From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48009) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn8jP-0000yx-Oj for qemu-devel@nongnu.org; Tue, 28 Apr 2015 12:51:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Yn8jL-0000e7-9P for qemu-devel@nongnu.org; Tue, 28 Apr 2015 12:51:35 -0400 Received: from mail-wg0-f53.google.com ([74.125.82.53]:34459) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yn8jL-0000ds-24 for qemu-devel@nongnu.org; Tue, 28 Apr 2015 12:51:31 -0400 Received: by wgso17 with SMTP id o17so848427wgs.1 for ; Tue, 28 Apr 2015 09:51:30 -0700 (PDT) From: Eric Auger Date: Tue, 28 Apr 2015 17:51:08 +0100 Message-Id: <1430239873-31950-8-git-send-email-eric.auger@linaro.org> In-Reply-To: <1430239873-31950-1-git-send-email-eric.auger@linaro.org> References: <1430239873-31950-1-git-send-email-eric.auger@linaro.org> Subject: [Qemu-devel] [PATCH v13 07/12] kvm-all.c: add qemu_irq/gsi hash table and utility routines List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: eric.auger@st.com, eric.auger@linaro.org, qemu-devel@nongnu.org, alex.williamson@redhat.com, agraf@suse.de, pbonzini@redhat.com, peter.crosthwaite@xilinx.com Cc: peter.maydell@linaro.org, kim.phillips@freescale.com, b.reynal@virtualopensystems.com, vikrams@codeaurora.org, patches@linaro.org, Bharat.Bhushan@freescale.com, alex.bennee@linaro.org, kvmarm@lists.cs.columbia.edu, christoffer.dall@linaro.org VFIO platform device needs to setup irqfd but it does not know the gsi corresponding to the device qemu_irq. This series proposes to store a hash table in kvm_state using the qemu_irq as key and the gsi as a value. kvm_irqchip_set_qemuirq_gsi allows to insert such a pair. The interrupt controller is supposed to use it. kvm_irqchip_[add, remove]_irqfd_notifier allows to setup/tear down irqfd directly from the qemu_irq. Signed-off-by: Eric Auger --- v2 -> v3: - rename kvm_irqchip_[add, remove]_qemuirq_irqfd_notifier into kvm_irqchip_[add, remove]_irqfd_notifier. Possible since legacy functions were also renamed with _gsi suffix. V1 -> v2: - qemu_irq get_gsi callback replaced by hash table stored in kvm --- include/sysemu/kvm.h | 6 ++++++ kvm-all.c | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index 0f28d6f..bc3f230 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -18,6 +18,7 @@ #include "config-host.h" #include "qemu/queue.h" #include "qom/cpu.h" +#include "hw/irq.h" #ifdef CONFIG_KVM #include @@ -417,6 +418,11 @@ int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, EventNotifier *rn, int virq); int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, int virq); +int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, + EventNotifier *rn, qemu_irq irq); +int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, + qemu_irq irq); +void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi); void kvm_pc_gsi_handler(void *opaque, int n, int level); void kvm_pc_setup_irq_routing(bool pci_enabled); void kvm_init_irq_routing(KVMState *s); diff --git a/kvm-all.c b/kvm-all.c index 42bb923..6531062 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -37,6 +37,7 @@ #include "exec/address-spaces.h" #include "qemu/event_notifier.h" #include "trace.h" +#include "hw/irq.h" #include "hw/boards.h" @@ -99,6 +100,7 @@ struct KVMState * unsigned, and treating them as signed here can break things */ unsigned irq_set_ioctl; unsigned int sigmask_len; + GHashTable *gsimap; #ifdef KVM_CAP_IRQ_ROUTING struct kvm_irq_routing *irq_routes; int nr_allocated_irq_routes; @@ -1382,6 +1384,37 @@ int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, false); } +int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, + EventNotifier *rn, qemu_irq irq) +{ + gpointer key, gsi; + gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); + + if (!found) { + return -ENXIO; + } else { + return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_UINT(gsi)); + } +} + +int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, + qemu_irq irq) +{ + gpointer key, gsi; + gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi); + + if (!found) { + return -ENXIO; + } else { + return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi)); + } +} + +void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi) +{ + g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi)); +} + static int kvm_irqchip_create(MachineState *machine, KVMState *s) { int ret; @@ -1414,6 +1447,8 @@ static int kvm_irqchip_create(MachineState *machine, KVMState *s) kvm_init_irq_routing(s); + s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal); + return 0; } -- 1.8.3.2