[PATCH v1 2/9] Add state for RDT device.

[Hendrik Wuethrich]

From: ‪Hendrik Wüthrich <whendrik@google.com>

Add structures and variables needed to emulate Intel RDT, including
module-internal sturctures and state in ArchCPU. No functionality yet.

Signed-off-by: Hendrik Wüthrich <whendrik@google.com>
---
 hw/i386/rdt.c     | 33 +++++++++++++++++++++++++++++++++
 target/i386/cpu.h |  5 +++++
 2 files changed, 38 insertions(+)

diff --git a/hw/i386/rdt.c b/hw/i386/rdt.c
index 0a5e95606b..cf246ab835 100644
--- a/hw/i386/rdt.c
+++ b/hw/i386/rdt.c
@@ -7,12 +7,44 @@
 #include "target/i386/cpu.h"
 #include "hw/isa/isa.h"
 
+/* Max counts for allocation masks or CBMs. In other words, the size of 
respective MSRs*/
+#define MAX_L3_MASK_COUNT      128
+#define MAX_L2_MASK_COUNT      48
+#define MAX_MBA_THRTL_COUNT    31
+
 #define TYPE_RDT "rdt"
+#define RDT_NUM_RMID_PROP "rmids"
 
 OBJECT_DECLARE_TYPE(RDTState, RDTStateClass, RDT);
 
+struct RDTMonitor {
+    uint64_t count_local;
+    uint64_t count_remote;
+    uint64_t count_l3;
+};
+
+struct RDTAllocation {
+    uint32_t active_cos;
+};
+
+struct RDTStateInstance {
+    uint32_t active_rmid;
+    GArray *monitors;
+
+    RDTState *rdtstate;
+};
+
 struct RDTState {
     ISADevice parent;
+
+    uint32_t rmids;
+
+    GArray *rdtInstances;
+    GArray *allocations;
+
+    uint32_t msr_L3_ia32_mask_n[MAX_L3_MASK_COUNT];
+    uint32_t msr_L2_ia32_mask_n[MAX_L2_MASK_COUNT];
+    uint32_t ia32_L2_qos_ext_bw_thrtl_n[MAX_MBA_THRTL_COUNT];
 };
 
 struct RDTStateClass { };
@@ -20,6 +52,7 @@ struct RDTStateClass { };
 OBJECT_DEFINE_TYPE(RDTState, rdt, RDT, ISA_DEVICE);
 
 static Property rdt_properties[] = {
+    DEFINE_PROP_UINT32(RDT_NUM_RMID_PROP, RDTState, rmids, 256),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 1e121acef5..bd0bbb75f2 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -1987,6 +1987,8 @@ typedef struct CPUArchState {
 
 struct kvm_msrs;
 
+struct RDTState;
+struct rdtStateInstance;
 /**
  * X86CPU:
  * @env: #CPUX86State
@@ -2143,6 +2145,9 @@ struct ArchCPU {
     struct MemoryRegion *cpu_as_root, *cpu_as_mem, *smram;
     Notifier machine_done;
 
+    /* Help the RDT MSRs find the RDT device */
+    struct RDTStateInstance *rdt;
+
     struct kvm_msrs *kvm_msr_buf;
 
     int32_t node_id; /* NUMA node this CPU belongs to */
-- 
2.45.2.1089.g2a221341d9-goog