From patchwork Thu Jul 1 10:42:41 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 57502 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from bilbo.ozlabs.org (localhost [127.0.0.1]) by ozlabs.org (Postfix) with ESMTP id 89E9F1010BB for ; Thu, 1 Jul 2010 20:43:39 +1000 (EST) Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) by ozlabs.org (Postfix) with ESMTP id 0168EB6EEF for ; Thu, 1 Jul 2010 20:43:05 +1000 (EST) Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.221.2]) by mx2.suse.de (Postfix) with ESMTP id 939B687D82; Thu, 1 Jul 2010 12:43:02 +0200 (CEST) From: Alexander Graf To: kvm-ppc@vger.kernel.org Subject: [PATCH 06/27] KVM: PPC: Convert SPRG[0-4] to shared page Date: Thu, 1 Jul 2010 12:42:41 +0200 Message-Id: <1277980982-12433-7-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1277980982-12433-1-git-send-email-agraf@suse.de> References: <1277980982-12433-1-git-send-email-agraf@suse.de> Cc: linuxppc-dev , KVM list X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org When in kernel mode there are 4 additional registers available that are simple data storage. Instead of exiting to the hypervisor to read and write those, we can just share them with the guest using the page. This patch converts all users of the current field to the shared page. Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/kvm_host.h | 4 ---- arch/powerpc/include/asm/kvm_para.h | 4 ++++ arch/powerpc/kvm/book3s.c | 16 ++++++++-------- arch/powerpc/kvm/booke.c | 16 ++++++++-------- arch/powerpc/kvm/emulate.c | 24 ++++++++++++++++-------- 5 files changed, 36 insertions(+), 28 deletions(-) diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 227f770..5674300 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -216,10 +216,6 @@ struct kvm_vcpu_arch { ulong guest_owned_ext; #endif u32 mmucr; - ulong sprg0; - ulong sprg1; - ulong sprg2; - ulong sprg3; ulong sprg4; ulong sprg5; ulong sprg6; diff --git a/arch/powerpc/include/asm/kvm_para.h b/arch/powerpc/include/asm/kvm_para.h index d7fc6c2..e402999 100644 --- a/arch/powerpc/include/asm/kvm_para.h +++ b/arch/powerpc/include/asm/kvm_para.h @@ -23,6 +23,10 @@ #include struct kvm_vcpu_arch_shared { + __u64 sprg0; + __u64 sprg1; + __u64 sprg2; + __u64 sprg3; __u64 srr0; __u64 srr1; __u64 dar; diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 7cc3da6..0a56e8d 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -1062,10 +1062,10 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) regs->srr0 = vcpu->arch.shared->srr0; regs->srr1 = vcpu->arch.shared->srr1; regs->pid = vcpu->arch.pid; - regs->sprg0 = vcpu->arch.sprg0; - regs->sprg1 = vcpu->arch.sprg1; - regs->sprg2 = vcpu->arch.sprg2; - regs->sprg3 = vcpu->arch.sprg3; + regs->sprg0 = vcpu->arch.shared->sprg0; + regs->sprg1 = vcpu->arch.shared->sprg1; + regs->sprg2 = vcpu->arch.shared->sprg2; + regs->sprg3 = vcpu->arch.shared->sprg3; regs->sprg5 = vcpu->arch.sprg4; regs->sprg6 = vcpu->arch.sprg5; regs->sprg7 = vcpu->arch.sprg6; @@ -1088,10 +1088,10 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) kvmppc_set_msr(vcpu, regs->msr); vcpu->arch.shared->srr0 = regs->srr0; vcpu->arch.shared->srr1 = regs->srr1; - vcpu->arch.sprg0 = regs->sprg0; - vcpu->arch.sprg1 = regs->sprg1; - vcpu->arch.sprg2 = regs->sprg2; - vcpu->arch.sprg3 = regs->sprg3; + vcpu->arch.shared->sprg0 = regs->sprg0; + vcpu->arch.shared->sprg1 = regs->sprg1; + vcpu->arch.shared->sprg2 = regs->sprg2; + vcpu->arch.shared->sprg3 = regs->sprg3; vcpu->arch.sprg5 = regs->sprg4; vcpu->arch.sprg6 = regs->sprg5; vcpu->arch.sprg7 = regs->sprg6; diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 8b546fe..984c461 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -495,10 +495,10 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) regs->srr0 = vcpu->arch.shared->srr0; regs->srr1 = vcpu->arch.shared->srr1; regs->pid = vcpu->arch.pid; - regs->sprg0 = vcpu->arch.sprg0; - regs->sprg1 = vcpu->arch.sprg1; - regs->sprg2 = vcpu->arch.sprg2; - regs->sprg3 = vcpu->arch.sprg3; + regs->sprg0 = vcpu->arch.shared->sprg0; + regs->sprg1 = vcpu->arch.shared->sprg1; + regs->sprg2 = vcpu->arch.shared->sprg2; + regs->sprg3 = vcpu->arch.shared->sprg3; regs->sprg5 = vcpu->arch.sprg4; regs->sprg6 = vcpu->arch.sprg5; regs->sprg7 = vcpu->arch.sprg6; @@ -521,10 +521,10 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) kvmppc_set_msr(vcpu, regs->msr); vcpu->arch.shared->srr0 = regs->srr0; vcpu->arch.shared->srr1 = regs->srr1; - vcpu->arch.sprg0 = regs->sprg0; - vcpu->arch.sprg1 = regs->sprg1; - vcpu->arch.sprg2 = regs->sprg2; - vcpu->arch.sprg3 = regs->sprg3; + vcpu->arch.shared->sprg0 = regs->sprg0; + vcpu->arch.shared->sprg1 = regs->sprg1; + vcpu->arch.shared->sprg2 = regs->sprg2; + vcpu->arch.shared->sprg3 = regs->sprg3; vcpu->arch.sprg5 = regs->sprg4; vcpu->arch.sprg6 = regs->sprg5; vcpu->arch.sprg7 = regs->sprg6; diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c index ad0fa4f..454869b 100644 --- a/arch/powerpc/kvm/emulate.c +++ b/arch/powerpc/kvm/emulate.c @@ -263,13 +263,17 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu) kvmppc_set_gpr(vcpu, rt, get_tb()); break; case SPRN_SPRG0: - kvmppc_set_gpr(vcpu, rt, vcpu->arch.sprg0); break; + kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg0); + break; case SPRN_SPRG1: - kvmppc_set_gpr(vcpu, rt, vcpu->arch.sprg1); break; + kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg1); + break; case SPRN_SPRG2: - kvmppc_set_gpr(vcpu, rt, vcpu->arch.sprg2); break; + kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg2); + break; case SPRN_SPRG3: - kvmppc_set_gpr(vcpu, rt, vcpu->arch.sprg3); break; + kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg3); + break; /* Note: SPRG4-7 are user-readable, so we don't get * a trap. */ @@ -341,13 +345,17 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu) break; case SPRN_SPRG0: - vcpu->arch.sprg0 = kvmppc_get_gpr(vcpu, rs); break; + vcpu->arch.shared->sprg0 = kvmppc_get_gpr(vcpu, rs); + break; case SPRN_SPRG1: - vcpu->arch.sprg1 = kvmppc_get_gpr(vcpu, rs); break; + vcpu->arch.shared->sprg1 = kvmppc_get_gpr(vcpu, rs); + break; case SPRN_SPRG2: - vcpu->arch.sprg2 = kvmppc_get_gpr(vcpu, rs); break; + vcpu->arch.shared->sprg2 = kvmppc_get_gpr(vcpu, rs); + break; case SPRN_SPRG3: - vcpu->arch.sprg3 = kvmppc_get_gpr(vcpu, rs); break; + vcpu->arch.shared->sprg3 = kvmppc_get_gpr(vcpu, rs); + break; default: emulated = kvmppc_core_emulate_mtspr(vcpu, sprn, rs);