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![Paul Mackerras](/assets/img/avatar_default.png)
This adds code to check that when the KVM_CAP_PPC_ENABLE_HCALL capability is used to enable or disable in-kernel handling of an hcall, that the hcall is actually implemented by the kernel. If not an EINVAL error is returned. This also checks the default-enabled list of hcalls and prints a warning if any hcall there is not actually implemented. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
1253 lines
27 KiB
C
1253 lines
27 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright IBM Corp. 2007
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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* Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
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*/
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/kvm_host.h>
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#include <linux/vmalloc.h>
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#include <linux/hrtimer.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/file.h>
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#include <linux/module.h>
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#include <asm/cputable.h>
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#include <asm/uaccess.h>
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#include <asm/kvm_ppc.h>
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#include <asm/tlbflush.h>
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#include <asm/cputhreads.h>
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#include <asm/irqflags.h>
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#include "timing.h"
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#include "irq.h"
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#include "../mm/mmu_decl.h"
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#define CREATE_TRACE_POINTS
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#include "trace.h"
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struct kvmppc_ops *kvmppc_hv_ops;
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EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
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struct kvmppc_ops *kvmppc_pr_ops;
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EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
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int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
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{
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return !!(v->arch.pending_exceptions) ||
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v->requests;
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}
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int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
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{
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return 1;
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}
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/*
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* Common checks before entering the guest world. Call with interrupts
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* disabled.
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*
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* returns:
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*
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* == 1 if we're ready to go into guest state
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* <= 0 if we need to go back to the host with return value
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*/
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int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
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{
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int r;
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WARN_ON(irqs_disabled());
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hard_irq_disable();
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while (true) {
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if (need_resched()) {
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local_irq_enable();
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cond_resched();
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hard_irq_disable();
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continue;
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}
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if (signal_pending(current)) {
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kvmppc_account_exit(vcpu, SIGNAL_EXITS);
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vcpu->run->exit_reason = KVM_EXIT_INTR;
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r = -EINTR;
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break;
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}
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vcpu->mode = IN_GUEST_MODE;
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/*
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* Reading vcpu->requests must happen after setting vcpu->mode,
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* so we don't miss a request because the requester sees
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* OUTSIDE_GUEST_MODE and assumes we'll be checking requests
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* before next entering the guest (and thus doesn't IPI).
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*/
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smp_mb();
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if (vcpu->requests) {
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/* Make sure we process requests preemptable */
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local_irq_enable();
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trace_kvm_check_requests(vcpu);
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r = kvmppc_core_check_requests(vcpu);
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hard_irq_disable();
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if (r > 0)
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continue;
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break;
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}
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if (kvmppc_core_prepare_to_enter(vcpu)) {
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/* interrupts got enabled in between, so we
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are back at square 1 */
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continue;
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}
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kvm_guest_enter();
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return 1;
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}
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/* return to host */
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local_irq_enable();
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return r;
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}
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EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
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#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
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static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
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{
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struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
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int i;
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shared->sprg0 = swab64(shared->sprg0);
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shared->sprg1 = swab64(shared->sprg1);
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shared->sprg2 = swab64(shared->sprg2);
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shared->sprg3 = swab64(shared->sprg3);
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shared->srr0 = swab64(shared->srr0);
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shared->srr1 = swab64(shared->srr1);
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shared->dar = swab64(shared->dar);
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shared->msr = swab64(shared->msr);
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shared->dsisr = swab32(shared->dsisr);
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shared->int_pending = swab32(shared->int_pending);
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for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
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shared->sr[i] = swab32(shared->sr[i]);
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}
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#endif
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int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
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{
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int nr = kvmppc_get_gpr(vcpu, 11);
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int r;
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unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
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unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
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unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
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unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
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unsigned long r2 = 0;
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if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
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/* 32 bit mode */
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param1 &= 0xffffffff;
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param2 &= 0xffffffff;
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param3 &= 0xffffffff;
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param4 &= 0xffffffff;
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}
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switch (nr) {
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case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
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{
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#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
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/* Book3S can be little endian, find it out here */
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int shared_big_endian = true;
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if (vcpu->arch.intr_msr & MSR_LE)
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shared_big_endian = false;
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if (shared_big_endian != vcpu->arch.shared_big_endian)
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kvmppc_swab_shared(vcpu);
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vcpu->arch.shared_big_endian = shared_big_endian;
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#endif
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if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
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/*
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* Older versions of the Linux magic page code had
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* a bug where they would map their trampoline code
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* NX. If that's the case, remove !PR NX capability.
