1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
7 #include <linux/kvm_host.h>
8 #include <linux/preempt.h>
9 #include <linux/export.h>
10 #include <linux/sched.h>
11 #include <linux/spinlock.h>
12 #include <linux/init.h>
13 #include <linux/memblock.h>
14 #include <linux/sizes.h>
15 #include <linux/cma.h>
16 #include <linux/bitops.h>
18 #include <asm/asm-prototypes.h>
19 #include <asm/cputable.h>
20 #include <asm/kvm_ppc.h>
21 #include <asm/kvm_book3s.h>
22 #include <asm/archrandom.h>
25 #include <asm/dbell.h>
26 #include <asm/cputhreads.h>
31 #define KVM_CMA_CHUNK_ORDER 18
33 #include "book3s_xics.h"
34 #include "book3s_xive.h"
37 * The XIVE module will populate these when it loads
39 unsigned long (*__xive_vm_h_xirr)(struct kvm_vcpu *vcpu);
40 unsigned long (*__xive_vm_h_ipoll)(struct kvm_vcpu *vcpu, unsigned long server);
41 int (*__xive_vm_h_ipi)(struct kvm_vcpu *vcpu, unsigned long server,
43 int (*__xive_vm_h_cppr)(struct kvm_vcpu *vcpu, unsigned long cppr);
44 int (*__xive_vm_h_eoi)(struct kvm_vcpu *vcpu, unsigned long xirr);
45 EXPORT_SYMBOL_GPL(__xive_vm_h_xirr);
46 EXPORT_SYMBOL_GPL(__xive_vm_h_ipoll);
47 EXPORT_SYMBOL_GPL(__xive_vm_h_ipi);
48 EXPORT_SYMBOL_GPL(__xive_vm_h_cppr);
49 EXPORT_SYMBOL_GPL(__xive_vm_h_eoi);
52 * Hash page table alignment on newer cpus(CPU_FTR_ARCH_206)
53 * should be power of 2.
55 #define HPT_ALIGN_PAGES ((1 << 18) >> PAGE_SHIFT) /* 256k */
57 * By default we reserve 5% of memory for hash pagetable allocation.
59 static unsigned long kvm_cma_resv_ratio = 5;
61 static struct cma *kvm_cma;
63 static int __init early_parse_kvm_cma_resv(char *p)
65 pr_debug("%s(%s)\n", __func__, p);
68 return kstrtoul(p, 0, &kvm_cma_resv_ratio);
70 early_param("kvm_cma_resv_ratio", early_parse_kvm_cma_resv);
72 struct page *kvm_alloc_hpt_cma(unsigned long nr_pages)
74 VM_BUG_ON(order_base_2(nr_pages) < KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
76 return cma_alloc(kvm_cma, nr_pages, order_base_2(HPT_ALIGN_PAGES),
79 EXPORT_SYMBOL_GPL(kvm_alloc_hpt_cma);
81 void kvm_free_hpt_cma(struct page *page, unsigned long nr_pages)
83 cma_release(kvm_cma, page, nr_pages);
85 EXPORT_SYMBOL_GPL(kvm_free_hpt_cma);
88 * kvm_cma_reserve() - reserve area for kvm hash pagetable
90 * This function reserves memory from early allocator. It should be
91 * called by arch specific code once the memblock allocator
92 * has been activated and all other subsystems have already allocated/reserved
95 void __init kvm_cma_reserve(void)
97 unsigned long align_size;
98 struct memblock_region *reg;
99 phys_addr_t selected_size = 0;
102 * We need CMA reservation only when we are in HV mode
104 if (!cpu_has_feature(CPU_FTR_HVMODE))
107 * We cannot use memblock_phys_mem_size() here, because
108 * memblock_analyze() has not been called yet.
110 for_each_memblock(memory, reg)
111 selected_size += memblock_region_memory_end_pfn(reg) -
112 memblock_region_memory_base_pfn(reg);
114 selected_size = (selected_size * kvm_cma_resv_ratio / 100) << PAGE_SHIFT;
116 pr_info("%s: reserving %ld MiB for global area\n", __func__,
117 (unsigned long)selected_size / SZ_1M);
118 align_size = HPT_ALIGN_PAGES << PAGE_SHIFT;
119 cma_declare_contiguous(0, selected_size, 0, align_size,
120 KVM_CMA_CHUNK_ORDER - PAGE_SHIFT, false, "kvm_cma",
126 * Real-mode H_CONFER implementation.
