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-rw-r--r--arch/powerpc/kvm/book3s_pr.c2135
1 files changed, 2135 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
new file mode 100644
index 000000000..b1fefa63e
--- /dev/null
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -0,0 +1,2135 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
+ *
+ * Authors:
+ * Alexander Graf <agraf@suse.de>
+ * Kevin Wolf <mail@kevin-wolf.de>
+ * Paul Mackerras <paulus@samba.org>
+ *
+ * Description:
+ * Functions relating to running KVM on Book 3S processors where
+ * we don't have access to hypervisor mode, and we run the guest
+ * in problem state (user mode).
+ *
+ * This file is derived from arch/powerpc/kvm/44x.c,
+ * by Hollis Blanchard <hollisb@us.ibm.com>.
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/export.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include <asm/reg.h>
+#include <asm/cputable.h>
+#include <asm/cacheflush.h>
+#include <linux/uaccess.h>
+#include <asm/io.h>
+#include <asm/kvm_ppc.h>
+#include <asm/kvm_book3s.h>
+#include <asm/mmu_context.h>
+#include <asm/switch_to.h>
+#include <asm/firmware.h>
+#include <asm/setup.h>
+#include <linux/gfp.h>
+#include <linux/sched.h>
+#include <linux/vmalloc.h>
+#include <linux/highmem.h>
+#include <linux/module.h>
+#include <linux/miscdevice.h>
+#include <asm/asm-prototypes.h>
+#include <asm/tm.h>
+
+#include "book3s.h"
+
+#define CREATE_TRACE_POINTS
+#include "trace_pr.h"
+
+/* #define EXIT_DEBUG */
+/* #define DEBUG_EXT */
+
+static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
+ ulong msr);
+#ifdef CONFIG_PPC_BOOK3S_64
+static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac);
+#endif
+
+/* Some compatibility defines */
+#ifdef CONFIG_PPC_BOOK3S_32
+#define MSR_USER32 MSR_USER
+#define MSR_USER64 MSR_USER
+#define HW_PAGE_SIZE PAGE_SIZE
+#define HPTE_R_M _PAGE_COHERENT
+#endif
+
+static bool kvmppc_is_split_real(struct kvm_vcpu *vcpu)
+{
+ ulong msr = kvmppc_get_msr(vcpu);
+ return (msr & (MSR_IR|MSR_DR)) == MSR_DR;
+}
+
+static void kvmppc_fixup_split_real(struct kvm_vcpu *vcpu)
+{
+ ulong msr = kvmppc_get_msr(vcpu);
+ ulong pc = kvmppc_get_pc(vcpu);
+
+ /* We are in DR only split real mode */
+ if ((msr & (MSR_IR|MSR_DR)) != MSR_DR)
+ return;
+
+ /* We have not fixed up the guest already */
+ if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK)
+ return;
+
+ /* The code is in fixupable address space */
+ if (pc & SPLIT_HACK_MASK)
+ return;
+
+ vcpu->arch.hflags |= BOOK3S_HFLAG_SPLIT_HACK;
+ kvmppc_set_pc(vcpu, pc | SPLIT_HACK_OFFS);
+}
+
+static void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
+ ulong pc = kvmppc_get_pc(vcpu);
+ ulong lr = kvmppc_get_lr(vcpu);
+ if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
+ kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
+ if ((lr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
+ kvmppc_set_lr(vcpu, lr & ~SPLIT_HACK_MASK);
+ vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
+ }
+}
+
+static void kvmppc_inject_interrupt_pr(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags)
+{
+ unsigned long msr, pc, new_msr, new_pc;
+
+ kvmppc_unfixup_split_real(vcpu);
+
+ msr = kvmppc_get_msr(vcpu);
+ pc = kvmppc_get_pc(vcpu);
+ new_msr = vcpu->arch.intr_msr;
+ new_pc = to_book3s(vcpu)->hior + vec;
+
+#ifdef CONFIG_PPC_BOOK3S_64
+ /* If transactional, change to suspend mode on IRQ delivery */
+ if (MSR_TM_TRANSACTIONAL(msr))
+ new_msr |= MSR_TS_S;
+ else
+ new_msr |= msr & MSR_TS_MASK;
+#endif
+
+ kvmppc_set_srr0(vcpu, pc);
+ kvmppc_set_srr1(vcpu, (msr & SRR1_MSR_BITS) | srr1_flags);
+ kvmppc_set_pc(vcpu, new_pc);
+ kvmppc_set_msr(vcpu, new_msr);
+}
+
+static void kvmppc_core_vcpu_load_pr(struct kvm_vcpu *vcpu, int cpu)
+{
+#ifdef CONFIG_PPC_BOOK3S_64
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
+ memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
+ svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
+ svcpu->in_use = 0;
+ svcpu_put(svcpu);
+#endif
+
+ /* Disable AIL if supported */
+ if (cpu_has_feature(CPU_FTR_HVMODE) &&
+ cpu_has_feature(CPU_FTR_ARCH_207S))
+ mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) & ~LPCR_AIL);
+
+ vcpu->cpu = smp_processor_id();
+#ifdef CONFIG_PPC_BOOK3S_32
+ current->thread.kvm_shadow_vcpu = vcpu->arch.shadow_vcpu;
+#endif
+
+ if (kvmppc_is_split_real(vcpu))
+ kvmppc_fixup_split_real(vcpu);
+
+ kvmppc_restore_tm_pr(vcpu);
+}
+
+static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
+{
+#ifdef CONFIG_PPC_BOOK3S_64
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
+ if (svcpu->in_use) {
+ kvmppc_copy_from_svcpu(vcpu);
+ }
+ memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
+ to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
+ svcpu_put(svcpu);
+#endif
+
+ if (kvmppc_is_split_real(vcpu))
+ kvmppc_unfixup_split_real(vcpu);
+
+ kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
+ kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
+ kvmppc_save_tm_pr(vcpu);
+
+ /* Enable AIL if supported */
+ if (cpu_has_feature(CPU_FTR_HVMODE) &&
+ cpu_has_feature(CPU_FTR_ARCH_207S))
+ mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) | LPCR_AIL_3);
+
+ vcpu->cpu = -1;
+}
+
+/* Copy data needed by real-mode code from vcpu to shadow vcpu */
+void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
+
+ svcpu->gpr[0] = vcpu->arch.regs.gpr[0];
+ svcpu->gpr[1] = vcpu->arch.regs.gpr[1];
+ svcpu->gpr[2] = vcpu->arch.regs.gpr[2];
+ svcpu->gpr[3] = vcpu->arch.regs.gpr[3];
+ svcpu->gpr[4] = vcpu->arch.regs.gpr[4];
+ svcpu->gpr[5] = vcpu->arch.regs.gpr[5];
+ svcpu->gpr[6] = vcpu->arch.regs.gpr[6];
+ svcpu->gpr[7] = vcpu->arch.regs.gpr[7];
+ svcpu->gpr[8] = vcpu->arch.regs.gpr[8];
+ svcpu->gpr[9] = vcpu->arch.regs.gpr[9];
+ svcpu->gpr[10] = vcpu->arch.regs.gpr[10];
+ svcpu->gpr[11] = vcpu->arch.regs.gpr[11];
+ svcpu->gpr[12] = vcpu->arch.regs.gpr[12];
+ svcpu->gpr[13] = vcpu->arch.regs.gpr[13];
+ svcpu->cr = vcpu->arch.regs.ccr;
+ svcpu->xer = vcpu->arch.regs.xer;
+ svcpu->ctr = vcpu->arch.regs.ctr;
+ svcpu->lr = vcpu->arch.regs.link;
+ svcpu->pc = vcpu->arch.regs.nip;
+#ifdef CONFIG_PPC_BOOK3S_64
+ svcpu->shadow_fscr = vcpu->arch.shadow_fscr;
+#endif
+ /*
+ * Now also save the current time base value. We use this
+ * to find the guest purr and spurr value.
+ */
+ vcpu->arch.entry_tb = get_tb();
+ vcpu->arch.entry_vtb = get_vtb();
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ vcpu->arch.entry_ic = mfspr(SPRN_IC);
+ svcpu->in_use = true;
+
+ svcpu_put(svcpu);
+}
+
+static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
+{
+ ulong guest_msr = kvmppc_get_msr(vcpu);
+ ulong smsr = guest_msr;
+
+ /* Guest MSR values */
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_LE |
+ MSR_TM | MSR_TS_MASK;
+#else
+ smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_LE;
+#endif
+ /* Process MSR values */
+ smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
+ /* External providers the guest reserved */
+ smsr |= (guest_msr & vcpu->arch.guest_owned_ext);
+ /* 64-bit Process MSR values */
+#ifdef CONFIG_PPC_BOOK3S_64
+ smsr |= MSR_ISF | MSR_HV;
+#endif
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ /*
+ * in guest privileged state, we want to fail all TM transactions.
+ * So disable MSR TM bit so that all tbegin. will be able to be
+ * trapped into host.