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*/
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vcpu->arch.disable_kernel_nx = true;
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kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
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}
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vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
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vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
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r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
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r = EV_SUCCESS;
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break;
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}
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case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
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r = EV_SUCCESS;
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#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
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/* XXX Missing magic page on 44x */
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r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
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#endif
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/* Second return value is in r4 */
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break;
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case EV_HCALL_TOKEN(EV_IDLE):
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r = EV_SUCCESS;
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kvm_vcpu_block(vcpu);
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clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
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break;
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default:
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r = EV_UNIMPLEMENTED;
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break;
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}
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kvmppc_set_gpr(vcpu, 4, r2);
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return r;
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}
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EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
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int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
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{
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int r = false;
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/* We have to know what CPU to virtualize */
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if (!vcpu->arch.pvr)
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goto out;
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/* PAPR only works with book3s_64 */
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if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
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goto out;
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/* HV KVM can only do PAPR mode for now */
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if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
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goto out;
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#ifdef CONFIG_KVM_BOOKE_HV
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if (!cpu_has_feature(CPU_FTR_EMB_HV))
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goto out;
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#endif
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r = true;
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out:
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vcpu->arch.sane = r;
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return r ? 0 : -EINVAL;
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}
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EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
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int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
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{
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enum emulation_result er;
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int r;
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er = kvmppc_emulate_instruction(run, vcpu);
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switch (er) {
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case EMULATE_DONE:
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/* Future optimization: only reload non-volatiles if they were
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* actually modified. */
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r = RESUME_GUEST_NV;
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break;
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case EMULATE_DO_MMIO:
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run->exit_reason = KVM_EXIT_MMIO;
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/* We must reload nonvolatiles because "update" load/store
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* instructions modify register state. */
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/* Future optimization: only reload non-volatiles if they were
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* actually modified. */
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r = RESUME_HOST_NV;
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break;
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case EMULATE_FAIL:
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/* XXX Deliver Program interrupt to guest. */
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printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
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kvmppc_get_last_inst(vcpu));
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r = RESUME_HOST;
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break;
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default:
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WARN_ON(1);
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r = RESUME_GUEST;
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}
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return r;
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}
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EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
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int kvm_arch_hardware_enable(void *garbage)
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{
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return 0;
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}
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void kvm_arch_hardware_disable(void *garbage)
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{
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}
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int kvm_arch_hardware_setup(void)
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{
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return 0;
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}
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void kvm_arch_hardware_unsetup(void)
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{
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}
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void kvm_arch_check_processor_compat(void *rtn)
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{
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*(int *)rtn = kvmppc_core_check_processor_compat();
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}
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int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
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{
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struct kvmppc_ops *kvm_ops = NULL;
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/*
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* if we have both HV and PR enabled, default is HV
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*/
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if (type == 0) {
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if (kvmppc_hv_ops)
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kvm_ops = kvmppc_hv_ops;
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else
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kvm_ops = kvmppc_pr_ops;
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if (!kvm_ops)
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goto err_out;
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} else if (type == KVM_VM_PPC_HV) {
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if (!kvmppc_hv_ops)
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goto err_out;
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kvm_ops = kvmppc_hv_ops;
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} else if (type == KVM_VM_PPC_PR) {
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if (!kvmppc_pr_ops)
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goto err_out;
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kvm_ops = kvmppc_pr_ops;
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} else
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goto err_out;
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if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
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return -ENOENT;
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kvm->arch.kvm_ops = kvm_ops;
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return kvmppc_core_init_vm(kvm);
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err_out:
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return -EINVAL;
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}
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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
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unsigned int i;
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struct kvm_vcpu *vcpu;
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kvm_for_each_vcpu(i, vcpu, kvm)
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kvm_arch_vcpu_free(vcpu);
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mutex_lock(&kvm->lock);
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for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
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kvm->vcpus[i] = NULL;
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atomic_set(&kvm->online_vcpus, 0);
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kvmppc_core_destroy_vm(kvm);
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mutex_unlock(&kvm->lock);
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/* drop the module reference */
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module_put(kvm->arch.kvm_ops->owner);
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}
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void kvm_arch_sync_events(struct kvm *kvm)
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{
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}
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int kvm_dev_ioctl_check_extension(long ext)
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{
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int r;
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/* FIXME!!
