linux/arch/powerpc/kvm/44x_tlb.h
Hollis Blanchard bbf45ba57e 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>
2008-04-27 18:21:39 +03:00

92 lines
2.4 KiB
C

/*
* 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__ */