+ */
+ if (!(guest_msr & MSR_PR))
+ smsr &= ~MSR_TM;
+#endif
+ vcpu->arch.shadow_msr = smsr;
+}
+
+/* Copy data touched by real-mode code from shadow vcpu back to vcpu */
+void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ ulong old_msr;
+#endif
+
+ /*
+ * Maybe we were already preempted and synced the svcpu from
+ * our preempt notifiers. Don't bother touching this svcpu then.
+ */
+ if (!svcpu->in_use)
+ goto out;
+
+ vcpu->arch.regs.gpr[0] = svcpu->gpr[0];
+ vcpu->arch.regs.gpr[1] = svcpu->gpr[1];
+ vcpu->arch.regs.gpr[2] = svcpu->gpr[2];
+ vcpu->arch.regs.gpr[3] = svcpu->gpr[3];
+ vcpu->arch.regs.gpr[4] = svcpu->gpr[4];
+ vcpu->arch.regs.gpr[5] = svcpu->gpr[5];
+ vcpu->arch.regs.gpr[6] = svcpu->gpr[6];
+ vcpu->arch.regs.gpr[7] = svcpu->gpr[7];
+ vcpu->arch.regs.gpr[8] = svcpu->gpr[8];
+ vcpu->arch.regs.gpr[9] = svcpu->gpr[9];
+ vcpu->arch.regs.gpr[10] = svcpu->gpr[10];
+ vcpu->arch.regs.gpr[11] = svcpu->gpr[11];
+ vcpu->arch.regs.gpr[12] = svcpu->gpr[12];
+ vcpu->arch.regs.gpr[13] = svcpu->gpr[13];
+ vcpu->arch.regs.ccr = svcpu->cr;
+ vcpu->arch.regs.xer = svcpu->xer;
+ vcpu->arch.regs.ctr = svcpu->ctr;
+ vcpu->arch.regs.link = svcpu->lr;
+ vcpu->arch.regs.nip = svcpu->pc;
+ vcpu->arch.shadow_srr1 = svcpu->shadow_srr1;
+ vcpu->arch.fault_dar = svcpu->fault_dar;
+ vcpu->arch.fault_dsisr = svcpu->fault_dsisr;
+ vcpu->arch.last_inst = svcpu->last_inst;
+#ifdef CONFIG_PPC_BOOK3S_64
+ vcpu->arch.shadow_fscr = svcpu->shadow_fscr;
+#endif
+ /*
+ * Update purr and spurr using time base on exit.
+ */
+ vcpu->arch.purr += get_tb() - vcpu->arch.entry_tb;
+ vcpu->arch.spurr += get_tb() - vcpu->arch.entry_tb;
+ to_book3s(vcpu)->vtb += get_vtb() - vcpu->arch.entry_vtb;
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ vcpu->arch.ic += mfspr(SPRN_IC) - vcpu->arch.entry_ic;
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ /*
+ * Unlike other MSR bits, MSR[TS]bits can be changed at guest without
+ * notifying host:
+ * modified by unprivileged instructions like "tbegin"/"tend"/
+ * "tresume"/"tsuspend" in PR KVM guest.
+ *
+ * It is necessary to sync here to calculate a correct shadow_msr.
+ *
+ * privileged guest's tbegin will be failed at present. So we
+ * only take care of problem state guest.
+ */
+ old_msr = kvmppc_get_msr(vcpu);
+ if (unlikely((old_msr & MSR_PR) &&
+ (vcpu->arch.shadow_srr1 & (MSR_TS_MASK)) !=
+ (old_msr & (MSR_TS_MASK)))) {
+ old_msr &= ~(MSR_TS_MASK);
+ old_msr |= (vcpu->arch.shadow_srr1 & (MSR_TS_MASK));
+ kvmppc_set_msr_fast(vcpu, old_msr);
+ kvmppc_recalc_shadow_msr(vcpu);
+ }
+#endif
+
+ svcpu->in_use = false;
+
+out:
+ svcpu_put(svcpu);
+}
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu)
+{
+ tm_enable();
+ vcpu->arch.tfhar = mfspr(SPRN_TFHAR);
+ vcpu->arch.texasr = mfspr(SPRN_TEXASR);
+ vcpu->arch.tfiar = mfspr(SPRN_TFIAR);
+ tm_disable();
+}
+
+void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu)
+{
+ tm_enable();
+ mtspr(SPRN_TFHAR, vcpu->arch.tfhar);
+ mtspr(SPRN_TEXASR, vcpu->arch.texasr);
+ mtspr(SPRN_TFIAR, vcpu->arch.tfiar);
+ tm_disable();
+}
+
+/* loadup math bits which is enabled at kvmppc_get_msr() but not enabled at
+ * hardware.
+ */
+static void kvmppc_handle_lost_math_exts(struct kvm_vcpu *vcpu)
+{
+ ulong exit_nr;
+ ulong ext_diff = (kvmppc_get_msr(vcpu) & ~vcpu->arch.guest_owned_ext) &
+ (MSR_FP | MSR_VEC | MSR_VSX);
+
+ if (!ext_diff)
+ return;
+
+ if (ext_diff == MSR_FP)
+ exit_nr = BOOK3S_INTERRUPT_FP_UNAVAIL;
+ else if (ext_diff == MSR_VEC)
+ exit_nr = BOOK3S_INTERRUPT_ALTIVEC;
+ else
+ exit_nr = BOOK3S_INTERRUPT_VSX;
+
+ kvmppc_handle_ext(vcpu, exit_nr, ext_diff);
+}
+
+void kvmppc_save_tm_pr(struct kvm_vcpu *vcpu)
+{
+ if (!(MSR_TM_ACTIVE(kvmppc_get_msr(vcpu)))) {
+ kvmppc_save_tm_sprs(vcpu);
+ return;
+ }
+
+ kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
+ kvmppc_giveup_ext(vcpu, MSR_VSX);
+
+ preempt_disable();
+ _kvmppc_save_tm_pr(vcpu, mfmsr());
+ preempt_enable();
+}
+
+void kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu)
+{
+ if (!MSR_TM_ACTIVE(kvmppc_get_msr(vcpu))) {
+ kvmppc_restore_tm_sprs(vcpu);
+ if (kvmppc_get_msr(vcpu) & MSR_TM) {
+ kvmppc_handle_lost_math_exts(vcpu);
+ if (vcpu->arch.fscr & FSCR_TAR)
+ kvmppc_handle_fac(vcpu, FSCR_TAR_LG);
+ }
+ return;
+ }
+
+ preempt_disable();
+ _kvmppc_restore_tm_pr(vcpu, kvmppc_get_msr(vcpu));
+ preempt_enable();
+
+ if (kvmppc_get_msr(vcpu) & MSR_TM) {
+ kvmppc_handle_lost_math_exts(vcpu);
+ if (vcpu->arch.fscr & FSCR_TAR)
+ kvmppc_handle_fac(vcpu, FSCR_TAR_LG);
+ }
+}
+#endif
+
+static int kvmppc_core_check_requests_pr(struct kvm_vcpu *vcpu)
+{
+ int r = 1; /* Indicate we want to get back into the guest */
+
+ /* We misuse TLB_FLUSH to indicate that we want to clear
+ all shadow cache entries */
+ if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
+ kvmppc_mmu_pte_flush(vcpu, 0, 0);
+
+ return r;
+}
+
+/************* MMU Notifiers *************/
+static void do_kvm_unmap_hva(struct kvm *kvm, unsigned long start,
+ unsigned long end)
+{
+ long i;
+ struct kvm_vcpu *vcpu;
+ struct kvm_memslots *slots;
+ struct kvm_memory_slot *memslot;
+
+ slots = kvm_memslots(kvm);
+ kvm_for_each_memslot(memslot, slots) {
+ unsigned long hva_start, hva_end;
+ gfn_t gfn, gfn_end;
+
+ hva_start = max(start, memslot->userspace_addr);
+ hva_end = min(end, memslot->userspace_addr +
+ (memslot->npages << PAGE_SHIFT));
+ if (hva_start >= hva_end)
+ continue;
+ /*
+ * {gfn(page) | page intersects with [hva_start, hva_end)} =
+ * {gfn, gfn+1, ..., gfn_end-1}.
+ */
+ gfn = hva_to_gfn_memslot(hva_start, memslot);
+ gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot);
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ kvmppc_mmu_pte_pflush(vcpu, gfn << PAGE_SHIFT,
+ gfn_end << PAGE_SHIFT);
+ }
+}
+
+static int kvm_unmap_hva_range_pr(struct kvm *kvm, unsigned long start,
+ unsigned long end)
+{
+ do_kvm_unmap_hva(kvm, start, end);
+
+ return 0;
+}
+
+static int kvm_age_hva_pr(struct kvm *kvm, unsigned long start,
+ unsigned long end)
+{
+ /* XXX could be more clever ;) */
+ return 0;
+}
+
+static int kvm_test_age_hva_pr(struct kvm *kvm, unsigned long hva)
+{
+ /* XXX could be more clever ;) */
+ return 0;
+}
+
+static void kvm_set_spte_hva_pr(struct kvm *kvm, unsigned long hva, pte_t pte)
+{
+ /* The page will get remapped properly on its next fault */
+ do_kvm_unmap_hva(kvm, hva, hva + PAGE_SIZE);
+}
+
+/*****************************************/
+
+static void kvmppc_set_msr_pr(struct kvm_vcpu *vcpu, u64 msr)
+{
+ ulong old_msr;
+
+ /* For PAPR guest, make sure MSR reflects guest mode */
+ if (vcpu->arch.papr_enabled)
+ msr = (msr & ~MSR_HV) | MSR_ME;
+
+#ifdef EXIT_DEBUG
+ printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
+#endif
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ /* We should never target guest MSR to TS=10 && PR=0,
+ * since we always fail transaction for guest privilege
+ * state.
