mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Pull powerpc updates from Ben Herrenschmidt: "Here is the bulk of the powerpc changes for this merge window. It got a bit delayed in part because I wasn't paying attention, and in part because I discovered I had a core PCI change without a PCI maintainer ack in it. Bjorn eventually agreed it was ok to merge it though we'll probably improve it later and I didn't want to rebase to add his ack. There is going to be a bit more next week, essentially fixes that I still want to sort through and test. The biggest item this time is the support to build the ppc64 LE kernel with our new v2 ABI. We previously supported v2 userspace but the kernel itself was a tougher nut to crack. This is now sorted mostly thanks to Anton and Rusty. We also have a fairly big series from Cedric that add support for 64-bit LE zImage boot wrapper. This was made harder by the fact that traditionally our zImage wrapper was always 32-bit, but our new LE toolchains don't really support 32-bit anymore (it's somewhat there but not really "supported") so we didn't want to rely on it. This meant more churn that just endian fixes. This brings some more LE bits as well, such as the ability to run in LE mode without a hypervisor (ie. under OPAL firmware) by doing the right OPAL call to reinitialize the CPU to take HV interrupts in the right mode and the usual pile of endian fixes. There's another series from Gavin adding EEH improvements (one day we *will* have a release with less than 20 EEH patches, I promise!). Another highlight is the support for the "Split core" functionality on P8 by Michael. This allows a P8 core to be split into "sub cores" of 4 threads which allows the subcores to run different guests under KVM (the HW still doesn't support a partition per thread). And then the usual misc bits and fixes ..." [ Further delayed by gmail deciding that BenH is a dirty spammer. Google knows. ] * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (155 commits) powerpc/powernv: Add missing include to LPC code selftests/powerpc: Test the THP bug we fixed in the previous commit powerpc/mm: Check paca psize is up to date for huge mappings powerpc/powernv: Pass buffer size to OPAL validate flash call powerpc/pseries: hcall functions are exported to modules, need _GLOBAL_TOC() powerpc: Exported functions __clear_user and copy_page use r2 so need _GLOBAL_TOC() powerpc/powernv: Set memory_block_size_bytes to 256MB powerpc: Allow ppc_md platform hook to override memory_block_size_bytes powerpc/powernv: Fix endian issues in memory error handling code powerpc/eeh: Skip eeh sysfs when eeh is disabled powerpc: 64bit sendfile is capped at 2GB powerpc/powernv: Provide debugfs access to the LPC bus via OPAL powerpc/serial: Use saner flags when creating legacy ports powerpc: Add cpu family documentation powerpc/xmon: Fix up xmon format strings powerpc/powernv: Add calls to support little endian host powerpc: Document sysfs DSCR interface powerpc: Fix regression of per-CPU DSCR setting powerpc: Split __SYSFS_SPRSETUP macro arch: powerpc/fadump: Cleaning up inconsistent NULL checks ...
1206 lines
27 KiB
C
1206 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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|
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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_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:
|
|
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
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|
case KVM_CAP_SW_TLB:
|
|
#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;
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
case KVM_CAP_SPAPR_TCE:
|
|
case KVM_CAP_PPC_ALLOC_HTAB:
|
|
case KVM_CAP_PPC_RTAS:
|
|
case KVM_CAP_PPC_FIXUP_HCALL:
|
|
#ifdef CONFIG_KVM_XICS
|
|
case KVM_CAP_IRQ_XICS:
|
|
#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
|
|
case KVM_CAP_PPC_SMT:
|
|
if (hv_enabled)
|
|
r = threads_per_subcore;
|
|
else
|
|
r = 0;
|
|
break;
|
|
case KVM_CAP_PPC_RMA:
|
|
r = hv_enabled;
|
|
/* PPC970 requires an RMA */
|
|
if (r && cpu_has_feature(CPU_FTR_ARCH_201))
|
|
r = 2;
|
|
break;
|
|
#endif
|
|
case KVM_CAP_SYNC_MMU:
|
|
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
|
|
if (hv_enabled)
|
|
r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
|
|
else
|
|
r = 0;
|
|
#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
|
|
r = 1;
|
|
#else
|
|
r = 0;
|
|
#endif
|
|
break;
|
|
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
|
|
case KVM_CAP_PPC_HTAB_FD:
|
|
r = hv_enabled;
|
|
break;
|
|
#endif
|
|
case KVM_CAP_NR_VCPUS:
|
|
/*
|
|
* Recommending a number of CPUs is somewhat arbitrary; we
|
|
* return the number of present CPUs for -HV (since a host
|
|
* will have secondary threads "offline"), and for other KVM
|
|
* implementations just count online CPUs.
|
|
*/
|
|
if (hv_enabled)
|
|
r = num_present_cpus();
|
|
else
|
|
r = num_online_cpus();
|
|
break;
|
|
case KVM_CAP_MAX_VCPUS:
|
|
r = KVM_MAX_VCPUS;
|
|
break;
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
case KVM_CAP_PPC_GET_SMMU_INFO:
|
|
r = 1;
|
|
break;
|
|
#endif
|
|
default:
|
|
r = 0;
|
|
break;
|
|
}
|
|
return r;
|
|
|
|
}
|
|
|
|
long kvm_arch_dev_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
|
|
struct kvm_memory_slot *dont)
|
|
{
|
|
kvmppc_core_free_memslot(kvm, free, dont);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
#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)
|
|
{
|
|
|
|
}
|