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* Should some of this be vm ioctl ? is it possible now ?
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*/
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int hv_enabled = kvmppc_hv_ops ? 1 : 0;
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switch (ext) {
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#ifdef CONFIG_BOOKE
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case KVM_CAP_PPC_BOOKE_SREGS:
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case KVM_CAP_PPC_BOOKE_WATCHDOG:
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case KVM_CAP_PPC_EPR:
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#else
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case KVM_CAP_PPC_SEGSTATE:
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case KVM_CAP_PPC_HIOR:
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case KVM_CAP_PPC_PAPR:
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#endif
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case KVM_CAP_PPC_UNSET_IRQ:
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case KVM_CAP_PPC_IRQ_LEVEL:
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case KVM_CAP_ENABLE_CAP:
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case KVM_CAP_ENABLE_CAP_VM:
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case KVM_CAP_ONE_REG:
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case KVM_CAP_IOEVENTFD:
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case KVM_CAP_DEVICE_CTRL:
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r = 1;
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break;
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case KVM_CAP_PPC_PAIRED_SINGLES:
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case KVM_CAP_PPC_OSI:
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case KVM_CAP_PPC_GET_PVINFO:
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#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
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case KVM_CAP_SW_TLB:
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#endif
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/* We support this only for PR */
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r = !hv_enabled;
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break;
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#ifdef CONFIG_KVM_MMIO
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case KVM_CAP_COALESCED_MMIO:
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r = KVM_COALESCED_MMIO_PAGE_OFFSET;
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break;
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#endif
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#ifdef CONFIG_KVM_MPIC
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case KVM_CAP_IRQ_MPIC:
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r = 1;
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break;
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#endif
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#ifdef CONFIG_PPC_BOOK3S_64
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case KVM_CAP_SPAPR_TCE:
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case KVM_CAP_PPC_ALLOC_HTAB:
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case KVM_CAP_PPC_RTAS:
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case KVM_CAP_PPC_FIXUP_HCALL:
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case KVM_CAP_PPC_ENABLE_HCALL:
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#ifdef CONFIG_KVM_XICS
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case KVM_CAP_IRQ_XICS:
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#endif
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r = 1;
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break;
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#endif /* CONFIG_PPC_BOOK3S_64 */
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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case KVM_CAP_PPC_SMT:
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if (hv_enabled)
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r = threads_per_subcore;
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else
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r = 0;
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break;
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case KVM_CAP_PPC_RMA:
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r = hv_enabled;
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/* PPC970 requires an RMA */
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if (r && cpu_has_feature(CPU_FTR_ARCH_201))
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r = 2;
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break;
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#endif
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case KVM_CAP_SYNC_MMU:
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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if (hv_enabled)
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r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
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else
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r = 0;
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#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
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r = 1;
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#else
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r = 0;
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#endif
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break;
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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case KVM_CAP_PPC_HTAB_FD:
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r = hv_enabled;
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break;
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#endif
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case KVM_CAP_NR_VCPUS:
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/*
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* Recommending a number of CPUs is somewhat arbitrary; we
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* return the number of present CPUs for -HV (since a host
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* will have secondary threads "offline"), and for other KVM
|
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* implementations just count online CPUs.