+ */
+ if (!(msr & MSR_PR) && MSR_TM_TRANSACTIONAL(msr))
+ kvmppc_emulate_tabort(vcpu,
+ TM_CAUSE_KVM_FAC_UNAV | TM_CAUSE_PERSISTENT);
+#endif
+
+ old_msr = kvmppc_get_msr(vcpu);
+ msr &= to_book3s(vcpu)->msr_mask;
+ kvmppc_set_msr_fast(vcpu, msr);
+ kvmppc_recalc_shadow_msr(vcpu);
+
+ if (msr & MSR_POW) {
+ if (!vcpu->arch.pending_exceptions) {
+ kvm_vcpu_block(vcpu);
+ kvm_clear_request(KVM_REQ_UNHALT, vcpu);
+ vcpu->stat.halt_wakeup++;
+
+ /* Unset POW bit after we woke up */
+ msr &= ~MSR_POW;
+ kvmppc_set_msr_fast(vcpu, msr);
+ }
+ }
+
+ if (kvmppc_is_split_real(vcpu))
+ kvmppc_fixup_split_real(vcpu);
+ else
+ kvmppc_unfixup_split_real(vcpu);
+
+ if ((kvmppc_get_msr(vcpu) & (MSR_PR|MSR_IR|MSR_DR)) !=
+ (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
+ kvmppc_mmu_flush_segments(vcpu);
+ kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
+
+ /* Preload magic page segment when in kernel mode */
+ if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
+ struct kvm_vcpu_arch *a = &vcpu->arch;
+
+ if (msr & MSR_DR)
+ kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
+ else
+ kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
+ }
+ }
+
+ /*
+ * When switching from 32 to 64-bit, we may have a stale 32-bit
+ * magic page around, we need to flush it. Typically 32-bit magic
+ * page will be instantiated when calling into RTAS. Note: We
+ * assume that such transition only happens while in kernel mode,
+ * ie, we never transition from user 32-bit to kernel 64-bit with
+ * a 32-bit magic page around.
+ */
+ if (vcpu->arch.magic_page_pa &&
+ !(old_msr & MSR_PR) && !(old_msr & MSR_SF) && (msr & MSR_SF)) {
+ /* going from RTAS to normal kernel code */
+ kvmppc_mmu_pte_flush(vcpu, (uint32_t)vcpu->arch.magic_page_pa,
+ ~0xFFFUL);
+ }
+
+ /* Preload FPU if it's enabled */
+ if (kvmppc_get_msr(vcpu) & MSR_FP)
+ kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ if (kvmppc_get_msr(vcpu) & MSR_TM)
+ kvmppc_handle_lost_math_exts(vcpu);
+#endif
+}
+
+static void kvmppc_set_pvr_pr(struct kvm_vcpu *vcpu, u32 pvr)
+{
+ u32 host_pvr;
+
+ vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
+ vcpu->arch.pvr = pvr;
+#ifdef CONFIG_PPC_BOOK3S_64
+ if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
+ kvmppc_mmu_book3s_64_init(vcpu);
+ if (!to_book3s(vcpu)->hior_explicit)
+ to_book3s(vcpu)->hior = 0xfff00000;
+ to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
+ vcpu->arch.cpu_type = KVM_CPU_3S_64;
+ } else
+#endif
+ {
+ kvmppc_mmu_book3s_32_init(vcpu);
+ if (!to_book3s(vcpu)->hior_explicit)
+ to_book3s(vcpu)->hior = 0;
+ to_book3s(vcpu)->msr_mask = 0xffffffffULL;
+ vcpu->arch.cpu_type = KVM_CPU_3S_32;
+ }
+
+ kvmppc_sanity_check(vcpu);
+
+ /* If we are in hypervisor level on 970, we can tell the CPU to
+ * treat DCBZ as 32 bytes store */
+ vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
+ if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
+ !strcmp(cur_cpu_spec->platform, "ppc970"))
+ vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
+
+ /* Cell performs badly if MSR_FEx are set. So let's hope nobody
+ really needs them in a VM on Cell and force disable them. */
+ if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
+ to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
+
+ /*
+ * If they're asking for POWER6 or later, set the flag
+ * indicating that we can do multiple large page sizes
+ * and 1TB segments.
+ * Also set the flag that indicates that tlbie has the large
+ * page bit in the RB operand instead of the instruction.
+ */
+ switch (PVR_VER(pvr)) {
+ case PVR_POWER6:
+ case PVR_POWER7:
+ case PVR_POWER7p:
+ case PVR_POWER8:
+ case PVR_POWER8E:
+ case PVR_POWER8NVL:
+ case PVR_POWER9:
+ vcpu->arch.hflags |= BOOK3S_HFLAG_MULTI_PGSIZE |
+ BOOK3S_HFLAG_NEW_TLBIE;
+ break;
+ }
+
+#ifdef CONFIG_PPC_BOOK3S_32
+ /* 32 bit Book3S always has 32 byte dcbz */
+ vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
+#endif
+
+ /* On some CPUs we can execute paired single operations natively */
+ asm ( "mfpvr %0" : "=r"(host_pvr));
+ switch (host_pvr) {
+ case 0x00080200: /* lonestar 2.0 */
+ case 0x00088202: /* lonestar 2.2 */
+ case 0x70000100: /* gekko 1.0 */
+ case 0x00080100: /* gekko 2.0 */
+ case 0x00083203: /* gekko 2.3a */
+ case 0x00083213: /* gekko 2.3b */
+ case 0x00083204: /* gekko 2.4 */
+ case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
+ case 0x00087200: /* broadway */
+ vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
+ /* Enable HID2.PSE - in case we need it later */
+ mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
+ }
+}
+
+/* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
+ * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
+ * emulate 32 bytes dcbz length.
+ *
+ * The Book3s_64 inventors also realized this case and implemented a special bit
+ * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
+ *
+ * My approach here is to patch the dcbz instruction on executing pages.
+ */
+static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
+{
+ struct page *hpage;
+ u64 hpage_offset;
+ u32 *page;
+ int i;
+
+ hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
+ if (is_error_page(hpage))
+ return;
+
+ hpage_offset = pte->raddr & ~PAGE_MASK;
+ hpage_offset &= ~0xFFFULL;
+ hpage_offset /= 4;
+
+ get_page(hpage);
+ page = kmap_atomic(hpage);
+
+ /* patch dcbz into reserved instruction, so we trap */
+ for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
+ if ((be32_to_cpu(page[i]) & 0xff0007ff) == INS_DCBZ)
+ page[i] &= cpu_to_be32(0xfffffff7);
+
+ kunmap_atomic(page);
+ put_page(hpage);
+}
+
+static bool kvmppc_visible_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
+{
+ ulong mp_pa = vcpu->arch.magic_page_pa;
+
+ if (!(kvmppc_get_msr(vcpu) & MSR_SF))
+ mp_pa = (uint32_t)mp_pa;
+
+ gpa &= ~0xFFFULL;
+ if (unlikely(mp_pa) && unlikely((mp_pa & KVM_PAM) == (gpa & KVM_PAM))) {
+ return true;
+ }
+
+ return kvm_is_visible_gfn(vcpu->kvm, gpa >> PAGE_SHIFT);
+}
+
+static int kvmppc_handle_pagefault(struct kvm_vcpu *vcpu,
+ ulong eaddr, int vec)
+{
+ bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
+ bool iswrite = false;
+ int r = RESUME_GUEST;
+ int relocated;
+ int page_found = 0;
+ struct kvmppc_pte pte = { 0 };
+ bool dr = (kvmppc_get_msr(vcpu) & MSR_DR) ? true : false;
+ bool ir = (kvmppc_get_msr(vcpu) & MSR_IR) ? true : false;
+ u64 vsid;
+
+ relocated = data ? dr : ir;
+ if (data && (vcpu->arch.fault_dsisr & DSISR_ISSTORE))
+ iswrite = true;
+
+ /* Resolve real address if translation turned on */
+ if (relocated) {
+ page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data, iswrite);
+ } else {
+ pte.may_execute = true;
+ pte.may_read = true;
+ pte.may_write = true;
+ pte.raddr = eaddr & KVM_PAM;
+ pte.eaddr = eaddr;
+ pte.vpage = eaddr >> 12;
+ pte.page_size = MMU_PAGE_64K;
+ pte.wimg = HPTE_R_M;
+ }
+
+ switch (kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) {
+ case 0:
+ pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
+ break;
+ case MSR_DR:
+ if (!data &&
+ (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
+ ((pte.raddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
+ pte.raddr &= ~SPLIT_HACK_MASK;
+ fallthrough;
+ case MSR_IR:
+ vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
+
+ if ((kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) == MSR_DR)
+ pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
+ else
+ pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
+ pte.vpage |= vsid;
+
+ if (vsid == -1)
+ page_found = -EINVAL;
+ break;
+ }
+
+ if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
+ (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
+ /*
+ * If we do the dcbz hack, we have to NX on every execution,
+ * so we can patch the executing code. This renders our guest
+ * NX-less.
