KVM: PPC: e500: MMU API
This implements a shared-memory API for giving host userspace access to
the guest's TLB.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/powerpc/include/asm/kvm.h b/arch/powerpc/include/asm/kvm.h
index 7d9d4de..663c57f 100644
--- a/arch/powerpc/include/asm/kvm.h
+++ b/arch/powerpc/include/asm/kvm.h
@@ -296,4 +296,39 @@
__u64 rma_size;
};
+struct kvm_book3e_206_tlb_entry {
+ __u32 mas8;
+ __u32 mas1;
+ __u64 mas2;
+ __u64 mas7_3;
+};
+
+struct kvm_book3e_206_tlb_params {
+ /*
+ * For mmu types KVM_MMU_FSL_BOOKE_NOHV and KVM_MMU_FSL_BOOKE_HV:
+ *
+ * - The number of ways of TLB0 must be a power of two between 2 and
+ * 16.
+ * - TLB1 must be fully associative.
+ * - The size of TLB0 must be a multiple of the number of ways, and
+ * the number of sets must be a power of two.
+ * - The size of TLB1 may not exceed 64 entries.
+ * - TLB0 supports 4 KiB pages.
+ * - The page sizes supported by TLB1 are as indicated by
+ * TLB1CFG (if MMUCFG[MAVN] = 0) or TLB1PS (if MMUCFG[MAVN] = 1)
+ * as returned by KVM_GET_SREGS.
+ * - TLB2 and TLB3 are reserved, and their entries in tlb_sizes[]
+ * and tlb_ways[] must be zero.
+ *
+ * tlb_ways[n] = tlb_sizes[n] means the array is fully associative.
+ *
+ * KVM will adjust TLBnCFG based on the sizes configured here,
+ * though arrays greater than 2048 entries will have TLBnCFG[NENTRY]
+ * set to zero.
+ */
+ __u32 tlb_sizes[4];
+ __u32 tlb_ways[4];
+ __u32 reserved[8];
+};
+
#endif /* __LINUX_KVM_POWERPC_H */
diff --git a/arch/powerpc/include/asm/kvm_e500.h b/arch/powerpc/include/asm/kvm_e500.h
index a5197d8..bc17441 100644
--- a/arch/powerpc/include/asm/kvm_e500.h
+++ b/arch/powerpc/include/asm/kvm_e500.h
@@ -22,13 +22,6 @@
#define E500_PID_NUM 3
#define E500_TLB_NUM 2
-struct tlbe{
- u32 mas1;
- u32 mas2;
- u32 mas3;
- u32 mas7;
-};
-
#define E500_TLB_VALID 1
#define E500_TLB_DIRTY 2
@@ -48,13 +41,17 @@
};
struct kvmppc_vcpu_e500 {
- /* Unmodified copy of the guest's TLB. */
- struct tlbe *gtlb_arch[E500_TLB_NUM];
+ /* Unmodified copy of the guest's TLB -- shared with host userspace. */
+ struct kvm_book3e_206_tlb_entry *gtlb_arch;
+
+ /* Starting entry number in gtlb_arch[] */
+ int gtlb_offset[E500_TLB_NUM];
/* KVM internal information associated with each guest TLB entry */
struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
- unsigned int gtlb_size[E500_TLB_NUM];
+ struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
+
unsigned int gtlb_nv[E500_TLB_NUM];
/*
@@ -68,7 +65,6 @@
* and back, and our host TLB entries got evicted).
*/
struct tlbe_ref *tlb_refs[E500_TLB_NUM];
-
unsigned int host_tlb1_nv;
u32 host_pid[E500_PID_NUM];
@@ -78,11 +74,10 @@
u32 mas0;
u32 mas1;
u32 mas2;
- u32 mas3;
+ u64 mas7_3;
u32 mas4;
u32 mas5;
u32 mas6;
- u32 mas7;
/* vcpu id table */
struct vcpu_id_table *idt;
@@ -95,6 +90,9 @@
u32 tlb1cfg;
u64 mcar;
+ struct page **shared_tlb_pages;
+ int num_shared_tlb_pages;
+
struct kvm_vcpu vcpu;
};
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index 46efd1a..a284f20 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -193,4 +193,9 @@
{}
#endif
+int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
+ struct kvm_config_tlb *cfg);
+int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
+ struct kvm_dirty_tlb *cfg);
+
#endif /* __POWERPC_KVM_PPC_H__ */