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*/
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if (hv_enabled)
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r = num_present_cpus();
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else
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r = num_online_cpus();
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break;
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case KVM_CAP_MAX_VCPUS:
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r = KVM_MAX_VCPUS;
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break;
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#ifdef CONFIG_PPC_BOOK3S_64
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case KVM_CAP_PPC_GET_SMMU_INFO:
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r = 1;
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break;
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#endif
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default:
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r = 0;
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break;
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}
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return r;
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|
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}
|
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|
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long kvm_arch_dev_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg)
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{
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return -EINVAL;
|
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}
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|
|
|
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
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struct kvm_memory_slot *dont)
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{
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kvmppc_core_free_memslot(kvm, free, dont);
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}
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|
|
int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
|
|
unsigned long npages)
|
|
{
|
|
return kvmppc_core_create_memslot(kvm, slot, npages);
|
|
}
|
|
|
|
void kvm_arch_memslots_updated(struct kvm *kvm)
|
|
{
|
|
}
|
|
|
|
int kvm_arch_prepare_memory_region(struct kvm *kvm,
|
|
struct kvm_memory_slot *memslot,
|
|
struct kvm_userspace_memory_region *mem,
|
|
enum kvm_mr_change change)
|
|
{
|
|
return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
|
|
}
|
|
|
|
void kvm_arch_commit_memory_region(struct kvm *kvm,
|
|
struct kvm_userspace_memory_region *mem,
|
|
const struct kvm_memory_slot *old,
|
|
enum kvm_mr_change change)
|
|
{
|
|
kvmppc_core_commit_memory_region(kvm, mem, old);
|
|
}
|
|
|
|
void kvm_arch_flush_shadow_all(struct kvm *kvm)
|
|
{
|
|
}
|
|
|
|
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
|
|
struct kvm_memory_slot *slot)
|
|
{
|
|
kvmppc_core_flush_memslot(kvm, slot);
|
|
}
|
|
|
|
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
vcpu = kvmppc_core_vcpu_create(kvm, id);
|
|
if (!IS_ERR(vcpu)) {
|
|
vcpu->arch.wqp = &vcpu->wq;
|
|
kvmppc_create_vcpu_debugfs(vcpu, id);
|
|
}
|
|
return vcpu;
|
|
}
|
|
|
|
int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
|
|
{
|
|
/* Make sure we're not using the vcpu anymore */
|
|
hrtimer_cancel(&vcpu->arch.dec_timer);
|
|
tasklet_kill(&vcpu->arch.tasklet);
|
|
|
|
kvmppc_remove_vcpu_debugfs(vcpu);
|
|
|
|
switch (vcpu->arch.irq_type) {
|
|
case KVMPPC_IRQ_MPIC:
|
|
kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
|
|
break;
|
|
case KVMPPC_IRQ_XICS:
|
|
kvmppc_xics_free_icp(vcpu);
|
|
break;
|
|
}
|
|
|
|
kvmppc_core_vcpu_free(vcpu);
|
|
}
|
|
|
|
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvm_arch_vcpu_free(vcpu);
|
|
}
|
|
|
|
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
|
|
{
|
|
return kvmppc_core_pending_dec(vcpu);
|
|
}
|
|
|
|
/*
|
|
* low level hrtimer wake routine. Because this runs in hardirq context
|
|
* we schedule a tasklet to do the real work.
|
|
*/
|
|
enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
|
|
vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
|
|
tasklet_schedule(&vcpu->arch.tasklet);
|
|
|
|
return HRTIMER_NORESTART;
|
|
}
|
|
|
|
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
|
|
{
|
|
int ret;
|
|
|
|
hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
|
|
tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
|
|
vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
|
|
vcpu->arch.dec_expires = ~(u64)0;
|
|
|
|
#ifdef CONFIG_KVM_EXIT_TIMING
|
|
mutex_init(&vcpu->arch.exit_timing_lock);
|
|
#endif
|
|
ret = kvmppc_subarch_vcpu_init(vcpu);
|
|
return ret;
|
|
}
|
|
|
|
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvmppc_mmu_destroy(vcpu);
|
|
kvmppc_subarch_vcpu_uninit(vcpu);
|
|
}
|
|
|
|
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
|
|
{
|
|
#ifdef CONFIG_BOOKE
|
|
/*
|
|
* vrsave (formerly usprg0) isn't used by Linux, but may
|
|
* be used by the guest.
|
|
*
|
|
* On non-booke this is associated with Altivec and
|
|
* is handled by code in book3s.c.
