2008-04-17 12:28:09 +08:00
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/*
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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. 2008
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#ifndef __POWERPC_KVM_PPC_H__
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#define __POWERPC_KVM_PPC_H__
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/* This file exists just so we can dereference kvm_vcpu, avoiding nested header
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* dependencies. */
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#include <linux/mutex.h>
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#include <linux/timer.h>
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#include <linux/types.h>
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#include <linux/kvm_types.h>
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#include <linux/kvm_host.h>
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2010-01-15 21:49:12 +08:00
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#ifdef CONFIG_PPC_BOOK3S
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#include <asm/kvm_book3s.h>
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2010-04-16 06:11:40 +08:00
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#else
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#include <asm/kvm_booke.h>
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2010-01-15 21:49:12 +08:00
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#endif
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2008-04-17 12:28:09 +08:00
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enum emulation_result {
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EMULATE_DONE, /* no further processing */
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EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
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EMULATE_DO_DCR, /* kvm_run filled with DCR request */
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EMULATE_FAIL, /* can't emulate this instruction */
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2010-02-19 18:00:31 +08:00
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EMULATE_AGAIN, /* something went wrong. go again */
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2008-04-17 12:28:09 +08:00
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};
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2011-06-29 08:19:50 +08:00
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extern int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
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2008-04-17 12:28:09 +08:00
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extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
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extern char kvmppc_handlers_start[];
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extern unsigned long kvmppc_handler_len;
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2009-10-30 13:47:07 +08:00
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extern void kvmppc_handler_highmem(void);
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2008-04-17 12:28:09 +08:00
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extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
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extern int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
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unsigned int rt, unsigned int bytes,
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int is_bigendian);
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2010-02-19 18:00:30 +08:00
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extern int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
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unsigned int rt, unsigned int bytes,
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int is_bigendian);
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2008-04-17 12:28:09 +08:00
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extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
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2010-02-19 18:00:29 +08:00
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u64 val, unsigned int bytes, int is_bigendian);
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2008-04-17 12:28:09 +08:00
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extern int kvmppc_emulate_instruction(struct kvm_run *run,
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struct kvm_vcpu *vcpu);
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2008-05-22 07:22:51 +08:00
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extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
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2008-11-05 23:36:16 +08:00
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extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu);
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2011-04-28 06:24:21 +08:00
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extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb);
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2008-04-17 12:28:09 +08:00
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2009-01-04 06:22:59 +08:00
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/* Core-specific hooks */
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2008-12-03 05:51:53 +08:00
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extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
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2008-12-03 05:51:55 +08:00
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unsigned int gtlb_idx);
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2008-04-17 12:28:09 +08:00
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extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
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2008-07-26 02:54:53 +08:00
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extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
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2009-01-04 06:22:59 +08:00
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extern void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu);
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2010-04-16 06:11:45 +08:00
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extern int kvmppc_mmu_init(struct kvm_vcpu *vcpu);
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2009-01-04 06:23:03 +08:00
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extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
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extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
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2009-01-04 06:23:02 +08:00
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extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
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gva_t eaddr);
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2009-01-04 06:23:11 +08:00
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extern void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu);
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extern void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu);
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2008-11-05 23:36:14 +08:00
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2008-11-05 23:36:18 +08:00
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extern struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm,
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unsigned int id);
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extern void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu);
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2008-11-05 23:36:17 +08:00
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extern int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu);
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2008-11-05 23:36:14 +08:00
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extern int kvmppc_core_check_processor_compat(void);
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2008-11-05 23:36:17 +08:00
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extern int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
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struct kvm_translation *tr);
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2008-11-05 23:36:14 +08:00
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extern void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
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extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
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extern void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu);
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extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
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2010-01-08 09:58:07 +08:00
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extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags);
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2008-11-05 23:36:14 +08:00
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extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
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2009-12-22 03:21:24 +08:00
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extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu);
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2008-11-05 23:36:14 +08:00
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extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
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struct kvm_interrupt *irq);
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2010-03-25 04:48:18 +08:00
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extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
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struct kvm_interrupt *irq);
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2008-11-05 23:36:14 +08:00
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2008-11-05 23:36:16 +08:00
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extern int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
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unsigned int op, int *advance);
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extern int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs);
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extern int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt);
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2008-11-05 23:36:18 +08:00
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extern int kvmppc_booke_init(void);
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extern void kvmppc_booke_exit(void);
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2008-11-25 01:37:38 +08:00
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extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
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2010-07-29 20:47:48 +08:00
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extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
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2011-06-15 07:34:41 +08:00
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extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
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2008-11-25 01:37:38 +08:00
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KVM: PPC: Add support for Book3S processors in hypervisor mode
This adds support for KVM running on 64-bit Book 3S processors,
specifically POWER7, in hypervisor mode. Using hypervisor mode means
that the guest can use the processor's supervisor mode. That means
that the guest can execute privileged instructions and access privileged
registers itself without trapping to the host. This gives excellent
performance, but does mean that KVM cannot emulate a processor
architecture other than the one that the hardware implements.
