivor = 0;
+ int i;
+
+ /* We install our own exception handlers by hijacking IVPR. IVPR must
+ * be 16-bit aligned, so we need a 64KB allocation. */
+ kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
+ VCPU_SIZE_ORDER);
+ if (!kvmppc_booke_handlers)
+ return -ENOMEM;
+
+ /* XXX make sure our handlers are smaller than Linux's */
+
+ /* Copy our interrupt handlers to match host IVORs. That way we don't
+ * have to swap the IVORs on every guest/host transition. */
+ ivor[0] = mfspr(SPRN_IVOR0);
+ ivor[1] = mfspr(SPRN_IVOR1);
+ ivor[2] = mfspr(SPRN_IVOR2);
+ ivor[3] = mfspr(SPRN_IVOR3);
+ ivor[4] = mfspr(SPRN_IVOR4);
+ ivor[5] = mfspr(SPRN_IVOR5);
+ ivor[6] = mfspr(SPRN_IVOR6);
+ ivor[7] = mfspr(SPRN_IVOR7);
+ ivor[8] = mfspr(SPRN_IVOR8);
+ ivor[9] = mfspr(SPRN_IVOR9);
+ ivor[10] = mfspr(SPRN_IVOR10);
+ ivor[11] = mfspr(SPRN_IVOR11);
+ ivor[12] = mfspr(SPRN_IVOR12);
+ ivor[13] = mfspr(SPRN_IVOR13);
+ ivor[14] = mfspr(SPRN_IVOR14);
+ ivor[15] = mfspr(SPRN_IVOR15);
+
+ for (i = 0; i < 16; i++) {
+ if (ivor[i] > max_ivor)
+ max_ivor = ivor[i];
+
+ memcpy((void *)kvmppc_booke_handlers + ivor[i],
+ kvmppc_handlers_start + i * kvmppc_handler_len,
+ kvmppc_handler_len);
+ }
+ flush_icache_range(kvmppc_booke_handlers,
+ kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
+
+ return kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE);
+}
+
+static void __exit kvmppc_booke_exit(void)
+{
+ free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
+ kvm_exit();
+}
+
+module_init(kvmppc_booke_init)
+module_exit(kvmppc_booke_exit)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 18:53:17 +0000