[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 05/19] kvm: x86: Wire up MSI support for in-kernel i
From: |
Avi Kivity |
Subject: |
[Qemu-devel] [PATCH 05/19] kvm: x86: Wire up MSI support for in-kernel irqchip |
Date: |
Mon, 21 May 2012 19:37:33 +0300 |
From: Jan Kiszka <address@hidden>
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 <address@hidden>
Signed-off-by: Marcelo Tosatti <address@hidden>
---
hw/kvm/apic.c | 34 ++++++++++++++++++++++++++++++++--
1 file 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)
--
1.7.10.1
- [Qemu-devel] [PATCH 04/19] pc: Enable MSI support at APIC level, (continued)
- [Qemu-devel] [PATCH 04/19] pc: Enable MSI support at APIC level, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 16/19] kvm: Introduce kvm_irqchip_add/remove_irqfd, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 03/19] kvm: Introduce basic MSI support for in-kernel irqchips, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 13/19] kvm: Introduce kvm_irqchip_add_msi_route, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 02/19] Introduce MSIMessage structure, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 07/19] kvm: Add support for direct MSI injections, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 18/19] msix: Add msix_nr_vectors_allocated, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 19/19] virtio/vhost: Add support for KVM in-kernel MSI injection, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 09/19] msix: Factor out msix_get_message, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 12/19] kvm: Rename kvm_irqchip_add_route to kvm_irqchip_add_irq_route, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 05/19] kvm: x86: Wire up MSI support for in-kernel irqchip,
Avi Kivity <=
- [Qemu-devel] [PATCH 15/19] kvm: Make kvm_irqchip_commit_routes an internal service, Avi Kivity, 2012/05/21
- [Qemu-devel] [PATCH 11/19] msix: Introduce vector notifiers, Avi Kivity, 2012/05/21