127 * We check if we are the only vcpu out of this virtual core
128 * still running in the guest and not ceded. If so, we pop up
129 * to the virtual-mode implementation; if not, just return to
132 long int kvmppc_rm_h_confer(struct kvm_vcpu *vcpu, int target,
133 unsigned int yield_count)
135 struct kvmppc_vcore *vc = local_paca->kvm_hstate.kvm_vcore;
136 int ptid = local_paca->kvm_hstate.ptid;
139 int threads_conferring;
140 u64 stop = get_tb() + 10 * tb_ticks_per_usec;
141 int rv = H_SUCCESS; /* => don't yield */
143 set_bit(ptid, &vc->conferring_threads);
144 while ((get_tb() < stop) && !VCORE_IS_EXITING(vc)) {
145 threads_running = VCORE_ENTRY_MAP(vc);
146 threads_ceded = vc->napping_threads;
147 threads_conferring = vc->conferring_threads;
148 if ((threads_ceded | threads_conferring) == threads_running) {
149 rv = H_TOO_HARD; /* => do yield */
153 clear_bit(ptid, &vc->conferring_threads);
158 * When running HV mode KVM we need to block certain operations while KVM VMs
159 * exist in the system. We use a counter of VMs to track this.
161 * One of the operations we need to block is onlining of secondaries, so we
162 * protect hv_vm_count with get/put_online_cpus().
164 static atomic_t hv_vm_count;
166 void kvm_hv_vm_activated(void)
169 atomic_inc(&hv_vm_count);
172 EXPORT_SYMBOL_GPL(kvm_hv_vm_activated);
174 void kvm_hv_vm_deactivated(void)
177 atomic_dec(&hv_vm_count);
180 EXPORT_SYMBOL_GPL(kvm_hv_vm_deactivated);
182 bool kvm_hv_mode_active(void)
184 return atomic_read(&hv_vm_count) != 0;
187 extern int hcall_real_table[], hcall_real_table_end[];
189 int kvmppc_hcall_impl_hv_realmode(unsigned long cmd)
192 if (cmd < hcall_real_table_end - hcall_real_table &&
193 hcall_real_table[cmd])
198 EXPORT_SYMBOL_GPL(kvmppc_hcall_impl_hv_realmode);
200 int kvmppc_hwrng_present(void)
202 return powernv_hwrng_present();
204 EXPORT_SYMBOL_GPL(kvmppc_hwrng_present);
206 long kvmppc_h_random(struct kvm_vcpu *vcpu)
210 /* Only need to do the expensive mfmsr() on radix */
211 if (kvm_is_radix(vcpu->kvm) && (mfmsr() & MSR_IR))
212 r = powernv_get_random_long(&vcpu->arch.regs.gpr[4]);
214 r = powernv_get_random_real_mode(&vcpu->arch.regs.gpr[4]);
222 * Send an interrupt or message to another CPU.
223 * The caller needs to include any barrier needed to order writes
224 * to memory vs. the IPI/message.
226 void kvmhv_rm_send_ipi(int cpu)
228 void __iomem *xics_phys;
229 unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER);
231 /* For a nested hypervisor, use the XICS via hcall */
232 if (kvmhv_on_pseries()) {
233 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
235 plpar_hcall_raw(H_IPI, retbuf, get_hard_smp_processor_id(cpu),
240 /* On POWER9 we can use msgsnd for any destination cpu. */
241 if (cpu_has_feature(CPU_FTR_ARCH_300)) {
242 msg |= get_hard_smp_processor_id(cpu);
243 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
247 /* On POWER8 for IPIs to threads in the same core, use msgsnd. */
248 if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
249 cpu_first_thread_sibling(cpu) ==
250 cpu_first_thread_sibling(raw_smp_processor_id())) {
251 msg |= cpu_thread_in_core(cpu);
252 __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg));
256 /* We should never reach this */
257 if (WARN_ON_ONCE(xics_on_xive()))
260 /* Else poke the target with an IPI */
261 xics_phys = paca_ptrs[cpu]->kvm_hstate.xics_phys;
263 __raw_rm_writeb(IPI_PRIORITY, xics_phys + XICS_MFRR);
265 opal_int_set_mfrr(get_hard_smp_processor_id(cpu), IPI_PRIORITY);
269 * The following functions are called from the assembly code
270 * in book3s_hv_rmhandlers.S.