|
|
*/
|
|
mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
|
|
#endif
|
|
kvmppc_core_vcpu_load(vcpu, cpu);
|
|
}
|
|
|
|
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvmppc_core_vcpu_put(vcpu);
|
|
#ifdef CONFIG_BOOKE
|
|
vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
|
|
#endif
|
|
}
|
|
|
|
static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
|
|
struct kvm_run *run)
|
|
{
|
|
kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
|
|
}
|
|
|
|
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
|
|
struct kvm_run *run)
|
|
{
|
|
u64 uninitialized_var(gpr);
|
|
|
|
if (run->mmio.len > sizeof(gpr)) {
|
|
printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
|
|
return;
|
|
}
|
|
|
|
if (vcpu->arch.mmio_is_bigendian) {
|
|
switch (run->mmio.len) {
|
|
case 8: gpr = *(u64 *)run->mmio.data; break;
|
|
case 4: gpr = *(u32 *)run->mmio.data; break;
|
|
case 2: gpr = *(u16 *)run->mmio.data; break;
|
|
case 1: gpr = *(u8 *)run->mmio.data; break;
|
|
}
|
|
} else {
|
|
/* Convert BE data from userland back to LE. */
|
|
switch (run->mmio.len) {
|
|
case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
|
|
case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
|
|
case 1: gpr = *(u8 *)run->mmio.data; break;
|
|
}
|
|
}
|
|
|
|
if (vcpu->arch.mmio_sign_extend) {
|
|
switch (run->mmio.len) {
|
|
#ifdef CONFIG_PPC64
|
|
case 4:
|
|
gpr = (s64)(s32)gpr;
|
|
break;
|
|
#endif
|
|
case 2:
|
|
gpr = (s64)(s16)gpr;
|
|
break;
|
|
case 1:
|
|
gpr = (s64)(s8)gpr;
|
|
break;
|
|
}
|
|
}
|
|
|
|
kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
|
|
|
|
switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
|
|
case KVM_MMIO_REG_GPR:
|
|
kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
|
|
break;
|
|
case KVM_MMIO_REG_FPR:
|
|
VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
|
|
break;
|
|
#ifdef CONFIG_PPC_BOOK3S
|
|
case KVM_MMIO_REG_QPR:
|
|
vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
|
|
break;
|
|
case KVM_MMIO_REG_FQPR:
|
|
VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
|
|
vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
|
|
break;
|
|
#endif
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
|
|
unsigned int rt, unsigned int bytes,
|
|
int is_default_endian)
|
|
{
|
|
int idx, ret;
|
|
int is_bigendian;
|
|
|
|
if (kvmppc_need_byteswap(vcpu)) {
|
|
/* Default endianness is "little endian". */
|
|
is_bigendian = !is_default_endian;
|
|
} else {
|
|
/* Default endianness is "big endian". */
|
|
is_bigendian = is_default_endian;
|
|
}
|
|
|
|
if (bytes > sizeof(run->mmio.data)) {
|
|
printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
|
|
run->mmio.len);
|
|
}
|
|
|
|
run->mmio.phys_addr = vcpu->arch.paddr_accessed;
|
|
run->mmio.len = bytes;
|
|
run->mmio.is_write = 0;
|
|
|
|
vcpu->arch.io_gpr = rt;
|
|
vcpu->arch.mmio_is_bigendian = is_bigendian;
|
|
vcpu->mmio_needed = 1;
|
|
vcpu->mmio_is_write = 0;
|
|
vcpu->arch.mmio_sign_extend = 0;
|
|
|
|
idx = srcu_read_lock(&vcpu->kvm->srcu);
|
|
|
|
ret = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
|
|
bytes, &run->mmio.data);
|
|
|
|
srcu_read_unlock(&vcpu->kvm->srcu, idx);
|
|
|
|
if (!ret) {
|
|
kvmppc_complete_mmio_load(vcpu, run);
|
|
vcpu->mmio_needed = 0;
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
return EMULATE_DO_MMIO;
|
|
}
|
|
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
|
|
|
|
/* Same as above, but sign extends */
|
|
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
|
|
unsigned int rt, unsigned int bytes,
|
|
int is_default_endian)
|
|
{
|
|
int r;
|
|
|
|
vcpu->arch.mmio_sign_extend = 1;
|
|
r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
