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| author |   Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2015-03-20 20:39:43 +1100 |
|---|---|---|
| committer |   Alexander Graf <agraf@suse.de> | 2015-04-21 15:21:29 +0200 |
| commit | a4bd6eb07ca72d21a7a34499ad34cfef6f527d4e (patch) | |
| tree | bba74c5424652cc64edb0911da97a670212c418d /arch/powerpc/kvm/book3s_hv_rm_mmu.c | |
| parent | KVM: PPC: Book3S HV: Remove RMA-related variables from code (diff) | |
| download | linux-dev-a4bd6eb07ca72d21a7a34499ad34cfef6f527d4e.tar.xz linux-dev-a4bd6eb07ca72d21a7a34499ad34cfef6f527d4e.zip | |
KVM: PPC: Book3S HV: Add helpers for lock/unlock hpte
This adds helper routines for locking and unlocking HPTEs, and uses
them in the rest of the code. We don't change any locking rules in
this patch.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rm_mmu.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rm_mmu.c | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c index 625407e4d3b0..f6bf0b1de6d7 100644 --- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c +++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c @@ -150,12 +150,6 @@ static pte_t lookup_linux_pte_and_update(pgd_t *pgdir, unsigned long hva, return kvmppc_read_update_linux_pte(ptep, writing, hugepage_shift); } -static inline void unlock_hpte(__be64 *hpte, unsigned long hpte_v) -{ - asm volatile(PPC_RELEASE_BARRIER "" : : : "memory"); - hpte[0] = cpu_to_be64(hpte_v); -} - long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, long pte_index, unsigned long pteh, unsigned long ptel, pgd_t *pgdir, bool realmode, unsigned long *pte_idx_ret) @@ -271,10 +265,10 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, u64 pte; while (!try_lock_hpte(hpte, HPTE_V_HVLOCK)) cpu_relax(); - pte = be64_to_cpu(*hpte); + pte = be64_to_cpu(hpte[0]); if (!(pte & (HPTE_V_VALID | HPTE_V_ABSENT))) break; - *hpte &= ~cpu_to_be64(HPTE_V_HVLOCK); + __unlock_hpte(hpte, pte); hpte += 2; } if (i == 8) @@ -290,9 +284,9 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, while (!try_lock_hpte(hpte, HPTE_V_HVLOCK)) cpu_relax(); - pte = be64_to_cpu(*hpte); + pte = be64_to_cpu(hpte[0]); if (pte & (HPTE_V_VALID | HPTE_V_ABSENT)) { - *hpte &= ~cpu_to_be64(HPTE_V_HVLOCK); + __unlock_hpte(hpte, pte); return H_PTEG_FULL; } } @@ -331,7 +325,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, /* Write the first HPTE dword, unlocking the HPTE and making it valid */ eieio(); - hpte[0] = cpu_to_be64(pteh); + __unlock_hpte(hpte, pteh); asm volatile("ptesync" : : : "memory"); *pte_idx_ret = pte_index; @@ -412,7 +406,7 @@ long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags, if ((pte & (HPTE_V_ABSENT | HPTE_V_VALID)) == 0 || ((flags & H_AVPN) && (pte & ~0x7fUL) != avpn) || ((flags & H_ANDCOND) && (pte & avpn) != 0)) { - hpte[0] &= ~cpu_to_be64(HPTE_V_HVLOCK); + __unlock_hpte(hpte, pte); return H_NOT_FOUND; } @@ -548,7 +542,7 @@ long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu) be64_to_cpu(hp[0]), be64_to_cpu(hp[1])); rcbits = rev->guest_rpte & (HPTE_R_R|HPTE_R_C); args[j] |= rcbits << (56 - 5); - hp[0] = 0; + __unlock_hpte(hp, 0); } } @@ -574,7 +568,7 @@ long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags, pte = be64_to_cpu(hpte[0]); if ((pte & (HPTE_V_ABSENT | HPTE_V_VALID)) == 0 || ((flags & H_AVPN) && (pte & ~0x7fUL) != avpn)) { - hpte[0] &= ~cpu_to_be64(HPTE_V_HVLOCK); + __unlock_hpte(hpte, pte); return H_NOT_FOUND; } @@ -755,8 +749,7 @@ long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr, unsigned long slb_v, /* Return with the HPTE still locked */ return (hash << 3) + (i >> 1); - /* Unlock and move on */ - hpte[i] = cpu_to_be64(v); + __unlock_hpte(&hpte[i], v); } if (val & HPTE_V_SECONDARY) |