From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mtagate5.de.ibm.com (mtagate5.de.ibm.com [195.212.29.154]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mtagate5.de.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 63B37DE51E for ; Tue, 19 Aug 2008 20:37:15 +1000 (EST) Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate5.de.ibm.com (8.13.8/8.13.8) with ESMTP id m7JAajfN143016 for ; Tue, 19 Aug 2008 10:36:45 GMT Received: from d12av04.megacenter.de.ibm.com (d12av04.megacenter.de.ibm.com [9.149.165.229]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v9.0) with ESMTP id m7JAajD74100222 for ; Tue, 19 Aug 2008 12:36:45 +0200 Received: from d12av04.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av04.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m7JAaiJc010555 for ; Tue, 19 Aug 2008 12:36:44 +0200 From: ehrhardt@linux.vnet.ibm.com To: linuxppc-dev@ozlabs.org, kvm-ppc@vger.kernel.org Subject: [PATCH 2/4] kvmppc: add hypercall infrastructure - guest part Date: Tue, 19 Aug 2008 12:36:42 +0200 Message-Id: <1219142204-12044-3-git-send-email-ehrhardt@linux.vnet.ibm.com> In-Reply-To: <1219142204-12044-1-git-send-email-ehrhardt@linux.vnet.ibm.com> References: <1219142204-12044-1-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 | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 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; @@ -69,6 +71,37 @@ 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; +} + +static inline long kvm_hypercall2(unsigned int nr, + unsigned long p1, unsigned long p2) +{ + register unsigned long hcall asm ("r0") = nr; + register unsigned long arg1 asm ("r3") = p1; + register unsigned long arg2 asm ("r4") = p2; + register long ret asm ("r11"); + + asm volatile(".long %1" + : "=r"(ret) + : "i"(KVM_HYPERCALL_BIN), "r"(hcall), + "r"(arg1), "r"(arg2) + : "r5", "r6", "r7", "r8", + "r9", "r10", "r12", "cc"); + return ret; +} + #endif /* __KERNEL__ */ #endif /* __POWERPC_KVM_PARA_H__ */