|
|
|
|
return r;
|
|
}
|
|
|
|
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
|
|
u64 val, unsigned int bytes, int is_default_endian)
|
|
{
|
|
void *data = run->mmio.data;
|
|
int idx, ret;
|
|
int is_bigendian;
|
|
|
|
if (kvmppc_need_byteswap(vcpu)) {
|
|
/* Default endianness is "little endian". */
|
|
is_bigendian = !is_default_endian;
|
|
} else {
|
|
/* Default endianness is "big endian". */
|
|
is_bigendian = is_default_endian;
|
|
}
|
|
|
|
if (bytes > sizeof(run->mmio.data)) {
|
|
printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
|
|
run->mmio.len);
|
|
}
|
|
|
|
run->mmio.phys_addr = vcpu->arch.paddr_accessed;
|
|
run->mmio.len = bytes;
|
|
run->mmio.is_write = 1;
|
|
vcpu->mmio_needed = 1;
|
|
vcpu->mmio_is_write = 1;
|
|
|
|
/* Store the value at the lowest bytes in 'data'. */
|
|
if (is_bigendian) {
|
|
switch (bytes) {
|
|
case 8: *(u64 *)data = val; break;
|
|
case 4: *(u32 *)data = val; break;
|
|
case 2: *(u16 *)data = val; break;
|
|
case 1: *(u8 *)data = val; break;
|
|
}
|
|
} else {
|
|
/* Store LE value into 'data'. */
|
|
switch (bytes) {
|
|
case 4: st_le32(data, val); break;
|
|
case 2: st_le16(data, val); break;
|
|
case 1: *(u8 *)data = val; break;
|
|
}
|
|
}
|
|
|
|
idx = srcu_read_lock(&vcpu->kvm->srcu);
|
|
|
|
ret = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr,
|
|
bytes, &run->mmio.data);
|
|
|
|
srcu_read_unlock(&vcpu->kvm->srcu, idx);
|
|
|
|
if (!ret) {
|
|
vcpu->mmio_needed = 0;
|
|
return EMULATE_DONE;
|
|
}
|
|
|
|
return EMULATE_DO_MMIO;
|
|
}
|
|
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
|
|
|
|
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
|
|
{
|
|
int r;
|
|
sigset_t sigsaved;
|
|
|
|
if (vcpu->sigset_active)
|
|
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
|
|
|
|
if (vcpu->mmio_needed) {
|
|
if (!vcpu->mmio_is_write)
|
|
kvmppc_complete_mmio_load(vcpu, run);
|
|
vcpu->mmio_needed = 0;
|
|
} else if (vcpu->arch.dcr_needed) {
|
|
if (!vcpu->arch.dcr_is_write)
|
|
kvmppc_complete_dcr_load(vcpu, run);
|
|
vcpu->arch.dcr_needed = 0;
|
|
} else if (vcpu->arch.osi_needed) {
|
|
u64 *gprs = run->osi.gprs;
|
|
int i;
|
|
|
|
for (i = 0; i < 32; i++)
|
|
kvmppc_set_gpr(vcpu, i, gprs[i]);
|
|
vcpu->arch.osi_needed = 0;
|
|
} else if (vcpu->arch.hcall_needed) {
|
|
int i;
|
|
|
|
kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
|
|
for (i = 0; i < 9; ++i)
|
|
kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
|
|
vcpu->arch.hcall_needed = 0;
|
|
#ifdef CONFIG_BOOKE
|
|
} else if (vcpu->arch.epr_needed) {
|
|
kvmppc_set_epr(vcpu, run->epr.epr);
|
|
vcpu->arch.epr_needed = 0;
|
|
#endif
|
|
}
|
|
|
|
r = kvmppc_vcpu_run(run, vcpu);
|
|
|
|
if (vcpu->sigset_active)
|
|
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
|
|
|
|
return r;
|
|
}
|
|
|
|
int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
|
|
{
|
|
if (irq->irq == KVM_INTERRUPT_UNSET) {
|
|
kvmppc_core_dequeue_external(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
kvmppc_core_queue_external(vcpu, irq);
|
|
|
|
kvm_vcpu_kick(vcpu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
|
|
struct kvm_enable_cap *cap)
|
|
{
|
|
int r;
|
|
|
|
if (cap->flags)
|
|
return -EINVAL;
|
|
|
|
switch (cap->cap) {
|
|
case KVM_CAP_PPC_OSI:
|
|
r = 0;
|
|
vcpu->arch.osi_enabled = true;
|
|
break;
|
|
case KVM_CAP_PPC_PAPR:
|
|
r = 0;
|
|
vcpu->arch.papr_enabled = true;
|
|
break;
|
|
case KVM_CAP_PPC_EPR:
|
|
r = 0;
|
|
if (cap->args[0])
|
|
vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
|
|
else
|
|
vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
|
|
break;
|
|
#ifdef CONFIG_BOOKE
|
|
case KVM_CAP_PPC_BOOKE_WATCHDOG:
