From patchwork Thu Feb 4 12:44:34 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [04/15] kvm: add API to set ioeventfd Date: Thu, 04 Feb 2010 02:44:34 -0000 From: "Michael S. Tsirkin" X-Patchwork-Id: 44469 Message-Id: <20100204124434.GE22559@redhat.com> To: Anthony Liguori , qemu-devel@nongnu.org Cc: This adds API to set ioeventfd to kvm, as well as stubs for non-eventfd case, making it possible for users to use this API without ifdefs. Signed-off-by: Michael S. Tsirkin --- kvm-all.c | 20 ++++++++++++++++++++ kvm.h | 16 ++++++++++++++++ 2 files changed, 36 insertions(+), 0 deletions(-) diff --git a/kvm-all.c b/kvm-all.c index a312654..beaba6d 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -1113,3 +1113,23 @@ void kvm_remove_all_breakpoints(CPUState *current_env) { } #endif /* !KVM_CAP_SET_GUEST_DEBUG */ + +#ifdef KVM_IOEVENTFD +int kvm_set_ioeventfd(uint16_t addr, uint16_t data, int fd, bool assigned) +{ + struct kvm_ioeventfd kick = { + .datamatch = data, + .addr = addr, + .len = 2, + .flags = KVM_IOEVENTFD_FLAG_DATAMATCH | KVM_IOEVENTFD_FLAG_PIO, + .fd = fd, + }; + int r; + if (!assigned) + kick.flags |= KVM_IOEVENTFD_FLAG_DEASSIGN; + r = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &kick); + if (r < 0) + return r; + return 0; +} +#endif diff --git a/kvm.h b/kvm.h index 672d511..a8a86e7 100644 --- a/kvm.h +++ b/kvm.h @@ -14,10 +14,16 @@ #ifndef QEMU_KVM_H #define QEMU_KVM_H +#include +#include #include "config.h" #include "qemu-queue.h" #ifdef CONFIG_KVM +#include +#endif + +#ifdef CONFIG_KVM extern int kvm_allowed; #define kvm_enabled() (kvm_allowed) @@ -131,4 +137,14 @@ static inline void cpu_synchronize_state(CPUState *env) } } +#if defined(KVM_IOEVENTFD) && defined(CONFIG_KVM) +int kvm_set_ioeventfd(uint16_t addr, uint16_t data, int fd, bool assigned); +#else +static inline +int kvm_set_ioeventfd(uint16_t data, uint16_t addr, int fd, bool assigned) +{ + return -ENOSYS; +} +#endif + #endif