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authorJan Kiszka <jan.kiszka@siemens.com>2012-05-16 15:41:12 -0300
committerMarcelo Tosatti <mtosatti@redhat.com>2012-05-16 18:04:45 -0300
commitffb8d4296e01f0ead3ba81b08a34637c5bbff0da (patch)
tree12c8c989a977cd5b5cb5fcb361fc82e6a93d766a /hw/kvm
parent08a82ac01cb5409480128f8e1f144557d99b74a3 (diff)
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kvm: x86: Wire up MSI support for in-kernel irqchip
Catch writes to the MSI MMIO region in the KVM APIC and forward them to the kernel. Provide the kernel support GSI routing, this allows to enable MSI support also for in-kernel irqchip mode. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'hw/kvm')
-rw-r--r--hw/kvm/apic.c34
1 files changed, 32 insertions, 2 deletions
diff --git a/hw/kvm/apic.c b/hw/kvm/apic.c
index ffe7a52..8ba4079 100644
--- a/hw/kvm/apic.c
+++ b/hw/kvm/apic.c
@@ -10,6 +10,7 @@
* See the COPYING file in the top-level directory.
*/
#include "hw/apic_internal.h"
+#include "hw/msi.h"
#include "kvm.h"
static inline void kvm_apic_set_reg(struct kvm_lapic_state *kapic,
@@ -145,10 +146,39 @@ static void kvm_apic_external_nmi(APICCommonState *s)
run_on_cpu(s->cpu_env, do_inject_external_nmi, s);
}
+static uint64_t kvm_apic_mem_read(void *opaque, target_phys_addr_t addr,
+ unsigned size)
+{
+ return ~(uint64_t)0;
+}
+
+static void kvm_apic_mem_write(void *opaque, target_phys_addr_t addr,
+ uint64_t data, unsigned size)
+{
+ MSIMessage msg = { .address = addr, .data = data };
+ int ret;
+
+ ret = kvm_irqchip_send_msi(kvm_state, msg);
+ if (ret < 0) {
+ fprintf(stderr, "KVM: injection failed, MSI lost (%s)\n",
+ strerror(-ret));
+ }
+}
+
+static const MemoryRegionOps kvm_apic_io_ops = {
+ .read = kvm_apic_mem_read,
+ .write = kvm_apic_mem_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
static void kvm_apic_init(APICCommonState *s)
{
- memory_region_init_reservation(&s->io_memory, "kvm-apic-msi",
- MSI_SPACE_SIZE);
+ memory_region_init_io(&s->io_memory, &kvm_apic_io_ops, s, "kvm-apic-msi",
+ MSI_SPACE_SIZE);
+
+ if (kvm_has_gsi_routing()) {
+ msi_supported = true;
+ }
}
static void kvm_apic_class_init(ObjectClass *klass, void *data)