| /* |
| * 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 SUSE Linux Products GmbH 2010 |
| * |
| * Authors: Alexander Graf <agraf@suse.de> |
| */ |
| |
| #ifndef __ASM_KVM_BOOK3S_64_H__ |
| #define __ASM_KVM_BOOK3S_64_H__ |
| |
| #ifdef CONFIG_KVM_BOOK3S_PR |
| static inline struct kvmppc_book3s_shadow_vcpu *svcpu_get(struct kvm_vcpu *vcpu) |
| { |
| preempt_disable(); |
| return &get_paca()->shadow_vcpu; |
| } |
| |
| static inline void svcpu_put(struct kvmppc_book3s_shadow_vcpu *svcpu) |
| { |
| preempt_enable(); |
| } |
| #endif |
| |
| #define SPAPR_TCE_SHIFT 12 |
| |
| #ifdef CONFIG_KVM_BOOK3S_64_HV |
| /* For now use fixed-size 16MB page table */ |
| #define HPT_ORDER 24 |
| #define HPT_NPTEG (1ul << (HPT_ORDER - 7)) /* 128B per pteg */ |
| #define HPT_NPTE (HPT_NPTEG << 3) /* 8 PTEs per PTEG */ |
| #define HPT_HASH_MASK (HPT_NPTEG - 1) |
| #endif |
| |
| /* |
| * We use a lock bit in HPTE dword 0 to synchronize updates and |
| * accesses to each HPTE, and another bit to indicate non-present |
| * HPTEs. |
| */ |
| #define HPTE_V_HVLOCK 0x40UL |
| |
| static inline long try_lock_hpte(unsigned long *hpte, unsigned long bits) |
| { |
| unsigned long tmp, old; |
| |
| asm volatile(" ldarx %0,0,%2\n" |
| " and. %1,%0,%3\n" |
| " bne 2f\n" |
| " ori %0,%0,%4\n" |
| " stdcx. %0,0,%2\n" |
| " beq+ 2f\n" |
| " li %1,%3\n" |
| "2: isync" |
| : "=&r" (tmp), "=&r" (old) |
| : "r" (hpte), "r" (bits), "i" (HPTE_V_HVLOCK) |
| : "cc", "memory"); |
| return old == 0; |
| } |
| |
| static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r, |
| unsigned long pte_index) |
| { |
| unsigned long rb, va_low; |
| |
| rb = (v & ~0x7fUL) << 16; /* AVA field */ |
| va_low = pte_index >> 3; |
| if (v & HPTE_V_SECONDARY) |
| va_low = ~va_low; |
| /* xor vsid from AVA */ |
| if (!(v & HPTE_V_1TB_SEG)) |
| va_low ^= v >> 12; |
| else |
| va_low ^= v >> 24; |
| va_low &= 0x7ff; |
| if (v & HPTE_V_LARGE) { |
| rb |= 1; /* L field */ |
| if (cpu_has_feature(CPU_FTR_ARCH_206) && |
| (r & 0xff000)) { |
| /* non-16MB large page, must be 64k */ |
| /* (masks depend on page size) */ |
| rb |= 0x1000; /* page encoding in LP field */ |
| rb |= (va_low & 0x7f) << 16; /* 7b of VA in AVA/LP field */ |
| rb |= (va_low & 0xfe); /* AVAL field (P7 doesn't seem to care) */ |
| } |
| } else { |
| /* 4kB page */ |
| rb |= (va_low & 0x7ff) << 12; /* remaining 11b of VA */ |
| } |
| rb |= (v >> 54) & 0x300; /* B field */ |
| return rb; |
| } |
| |
| #endif /* __ASM_KVM_BOOK3S_64_H__ */ |