Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 101 insertions, 39 deletions

diff --git a/arch/powerpc/kvm/book3s_mmu_hpte.c b/arch/powerpc/kvm/book3s_mmu_hpte.c
index 4868d4a7ebc5..79751d8dd131 100644
--- a/arch/powerpc/kvm/book3s_mmu_hpte.c
+++ b/arch/powerpc/kvm/book3s_mmu_hpte.c
@@ -21,6 +21,7 @@
 #include <linux/kvm_host.h>
 #include <linux/hash.h>
 #include <linux/slab.h>
+#include "trace.h"
 
 #include <asm/kvm_ppc.h>
 #include <asm/kvm_book3s.h>
@@ -30,14 +31,6 @@
 
 #define PTE_SIZE        12
 
-/* #define DEBUG_MMU */
-
-#ifdef DEBUG_MMU
-#define dprintk_mmu(a, ...) printk(KERN_INFO a, __VA_ARGS__)
-#else
-#define dprintk_mmu(a, ...) do { } while(0)
-#endif
-
 static struct kmem_cache *hpte_cache;
 
 static inline u64 kvmppc_mmu_hash_pte(u64 eaddr)
@@ -45,6 +38,12 @@ static inline u64 kvmppc_mmu_hash_pte(u64 eaddr)
         return hash_64(eaddr >> PTE_SIZE, HPTEG_HASH_BITS_PTE);
 }
 
+static inline u64 kvmppc_mmu_hash_pte_long(u64 eaddr)
+{
+        return hash_64((eaddr & 0x0ffff000) >> PTE_SIZE,
+                       HPTEG_HASH_BITS_PTE_LONG);
+}
+
 static inline u64 kvmppc_mmu_hash_vpte(u64 vpage)
 {
         return hash_64(vpage & 0xfffffffffULL, HPTEG_HASH_BITS_VPTE);
@@ -60,77 +59,128 @@ void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
 {
         u64 index;
 
+        trace_kvm_book3s_mmu_map(pte);
+
+        spin_lock(&vcpu->arch.mmu_lock);
+
         /* Add to ePTE list */
         index = kvmppc_mmu_hash_pte(pte->pte.eaddr);
-        hlist_add_head(&pte->list_pte, &vcpu->arch.hpte_hash_pte[index]);
+        hlist_add_head_rcu(&pte->list_pte, &vcpu->arch.hpte_hash_pte[index]);
+
+        /* Add to ePTE_long list */
+        index = kvmppc_mmu_hash_pte_long(pte->pte.eaddr);
+        hlist_add_head_rcu(&pte->list_pte_long,
+                           &vcpu->arch.hpte_hash_pte_long[index]);
 
         /* Add to vPTE list */
         index = kvmppc_mmu_hash_vpte(pte->pte.vpage);
-        hlist_add_head(&pte->list_vpte, &vcpu->arch.hpte_hash_vpte[index]);
+        hlist_add_head_rcu(&pte->list_vpte, &vcpu->arch.hpte_hash_vpte[index]);
 
         /* Add to vPTE_long list */
         index = kvmppc_mmu_hash_vpte_long(pte->pte.vpage);
-        hlist_add_head(&pte->list_vpte_long,
-                       &vcpu->arch.hpte_hash_vpte_long[index]);
+        hlist_add_head_rcu(&pte->list_vpte_long,
+                           &vcpu->arch.hpte_hash_vpte_long[index]);
+
+        spin_unlock(&vcpu->arch.mmu_lock);
+}
+
+static void free_pte_rcu(struct rcu_head *head)
+{
+        struct hpte_cache *pte = container_of(head, struct hpte_cache, rcu_head);
+        kmem_cache_free(hpte_cache, pte);
 }
 
 static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
 {
-        dprintk_mmu("KVM: Flushing SPT: 0x%lx (0x%llx) -> 0x%llx\n",
-                    pte->pte.eaddr, pte->pte.vpage, pte->host_va);
+        trace_kvm_book3s_mmu_invalidate(pte);
 
         /* Different for 32 and 64 bit */
         kvmppc_mmu_invalidate_pte(vcpu, pte);
 
+        spin_lock(&vcpu->arch.mmu_lock);
+
+        /* pte already invalidated in between? */
+        if (hlist_unhashed(&pte->list_pte)) {
+                spin_unlock(&vcpu->arch.mmu_lock);
+                return;
+        }
+
+        hlist_del_init_rcu(&pte->list_pte);
+        hlist_del_init_rcu(&pte->list_pte_long);
+        hlist_del_init_rcu(&pte->list_vpte);
+        hlist_del_init_rcu(&pte->list_vpte_long);
+
         if (pte->pte.may_write)
                 kvm_release_pfn_dirty(pte->pfn);
         else
                 kvm_release_pfn_clean(pte->pfn);
 
-        hlist_del(&pte->list_pte);
-        hlist_del(&pte->list_vpte);
-        hlist_del(&pte->list_vpte_long);
+        spin_unlock(&vcpu->arch.mmu_lock);
 
         vcpu->arch.hpte_cache_count--;
-        kmem_cache_free(hpte_cache, pte);
+        call_rcu(&pte->rcu_head, free_pte_rcu);
 }
 
 static void kvmppc_mmu_pte_flush_all(struct kvm_vcpu *vcpu)
 {
         struct hpte_cache *pte;
-        struct hlist_node *node, *tmp;
+        struct hlist_node *node;
         int i;
 
+        rcu_read_lock();
+
         for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
                 struct hlist_head *list = &vcpu->arch.hpte_hash_vpte_long[i];
 
-                hlist_for_each_entry_safe(pte, node, tmp, list, list_vpte_long)
+                hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
                         invalidate_pte(vcpu, pte);
         }
+
+        rcu_read_unlock();
 }
 
 static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea)
 {
         struct hlist_head *list;
-        struct hlist_node *node, *tmp;
+        struct hlist_node *node;
         struct hpte_cache *pte;
 
         /* Find the list of entries in the map */
         list = &vcpu->arch.hpte_hash_pte[kvmppc_mmu_hash_pte(guest_ea)];
 
+        rcu_read_lock();
+
         /* Check the list for matching entries and invalidate */
-        hlist_for_each_entry_safe(pte, node, tmp, list, list_pte)
+        hlist_for_each_entry_rcu(pte, node, list, list_pte)
                 if ((pte->pte.eaddr & ~0xfffUL) == guest_ea)
                         invalidate_pte(vcpu, pte);
+
+        rcu_read_unlock();
 }
 
-void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
+static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea)
 {
-        u64 i;
+        struct hlist_head *list;
+        struct hlist_node *node;
+        struct hpte_cache *pte;
 
-        dprintk_mmu("KVM: Flushing %d Shadow PTEs: 0x%lx & 0x%lx\n",
-                    vcpu->arch.hpte_cache_count, guest_ea, ea_mask);
+        /* Find the list of entries in the map */
+        list = &vcpu->arch.hpte_hash_pte_long[
+                        kvmppc_mmu_hash_pte_long(guest_ea)];
 
+        rcu_read_lock();
+
+        /* Check the list for matching entries and invalidate */
+        hlist_for_each_entry_rcu(pte, node, list, list_pte_long)
+                if ((pte->pte.eaddr & 0x0ffff000UL) == guest_ea)
+                        invalidate_pte(vcpu, pte);
+
+        rcu_read_unlock();
+}
+
+void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
+{
+        trace_kvm_book3s_mmu_flush("", vcpu, guest_ea, ea_mask);
         guest_ea &= ea_mask;
 
