From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33187) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VZovZ-0003o9-BZ for qemu-devel@nongnu.org; Fri, 25 Oct 2013 17:28:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VZovL-0002bc-30 for qemu-devel@nongnu.org; Fri, 25 Oct 2013 17:28:17 -0400 From: Alexander Graf Date: Fri, 25 Oct 2013 23:27:34 +0200 Message-Id: <1382736474-32128-10-git-send-email-agraf@suse.de> In-Reply-To: <1382736474-32128-1-git-send-email-agraf@suse.de> References: <1382736474-32128-1-git-send-email-agraf@suse.de> Subject: [Qemu-devel] [PULL 09/29] target-ppc: Add helper for KVM_PPC_RTAS_DEFINE_TOKEN List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: QEMU Developers Cc: Alexey Kardashevskiy , Blue Swirl , "qemu-ppc@nongnu.org list:PowerPC" , Anthony Liguori , Aurelien Jarno , David Gibson From: David Gibson Recent PowerKVM allows the kernel to intercept some RTAS calls from the guest directly. This is used to implement the more efficient in-kernel XICS for example. qemu is still responsible for assigning the RTAS token numbers however, and needs to tell the kernel which RTAS function name is assigned to a given token value. This patch adds a convenience wrapper for the KVM_PPC_RTAS_DEFINE_TOKEN ioctl() which is used for this purpose. Signed-off-by: David Gibson Signed-off-by: Alexey Kardashevskiy Acked-by: David Gibson Signed-off-by: Alexander Graf --- target-ppc/kvm.c | 14 ++++++++++++++ target-ppc/kvm_ppc.h | 7 +++++++ 2 files changed, 21 insertions(+) diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 8a196c6..0b5d391 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -1789,6 +1789,20 @@ static int kvm_ppc_register_host_cpu_type(void) return 0; } +int kvmppc_define_rtas_kernel_token(uint32_t token, const char *function) +{ + struct kvm_rtas_token_args args = { + .token = token, + }; + + if (!kvm_check_extension(kvm_state, KVM_CAP_PPC_RTAS)) { + return -ENOENT; + } + + strncpy(args.name, function, sizeof(args.name)); + + return kvm_vm_ioctl(kvm_state, KVM_PPC_RTAS_DEFINE_TOKEN, &args); +} int kvmppc_get_htab_fd(bool write) { diff --git a/target-ppc/kvm_ppc.h b/target-ppc/kvm_ppc.h index 4ae7bf2..5f78e4b 100644 --- a/target-ppc/kvm_ppc.h +++ b/target-ppc/kvm_ppc.h @@ -38,6 +38,7 @@ uint64_t kvmppc_rma_size(uint64_t current_size, unsigned int hash_shift); #endif /* !CONFIG_USER_ONLY */ int kvmppc_fixup_cpu(PowerPCCPU *cpu); bool kvmppc_has_cap_epr(void); +int kvmppc_define_rtas_kernel_token(uint32_t token, const char *function); int kvmppc_get_htab_fd(bool write); int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns); int kvmppc_load_htab_chunk(QEMUFile *f, int fd, uint32_t index, @@ -164,6 +165,12 @@ static inline bool kvmppc_has_cap_epr(void) return false; } +static inline int kvmppc_define_rtas_kernel_token(uint32_t token, + const char *function) +{ + return -1; +} + static inline int kvmppc_get_htab_fd(bool write) { return -1; -- 1.8.1.4