+ */
+ pte.may_execute = !data;
+ }
+
+ if (page_found == -ENOENT || page_found == -EPERM) {
+ /* Page not found in guest PTE entries, or protection fault */
+ u64 flags;
+
+ if (page_found == -EPERM)
+ flags = DSISR_PROTFAULT;
+ else
+ flags = DSISR_NOHPTE;
+ if (data) {
+ flags |= vcpu->arch.fault_dsisr & DSISR_ISSTORE;
+ kvmppc_core_queue_data_storage(vcpu, eaddr, flags);
+ } else {
+ kvmppc_core_queue_inst_storage(vcpu, flags);
+ }
+ } else if (page_found == -EINVAL) {
+ /* Page not found in guest SLB */
+ kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
+ kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
+ } else if (kvmppc_visible_gpa(vcpu, pte.raddr)) {
+ if (data && !(vcpu->arch.fault_dsisr & DSISR_NOHPTE)) {
+ /*
+ * There is already a host HPTE there, presumably
+ * a read-only one for a page the guest thinks
+ * is writable, so get rid of it first.
+ */
+ kvmppc_mmu_unmap_page(vcpu, &pte);
+ }
+ /* The guest's PTE is not mapped yet. Map on the host */
+ if (kvmppc_mmu_map_page(vcpu, &pte, iswrite) == -EIO) {
+ /* Exit KVM if mapping failed */
+ vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+ return RESUME_HOST;
+ }
+ if (data)
+ vcpu->stat.sp_storage++;
+ else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
+ (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
+ kvmppc_patch_dcbz(vcpu, &pte);
+ } else {
+ /* MMIO */
+ vcpu->stat.mmio_exits++;
+ vcpu->arch.paddr_accessed = pte.raddr;
+ vcpu->arch.vaddr_accessed = pte.eaddr;
+ r = kvmppc_emulate_mmio(vcpu);
+ if ( r == RESUME_HOST_NV )
+ r = RESUME_HOST;
+ }
+
+ return r;
+}
+
+/* Give up external provider (FPU, Altivec, VSX) */
+void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
+{
+ struct thread_struct *t = &current->thread;
+
+ /*
+ * VSX instructions can access FP and vector registers, so if
+ * we are giving up VSX, make sure we give up FP and VMX as well.
+ */
+ if (msr & MSR_VSX)
+ msr |= MSR_FP | MSR_VEC;
+
+ msr &= vcpu->arch.guest_owned_ext;
+ if (!msr)
+ return;
+
+#ifdef DEBUG_EXT
+ printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
+#endif
+
+ if (msr & MSR_FP) {
+ /*
+ * Note that on CPUs with VSX, giveup_fpu stores
+ * both the traditional FP registers and the added VSX
+ * registers into thread.fp_state.fpr[].
+ */
+ if (t->regs->msr & MSR_FP)
+ giveup_fpu(current);
+ t->fp_save_area = NULL;
+ }
+
+#ifdef CONFIG_ALTIVEC
+ if (msr & MSR_VEC) {
+ if (current->thread.regs->msr & MSR_VEC)
+ giveup_altivec(current);
+ t->vr_save_area = NULL;
+ }
+#endif
+
+ vcpu->arch.guest_owned_ext &= ~(msr | MSR_VSX);
+ kvmppc_recalc_shadow_msr(vcpu);
+}
+
+/* Give up facility (TAR / EBB / DSCR) */
+void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac)
+{
+#ifdef CONFIG_PPC_BOOK3S_64
+ if (!(vcpu->arch.shadow_fscr & (1ULL << fac))) {
+ /* Facility not available to the guest, ignore giveup request*/
+ return;
+ }
+
+ switch (fac) {
+ case FSCR_TAR_LG:
+ vcpu->arch.tar = mfspr(SPRN_TAR);
+ mtspr(SPRN_TAR, current->thread.tar);
+ vcpu->arch.shadow_fscr &= ~FSCR_TAR;
+ break;
+ }
+#endif
+}
+
+/* Handle external providers (FPU, Altivec, VSX) */
+static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
+ ulong msr)
+{
+ struct thread_struct *t = &current->thread;
+
+ /* When we have paired singles, we emulate in software */
+ if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
+ return RESUME_GUEST;
+
+ if (!(kvmppc_get_msr(vcpu) & msr)) {
+ kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
+ return RESUME_GUEST;
+ }
+
+ if (msr == MSR_VSX) {
+ /* No VSX? Give an illegal instruction interrupt */
+#ifdef CONFIG_VSX
+ if (!cpu_has_feature(CPU_FTR_VSX))
+#endif
+ {
+ kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
+ return RESUME_GUEST;
+ }
+
+ /*
+ * We have to load up all the FP and VMX registers before
+ * we can let the guest use VSX instructions.
+ */
+ msr = MSR_FP | MSR_VEC | MSR_VSX;
+ }
+
+ /* See if we already own all the ext(s) needed */
+ msr &= ~vcpu->arch.guest_owned_ext;
+ if (!msr)
+ return RESUME_GUEST;
+
+#ifdef DEBUG_EXT
+ printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
+#endif
+
+ if (msr & MSR_FP) {
+ preempt_disable();
+ enable_kernel_fp();
+ load_fp_state(&vcpu->arch.fp);
+ disable_kernel_fp();
+ t->fp_save_area = &vcpu->arch.fp;
+ preempt_enable();
+ }
+
+ if (msr & MSR_VEC) {
+#ifdef CONFIG_ALTIVEC
+ preempt_disable();
+ enable_kernel_altivec();
+ load_vr_state(&vcpu->arch.vr);
+ disable_kernel_altivec();
+ t->vr_save_area = &vcpu->arch.vr;
+ preempt_enable();
+#endif
+ }
+
+ t->regs->msr |= msr;
+ vcpu->arch.guest_owned_ext |= msr;
+ kvmppc_recalc_shadow_msr(vcpu);
+
+ return RESUME_GUEST;
+}
+
+/*
+ * Kernel code using FP or VMX could have flushed guest state to
+ * the thread_struct; if so, get it back now.
+ */
+static void kvmppc_handle_lost_ext(struct kvm_vcpu *vcpu)
+{
+ unsigned long lost_ext;
+
+ lost_ext = vcpu->arch.guest_owned_ext & ~current->thread.regs->msr;
+ if (!lost_ext)
+ return;
+
+ if (lost_ext & MSR_FP) {
+ preempt_disable();
+ enable_kernel_fp();
+ load_fp_state(&vcpu->arch.fp);
+ disable_kernel_fp();
+ preempt_enable();
+ }
+#ifdef CONFIG_ALTIVEC
+ if (lost_ext & MSR_VEC) {
+ preempt_disable();
+ enable_kernel_altivec();
+ load_vr_state(&vcpu->arch.vr);
+ disable_kernel_altivec();
+ preempt_enable();
+ }
+#endif
+ current->thread.regs->msr |= lost_ext;
+}
+
+#ifdef CONFIG_PPC_BOOK3S_64
+
+void kvmppc_trigger_fac_interrupt(struct kvm_vcpu *vcpu, ulong fac)
+{
+ /* Inject the Interrupt Cause field and trigger a guest interrupt */
+ vcpu->arch.fscr &= ~(0xffULL << 56);
+ vcpu->arch.fscr |= (fac << 56);
+ kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_FAC_UNAVAIL);
+}
+
+static void kvmppc_emulate_fac(struct kvm_vcpu *vcpu, ulong fac)
+{
+ enum emulation_result er = EMULATE_FAIL;
+
+ if (!(kvmppc_get_msr(vcpu) & MSR_PR))
+ er = kvmppc_emulate_instruction(vcpu);
+
+ if ((er != EMULATE_DONE) && (er != EMULATE_AGAIN)) {
+ /* Couldn't emulate, trigger interrupt in guest */
+ kvmppc_trigger_fac_interrupt(vcpu, fac);
+ }
+}
+
+/* Enable facilities (TAR, EBB, DSCR) for the guest */
+static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac)
+{
+ bool guest_fac_enabled;
+ BUG_ON(!cpu_has_feature(CPU_FTR_ARCH_207S));
+
+ /*
+ * Not every facility is enabled by FSCR bits, check whether the
+ * guest has this facility enabled at all.
