apic: Factor out base class for KVM reuse

The KVM in-kernel APIC model will reuse parts of the user space model
while providing the same frontend view to guest and most management
interfaces.

Factor out an APIC base class to encapsulate those parts that will be
shared by user space and KVM model. This class offers callback hooks for
init, base/tpr setting, and the external NMI delivery that will be
set via APICCommonInfo structure and implemented specifically in the
subclasses.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

1 files changed, 112 insertions, 0 deletions

diff --git a/hw/apic_internal.h b/hw/apic_internal.h
new file mode 100644
index 0000000..a7433fb
--- /dev/null
+++ b/hw/apic_internal.h
@@ -0,0 +1,112 @@
+/*
+ *  APIC support - internal interfaces
+ *
+ *  Copyright (c) 2004-2005 Fabrice Bellard
+ *  Copyright (c) 2011      Jan Kiszka, Siemens AG
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+#ifndef QEMU_APIC_INTERNAL_H
+#define QEMU_APIC_INTERNAL_H
+
+#include "memory.h"
+#include "sysbus.h"
+#include "qemu-timer.h"
+
+/* APIC Local Vector Table */
+#define APIC_LVT_TIMER                  0
+#define APIC_LVT_THERMAL                1
+#define APIC_LVT_PERFORM                2
+#define APIC_LVT_LINT0                  3
+#define APIC_LVT_LINT1                  4
+#define APIC_LVT_ERROR                  5
+#define APIC_LVT_NB                     6
+
+/* APIC delivery modes */
+#define APIC_DM_FIXED                   0
+#define APIC_DM_LOWPRI                  1
+#define APIC_DM_SMI                     2
+#define APIC_DM_NMI                     4
+#define APIC_DM_INIT                    5
+#define APIC_DM_SIPI                    6
+#define APIC_DM_EXTINT                  7
+
+/* APIC destination mode */
+#define APIC_DESTMODE_FLAT              0xf
+#define APIC_DESTMODE_CLUSTER           1
+
+#define APIC_TRIGGER_EDGE               0
+#define APIC_TRIGGER_LEVEL              1
+
+#define APIC_LVT_TIMER_PERIODIC         (1<<17)
+#define APIC_LVT_MASKED                 (1<<16)
+#define APIC_LVT_LEVEL_TRIGGER          (1<<15)
+#define APIC_LVT_REMOTE_IRR             (1<<14)
+#define APIC_INPUT_POLARITY             (1<<13)
+#define APIC_SEND_PENDING               (1<<12)
+
+#define ESR_ILLEGAL_ADDRESS (1 << 7)
+
+#define APIC_SV_DIRECTED_IO             (1<<12)
+#define APIC_SV_ENABLE                  (1<<8)
+
+#define MAX_APICS 255
+
+#define MSI_SPACE_SIZE                  0x100000
+
+typedef struct APICCommonState APICCommonState;
+
+struct APICCommonState {
+    SysBusDevice busdev;
+    MemoryRegion io_memory;
+    void *cpu_env;
+    uint32_t apicbase;
+    uint8_t id;
+    uint8_t arb_id;
+    uint8_t tpr;
+    uint32_t spurious_vec;
+    uint8_t log_dest;
+    uint8_t dest_mode;
+    uint32_t isr[8];  /* in service register */
+    uint32_t tmr[8];  /* trigger mode register */
+    uint32_t irr[8]; /* interrupt request register */
+    uint32_t lvt[APIC_LVT_NB];
+    uint32_t esr; /* error register */
+    uint32_t icr[2];
+
+    uint32_t divide_conf;
+    int count_shift;
+    uint32_t initial_count;
+    int64_t initial_count_load_time;
+    int64_t next_time;
+    int idx;
+    QEMUTimer *timer;
+    int sipi_vector;
+    int wait_for_sipi;
+};
+
+typedef struct APICCommonInfo APICCommonInfo;
+
+struct APICCommonInfo {
+    SysBusDeviceInfo busdev;
+    void (*init)(APICCommonState *s);
+    void (*set_base)(APICCommonState *s, uint64_t val);
+    void (*set_tpr)(APICCommonState *s, uint8_t val);
+    void (*external_nmi)(APICCommonState *s);
+};
+
+void apic_report_irq_delivered(int delivered);
+void apic_qdev_register(APICCommonInfo *info);
+
+#endif /* !QEMU_APIC_INTERNAL_H */