[RFC][PATCH 07/45] msi: Generalize msix_supported to msi_supported

[Jan Kiszka <jan.kiszka@xxxxxxxxxxx>]

Rename msix_supported to msi_supported and control MSI and MSI-X
activation this way. That was likely to original intention for this
flag, but MSI support came after MSI-X.

Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
 hw/msi.c  |    8 ++++++++
 hw/msi.h  |    2 ++
 hw/msix.c |    8 +++-----
 hw/msix.h |    2 --
 hw/pc.c   |    4 ++--
 5 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/hw/msi.c b/hw/msi.c
index c924e38..2b7b6e3 100644
--- a/hw/msi.c
+++ b/hw/msi.c
@@ -37,6 +37,9 @@
 
 #define PCI_MSI_VECTORS_MAX     32
 
+/* Flag for interrupt controller to declare MSI/MSI-X support */
+bool msi_supported;
+
 /* If we get rid of cap allocator, we won't need this. */
 static inline uint8_t msi_cap_sizeof(uint16_t flags)
 {
@@ -205,6 +208,11 @@ int msi_init(struct PCIDevice *dev, uint8_t offset,
     uint16_t flags;
     uint8_t cap_size;
     int config_offset;
+
+    if (!msi_supported) {
+        return -ENOTSUP;
+    }
+
     MSI_DEV_PRINTF(dev,
                    "init offset: 0x%"PRIx8" vector: %"PRId8
                    " 64bit %d mask %d\n",
diff --git a/hw/msi.h b/hw/msi.h
index 6ff0607..e5e821f 100644
--- a/hw/msi.h
+++ b/hw/msi.h
@@ -24,6 +24,8 @@
 #include "qemu-common.h"
 #include "pci.h"
 
+extern bool msi_supported;
+
 bool msi_enabled(const PCIDevice *dev);
 int msi_init(struct PCIDevice *dev, uint8_t offset,
              unsigned int nr_vectors, bool msi64bit, bool msi_per_vector_mask);
diff --git a/hw/msix.c b/hw/msix.c
index 33cb716..04e08e5 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -12,6 +12,7 @@
  */
 
 #include "hw.h"
+#include "msi.h"
 #include "msix.h"
 #include "pci.h"
 #include "range.h"
@@ -32,10 +33,6 @@
 #define MSIX_PAGE_PENDING (MSIX_PAGE_SIZE / 2)
 #define MSIX_MAX_ENTRIES 32
 
-
-/* Flag for interrupt controller to declare MSI-X support */
-int msix_supported;
-
 /* KVM specific MSIX helpers */
 static void kvm_msix_free(PCIDevice *dev)
 {
@@ -327,8 +324,9 @@ int msix_init(struct PCIDevice *dev, unsigned short nentries,
               unsigned bar_nr, unsigned bar_size)
 {
     int ret;
+
     /* Nothing to do if MSI is not supported by interrupt controller */
-    if (!msix_supported ||
+    if (!msi_supported ||
         (kvm_enabled() && kvm_irqchip_in_kernel() && !kvm_has_gsi_routing())) {
         return -ENOTSUP;
     }
diff --git a/hw/msix.h b/hw/msix.h
index 189bb3f..a8661e1 100644
--- a/hw/msix.h
+++ b/hw/msix.h
@@ -29,8 +29,6 @@ void msix_notify(PCIDevice *dev, unsigned vector);
 
 void msix_reset(PCIDevice *dev);
 
-extern int msix_supported;
-
 int msix_set_mask_notifier(PCIDevice *dev, msix_mask_notifier_func);
 int msix_unset_mask_notifier(PCIDevice *dev);
 #endif
diff --git a/hw/pc.c b/hw/pc.c
index 70e0d08..768a20c 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -36,7 +36,7 @@
 #include "elf.h"
 #include "multiboot.h"
 #include "mc146818rtc.h"
-#include "msix.h"
+#include "msi.h"
 #include "sysbus.h"
 #include "sysemu.h"
 #include "kvm.h"
@@ -892,7 +892,7 @@ static DeviceState *apic_init(void *env, uint8_t apic_id)
         apic_mapped = 1;
     }
 
-    msix_supported = 1;
+    msi_supported = true;
 
     return dev;
 }
-- 
1.7.3.4

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