272 static void kvmhv_interrupt_vcore(struct kvmppc_vcore *vc, int active)
276 /* Order setting of exit map vs. msgsnd/IPI */
278 for (; active; active >>= 1, ++cpu)
280 kvmhv_rm_send_ipi(cpu);
283 void kvmhv_commence_exit(int trap)
285 struct kvmppc_vcore *vc = local_paca->kvm_hstate.kvm_vcore;
286 int ptid = local_paca->kvm_hstate.ptid;
287 struct kvm_split_mode *sip = local_paca->kvm_hstate.kvm_split_mode;
291 /* Set our bit in the threads-exiting-guest map in the 0xff00
292 bits of vcore->entry_exit_map */
295 ee = vc->entry_exit_map;
296 } while (cmpxchg(&vc->entry_exit_map, ee, ee | me) != ee);
298 /* Are we the first here? */
303 * Trigger the other threads in this vcore to exit the guest.
304 * If this is a hypervisor decrementer interrupt then they
305 * will be already on their way out of the guest.
307 if (trap != BOOK3S_INTERRUPT_HV_DECREMENTER)
308 kvmhv_interrupt_vcore(vc, ee & ~(1 << ptid));
311 * If we are doing dynamic micro-threading, interrupt the other
312 * subcores to pull them out of their guests too.
317 for (i = 0; i < MAX_SUBCORES; ++i) {
322 ee = vc->entry_exit_map;
323 /* Already asked to exit? */
326 } while (cmpxchg(&vc->entry_exit_map, ee,
327 ee | VCORE_EXIT_REQ) != ee);
329 kvmhv_interrupt_vcore(vc, ee);
333 * On POWER9 when running a HPT guest on a radix host (sip != NULL),
334 * we have to interrupt inactive CPU threads to get them to
335 * restore the host LPCR value.
338 if (cmpxchg(&sip->do_restore, 0, 1) == 0) {
339 vc = local_paca->kvm_hstate.kvm_vcore;
340 cpu0 = vc->pcpu + ptid - local_paca->kvm_hstate.tid;
341 for (t = 1; t < threads_per_core; ++t) {
343 kvmhv_rm_send_ipi(cpu0 + t);
349 struct kvmppc_host_rm_ops *kvmppc_host_rm_ops_hv;
350 EXPORT_SYMBOL_GPL(kvmppc_host_rm_ops_hv);
352 #ifdef CONFIG_KVM_XICS
353 static struct kvmppc_irq_map *get_irqmap(struct kvmppc_passthru_irqmap *pimap,
359 * We access the mapped array here without a lock. That
360 * is safe because we never reduce the number of entries
361 * in the array and we never change the v_hwirq field of
362 * an entry once it is set.
364 * We have also carefully ordered the stores in the writer
365 * and the loads here in the reader, so that if we find a matching
366 * hwirq here, the associated GSI and irq_desc fields are valid.
368 for (i = 0; i < pimap->n_mapped; i++) {
369 if (xisr == pimap->mapped[i].r_hwirq) {
371 * Order subsequent reads in the caller to serialize
375 return &pimap->mapped[i];
382 * If we have an interrupt that's not an IPI, check if we have a
383 * passthrough adapter and if so, check if this external interrupt
384 * is for the adapter.
385 * We will attempt to deliver the IRQ directly to the target VCPU's
386 * ICP, the virtual ICP (based on affinity - the xive value in ICS).
388 * If the delivery fails or if this is not for a passthrough adapter,
389 * return to the host to handle this interrupt. We earlier
390 * saved a copy of the XIRR in the PACA, it will be picked up by
391 * the host ICP driver.