+ */
+ switch (fac) {
+ case FSCR_TAR_LG:
+ case FSCR_EBB_LG:
+ guest_fac_enabled = (vcpu->arch.fscr & (1ULL << fac));
+ break;
+ case FSCR_TM_LG:
+ guest_fac_enabled = kvmppc_get_msr(vcpu) & MSR_TM;
+ break;
+ default:
+ guest_fac_enabled = false;
+ break;
+ }
+
+ if (!guest_fac_enabled) {
+ /* Facility not enabled by the guest */
+ kvmppc_trigger_fac_interrupt(vcpu, fac);
+ return RESUME_GUEST;
+ }
+
+ switch (fac) {
+ case FSCR_TAR_LG:
+ /* TAR switching isn't lazy in Linux yet */
+ current->thread.tar = mfspr(SPRN_TAR);
+ mtspr(SPRN_TAR, vcpu->arch.tar);
+ vcpu->arch.shadow_fscr |= FSCR_TAR;
+ break;
+ default:
+ kvmppc_emulate_fac(vcpu, fac);
+ break;
+ }
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ /* Since we disabled MSR_TM at privilege state, the mfspr instruction
+ * for TM spr can trigger TM fac unavailable. In this case, the
+ * emulation is handled by kvmppc_emulate_fac(), which invokes
+ * kvmppc_emulate_mfspr() finally. But note the mfspr can include
+ * RT for NV registers. So it need to restore those NV reg to reflect
+ * the update.
+ */
+ if ((fac == FSCR_TM_LG) && !(kvmppc_get_msr(vcpu) & MSR_PR))
+ return RESUME_GUEST_NV;
+#endif
+
+ return RESUME_GUEST;
+}
+
+void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr)
+{
+ if ((vcpu->arch.fscr & FSCR_TAR) && !(fscr & FSCR_TAR)) {
+ /* TAR got dropped, drop it in shadow too */
+ kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
+ } else if (!(vcpu->arch.fscr & FSCR_TAR) && (fscr & FSCR_TAR)) {
+ vcpu->arch.fscr = fscr;
+ kvmppc_handle_fac(vcpu, FSCR_TAR_LG);
+ return;
+ }
+
+ vcpu->arch.fscr = fscr;
+}
+#endif
+
+static void kvmppc_setup_debug(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
+ u64 msr = kvmppc_get_msr(vcpu);
+
+ kvmppc_set_msr(vcpu, msr | MSR_SE);
+ }
+}
+
+static void kvmppc_clear_debug(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
+ u64 msr = kvmppc_get_msr(vcpu);
+
+ kvmppc_set_msr(vcpu, msr & ~MSR_SE);
+ }
+}
+
+static int kvmppc_exit_pr_progint(struct kvm_vcpu *vcpu, unsigned int exit_nr)
+{
+ enum emulation_result er;
+ ulong flags;
+ u32 last_inst;
+ int emul, r;
+
+ /*
+ * shadow_srr1 only contains valid flags if we came here via a program
+ * exception. The other exceptions (emulation assist, FP unavailable,
+ * etc.) do not provide flags in SRR1, so use an illegal-instruction
+ * exception when injecting a program interrupt into the guest.
+ */
+ if (exit_nr == BOOK3S_INTERRUPT_PROGRAM)
+ flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
+ else
+ flags = SRR1_PROGILL;
+
+ emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
+ if (emul != EMULATE_DONE)
+ return RESUME_GUEST;
+
+ if (kvmppc_get_msr(vcpu) & MSR_PR) {
+#ifdef EXIT_DEBUG
+ pr_info("Userspace triggered 0x700 exception at\n 0x%lx (0x%x)\n",
+ kvmppc_get_pc(vcpu), last_inst);
+#endif
+ if ((last_inst & 0xff0007ff) != (INS_DCBZ & 0xfffffff7)) {
+ kvmppc_core_queue_program(vcpu, flags);
+ return RESUME_GUEST;
+ }
+ }
+
+ vcpu->stat.emulated_inst_exits++;
+ er = kvmppc_emulate_instruction(vcpu);
+ switch (er) {
+ case EMULATE_DONE:
+ r = RESUME_GUEST_NV;
+ break;
+ case EMULATE_AGAIN:
+ r = RESUME_GUEST;
+ break;
+ case EMULATE_FAIL:
+ pr_crit("%s: emulation at %lx failed (%08x)\n",
+ __func__, kvmppc_get_pc(vcpu), last_inst);
+ kvmppc_core_queue_program(vcpu, flags);
+ r = RESUME_GUEST;
+ break;
+ case EMULATE_DO_MMIO:
+ vcpu->run->exit_reason = KVM_EXIT_MMIO;
+ r = RESUME_HOST_NV;
+ break;
+ case EMULATE_EXIT_USER:
+ r = RESUME_HOST_NV;
+ break;
+ default:
+ BUG();
+ }
+
+ return r;
+}
+
+int kvmppc_handle_exit_pr(struct kvm_vcpu *vcpu, unsigned int exit_nr)
+{
+ struct kvm_run *run = vcpu->run;
+ int r = RESUME_HOST;
+ int s;
+
+ vcpu->stat.sum_exits++;
+
+ run->exit_reason = KVM_EXIT_UNKNOWN;
+ run->ready_for_interrupt_injection = 1;
+
+ /* We get here with MSR.EE=1 */
+
+ trace_kvm_exit(exit_nr, vcpu);
+ guest_exit();
+
+ switch (exit_nr) {
+ case BOOK3S_INTERRUPT_INST_STORAGE:
+ {
+ ulong shadow_srr1 = vcpu->arch.shadow_srr1;
+ vcpu->stat.pf_instruc++;
+
+ if (kvmppc_is_split_real(vcpu))
+ kvmppc_fixup_split_real(vcpu);
+
+#ifdef CONFIG_PPC_BOOK3S_32
+ /* We set segments as unused segments when invalidating them. So
+ * treat the respective fault as segment fault. */
+ {
+ struct kvmppc_book3s_shadow_vcpu *svcpu;
+ u32 sr;
+
+ svcpu = svcpu_get(vcpu);
+ sr = svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT];
+ svcpu_put(svcpu);
+ if (sr == SR_INVALID) {
+ kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
+ r = RESUME_GUEST;
+ break;
+ }
+ }
+#endif
+
+ /* only care about PTEG not found errors, but leave NX alone */
+ if (shadow_srr1 & 0x40000000) {
+ int idx = srcu_read_lock(&vcpu->kvm->srcu);
+ r = kvmppc_handle_pagefault(vcpu, kvmppc_get_pc(vcpu), exit_nr);
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
+ vcpu->stat.sp_instruc++;
+ } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
+ (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
+ /*
+ * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
+ * so we can't use the NX bit inside the guest. Let's cross our fingers,
+ * that no guest that needs the dcbz hack does NX.
+ */
+ kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
+ r = RESUME_GUEST;
+ } else {
+ kvmppc_core_queue_inst_storage(vcpu,
+ shadow_srr1 & 0x58000000);
+ r = RESUME_GUEST;
+ }
+ break;
+ }
+ case BOOK3S_INTERRUPT_DATA_STORAGE:
+ {
+ ulong dar = kvmppc_get_fault_dar(vcpu);
+ u32 fault_dsisr = vcpu->arch.fault_dsisr;
+ vcpu->stat.pf_storage++;
+
+#ifdef CONFIG_PPC_BOOK3S_32
+ /* We set segments as unused segments when invalidating them. So
+ * treat the respective fault as segment fault. */
+ {
+ struct kvmppc_book3s_shadow_vcpu *svcpu;
+ u32 sr;
+
+ svcpu = svcpu_get(vcpu);
+ sr = svcpu->sr[dar >> SID_SHIFT];
+ svcpu_put(svcpu);
+ if (sr == SR_INVALID) {
+ kvmppc_mmu_map_segment(vcpu, dar);
+ r = RESUME_GUEST;
+ break;
+ }
+ }
+#endif
+
+ /*
+ * We need to handle missing shadow PTEs, and
+ * protection faults due to us mapping a page read-only
+ * when the guest thinks it is writable.
