diff mbox series

[08/23] accel/tcg: Add IntervalTreeRoot to CPUTLBDesc

Message ID 20241009150855.804605-9-richard.henderson@linaro.org (mailing list archive)
State New
Headers show
Series accel/tcg: Convert victim tlb to IntervalTree | expand

Commit Message

Richard Henderson Oct. 9, 2024, 3:08 p.m. UTC 
Add the data structures for tracking softmmu pages via
a balanced interval tree.  So far, only initialize and
destroy the data structure.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/hw/core/cpu.h |  3 +++
 accel/tcg/cputlb.c    | 11 +++++++++++
 2 files changed, 14 insertions(+)

Comments

Pierrick Bouvier Oct. 9, 2024, 11:31 p.m. UTC | #1 
On 10/9/24 08:08, Richard Henderson wrote:
> Add the data structures for tracking softmmu pages via
> a balanced interval tree.  So far, only initialize and
> destroy the data structure.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   include/hw/core/cpu.h |  3 +++
>   accel/tcg/cputlb.c    | 11 +++++++++++
>   2 files changed, 14 insertions(+)
> 
> diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
> index d21a24c82f..b567abe3e2 100644
> --- a/include/hw/core/cpu.h
> +++ b/include/hw/core/cpu.h
> @@ -34,6 +34,7 @@
>   #include "qemu/rcu_queue.h"
>   #include "qemu/queue.h"
>   #include "qemu/thread.h"
> +#include "qemu/interval-tree.h"
>   #include "qom/object.h"
>   
>   typedef int (*WriteCoreDumpFunction)(const void *buf, size_t size,
> @@ -287,6 +288,8 @@ typedef struct CPUTLBDesc {
>       CPUTLBEntry vtable[CPU_VTLB_SIZE];
>       CPUTLBEntryFull vfulltlb[CPU_VTLB_SIZE];
>       CPUTLBEntryFull *fulltlb;
> +    /* All active tlb entries for this address space. */
> +    IntervalTreeRoot iroot;
>   } CPUTLBDesc;
>   
>   /*
> diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
> index 8affa25db3..435c2dc132 100644
> --- a/accel/tcg/cputlb.c
> +++ b/accel/tcg/cputlb.c
> @@ -89,6 +89,13 @@ QEMU_BUILD_BUG_ON(sizeof(vaddr) > sizeof(run_on_cpu_data));
>   QEMU_BUILD_BUG_ON(NB_MMU_MODES > 16);
>   #define ALL_MMUIDX_BITS ((1 << NB_MMU_MODES) - 1)
>   
> +/* Extra data required to manage CPUTLBEntryFull within an interval tree. */
> +typedef struct CPUTLBEntryTree {
> +    IntervalTreeNode itree;
> +    CPUTLBEntry copy;
> +    CPUTLBEntryFull full;
> +} CPUTLBEntryTree;
> +
>   static inline size_t tlb_n_entries(CPUTLBDescFast *fast)
>   {
>       return (fast->mask >> CPU_TLB_ENTRY_BITS) + 1;
> @@ -305,6 +312,7 @@ static void tlb_mmu_flush_locked(CPUTLBDesc *desc, CPUTLBDescFast *fast)
>       desc->large_page_mask = -1;
>       desc->vindex = 0;
>       memset(desc->vtable, -1, sizeof(desc->vtable));
> +    interval_tree_free_nodes(&desc->iroot, offsetof(CPUTLBEntryTree, itree));
>   }
>   
>   static void tlb_flush_one_mmuidx_locked(CPUState *cpu, int mmu_idx,
> @@ -326,6 +334,7 @@ static void tlb_mmu_init(CPUTLBDesc *desc, CPUTLBDescFast *fast, int64_t now)
>       fast->mask = (n_entries - 1) << CPU_TLB_ENTRY_BITS;
>       fast->table = g_new(CPUTLBEntry, n_entries);
>       desc->fulltlb = g_new(CPUTLBEntryFull, n_entries);
> +    memset(&desc->iroot, 0, sizeof(desc->iroot));
>       tlb_mmu_flush_locked(desc, fast);
>   }
>   
> @@ -365,6 +374,8 @@ void tlb_destroy(CPUState *cpu)
>   
>           g_free(fast->table);
>           g_free(desc->fulltlb);
> +        interval_tree_free_nodes(&cpu->neg.tlb.d[i].iroot,
> +                                 offsetof(CPUTLBEntryTree, itree));
>       }
>   }
>   

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
diff mbox series

Patch

diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index d21a24c82f..b567abe3e2 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -34,6 +34,7 @@ 
 #include "qemu/rcu_queue.h"
 #include "qemu/queue.h"
 #include "qemu/thread.h"
+#include "qemu/interval-tree.h"
 #include "qom/object.h"
 
 typedef int (*WriteCoreDumpFunction)(const void *buf, size_t size,
@@ -287,6 +288,8 @@  typedef struct CPUTLBDesc {
     CPUTLBEntry vtable[CPU_VTLB_SIZE];
     CPUTLBEntryFull vfulltlb[CPU_VTLB_SIZE];
     CPUTLBEntryFull *fulltlb;
+    /* All active tlb entries for this address space. */
+    IntervalTreeRoot iroot;
 } CPUTLBDesc;
 
 /*
diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index 8affa25db3..435c2dc132 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -89,6 +89,13 @@  QEMU_BUILD_BUG_ON(sizeof(vaddr) > sizeof(run_on_cpu_data));
 QEMU_BUILD_BUG_ON(NB_MMU_MODES > 16);
 #define ALL_MMUIDX_BITS ((1 << NB_MMU_MODES) - 1)
 
+/* Extra data required to manage CPUTLBEntryFull within an interval tree. */
+typedef struct CPUTLBEntryTree {
+    IntervalTreeNode itree;
+    CPUTLBEntry copy;
+    CPUTLBEntryFull full;
+} CPUTLBEntryTree;
+
 static inline size_t tlb_n_entries(CPUTLBDescFast *fast)
 {
     return (fast->mask >> CPU_TLB_ENTRY_BITS) + 1;
@@ -305,6 +312,7 @@  static void tlb_mmu_flush_locked(CPUTLBDesc *desc, CPUTLBDescFast *fast)
     desc->large_page_mask = -1;
     desc->vindex = 0;
     memset(desc->vtable, -1, sizeof(desc->vtable));
+    interval_tree_free_nodes(&desc->iroot, offsetof(CPUTLBEntryTree, itree));
 }
 
 static void tlb_flush_one_mmuidx_locked(CPUState *cpu, int mmu_idx,
@@ -326,6 +334,7 @@  static void tlb_mmu_init(CPUTLBDesc *desc, CPUTLBDescFast *fast, int64_t now)
     fast->mask = (n_entries - 1) << CPU_TLB_ENTRY_BITS;
     fast->table = g_new(CPUTLBEntry, n_entries);
     desc->fulltlb = g_new(CPUTLBEntryFull, n_entries);
+    memset(&desc->iroot, 0, sizeof(desc->iroot));
     tlb_mmu_flush_locked(desc, fast);
 }
 
@@ -365,6 +374,8 @@  void tlb_destroy(CPUState *cpu)
 
         g_free(fast->table);
         g_free(desc->fulltlb);
+        interval_tree_free_nodes(&cpu->neg.tlb.d[i].iroot,
+                                 offsetof(CPUTLBEntryTree, itree));
     }
 }