393 static int kvmppc_check_passthru(u32 xisr, __be32 xirr, bool *again)
395 struct kvmppc_passthru_irqmap *pimap;
396 struct kvmppc_irq_map *irq_map;
397 struct kvm_vcpu *vcpu;
399 vcpu = local_paca->kvm_hstate.kvm_vcpu;
402 pimap = kvmppc_get_passthru_irqmap(vcpu->kvm);
405 irq_map = get_irqmap(pimap, xisr);
409 /* We're handling this interrupt, generic code doesn't need to */
410 local_paca->kvm_hstate.saved_xirr = 0;
412 return kvmppc_deliver_irq_passthru(vcpu, xirr, irq_map, pimap, again);
416 static inline int kvmppc_check_passthru(u32 xisr, __be32 xirr, bool *again)
423 * Determine what sort of external interrupt is pending (if any).
425 * 0 if no interrupt is pending
426 * 1 if an interrupt is pending that needs to be handled by the host
427 * 2 Passthrough that needs completion in the host
428 * -1 if there was a guest wakeup IPI (which has now been cleared)
429 * -2 if there is PCI passthrough external interrupt that was handled
431 static long kvmppc_read_one_intr(bool *again);
433 long kvmppc_read_intr(void)
444 rc = kvmppc_read_one_intr(&again);
445 if (rc && (ret == 0 || rc > ret))
451 static long kvmppc_read_one_intr(bool *again)
453 void __iomem *xics_phys;
463 /* see if a host IPI is pending */
464 host_ipi = local_paca->kvm_hstate.host_ipi;
468 /* Now read the interrupt from the ICP */
469 if (kvmhv_on_pseries()) {
470 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
472 rc = plpar_hcall_raw(H_XIRR, retbuf, 0xFF);
473 xirr = cpu_to_be32(retbuf[0]);
475 xics_phys = local_paca->kvm_hstate.xics_phys;
478 rc = opal_int_get_xirr(&xirr, false);
480 xirr = __raw_rm_readl(xics_phys + XICS_XIRR);
486 * Save XIRR for later. Since we get control in reverse endian
487 * on LE systems, save it byte reversed and fetch it back in
488 * host endian. Note that xirr is the value read from the
489 * XIRR register, while h_xirr is the host endian version.
491 h_xirr = be32_to_cpu(xirr);
492 local_paca->kvm_hstate.saved_xirr = h_xirr;
493 xisr = h_xirr & 0xffffff;
495 * Ensure that the store/load complete to guarantee all side
496 * effects of loading from XIRR has completed
500 /* if nothing pending in the ICP */
504 /* We found something in the ICP...
506 * If it is an IPI, clear the MFRR and EOI it.
508 if (xisr == XICS_IPI) {
510 if (kvmhv_on_pseries()) {
511 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
513 plpar_hcall_raw(H_IPI, retbuf,
514 hard_smp_processor_id(), 0xff);
515 plpar_hcall_raw(H_EOI, retbuf, h_xirr);
516 } else if (xics_phys) {
517 __raw_rm_writeb(0xff, xics_phys + XICS_MFRR);
518 __raw_rm_writel(xirr, xics_phys + XICS_XIRR);
520 opal_int_set_mfrr(hard_smp_processor_id(), 0xff);
521 rc = opal_int_eoi(h_xirr);
523 /* If rc > 0, there is another interrupt pending */
527 * Need to ensure side effects of above stores
528 * complete before proceeding.
