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author | Hollis Blanchard <hollisb@us.ibm.com> | 2008-04-16 23:28:09 -0500 |
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committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 18:21:39 +0300 |
commit | bbf45ba57eaec56569918a8bab96ab653bd45ec1 (patch) | |
tree | 63c53b1c1d93ec6559c7695c16b2345238e270f5 /arch/powerpc/kvm/44x_tlb.h | |
parent | 513014b717203d1d689652d0fda86eee959a6a8a (diff) | |
download | linux-bbf45ba57eaec56569918a8bab96ab653bd45ec1.tar.bz2 |
KVM: ppc: PowerPC 440 KVM implementation
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>
Diffstat (limited to 'arch/powerpc/kvm/44x_tlb.h')
-rw-r--r-- | arch/powerpc/kvm/44x_tlb.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/44x_tlb.h b/arch/powerpc/kvm/44x_tlb.h new file mode 100644 index 000000000000..2ccd46b6f6b7 --- /dev/null +++ b/arch/powerpc/kvm/44x_tlb.h @@ -0,0 +1,91 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright IBM Corp. 2007 + * + * Authors: Hollis Blanchard <hollisb@us.ibm.com> + */ + +#ifndef __KVM_POWERPC_TLB_H__ +#define __KVM_POWERPC_TLB_H__ + +#include <linux/kvm_host.h> +#include <asm/mmu-44x.h> + +extern int kvmppc_44x_tlb_index(struct kvm_vcpu *vcpu, gva_t eaddr, + unsigned int pid, unsigned int as); +extern struct tlbe *kvmppc_44x_dtlb_search(struct kvm_vcpu *vcpu, gva_t eaddr); +extern struct tlbe *kvmppc_44x_itlb_search(struct kvm_vcpu *vcpu, gva_t eaddr); + +/* TLB helper functions */ +static inline unsigned int get_tlb_size(const struct tlbe *tlbe) +{ + return (tlbe->word0 >> 4) & 0xf; +} + +static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe) +{ + return tlbe->word0 & 0xfffffc00; +} + +static inline gva_t get_tlb_bytes(const struct tlbe *tlbe) +{ + unsigned int pgsize = get_tlb_size(tlbe); + return 1 << 10 << (pgsize << 1); +} + +static inline gva_t get_tlb_end(const struct tlbe *tlbe) +{ + return get_tlb_eaddr(tlbe) + get_tlb_bytes(tlbe) - 1; +} + +static inline u64 get_tlb_raddr(const struct tlbe *tlbe) +{ + u64 word1 = tlbe->word1; + return ((word1 & 0xf) << 32) | (word1 & 0xfffffc00); +} + +static inline unsigned int get_tlb_tid(const struct tlbe *tlbe) +{ + return tlbe->tid & 0xff; +} + +static inline unsigned int get_tlb_ts(const struct tlbe *tlbe) +{ + return (tlbe->word0 >> 8) & 0x1; +} + +static inline unsigned int get_tlb_v(const struct tlbe *tlbe) +{ + return (tlbe->word0 >> 9) & 0x1; +} + +static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu) +{ + return vcpu->arch.mmucr & 0xff; +} + +static inline unsigned int get_mmucr_sts(const struct kvm_vcpu *vcpu) +{ + return (vcpu->arch.mmucr >> 16) & 0x1; +} + +static inline gpa_t tlb_xlate(struct tlbe *tlbe, gva_t eaddr) +{ + unsigned int pgmask = get_tlb_bytes(tlbe) - 1; + + return get_tlb_raddr(tlbe) | (eaddr & pgmask); +} + +#endif /* __KVM_POWERPC_TLB_H__ */ |