         switch (ea_mask) {
@@ -138,9 +188,7 @@ void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
                 kvmppc_mmu_pte_flush_page(vcpu, guest_ea);
                 break;
         case 0x0ffff000:
-                /* 32-bit flush w/o segment, go through all possible segments */
-                for (i = 0; i < 0x100000000ULL; i += 0x10000000ULL)
-                        kvmppc_mmu_pte_flush(vcpu, guest_ea | i, ~0xfffUL);
+                kvmppc_mmu_pte_flush_long(vcpu, guest_ea);
                 break;
         case 0:
                 /* Doing a complete flush -> start from scratch */
@@ -156,39 +204,46 @@ void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
 static void kvmppc_mmu_pte_vflush_short(struct kvm_vcpu *vcpu, u64 guest_vp)
 {
         struct hlist_head *list;
-        struct hlist_node *node, *tmp;
+        struct hlist_node *node;
         struct hpte_cache *pte;
         u64 vp_mask = 0xfffffffffULL;
 
         list = &vcpu->arch.hpte_hash_vpte[kvmppc_mmu_hash_vpte(guest_vp)];
 
+        rcu_read_lock();
+
         /* Check the list for matching entries and invalidate */
-        hlist_for_each_entry_safe(pte, node, tmp, list, list_vpte)
+        hlist_for_each_entry_rcu(pte, node, list, list_vpte)
                 if ((pte->pte.vpage & vp_mask) == guest_vp)
                         invalidate_pte(vcpu, pte);
+
+        rcu_read_unlock();
 }
 
 /* Flush with mask 0xffffff000 */
 static void kvmppc_mmu_pte_vflush_long(struct kvm_vcpu *vcpu, u64 guest_vp)
 {
         struct hlist_head *list;
-        struct hlist_node *node, *tmp;
+        struct hlist_node *node;
         struct hpte_cache *pte;
         u64 vp_mask = 0xffffff000ULL;
 
         list = &vcpu->arch.hpte_hash_vpte_long[
                 kvmppc_mmu_hash_vpte_long(guest_vp)];
 
+        rcu_read_lock();
+
         /* Check the list for matching entries and invalidate */
-        hlist_for_each_entry_safe(pte, node, tmp, list, list_vpte_long)
+        hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
                 if ((pte->pte.vpage & vp_mask) == guest_vp)
                         invalidate_pte(vcpu, pte);
+
+        rcu_read_unlock();
 }
 
 void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
 {
-        dprintk_mmu("KVM: Flushing %d Shadow vPTEs: 0x%llx & 0x%llx\n",
-                    vcpu->arch.hpte_cache_count, guest_vp, vp_mask);
+        trace_kvm_book3s_mmu_flush("v", vcpu, guest_vp, vp_mask);
         guest_vp &= vp_mask;
 
         switch(vp_mask) {
@@ -206,21 +261,24 @@ void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
 
 void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
 {
-        struct hlist_node *node, *tmp;
+        struct hlist_node *node;
         struct hpte_cache *pte;
         int i;
 
-        dprintk_mmu("KVM: Flushing %d Shadow pPTEs: 0x%lx - 0x%lx\n",
-                    vcpu->arch.hpte_cache_count, pa_start, pa_end);
+        trace_kvm_book3s_mmu_flush("p", vcpu, pa_start, pa_end);
+
+        rcu_read_lock();
 
         for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
                 struct hlist_head *list = &vcpu->arch.hpte_hash_vpte_long[i];
 
-                hlist_for_each_entry_safe(pte, node, tmp, list, list_vpte_long)
+                hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
                         if ((pte->pte.raddr >= pa_start) &&
                             (pte->pte.raddr < pa_end))
                                 invalidate_pte(vcpu, pte);
         }
+
+        rcu_read_unlock();
 }
 
 struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu)
@@ -254,11 +312,15 @@ int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu)
         /* init hpte lookup hashes */
         kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_pte,
                                   ARRAY_SIZE(vcpu->arch.hpte_hash_pte));
+        kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_pte_long,
+                                  ARRAY_SIZE(vcpu->arch.hpte_hash_pte_long));
         kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_vpte,
                                   ARRAY_SIZE(vcpu->arch.hpte_hash_vpte));
         kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_vpte_long,
                                   ARRAY_SIZE(vcpu->arch.hpte_hash_vpte_long));
 
+        spin_lock_init(&vcpu->arch.mmu_lock);
+
         return 0;
 }