533 * We need to re-check host IPI now in case it got set in the
534 * meantime. If it's clear, we bounce the interrupt to the
537 host_ipi = local_paca->kvm_hstate.host_ipi;
538 if (unlikely(host_ipi != 0)) {
539 /* We raced with the host,
540 * we need to resend that IPI, bummer
542 if (kvmhv_on_pseries()) {
543 unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
545 plpar_hcall_raw(H_IPI, retbuf,
546 hard_smp_processor_id(),
548 } else if (xics_phys)
549 __raw_rm_writeb(IPI_PRIORITY,
550 xics_phys + XICS_MFRR);
552 opal_int_set_mfrr(hard_smp_processor_id(),
554 /* Let side effects complete */
559 /* OK, it's an IPI for us */
560 local_paca->kvm_hstate.saved_xirr = 0;
564 return kvmppc_check_passthru(xisr, xirr, again);
567 #ifdef CONFIG_KVM_XICS
568 static inline bool is_rm(void)
570 return !(mfmsr() & MSR_DR);
573 unsigned long kvmppc_rm_h_xirr(struct kvm_vcpu *vcpu)
575 if (!kvmppc_xics_enabled(vcpu))
577 if (xics_on_xive()) {
579 return xive_rm_h_xirr(vcpu);
580 if (unlikely(!__xive_vm_h_xirr))
581 return H_NOT_AVAILABLE;
582 return __xive_vm_h_xirr(vcpu);
584 return xics_rm_h_xirr(vcpu);
587 unsigned long kvmppc_rm_h_xirr_x(struct kvm_vcpu *vcpu)
589 if (!kvmppc_xics_enabled(vcpu))
591 vcpu->arch.regs.gpr[5] = get_tb();
592 if (xics_on_xive()) {
594 return xive_rm_h_xirr(vcpu);
595 if (unlikely(!__xive_vm_h_xirr))
596 return H_NOT_AVAILABLE;
597 return __xive_vm_h_xirr(vcpu);
599 return xics_rm_h_xirr(vcpu);
602 unsigned long kvmppc_rm_h_ipoll(struct kvm_vcpu *vcpu, unsigned long server)
604 if (!kvmppc_xics_enabled(vcpu))
606 if (xics_on_xive()) {
608 return xive_rm_h_ipoll(vcpu, server);
609 if (unlikely(!__xive_vm_h_ipoll))
610 return H_NOT_AVAILABLE;
611 return __xive_vm_h_ipoll(vcpu, server);
616 int kvmppc_rm_h_ipi(struct kvm_vcpu *vcpu, unsigned long server,
619 if (!kvmppc_xics_enabled(vcpu))
621 if (xics_on_xive()) {
623 return xive_rm_h_ipi(vcpu, server, mfrr);
624 if (unlikely(!__xive_vm_h_ipi))
625 return H_NOT_AVAILABLE;
626 return __xive_vm_h_ipi(vcpu, server, mfrr);
628 return xics_rm_h_ipi(vcpu, server, mfrr);
631 int kvmppc_rm_h_cppr(struct kvm_vcpu *vcpu, unsigned long cppr)
633 if (!kvmppc_xics_enabled(vcpu))
635 if (xics_on_xive()) {
637 return xive_rm_h_cppr(vcpu, cppr);
638 if (unlikely(!__xive_vm_h_cppr))
639 return H_NOT_AVAILABLE;
640 return __xive_vm_h_cppr(vcpu, cppr);
642 return xics_rm_h_cppr(vcpu, cppr);
645 int kvmppc_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr)
647 if (!kvmppc_xics_enabled(vcpu))
649 if (xics_on_xive()) {
651 return xive_rm_h_eoi(vcpu, xirr);
652 if (unlikely(!__xive_vm_h_eoi))
653 return H_NOT_AVAILABLE;
654 return __xive_vm_h_eoi(vcpu, xirr);
656 return xics_rm_h_eoi(vcpu, xirr);
658 #endif /* CONFIG_KVM_XICS */
660 void kvmppc_bad_interrupt(struct pt_regs *regs)
663 * 100 could happen at any time, 200 can happen due to invalid real
664 * address access for example (or any time due to a hardware problem).
666 if (TRAP(regs) == 0x100) {
667 get_paca()->in_nmi++;
668 system_reset_exception(regs);
669 get_paca()->in_nmi--;
670 } else if (TRAP(regs) == 0x200) {
671 machine_check_exception(regs);
673 die("Bad interrupt in KVM entry/exit code", regs, SIGABRT);
675 panic("Bad KVM trap");
679 * Functions used to switch LPCR HR and UPRT bits on all threads
680 * when entering and exiting HPT guests on a radix host.