This code assumes that the guest is running paravirtualized using the
PAPR (Power Architecture Platform Requirements) interface, which is the
interface that IBM's PowerVM hypervisor uses. That means that existing
Linux distributions that run on IBM pSeries machines will also run
under KVM without modification. In order to communicate the PAPR
hypercalls to qemu, this adds a new KVM_EXIT_PAPR_HCALL exit code
to include/linux/kvm.h.
Currently the choice between book3s_hv support and book3s_pr support
(i.e. the existing code, which runs the guest in user mode) has to be
made at kernel configuration time, so a given kernel binary can only
do one or the other.
This new book3s_hv code doesn't support MMIO emulation at present.
Since we are running paravirtualized guests, this isn't a serious
restriction.
With the guest running in supervisor mode, most exceptions go straight
to the guest. We will never get data or instruction storage or segment
interrupts, alignment interrupts, decrementer interrupts, program
interrupts, single-step interrupts, etc., coming to the hypervisor from
the guest. Therefore this introduces a new KVMTEST_NONHV macro for the
exception entry path so that we don't have to do the KVM test on entry
to those exception handlers.
We do however get hypervisor decrementer, hypervisor data storage,
hypervisor instruction storage, and hypervisor emulation assist
interrupts, so we have to handle those.
In hypervisor mode, real-mode accesses can access all of RAM, not just
a limited amount. Therefore we put all the guest state in the vcpu.arch
and use the shadow_vcpu in the PACA only for temporary scratch space.
We allocate the vcpu with kzalloc rather than vzalloc, and we don't use
anything in the kvmppc_vcpu_book3s struct, so we don't allocate it.
We don't have a shared page with the guest, but we still need a
kvm_vcpu_arch_shared struct to store the values of various registers,
so we include one in the vcpu_arch struct.
The POWER7 processor has a restriction that all threads in a core have
to be in the same partition. MMU-on kernel code counts as a partition
(partition 0), so we have to do a partition switch on every entry to and
exit from the guest. At present we require the host and guest to run
in single-thread mode because of this hardware restriction.
This code allocates a hashed page table for the guest and initializes
it with HPTEs for the guest's Virtual Real Memory Area (VRMA). We
require that the guest memory is allocated using 16MB huge pages, in
order to simplify the low-level memory management. This also means that
we can get away without tracking paging activity in the host for now,
since huge pages can't be paged or swapped.
This also adds a few new exports needed by the book3s_hv code.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2011-06-29 08:21:34 +08:00
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extern long kvmppc_alloc_hpt(struct kvm *kvm);
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extern void kvmppc_free_hpt(struct kvm *kvm);
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extern long kvmppc_prepare_vrma(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem);
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extern void kvmppc_map_vrma(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem);
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2011-06-29 08:22:05 +08:00
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extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);
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2011-06-29 08:22:41 +08:00
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extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
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struct kvm_create_spapr_tce *args);
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2011-06-29 08:19:22 +08:00
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extern int kvmppc_core_init_vm(struct kvm *kvm);
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extern void kvmppc_core_destroy_vm(struct kvm *kvm);
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extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem);
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extern void kvmppc_core_commit_memory_region(struct kvm *kvm,
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struct kvm_userspace_memory_region *mem);
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2010-02-19 18:00:42 +08:00
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/*
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* Cuts out inst bits with ordering according to spec.
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* That means the leftmost bit is zero. All given bits are included.
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*/
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static inline u32 kvmppc_get_field(u64 inst, int msb, int lsb)
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{
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u32 r;
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u32 mask;
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BUG_ON(msb > lsb);
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mask = (1 << (lsb - msb + 1)) - 1;
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r = (inst >> (63 - lsb)) & mask;
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return r;
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}
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/*
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* Replaces inst bits with ordering according to spec.
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*/
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static inline u32 kvmppc_set_field(u64 inst, int msb, int lsb, int value)
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{
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u32 r;
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u32 mask;
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BUG_ON(msb > lsb);
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mask = ((1 << (lsb - msb + 1)) - 1) << (63 - lsb);
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r = (inst & ~mask) | ((value << (63 - lsb)) & mask);
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return r;
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}
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2011-04-28 06:24:21 +08:00
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void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
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int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
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void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
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int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
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void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid);
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2008-04-17 12:28:09 +08:00
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#endif /* __POWERPC_KVM_PPC_H__ */
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