+ */
+ if (fault_dsisr & (DSISR_NOHPTE | DSISR_PROTFAULT)) {
+ int idx = srcu_read_lock(&vcpu->kvm->srcu);
+ r = kvmppc_handle_pagefault(vcpu, dar, exit_nr);
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
+ } else {
+ kvmppc_core_queue_data_storage(vcpu, dar, fault_dsisr);
+ r = RESUME_GUEST;
+ }
+ break;
+ }
+ case BOOK3S_INTERRUPT_DATA_SEGMENT:
+ if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
+ kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
+ kvmppc_book3s_queue_irqprio(vcpu,
+ BOOK3S_INTERRUPT_DATA_SEGMENT);
+ }
+ r = RESUME_GUEST;
+ break;
+ case BOOK3S_INTERRUPT_INST_SEGMENT:
+ if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
+ kvmppc_book3s_queue_irqprio(vcpu,
+ BOOK3S_INTERRUPT_INST_SEGMENT);
+ }
+ r = RESUME_GUEST;
+ break;
+ /* We're good on these - the host merely wanted to get our attention */
+ case BOOK3S_INTERRUPT_DECREMENTER:
+ case BOOK3S_INTERRUPT_HV_DECREMENTER:
+ case BOOK3S_INTERRUPT_DOORBELL:
+ case BOOK3S_INTERRUPT_H_DOORBELL:
+ vcpu->stat.dec_exits++;
+ r = RESUME_GUEST;
+ break;
+ case BOOK3S_INTERRUPT_EXTERNAL:
+ case BOOK3S_INTERRUPT_EXTERNAL_HV:
+ case BOOK3S_INTERRUPT_H_VIRT:
+ vcpu->stat.ext_intr_exits++;
+ r = RESUME_GUEST;
+ break;
+ case BOOK3S_INTERRUPT_HMI:
+ case BOOK3S_INTERRUPT_PERFMON:
+ case BOOK3S_INTERRUPT_SYSTEM_RESET:
+ r = RESUME_GUEST;
+ break;
+ case BOOK3S_INTERRUPT_PROGRAM:
+ case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
+ r = kvmppc_exit_pr_progint(vcpu, exit_nr);
+ break;
+ case BOOK3S_INTERRUPT_SYSCALL:
+ {
+ u32 last_sc;
+ int emul;
+
+ /* Get last sc for papr */
+ if (vcpu->arch.papr_enabled) {
+ /* The sc instuction points SRR0 to the next inst */
+ emul = kvmppc_get_last_inst(vcpu, INST_SC, &last_sc);
+ if (emul != EMULATE_DONE) {
+ kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) - 4);
+ r = RESUME_GUEST;
+ break;
+ }
+ }
+
+ if (vcpu->arch.papr_enabled &&
+ (last_sc == 0x44000022) &&
+ !(kvmppc_get_msr(vcpu) & MSR_PR)) {
+ /* SC 1 papr hypercalls */
+ ulong cmd = kvmppc_get_gpr(vcpu, 3);
+ int i;
+
+#ifdef CONFIG_PPC_BOOK3S_64
+ if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
+ r = RESUME_GUEST;
+ break;
+ }
+#endif
+
+ run->papr_hcall.nr = cmd;
+ for (i = 0; i < 9; ++i) {
+ ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
+ run->papr_hcall.args[i] = gpr;
+ }
+ run->exit_reason = KVM_EXIT_PAPR_HCALL;
+ vcpu->arch.hcall_needed = 1;
+ r = RESUME_HOST;
+ } else if (vcpu->arch.osi_enabled &&
+ (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
+ (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
+ /* MOL hypercalls */
+ u64 *gprs = run->osi.gprs;
+ int i;
+
+ run->exit_reason = KVM_EXIT_OSI;
+ for (i = 0; i < 32; i++)
+ gprs[i] = kvmppc_get_gpr(vcpu, i);
+ vcpu->arch.osi_needed = 1;
+ r = RESUME_HOST_NV;
+ } else if (!(kvmppc_get_msr(vcpu) & MSR_PR) &&
+ (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
+ /* KVM PV hypercalls */
+ kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
+ r = RESUME_GUEST;
+ } else {
+ /* Guest syscalls */
+ vcpu->stat.syscall_exits++;
+ kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
+ r = RESUME_GUEST;
+ }
+ break;
+ }
+ case BOOK3S_INTERRUPT_FP_UNAVAIL:
+ case BOOK3S_INTERRUPT_ALTIVEC:
+ case BOOK3S_INTERRUPT_VSX:
+ {
+ int ext_msr = 0;
+ int emul;
+ u32 last_inst;
+
+ if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE) {
+ /* Do paired single instruction emulation */
+ emul = kvmppc_get_last_inst(vcpu, INST_GENERIC,
+ &last_inst);
+ if (emul == EMULATE_DONE)
+ r = kvmppc_exit_pr_progint(vcpu, exit_nr);
+ else
+ r = RESUME_GUEST;
+
+ break;
+ }
+
+ /* Enable external provider */
+ switch (exit_nr) {
+ case BOOK3S_INTERRUPT_FP_UNAVAIL:
+ ext_msr = MSR_FP;
+ break;
+
+ case BOOK3S_INTERRUPT_ALTIVEC:
+ ext_msr = MSR_VEC;
+ break;
+
+ case BOOK3S_INTERRUPT_VSX:
+ ext_msr = MSR_VSX;
+ break;
+ }
+
+ r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
+ break;
+ }
+ case BOOK3S_INTERRUPT_ALIGNMENT:
+ {
+ u32 last_inst;
+ int emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
+
+ if (emul == EMULATE_DONE) {
+ u32 dsisr;
+ u64 dar;
+
+ dsisr = kvmppc_alignment_dsisr(vcpu, last_inst);
+ dar = kvmppc_alignment_dar(vcpu, last_inst);
+
+ kvmppc_set_dsisr(vcpu, dsisr);
+ kvmppc_set_dar(vcpu, dar);
+
+ kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
+ }
+ r = RESUME_GUEST;
+ break;
+ }
+#ifdef CONFIG_PPC_BOOK3S_64
+ case BOOK3S_INTERRUPT_FAC_UNAVAIL:
+ r = kvmppc_handle_fac(vcpu, vcpu->arch.shadow_fscr >> 56);
+ break;
+#endif
+ case BOOK3S_INTERRUPT_MACHINE_CHECK:
+ kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
+ r = RESUME_GUEST;
+ break;
+ case BOOK3S_INTERRUPT_TRACE:
+ if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
+ run->exit_reason = KVM_EXIT_DEBUG;
+ r = RESUME_HOST;
+ } else {
+ kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
+ r = RESUME_GUEST;
+ }
+ break;
+ default:
+ {
+ ulong shadow_srr1 = vcpu->arch.shadow_srr1;
+ /* Ugh - bork here! What did we get? */
+ printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
+ exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
+ r = RESUME_HOST;
+ BUG();
+ break;
+ }
+ }
+
+ 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. */
+
+ /*
+ * Interrupts could be timers for the guest which we have to
+ * inject again, so let's postpone them until we're in the guest
+ * and if we really did time things so badly, then we just exit
+ * again due to a host external interrupt.
+ */
+ s = kvmppc_prepare_to_enter(vcpu);
+ if (s <= 0)
+ r = s;
+ else {
+ /* interrupts now hard-disabled */
+ kvmppc_fix_ee_before_entry();
+ }
+
+ kvmppc_handle_lost_ext(vcpu);
+ }
+
+ trace_kvm_book3s_reenter(r, vcpu);
+
+ return r;
+}
+
+static int kvm_arch_vcpu_ioctl_get_sregs_pr(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
+{
+ struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
+ int i;
+
+ sregs->pvr = vcpu->arch.pvr;
+
+ sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
+ if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
+ for (i = 0; i < 64; i++) {
+ sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
+ sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
+ }
+ } else {
+ for (i = 0; i < 16; i++)
+ sregs->u.s.ppc32.sr[i] = kvmppc_get_sr(vcpu, i);
+
+ for (i = 0; i < 8; i++) {
+ sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
+ sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
+ }
+ }
+
+ return 0;
+}
+
+static int kvm_arch_vcpu_ioctl_set_sregs_pr(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
+{
+ struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
+ int i;
+
+ kvmppc_set_pvr_pr(vcpu, sregs->pvr);
+
+ vcpu3s->sdr1 = sregs->u.s.sdr1;
+#ifdef CONFIG_PPC_BOOK3S_64
+ if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
+ /* Flush all SLB entries */
+ vcpu->arch.mmu.slbmte(vcpu, 0, 0);
+ vcpu->arch.mmu.slbia(vcpu);
+
+ for (i = 0; i < 64; i++) {
+ u64 rb = sregs->u.s.ppc64.slb[i].slbe;
+ u64 rs = sregs->u.s.ppc64.slb[i].slbv;
+
+ if (rb & SLB_ESID_V)
+ vcpu->arch.mmu.slbmte(vcpu, rs, rb);
+ }
+ } else
+#endif
+ {
+ for (i = 0; i < 16; i++) {
+ vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
+ }
+ for (i = 0; i < 8; i++) {
+ kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
+ (u32)sregs->u.s.ppc32.ibat[i]);
+ kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
+ (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
+ kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
+ (u32)sregs->u.s.ppc32.dbat[i]);
+ kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
+ (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
+ }
+ }
+
+ /* Flush the MMU after messing with the segments */
+ kvmppc_mmu_pte_flush(vcpu, 0, 0);
+
+ return 0;
+}
+
+static int kvmppc_get_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
+ union kvmppc_one_reg *val)
+{
+ int r = 0;
+
+ switch (id) {
+ case KVM_REG_PPC_DEBUG_INST:
+ *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
+ break;