683 #define PHASE_REALMODE 1 /* in real mode */
684 #define PHASE_SET_LPCR 2 /* have set LPCR */
685 #define PHASE_OUT_OF_GUEST 4 /* have finished executing in guest */
686 #define PHASE_RESET_LPCR 8 /* have reset LPCR to host value */
688 #define ALL(p) (((p) << 24) | ((p) << 16) | ((p) << 8) | (p))
690 static void wait_for_sync(struct kvm_split_mode *sip, int phase)
692 int thr = local_paca->kvm_hstate.tid;
694 sip->lpcr_sync.phase[thr] |= phase;
696 while ((sip->lpcr_sync.allphases & phase) != phase) {
703 void kvmhv_p9_set_lpcr(struct kvm_split_mode *sip)
705 unsigned long rb, set;
707 /* wait for every other thread to get to real mode */
708 wait_for_sync(sip, PHASE_REALMODE);
710 /* Set LPCR and LPIDR */
711 mtspr(SPRN_LPCR, sip->lpcr_req);
712 mtspr(SPRN_LPID, sip->lpidr_req);
715 /* Invalidate the TLB on thread 0 */
716 if (local_paca->kvm_hstate.tid == 0) {
718 asm volatile("ptesync" : : : "memory");
719 for (set = 0; set < POWER9_TLB_SETS_RADIX; ++set) {
720 rb = TLBIEL_INVAL_SET_LPID +
721 (set << TLBIEL_INVAL_SET_SHIFT);
722 asm volatile(PPC_TLBIEL(%0, %1, 0, 0, 0) : :
725 asm volatile("ptesync" : : : "memory");
728 /* indicate that we have done so and wait for others */
729 wait_for_sync(sip, PHASE_SET_LPCR);
730 /* order read of sip->lpcr_sync.allphases vs. sip->do_set */
735 * Called when a thread that has been in the guest needs
736 * to reload the host LPCR value - but only on POWER9 when
737 * running a HPT guest on a radix host.
739 void kvmhv_p9_restore_lpcr(struct kvm_split_mode *sip)
741 /* we're out of the guest... */
742 wait_for_sync(sip, PHASE_OUT_OF_GUEST);
745 mtspr(SPRN_LPCR, sip->host_lpcr);
748 if (local_paca->kvm_hstate.tid == 0) {
750 smp_wmb(); /* order store of do_restore vs. phase */
753 wait_for_sync(sip, PHASE_RESET_LPCR);
755 local_paca->kvm_hstate.kvm_split_mode = NULL;
758 static void kvmppc_end_cede(struct kvm_vcpu *vcpu)
760 vcpu->arch.ceded = 0;
761 if (vcpu->arch.timer_running) {
762 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
763 vcpu->arch.timer_running = 0;
767 void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr)
770 * Check for illegal transactional state bit combination
771 * and if we find it, force the TS field to a safe state.
773 if ((msr & MSR_TS_MASK) == MSR_TS_MASK)
775 vcpu->arch.shregs.msr = msr;
776 kvmppc_end_cede(vcpu);
778 EXPORT_SYMBOL_GPL(kvmppc_set_msr_hv);
780 static void inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags)
782 unsigned long msr, pc, new_msr, new_pc;
784 msr = kvmppc_get_msr(vcpu);
785 pc = kvmppc_get_pc(vcpu);
786 new_msr = vcpu->arch.intr_msr;
789 /* If transactional, change to suspend mode on IRQ delivery */
790 if (MSR_TM_TRANSACTIONAL(msr))
793 new_msr |= msr & MSR_TS_MASK;
796 * Perform MSR and PC adjustment for LPCR[AIL]=3 if it is set and
797 * applicable. AIL=2 is not supported.
799 * AIL does not apply to SRESET, MCE, or HMI (which is never
800 * delivered to the guest), and does not apply if IR=0 or DR=0.
