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| author | Paul Mackerras <paulus@samba.org> | 2011-12-12 12:31:41 +0000 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-05 14:52:37 +0200 |
| commit | da9d1d7f2875cc8c1ffbce8f3501d0b33f4e7a4d (patch) | |
| tree | a811ee19778715766e720646506311c8fc7d7bd0 /arch/powerpc/include | |
| parent | c77162dee7aff6ab5f075da9b60f649cbbeb86cc (diff) | |
| download | linux-3.10-da9d1d7f2875cc8c1ffbce8f3501d0b33f4e7a4d.tar.gz linux-3.10-da9d1d7f2875cc8c1ffbce8f3501d0b33f4e7a4d.tar.bz2 linux-3.10-da9d1d7f2875cc8c1ffbce8f3501d0b33f4e7a4d.zip | |
KVM: PPC: Allow use of small pages to back Book3S HV guests
This relaxes the requirement that the guest memory be provided as
16MB huge pages, allowing it to be provided as normal memory, i.e.
in pages of PAGE_SIZE bytes (4k or 64k). To allow this, we index
the kvm->arch.slot_phys[] arrays with a small page index, even if
huge pages are being used, and use the low-order 5 bits of each
entry to store the order of the enclosing page with respect to
normal pages, i.e. log_2(enclosing_page_size / PAGE_SIZE).
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64.h | 10 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/kvm_ppc.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 1 |
4 files changed, 13 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index 7e6f2ede44a..10920f7a2b8 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -113,4 +113,14 @@ static inline unsigned long hpte_page_size(unsigned long h, unsigned long l) return 0; /* error */ } +static inline bool slot_is_aligned(struct kvm_memory_slot *memslot, + unsigned long pagesize) +{ + unsigned long mask = (pagesize >> PAGE_SHIFT) - 1; + + if (pagesize <= PAGE_SIZE) + return 1; + return !(memslot->base_gfn & mask) && !(memslot->npages & mask); +} + #endif /* __ASM_KVM_BOOK3S_64_H__ */ diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index beb22ba71e2..9252d5e3758 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -177,14 +177,13 @@ struct revmap_entry { }; /* Low-order bits in kvm->arch.slot_phys[][] */ +#define KVMPPC_PAGE_ORDER_MASK 0x1f #define KVMPPC_GOT_PAGE 0x80 struct kvm_arch { #ifdef CONFIG_KVM_BOOK3S_64_HV unsigned long hpt_virt; struct revmap_entry *revmap; - unsigned long ram_psize; - unsigned long ram_porder; unsigned int lpid; unsigned int host_lpid; unsigned long host_lpcr; diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 1458c6740ea..fb70414db90 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -122,7 +122,7 @@ extern void kvmppc_free_hpt(struct kvm *kvm); extern long kvmppc_prepare_vrma(struct kvm *kvm, struct kvm_userspace_memory_region *mem); extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu, - struct kvm_memory_slot *memslot); + struct kvm_memory_slot *memslot, unsigned long porder); extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu); extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm, struct kvm_create_spapr_tce *args); diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 7fdc2c0b7fa..64447f6c049 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -237,6 +237,7 @@ #define LPCR_ISL (1ul << (63-2)) #define LPCR_VC_SH (63-2) #define LPCR_DPFD_SH (63-11) +#define LPCR_VRMASD (0x1ful << (63-16)) #define LPCR_VRMA_L (1ul << (63-12)) #define LPCR_VRMA_LP0 (1ul << (63-15)) #define LPCR_VRMA_LP1 (1ul << (63-16)) |