+ case KVM_REG_PPC_HIOR:
+ *val = get_reg_val(id, to_book3s(vcpu)->hior);
+ break;
+ case KVM_REG_PPC_VTB:
+ *val = get_reg_val(id, to_book3s(vcpu)->vtb);
+ break;
+ case KVM_REG_PPC_LPCR:
+ case KVM_REG_PPC_LPCR_64:
+ /*
+ * We are only interested in the LPCR_ILE bit
+ */
+ if (vcpu->arch.intr_msr & MSR_LE)
+ *val = get_reg_val(id, LPCR_ILE);
+ else
+ *val = get_reg_val(id, 0);
+ break;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ case KVM_REG_PPC_TFHAR:
+ *val = get_reg_val(id, vcpu->arch.tfhar);
+ break;
+ case KVM_REG_PPC_TFIAR:
+ *val = get_reg_val(id, vcpu->arch.tfiar);
+ break;
+ case KVM_REG_PPC_TEXASR:
+ *val = get_reg_val(id, vcpu->arch.texasr);
+ break;
+ case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
+ *val = get_reg_val(id,
+ vcpu->arch.gpr_tm[id-KVM_REG_PPC_TM_GPR0]);
+ break;
+ case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
+ {
+ int i, j;
+
+ i = id - KVM_REG_PPC_TM_VSR0;
+ if (i < 32)
+ for (j = 0; j < TS_FPRWIDTH; j++)
+ val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j];
+ else {
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ val->vval = vcpu->arch.vr_tm.vr[i-32];
+ else
+ r = -ENXIO;
+ }
+ break;
+ }
+ case KVM_REG_PPC_TM_CR:
+ *val = get_reg_val(id, vcpu->arch.cr_tm);
+ break;
+ case KVM_REG_PPC_TM_XER:
+ *val = get_reg_val(id, vcpu->arch.xer_tm);
+ break;
+ case KVM_REG_PPC_TM_LR:
+ *val = get_reg_val(id, vcpu->arch.lr_tm);
+ break;
+ case KVM_REG_PPC_TM_CTR:
+ *val = get_reg_val(id, vcpu->arch.ctr_tm);
+ break;
+ case KVM_REG_PPC_TM_FPSCR:
+ *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr);
+ break;
+ case KVM_REG_PPC_TM_AMR:
+ *val = get_reg_val(id, vcpu->arch.amr_tm);
+ break;
+ case KVM_REG_PPC_TM_PPR:
+ *val = get_reg_val(id, vcpu->arch.ppr_tm);
+ break;
+ case KVM_REG_PPC_TM_VRSAVE:
+ *val = get_reg_val(id, vcpu->arch.vrsave_tm);
+ break;
+ case KVM_REG_PPC_TM_VSCR:
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]);
+ else
+ r = -ENXIO;
+ break;
+ case KVM_REG_PPC_TM_DSCR:
+ *val = get_reg_val(id, vcpu->arch.dscr_tm);
+ break;
+ case KVM_REG_PPC_TM_TAR:
+ *val = get_reg_val(id, vcpu->arch.tar_tm);
+ break;
+#endif
+ default:
+ r = -EINVAL;
+ break;
+ }
+
+ return r;
+}
+
+static void kvmppc_set_lpcr_pr(struct kvm_vcpu *vcpu, u64 new_lpcr)
+{
+ if (new_lpcr & LPCR_ILE)
+ vcpu->arch.intr_msr |= MSR_LE;
+ else
+ vcpu->arch.intr_msr &= ~MSR_LE;
+}
+
+static int kvmppc_set_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
+ union kvmppc_one_reg *val)
+{
+ int r = 0;
+
+ switch (id) {
+ case KVM_REG_PPC_HIOR:
+ to_book3s(vcpu)->hior = set_reg_val(id, *val);
+ to_book3s(vcpu)->hior_explicit = true;
+ break;
+ case KVM_REG_PPC_VTB:
+ to_book3s(vcpu)->vtb = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_LPCR:
+ case KVM_REG_PPC_LPCR_64:
+ kvmppc_set_lpcr_pr(vcpu, set_reg_val(id, *val));
+ break;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ case KVM_REG_PPC_TFHAR:
+ vcpu->arch.tfhar = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TFIAR:
+ vcpu->arch.tfiar = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TEXASR:
+ vcpu->arch.texasr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31:
+ vcpu->arch.gpr_tm[id - KVM_REG_PPC_TM_GPR0] =
+ set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63:
+ {
+ int i, j;
+
+ i = id - KVM_REG_PPC_TM_VSR0;
+ if (i < 32)
+ for (j = 0; j < TS_FPRWIDTH; j++)
+ vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j];
+ else
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ vcpu->arch.vr_tm.vr[i-32] = val->vval;
+ else
+ r = -ENXIO;
+ break;
+ }
+ case KVM_REG_PPC_TM_CR:
+ vcpu->arch.cr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_XER:
+ vcpu->arch.xer_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_LR:
+ vcpu->arch.lr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_CTR:
+ vcpu->arch.ctr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_FPSCR:
+ vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_AMR:
+ vcpu->arch.amr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_PPR:
+ vcpu->arch.ppr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_VRSAVE:
+ vcpu->arch.vrsave_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_VSCR:
+ if (cpu_has_feature(CPU_FTR_ALTIVEC))
+ vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val);
+ else
+ r = -ENXIO;
+ break;
+ case KVM_REG_PPC_TM_DSCR:
+ vcpu->arch.dscr_tm = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_TM_TAR:
+ vcpu->arch.tar_tm = set_reg_val(id, *val);
+ break;
+#endif
+ default:
+ r = -EINVAL;
+ break;
+ }
+
+ return r;
+}
+
+static int kvmppc_core_vcpu_create_pr(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_vcpu_book3s *vcpu_book3s;
+ unsigned long p;
+ int err;
+
+ err = -ENOMEM;
+
+ vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
+ if (!vcpu_book3s)
+ goto out;
+ vcpu->arch.book3s = vcpu_book3s;
+
+#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
+ vcpu->arch.shadow_vcpu =
+ kzalloc(sizeof(*vcpu->arch.shadow_vcpu), GFP_KERNEL);
+ if (!vcpu->arch.shadow_vcpu)
+ goto free_vcpu3s;
+#endif
+
+ p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
+ if (!p)
+ goto free_shadow_vcpu;
+ vcpu->arch.shared = (void *)p;
+#ifdef CONFIG_PPC_BOOK3S_64
+ /* Always start the shared struct in native endian mode */
+#ifdef __BIG_ENDIAN__
+ vcpu->arch.shared_big_endian = true;
+#else
+ vcpu->arch.shared_big_endian = false;
+#endif
+
+ /*
+ * Default to the same as the host if we're on sufficiently
+ * recent machine that we have 1TB segments;
+ * otherwise default to PPC970FX.
+ */
+ vcpu->arch.pvr = 0x3C0301;
+ if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
+ vcpu->arch.pvr = mfspr(SPRN_PVR);
+ vcpu->arch.intr_msr = MSR_SF;
+#else
+ /* default to book3s_32 (750) */
+ vcpu->arch.pvr = 0x84202;
+ vcpu->arch.intr_msr = 0;
+#endif
+ kvmppc_set_pvr_pr(vcpu, vcpu->arch.pvr);
+ vcpu->arch.slb_nr = 64;
+
+ vcpu->arch.shadow_msr = MSR_USER64 & ~MSR_LE;
+
+ err = kvmppc_mmu_init_pr(vcpu);
+ if (err < 0)
+ goto free_shared_page;
+
+ return 0;
+
+free_shared_page:
+ free_page((unsigned long)vcpu->arch.shared);
+free_shadow_vcpu:
+#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
+ kfree(vcpu->arch.shadow_vcpu);
+free_vcpu3s:
+#endif
+ vfree(vcpu_book3s);
+out:
+ return err;
+}
+
+static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
+{
+ struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
+
+ kvmppc_mmu_destroy_pr(vcpu);
+ free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
+#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
+ kfree(vcpu->arch.shadow_vcpu);
+#endif
+ vfree(vcpu_book3s);
+}
+
+static int kvmppc_vcpu_run_pr(struct kvm_vcpu *vcpu)
+{
+ int ret;
+
+ /* Check if we can run the vcpu at all */
+ if (!vcpu->arch.sane) {
+ vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
+ ret = -EINVAL;
+ goto out;
+ }
+
+ kvmppc_setup_debug(vcpu);
+
+ /*
+ * Interrupts could be timers for the guest which we have to inject
+ * again, so let's postpone them until we're in the guest and if we
+ * really did time things so badly, then we just exit again due to
+ * a host external interrupt.
+ */
+ ret = kvmppc_prepare_to_enter(vcpu);
+ if (ret <= 0)
+ goto out;
+ /* interrupts now hard-disabled */
+
+ /* Save FPU, Altivec and VSX state */
+ giveup_all(current);
+
+ /* Preload FPU if it's enabled */
+ if (kvmppc_get_msr(vcpu) & MSR_FP)
+ kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
+
+ kvmppc_fix_ee_before_entry();
+
+ ret = __kvmppc_vcpu_run(vcpu);
+
+ kvmppc_clear_debug(vcpu);
+
+ /* No need for guest_exit. It's done in handle_exit.
+ We also get here with interrupts enabled. */
+
+ /* Make sure we save the guest FPU/Altivec/VSX state */
+ kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
+
+ /* Make sure we save the guest TAR/EBB/DSCR state */
+ kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
+
+out:
+ vcpu->mode = OUTSIDE_GUEST_MODE;
+ return ret;
+}
+
+/*
+ * Get (and clear) the dirty memory log for a memory slot.
+ */
+static int kvm_vm_ioctl_get_dirty_log_pr(struct kvm *kvm,
+ struct kvm_dirty_log *log)
+{
+ struct kvm_memory_slot *memslot;
+ struct kvm_vcpu *vcpu;
+ ulong ga, ga_end;
+ int is_dirty = 0;
+ int r;
+ unsigned long n;
+
+ mutex_lock(&kvm->slots_lock);
+
+ r = kvm_get_dirty_log(kvm, log, &is_dirty, &memslot);
+ if (r)
+ goto out;
+
+ /* If nothing is dirty, don't bother messing with page tables. */
+ if (is_dirty) {
+ ga = memslot->base_gfn << PAGE_SHIFT;
+ ga_end = ga + (memslot->npages << PAGE_SHIFT);
+
+ kvm_for_each_vcpu(n, vcpu, kvm)
+ kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
+
+ n = kvm_dirty_bitmap_bytes(memslot);
+ memset(memslot->dirty_bitmap, 0, n);
+ }
+
+ r = 0;
+out:
+ mutex_unlock(&kvm->slots_lock);
+ return r;
+}
+
+static void kvmppc_core_flush_memslot_pr(struct kvm *kvm,
+ struct kvm_memory_slot *memslot)
+{
+ return;
+}
+
+static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm,
+ struct kvm_memory_slot *memslot,
+ const struct kvm_userspace_memory_region *mem,
+ enum kvm_mr_change change)
+{
+ return 0;
+}
+
+static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm,
+ const struct kvm_userspace_memory_region *mem,
+ const struct kvm_memory_slot *old,
+ const struct kvm_memory_slot *new,
+ enum kvm_mr_change change)
+{
+ return;
+}
+
+static void kvmppc_core_free_memslot_pr(struct kvm_memory_slot *slot)
+{
+ return;
+}
+
+#ifdef CONFIG_PPC64
+static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
+ struct kvm_ppc_smmu_info *info)
+{
+ long int i;
+ struct kvm_vcpu *vcpu;
+
+ info->flags = 0;
+
+ /* SLB is always 64 entries */
+ info->slb_size = 64;
+
+ /* Standard 4k base page size segment */
+ info->sps[0].page_shift = 12;
+ info->sps[0].slb_enc = 0;
+ info->sps[0].enc[0].page_shift = 12;
+ info->sps[0].enc[0].pte_enc = 0;
+
+ /*
+ * 64k large page size.
+ * We only want to put this in if the CPUs we're emulating
+ * support it, but unfortunately we don't have a vcpu easily
+ * to hand here to test. Just pick the first vcpu, and if
+ * that doesn't exist yet, report the minimum capability,
+ * i.e., no 64k pages.
+ * 1T segment support goes along with 64k pages.
+ */
+ i = 1;
+ vcpu = kvm_get_vcpu(kvm, 0);
+ if (vcpu && (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE)) {
+ info->flags = KVM_PPC_1T_SEGMENTS;
+ info->sps[i].page_shift = 16;
+ info->sps[i].slb_enc = SLB_VSID_L | SLB_VSID_LP_01;
+ info->sps[i].enc[0].page_shift = 16;
+ info->sps[i].enc[0].pte_enc = 1;
+ ++i;
+ }
+
+ /* Standard 16M large page size segment */
+ info->sps[i].page_shift = 24;
+ info->sps[i].slb_enc = SLB_VSID_L;
+ info->sps[i].enc[0].page_shift = 24;
+ info->sps[i].enc[0].pte_enc = 0;
+
+ return 0;
+}
+
+static int kvm_configure_mmu_pr(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg)
+{
+ if (!cpu_has_feature(CPU_FTR_ARCH_300))
+ return -ENODEV;
+ /* Require flags and process table base and size to all be zero. */
+ if (cfg->flags || cfg->process_table)
+ return -EINVAL;
+ return 0;
+}
+
+#else
+static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
+ struct kvm_ppc_smmu_info *info)
+{
+ /* We should not get called */
+ BUG();
+ return 0;
+}
+#endif /* CONFIG_PPC64 */
+
+static unsigned int kvm_global_user_count = 0;
+static DEFINE_SPINLOCK(kvm_global_user_count_lock);
+
+static int kvmppc_core_init_vm_pr(struct kvm *kvm)
+{
+ mutex_init(&kvm->arch.hpt_mutex);
+
+#ifdef CONFIG_PPC_BOOK3S_64
+ /* Start out with the default set of hcalls enabled */
+ kvmppc_pr_init_default_hcalls(kvm);
+#endif
+
+ if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
+ spin_lock(&kvm_global_user_count_lock);
+ if (++kvm_global_user_count == 1)
+ pseries_disable_reloc_on_exc();
+ spin_unlock(&kvm_global_user_count_lock);
+ }
+ return 0;
+}
+
+static void kvmppc_core_destroy_vm_pr(struct kvm *kvm)
+{
+#ifdef CONFIG_PPC64
+ WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
+#endif
+
+ if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
+ spin_lock(&kvm_global_user_count_lock);
+ BUG_ON(kvm_global_user_count == 0);
+ if (--kvm_global_user_count == 0)
+ pseries_enable_reloc_on_exc();
+ spin_unlock(&kvm_global_user_count_lock);
+ }
+}
+
+static int kvmppc_core_check_processor_compat_pr(void)
+{
+ /*
+ * PR KVM can work on POWER9 inside a guest partition
+ * running in HPT mode. It can't work if we are using
+ * radix translation (because radix provides no way for
+ * a process to have unique translations in quadrant 3).
+ */
+ if (cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled())
+ return -EIO;
+ return 0;
+}
+
+static long kvm_arch_vm_ioctl_pr(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ return -ENOTTY;
+}
+
+static struct kvmppc_ops kvm_ops_pr = {
+ .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_pr,
+ .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_pr,
+ .get_one_reg = kvmppc_get_one_reg_pr,
+ .set_one_reg = kvmppc_set_one_reg_pr,
+ .vcpu_load = kvmppc_core_vcpu_load_pr,
+ .vcpu_put = kvmppc_core_vcpu_put_pr,
+ .inject_interrupt = kvmppc_inject_interrupt_pr,
+ .set_msr = kvmppc_set_msr_pr,
+ .vcpu_run = kvmppc_vcpu_run_pr,
+ .vcpu_create = kvmppc_core_vcpu_create_pr,
+ .vcpu_free = kvmppc_core_vcpu_free_pr,
+ .check_requests = kvmppc_core_check_requests_pr,
+ .get_dirty_log = kvm_vm_ioctl_get_dirty_log_pr,
+ .flush_memslot = kvmppc_core_flush_memslot_pr,
+ .prepare_memory_region = kvmppc_core_prepare_memory_region_pr,
+ .commit_memory_region = kvmppc_core_commit_memory_region_pr,
+ .unmap_hva_range = kvm_unmap_hva_range_pr,
+ .age_hva = kvm_age_hva_pr,
+ .test_age_hva = kvm_test_age_hva_pr,
+ .set_spte_hva = kvm_set_spte_hva_pr,
+ .free_memslot = kvmppc_core_free_memslot_pr,
+ .init_vm = kvmppc_core_init_vm_pr,
+ .destroy_vm = kvmppc_core_destroy_vm_pr,
+ .get_smmu_info = kvm_vm_ioctl_get_smmu_info_pr,
+ .emulate_op = kvmppc_core_emulate_op_pr,
+ .emulate_mtspr = kvmppc_core_emulate_mtspr_pr,
+ .emulate_mfspr = kvmppc_core_emulate_mfspr_pr,
+ .fast_vcpu_kick = kvm_vcpu_kick,
+ .arch_vm_ioctl = kvm_arch_vm_ioctl_pr,
+#ifdef CONFIG_PPC_BOOK3S_64
+ .hcall_implemented = kvmppc_hcall_impl_pr,
+ .configure_mmu = kvm_configure_mmu_pr,
+#endif
+ .giveup_ext = kvmppc_giveup_ext,
+};
+
+
+int kvmppc_book3s_init_pr(void)
+{
+ int r;
+
+ r = kvmppc_core_check_processor_compat_pr();
+ if (r < 0)
+ return r;
+
+ kvm_ops_pr.owner = THIS_MODULE;
+ kvmppc_pr_ops = &kvm_ops_pr;
+
+ r = kvmppc_mmu_hpte_sysinit();
+ return r;
+}
+
+void kvmppc_book3s_exit_pr(void)
+{
+ kvmppc_pr_ops = NULL;
+ kvmppc_mmu_hpte_sysexit();
+}
+
+/*
+ * We only support separate modules for book3s 64
+ */
+#ifdef CONFIG_PPC_BOOK3S_64
+
+module_init(kvmppc_book3s_init_pr);
+module_exit(kvmppc_book3s_exit_pr);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(KVM_MINOR);
+MODULE_ALIAS("devname:kvm");
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 20:23:01 +0000