802 if (vec != BOOK3S_INTERRUPT_SYSTEM_RESET &&
803 vec != BOOK3S_INTERRUPT_MACHINE_CHECK &&
804 (vcpu->arch.vcore->lpcr & LPCR_AIL) == LPCR_AIL_3 &&
805 (msr & (MSR_IR|MSR_DR)) == (MSR_IR|MSR_DR) ) {
806 new_msr |= MSR_IR | MSR_DR;
807 new_pc += 0xC000000000004000ULL;
810 kvmppc_set_srr0(vcpu, pc);
811 kvmppc_set_srr1(vcpu, (msr & SRR1_MSR_BITS) | srr1_flags);
812 kvmppc_set_pc(vcpu, new_pc);
813 vcpu->arch.shregs.msr = new_msr;
816 void kvmppc_inject_interrupt_hv(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags)
818 inject_interrupt(vcpu, vec, srr1_flags);
819 kvmppc_end_cede(vcpu);
821 EXPORT_SYMBOL_GPL(kvmppc_inject_interrupt_hv);
824 * Is there a PRIV_DOORBELL pending for the guest (on POWER9)?
825 * Can we inject a Decrementer or a External interrupt?
827 void kvmppc_guest_entry_inject_int(struct kvm_vcpu *vcpu)
832 /* Insert EXTERNAL bit into LPCR at the MER bit position */
833 ext = (vcpu->arch.pending_exceptions >> BOOK3S_IRQPRIO_EXTERNAL) & 1;
834 lpcr = mfspr(SPRN_LPCR);
835 lpcr |= ext << LPCR_MER_SH;
836 mtspr(SPRN_LPCR, lpcr);
839 if (vcpu->arch.shregs.msr & MSR_EE) {
841 inject_interrupt(vcpu, BOOK3S_INTERRUPT_EXTERNAL, 0);
843 long int dec = mfspr(SPRN_DEC);
844 if (!(lpcr & LPCR_LD))
847 inject_interrupt(vcpu,
848 BOOK3S_INTERRUPT_DECREMENTER, 0);
852 if (vcpu->arch.doorbell_request) {
853 mtspr(SPRN_DPDES, 1);
854 vcpu->arch.vcore->dpdes = 1;
856 vcpu->arch.doorbell_request = 0;
860 static void flush_guest_tlb(struct kvm *kvm)
862 unsigned long rb, set;
864 rb = PPC_BIT(52); /* IS = 2 */
865 if (kvm_is_radix(kvm)) {
866 /* R=1 PRS=1 RIC=2 */
867 asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
868 : : "r" (rb), "i" (1), "i" (1), "i" (2),
870 for (set = 1; set < kvm->arch.tlb_sets; ++set) {
871 rb += PPC_BIT(51); /* increment set number */
872 /* R=1 PRS=1 RIC=0 */
873 asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
874 : : "r" (rb), "i" (1), "i" (1), "i" (0),
877 asm volatile("ptesync": : :"memory");
878 asm volatile(PPC_RADIX_INVALIDATE_ERAT_GUEST : : :"memory");
880 for (set = 0; set < kvm->arch.tlb_sets; ++set) {
881 /* R=0 PRS=0 RIC=0 */
882 asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
883 : : "r" (rb), "i" (0), "i" (0), "i" (0),
885 rb += PPC_BIT(51); /* increment set number */
887 asm volatile("ptesync": : :"memory");
888 asm volatile(PPC_ISA_3_0_INVALIDATE_ERAT : : :"memory");
892 void kvmppc_check_need_tlb_flush(struct kvm *kvm, int pcpu,
893 struct kvm_nested_guest *nested)
895 cpumask_t *need_tlb_flush;
898 * On POWER9, individual threads can come in here, but the
899 * TLB is shared between the 4 threads in a core, hence
900 * invalidating on one thread invalidates for all.
901 * Thus we make all 4 threads use the same bit.
903 if (cpu_has_feature(CPU_FTR_ARCH_300))
904 pcpu = cpu_first_thread_sibling(pcpu);
907 need_tlb_flush = &nested->need_tlb_flush;
909 need_tlb_flush = &kvm->arch.need_tlb_flush;
911 if (cpumask_test_cpu(pcpu, need_tlb_flush)) {
912 flush_guest_tlb(kvm);
914 /* Clear the bit after the TLB flush */
915 cpumask_clear_cpu(pcpu, need_tlb_flush);
918 EXPORT_SYMBOL_GPL(kvmppc_check_need_tlb_flush);