diff options
| 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/include | |
| parent | 31037ecad275e9ad9bc671c34f72b495cf708ca3 (diff) | |
| download | linux-a4bd6eb07ca72d21a7a34499ad34cfef6f527d4e.tar.bz2 | |
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/include')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index 2d81e202bdcc..0789a0f50969 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -85,6 +85,20 @@ static inline long try_lock_hpte(__be64 *hpte, unsigned long bits) return old == 0; } +static inline void unlock_hpte(__be64 *hpte, unsigned long hpte_v) +{ + hpte_v &= ~HPTE_V_HVLOCK; + asm volatile(PPC_RELEASE_BARRIER "" : : : "memory"); + hpte[0] = cpu_to_be64(hpte_v); +} + +/* Without barrier */ +static inline void __unlock_hpte(__be64 *hpte, unsigned long hpte_v) +{ + hpte_v &= ~HPTE_V_HVLOCK; + hpte[0] = cpu_to_be64(hpte_v); +} + static inline int __hpte_actual_psize(unsigned int lp, int psize) { int i, shift; |