|
|
r = 0;
|
|
vcpu->arch.watchdog_enabled = true;
|
|
break;
|
|
#endif
|
|
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
|
|
case KVM_CAP_SW_TLB: {
|
|
struct kvm_config_tlb cfg;
|
|
void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
|
|
break;
|
|
|
|
r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_KVM_MPIC
|
|
case KVM_CAP_IRQ_MPIC: {
|
|
struct fd f;
|
|
struct kvm_device *dev;
|
|
|
|
r = -EBADF;
|
|
f = fdget(cap->args[0]);
|
|
if (!f.file)
|
|
break;
|
|
|
|
r = -EPERM;
|
|
dev = kvm_device_from_filp(f.file);
|
|
if (dev)
|
|
r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
|
|
|
|
fdput(f);
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_KVM_XICS
|
|
case KVM_CAP_IRQ_XICS: {
|
|
struct fd f;
|
|
struct kvm_device *dev;
|
|
|
|
r = -EBADF;
|
|
f = fdget(cap->args[0]);
|
|
if (!f.file)
|
|
break;
|
|
|
|
r = -EPERM;
|
|
dev = kvm_device_from_filp(f.file);
|
|
if (dev)
|
|
r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
|
|
|
|
fdput(f);
|
|
break;
|
|
}
|
|
#endif /* CONFIG_KVM_XICS */
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (!r)
|
|
r = kvmppc_sanity_check(vcpu);
|
|
|
|
return r;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
|
|
struct kvm_mp_state *mp_state)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
|
|
struct kvm_mp_state *mp_state)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
long kvm_arch_vcpu_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
struct kvm_vcpu *vcpu = filp->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
long r;
|
|
|
|
switch (ioctl) {
|
|
case KVM_INTERRUPT: {
|
|
struct kvm_interrupt irq;
|
|
r = -EFAULT;
|
|
if (copy_from_user(&irq, argp, sizeof(irq)))
|
|
goto out;
|
|
r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
|
|
goto out;
|
|
}
|
|
|
|
case KVM_ENABLE_CAP:
|
|
{
|
|
struct kvm_enable_cap cap;
|
|
r = -EFAULT;
|
|
if (copy_from_user(&cap, argp, sizeof(cap)))
|
|
goto out;
|
|
r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
|
|
break;
|
|
}
|
|
|
|
case KVM_SET_ONE_REG:
|
|
case KVM_GET_ONE_REG:
|
|
{
|
|
struct kvm_one_reg reg;
|
|
r = -EFAULT;
|
|
if (copy_from_user(®, argp, sizeof(reg)))
|
|
goto out;
|
|
if (ioctl == KVM_SET_ONE_REG)
|
|
r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®);
|
|
else
|
|
r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®);
|
|
break;
|
|
}
|
|
|
|
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
|
|
case KVM_DIRTY_TLB: {
|
|
struct kvm_dirty_tlb dirty;
|
|
r = -EFAULT;
|
|
if (copy_from_user(&dirty, argp, sizeof(dirty)))
|
|
goto out;
|
|
r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
r = -EINVAL;
|
|
}
|
|
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
|
|
{
|
|
return VM_FAULT_SIGBUS;
|
|
}
|
|
|
|
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
|
|
{
|
|
u32 inst_nop = 0x60000000;
|
|
#ifdef CONFIG_KVM_BOOKE_HV
|
|
u32 inst_sc1 = 0x44000022;
|
|
pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
|
|
pvinfo->hcall[1] = cpu_to_be32(inst_nop);
|
|
pvinfo->hcall[2] = cpu_to_be32(inst_nop);
|
|
pvinfo->hcall[3] = cpu_to_be32(inst_nop);
|
|
#else
|
|
u32 inst_lis = 0x3c000000;
|
|
u32 inst_ori = 0x60000000;
|
|
u32 inst_sc = 0x44000002;
|
|
u32 inst_imm_mask = 0xffff;
|
|
|
|
/*
|
|
* The hypercall to get into KVM from within guest context is as
|
|
* follows:
|
|
*
|
|
* lis r0, r0, KVM_SC_MAGIC_R0@h
|
|
* ori r0, KVM_SC_MAGIC_R0@l
|
|
* sc
|
|
* nop
|
|
*/
|
|
pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
|
|
pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
|
|
pvinfo->hcall[2] = cpu_to_be32(inst_sc);
|
|
pvinfo->hcall[3] = cpu_to_be32(inst_nop);
|
|
#endif
|
|
|
|
pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
|
|
bool line_status)
|
|
{
|
|
if (!irqchip_in_kernel(kvm))
|
|
return -ENXIO;
|
|
|
|
irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
|
|
irq_event->irq, irq_event->level,
|
|
line_status);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
|
|
struct kvm_enable_cap *cap)
|
|
{
|
|
int r;
|
|
|
|
if (cap->flags)
|
|
return -EINVAL;
|
|
|
|
switch (cap->cap) {
|
|
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
|
|
case KVM_CAP_PPC_ENABLE_HCALL: {
|
|
unsigned long hcall = cap->args[0];
|
|
|
|
r = -EINVAL;
|
|
if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
|
|
cap->args[1] > 1)
|
|
break;
|
|
if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
|
|
break;
|
|
if (cap->args[1])
|
|
set_bit(hcall / 4, kvm->arch.enabled_hcalls);
|
|
else
|
|
clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
|
|
r = 0;
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
long kvm_arch_vm_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
struct kvm *kvm __maybe_unused = filp->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
long r;
|
|
|
|
switch (ioctl) {
|
|
case KVM_PPC_GET_PVINFO: {
|
|
struct kvm_ppc_pvinfo pvinfo;
|
|
memset(&pvinfo, 0, sizeof(pvinfo));
|
|
r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
|
|
if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
|
|
r = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case KVM_ENABLE_CAP:
|
|
{
|
|
struct kvm_enable_cap cap;
|
|
r = -EFAULT;
|
|
if (copy_from_user(&cap, argp, sizeof(cap)))
|
|
goto out;
|
|
r = kvm_vm_ioctl_enable_cap(kvm, &cap);
|
|
break;
|
|
}
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
case KVM_CREATE_SPAPR_TCE: {
|
|
struct kvm_create_spapr_tce create_tce;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
|
|
goto out;
|
|
r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
|
|
goto out;
|
|
}
|
|
case KVM_PPC_GET_SMMU_INFO: {
|
|
struct kvm_ppc_smmu_info info;
|
|
struct kvm *kvm = filp->private_data;
|
|
|
|
memset(&info, 0, sizeof(info));
|
|
r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
|
|
if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
|
|
r = -EFAULT;
|
|
break;
|
|
}
|
|
case KVM_PPC_RTAS_DEFINE_TOKEN: {
|
|
struct kvm *kvm = filp->private_data;
|
|
|
|
r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
|
|
break;
|
|
}
|
|
default: {
|
|
struct kvm *kvm = filp->private_data;
|
|
r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
|
|
}
|
|
#else /* CONFIG_PPC_BOOK3S_64 */
|
|
default:
|
|
r = -ENOTTY;
|
|
#endif
|
|
}
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
|
|
static unsigned long nr_lpids;
|
|
|
|
long kvmppc_alloc_lpid(void)
|
|
{
|
|
long lpid;
|
|
|
|
do {
|
|
lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
|
|
if (lpid >= nr_lpids) {
|
|
pr_err("%s: No LPIDs free\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
} while (test_and_set_bit(lpid, lpid_inuse));
|
|
|
|
return lpid;
|
|
}
|
|
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
|
|
|
|
void kvmppc_claim_lpid(long lpid)
|
|
{
|
|
set_bit(lpid, lpid_inuse);
|
|
}
|
|
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
|
|
|
|
void kvmppc_free_lpid(long lpid)
|
|
{
|
|
clear_bit(lpid, lpid_inuse);
|
|
}
|
|
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
|
|
|
|
void kvmppc_init_lpid(unsigned long nr_lpids_param)
|
|
{
|
|
nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
|
|
memset(lpid_inuse, 0, sizeof(lpid_inuse));
|
|
}
|
|
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
|
|
|
|
int kvm_arch_init(void *opaque)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_exit(void)
|
|
{
|
|
|
|
}
|