From patchwork Tue Apr 20 00:49:54 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 93588 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o3K0oF1g011562 for ; Tue, 20 Apr 2010 00:50:15 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752851Ab0DTAuL (ORCPT ); Mon, 19 Apr 2010 20:50:11 -0400 Received: from cantor.suse.de ([195.135.220.2]:56034 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752729Ab0DTAt6 (ORCPT ); Mon, 19 Apr 2010 20:49:58 -0400 Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.221.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.suse.de (Postfix) with ESMTP id 338C76CB00; Tue, 20 Apr 2010 02:49:57 +0200 (CEST) From: Alexander Graf To: kvm-ppc@vger.kernel.org Cc: kvm@vger.kernel.org Subject: [PATCH 9/9] KVM: PPC: Enable native paired singles Date: Tue, 20 Apr 2010 02:49:54 +0200 Message-Id: <1271724594-6223-10-git-send-email-agraf@suse.de> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1271724594-6223-1-git-send-email-agraf@suse.de> References: <1271724594-6223-1-git-send-email-agraf@suse.de> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Tue, 20 Apr 2010 00:50:15 +0000 (UTC) diff --git a/arch/powerpc/include/asm/kvm_asm.h b/arch/powerpc/include/asm/kvm_asm.h index 7238c04..c5ea4cd 100644 --- a/arch/powerpc/include/asm/kvm_asm.h +++ b/arch/powerpc/include/asm/kvm_asm.h @@ -89,6 +89,7 @@ #define BOOK3S_HFLAG_DCBZ32 0x1 #define BOOK3S_HFLAG_SLB 0x2 #define BOOK3S_HFLAG_PAIRED_SINGLE 0x4 +#define BOOK3S_HFLAG_NATIVE_PS 0x8 #define RESUME_FLAG_NV (1<<0) /* Reload guest nonvolatile state? */ #define RESUME_FLAG_HOST (1<<1) /* Resume host? */ diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 91dc42d..cfc3051 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -344,6 +344,8 @@ void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu) void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) { + u32 host_pvr; + vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB; vcpu->arch.pvr = pvr; #ifdef CONFIG_PPC_BOOK3S_64 @@ -375,6 +377,23 @@ void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) /* 32 bit Book3S always has 32 byte dcbz */ vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32; #endif + + /* On some CPUs we can execute paired single operations natively */ + asm ( "mfpvr %0" : "=r"(host_pvr)); + switch (host_pvr) { + case 0x00080200: /* lonestar 2.0 */ + case 0x00088202: /* lonestar 2.2 */ + case 0x70000100: /* gekko 1.0 */ + case 0x00080100: /* gekko 2.0 */ + case 0x00083203: /* gekko 2.3a */ + case 0x00083213: /* gekko 2.3b */ + case 0x00083204: /* gekko 2.4 */ + case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */ + case 0x00087200: /* broadway */ + vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS; + /* Enable HID2.PSE - in case we need it later */ + mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29)); + } } /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c index 3f7afb5..c85f906 100644 --- a/arch/powerpc/kvm/book3s_emulate.c +++ b/arch/powerpc/kvm/book3s_emulate.c @@ -365,7 +365,10 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs) case 0x00083213: /* gekko 2.3b */ case 0x00083204: /* gekko 2.4 */ case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */ - if (spr_val & (1 << 29)) { /* HID2.PSE */ + case 0x00087200: /* broadway */ + if (vcpu->arch.hflags & BOOK3S_HFLAG_NATIVE_PS) { + /* Native paired singles */ + } else if (spr_val & (1 << 29)) { /* HID2.PSE */ vcpu->arch.hflags |= BOOK3S_HFLAG_PAIRED_SINGLE; kvmppc_giveup_ext(vcpu, MSR_FP); } else {