diff options
Diffstat (limited to 'arch/powerpc/include/asm/kvm_host.h')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 243bc803857..97cb2d7865f 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -170,12 +170,27 @@ struct kvmppc_rma_info { /* * The reverse mapping array has one entry for each HPTE, * which stores the guest's view of the second word of the HPTE - * (including the guest physical address of the mapping). + * (including the guest physical address of the mapping), + * plus forward and backward pointers in a doubly-linked ring + * of HPTEs that map the same host page. The pointers in this + * ring are 32-bit HPTE indexes, to save space. */ struct revmap_entry { unsigned long guest_rpte; + unsigned int forw, back; }; +/* + * We use the top bit of each memslot->rmap entry as a lock bit, + * and bit 32 as a present flag. The bottom 32 bits are the + * index in the guest HPT of a HPTE that points to the page. + */ +#define KVMPPC_RMAP_LOCK_BIT 63 +#define KVMPPC_RMAP_REF_BIT 33 +#define KVMPPC_RMAP_REFERENCED (1ul << KVMPPC_RMAP_REF_BIT) +#define KVMPPC_RMAP_PRESENT 0x100000000ul +#define KVMPPC_RMAP_INDEX 0xfffffffful + /* Low-order bits in kvm->arch.slot_phys[][] */ #define KVMPPC_PAGE_ORDER_MASK 0x1f #define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */ |