From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mtagate2.de.ibm.com (mtagate2.de.ibm.com [195.212.29.151]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mtagate2.de.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id E0422DDE98 for ; Wed, 23 Jul 2008 18:37:14 +1000 (EST) Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate2.de.ibm.com (8.13.8/8.13.8) with ESMTP id m6N8al0T099490 for ; Wed, 23 Jul 2008 08:36:47 GMT Received: from d12av03.megacenter.de.ibm.com (d12av03.megacenter.de.ibm.com [9.149.165.213]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v9.0) with ESMTP id m6N8al2E3633346 for ; Wed, 23 Jul 2008 10:36:47 +0200 Received: from d12av03.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av03.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m6N8alSw021864 for ; Wed, 23 Jul 2008 10:36:47 +0200 From: ehrhardt@linux.vnet.ibm.com To: kvm-ppc@vger.kernel.org, embedded-hypervisor@power.org, linuxppc-dev@ozlabs.org Subject: [PATCH 3/6] kvmppc: add hypercall infrastructure - guest part Date: Wed, 23 Jul 2008 10:36:44 +0200 Message-Id: <1216802207-32675-4-git-send-email-ehrhardt@linux.vnet.ibm.com> In-Reply-To: <1216802207-32675-1-git-send-email-ehrhardt@linux.vnet.ibm.com> References: <1216802207-32675-1-git-send-email-ehrhardt@linux.vnet.ibm.com> Cc: hollisb@us.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Christian Ehrhardt This adds the guest portion of the hypercall infrastructure, basically an illegal instruction with a defined layout. See http://kvm.qumranet.com/kvmwiki/PowerPC_Hypercall_ABI for more detail on the hypercall ABI for powerpc. Signed-off-by: Christian Ehrhardt --- [diffstat] kvm_para.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) [diff] diff --git a/include/asm-powerpc/kvm_para.h b/include/asm-powerpc/kvm_para.h --- a/include/asm-powerpc/kvm_para.h +++ b/include/asm-powerpc/kvm_para.h @@ -25,6 +25,8 @@ #ifdef __KERNEL__ #include + +#define KVM_HYPERCALL_BIN 0x03ffffff static struct kvmppc_para_features { char *dtcell; @@ -63,6 +65,20 @@ void kvm_guest_init(void); +static inline long kvm_hypercall1(unsigned int nr, unsigned long p1) +{ + register unsigned long hcall asm ("r0") = nr; + register unsigned long arg1 asm ("r3") = p1; + register long ret asm ("r11"); + + asm volatile(".long %1" + : "=r"(ret) + : "i"(KVM_HYPERCALL_BIN), "r"(hcall), "r"(arg1) + : "r4", "r5", "r6", "r7", "r8", + "r9", "r10", "r12", "cc"); + return ret; +} + #endif /* __KERNEL__ */ #endif /* __POWERPC_KVM_PARA_H__ */