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-rw-r--r--hw/apic.c43
1 files changed, 39 insertions, 4 deletions
diff --git a/hw/apic.c b/hw/apic.c
index b059185bb5..3ec4156cf2 100644
--- a/hw/apic.c
+++ b/hw/apic.c
@@ -19,6 +19,8 @@
*/
#include "hw.h"
#include "pc.h"
+#include "pci.h"
+#include "msix.h"
#include "qemu-timer.h"
#include "host-utils.h"
@@ -63,6 +65,19 @@
#define MAX_APICS 255
#define MAX_APIC_WORDS 8
+/* Intel APIC constants: from include/asm/msidef.h */
+#define MSI_DATA_VECTOR_SHIFT 0
+#define MSI_DATA_VECTOR_MASK 0x000000ff
+#define MSI_DATA_DELIVERY_MODE_SHIFT 8
+#define MSI_DATA_TRIGGER_SHIFT 15
+#define MSI_DATA_LEVEL_SHIFT 14
+#define MSI_ADDR_DEST_MODE_SHIFT 2
+#define MSI_ADDR_DEST_ID_SHIFT 12
+#define MSI_ADDR_DEST_ID_MASK 0x00ffff0
+
+#define MSI_ADDR_BASE 0xfee00000
+#define MSI_ADDR_SIZE 0x100000
+
typedef struct APICState {
CPUState *cpu_env;
uint32_t apicbase;
@@ -745,11 +760,31 @@ static uint32_t apic_mem_readl(void *opaque, target_phys_addr_t addr)
return val;
}
+static void apic_send_msi(target_phys_addr_t addr, uint32 data)
+{
+ uint8_t dest = (addr & MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
+ uint8_t vector = (data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
+ uint8_t dest_mode = (addr >> MSI_ADDR_DEST_MODE_SHIFT) & 0x1;
+ uint8_t trigger_mode = (data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
+ uint8_t delivery = (data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x7;
+ /* XXX: Ignore redirection hint. */
+ apic_deliver_irq(dest, dest_mode, delivery, vector, 0, trigger_mode);
+}
+
static void apic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
CPUState *env;
APICState *s;
- int index;
+ int index = (addr >> 4) & 0xff;
+ if (addr > 0xfff || !index) {
+ /* MSI and MMIO APIC are at the same memory location,
+ * but actually not on the global bus: MSI is on PCI bus
+ * APIC is connected directly to the CPU.
+ * Mapping them on the global bus happens to work because
+ * MSI registers are reserved in APIC MMIO and vice versa. */
+ apic_send_msi(addr, val);
+ return;
+ }
env = cpu_single_env;
if (!env)
@@ -760,7 +795,6 @@ static void apic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
printf("APIC write: %08x = %08x\n", (uint32_t)addr, val);
#endif
- index = (addr >> 4) & 0xff;
switch(index) {
case 0x02:
s->id = (val >> 24);
@@ -946,6 +980,7 @@ int apic_init(CPUState *env)
s->cpu_env = env;
apic_reset(s);
+ msix_supported = 1;
/* XXX: mapping more APICs at the same memory location */
if (apic_io_memory == 0) {
@@ -953,7 +988,8 @@ int apic_init(CPUState *env)
on the global memory bus. */
apic_io_memory = cpu_register_io_memory(apic_mem_read,
apic_mem_write, NULL);
- cpu_register_physical_memory(s->apicbase & ~0xfff, 0x1000,
+ /* XXX: what if the base changes? */
+ cpu_register_physical_memory(MSI_ADDR_BASE, MSI_ADDR_SIZE,
apic_io_memory);
}
s->timer = qemu_new_timer(vm_clock, apic_timer, s);
@@ -964,4 +1000,3 @@ int apic_init(CPUState *env)
local_apics[s->idx] = s;
return 0;
}
-