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https://github.com/Motorhead1991/qemu.git
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354ac20a36
At present, using the hypervisor aware Book3S-HV KVM will only work with qemu on POWER7 CPUs. PPC970 CPUs also have hypervisor capability, but they lack the VRMA feature which makes assigning guest memory easier. In order to allow KVM Book3S-HV on PPC970, we need to specially allocate the first chunk of guest memory (the "Real Mode Area" or RMA), so that it is physically contiguous. Sufficiently recent host kernels allow such contiguous RMAs to be allocated, with a kvm capability advertising whether the feature is available and/or necessary on this hardware. This patch enables qemu to use this support, thus allowing kvm acceleration of pseries qemu machines on PPC970 hardware. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de> --- agraf: fix to use memory api
87 lines
1.6 KiB
C
87 lines
1.6 KiB
C
/*
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* Copyright 2008 IBM Corporation.
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*
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* This work is licensed under the GNU GPL license version 2 or later.
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*
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*/
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#ifndef __KVM_PPC_H__
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#define __KVM_PPC_H__
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#include "memory.h"
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void kvmppc_init(void);
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#ifdef CONFIG_KVM
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uint32_t kvmppc_get_tbfreq(void);
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uint64_t kvmppc_get_clockfreq(void);
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int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len);
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int kvmppc_set_interrupt(CPUState *env, int irq, int level);
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void kvmppc_set_papr(CPUState *env);
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int kvmppc_smt_threads(void);
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off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem);
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#else
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static inline uint32_t kvmppc_get_tbfreq(void)
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{
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return 0;
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}
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static inline uint64_t kvmppc_get_clockfreq(void)
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{
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return 0;
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}
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static inline int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len)
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{
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return -1;
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}
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static inline int kvmppc_set_interrupt(CPUState *env, int irq, int level)
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{
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return -1;
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}
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static inline void kvmppc_set_papr(CPUState *env)
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{
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}
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static inline int kvmppc_smt_threads(void)
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{
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return 1;
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}
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static inline off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem)
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{
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return 0;
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}
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#endif
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#ifndef CONFIG_KVM
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#define kvmppc_eieio() do { } while (0)
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#else
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#define kvmppc_eieio() \
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do { \
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if (kvm_enabled()) { \
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asm volatile("eieio" : : : "memory"); \
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} \
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} while (0)
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#endif
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#ifndef KVM_INTERRUPT_SET
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#define KVM_INTERRUPT_SET -1
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#endif
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#ifndef KVM_INTERRUPT_UNSET
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#define KVM_INTERRUPT_UNSET -2
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#endif
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#ifndef KVM_INTERRUPT_SET_LEVEL
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#define KVM_INTERRUPT_SET_LEVEL -3
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#endif
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#endif /* __KVM_PPC_H__ */
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