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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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bbf45ba57e
This functionality is definitely experimental, but is capable of running unmodified PowerPC 440 Linux kernels as guests on a PowerPC 440 host. (Only tested with 440EP "Bamboo" guests so far, but with appropriate userspace support other SoC/board combinations should work.) See Documentation/powerpc/kvm_440.txt for technical details. [stephen: build fix] Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
92 lines
2.4 KiB
C
92 lines
2.4 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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*/
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#ifndef __KVM_POWERPC_TLB_H__
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#define __KVM_POWERPC_TLB_H__
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#include <linux/kvm_host.h>
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#include <asm/mmu-44x.h>
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extern int kvmppc_44x_tlb_index(struct kvm_vcpu *vcpu, gva_t eaddr,
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unsigned int pid, unsigned int as);
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extern struct tlbe *kvmppc_44x_dtlb_search(struct kvm_vcpu *vcpu, gva_t eaddr);
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extern struct tlbe *kvmppc_44x_itlb_search(struct kvm_vcpu *vcpu, gva_t eaddr);
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/* TLB helper functions */
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static inline unsigned int get_tlb_size(const struct tlbe *tlbe)
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{
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return (tlbe->word0 >> 4) & 0xf;
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}
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static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe)
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{
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return tlbe->word0 & 0xfffffc00;
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}
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static inline gva_t get_tlb_bytes(const struct tlbe *tlbe)
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{
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unsigned int pgsize = get_tlb_size(tlbe);
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return 1 << 10 << (pgsize << 1);
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}
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static inline gva_t get_tlb_end(const struct tlbe *tlbe)
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{
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return get_tlb_eaddr(tlbe) + get_tlb_bytes(tlbe) - 1;
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}
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static inline u64 get_tlb_raddr(const struct tlbe *tlbe)
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{
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u64 word1 = tlbe->word1;
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return ((word1 & 0xf) << 32) | (word1 & 0xfffffc00);
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}
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static inline unsigned int get_tlb_tid(const struct tlbe *tlbe)
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{
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return tlbe->tid & 0xff;
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}
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static inline unsigned int get_tlb_ts(const struct tlbe *tlbe)
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{
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return (tlbe->word0 >> 8) & 0x1;
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}
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static inline unsigned int get_tlb_v(const struct tlbe *tlbe)
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{
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return (tlbe->word0 >> 9) & 0x1;
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}
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static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.mmucr & 0xff;
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}
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static inline unsigned int get_mmucr_sts(const struct kvm_vcpu *vcpu)
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{
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return (vcpu->arch.mmucr >> 16) & 0x1;
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}
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static inline gpa_t tlb_xlate(struct tlbe *tlbe, gva_t eaddr)
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{
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unsigned int pgmask = get_tlb_bytes(tlbe) - 1;
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return get_tlb_raddr(tlbe) | (eaddr & pgmask);
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}
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#endif /* __KVM_POWERPC_TLB_H__ */
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