From patchwork Mon May 21 05:24:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Guo X-Patchwork-Id: 917415 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40q7wf6p6mz9s0y for ; Mon, 21 May 2018 16:22:10 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="bjGqbm+k"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 40q7wf4dw9zF0wy for ; Mon, 21 May 2018 16:22:10 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="bjGqbm+k"; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:400e:c00::244; helo=mail-pf0-x244.google.com; envelope-from=wei.guo.simon@gmail.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="bjGqbm+k"; dkim-atps=neutral Received: from mail-pf0-x244.google.com (mail-pf0-x244.google.com [IPv6:2607:f8b0:400e:c00::244]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 40q7RR1sKszF0wq for ; Mon, 21 May 2018 16:00:19 +1000 (AEST) Received: by mail-pf0-x244.google.com with SMTP id e9-v6so6549577pfi.4 for ; Sun, 20 May 2018 23:00:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=qnEYrJrIIF0/ea/MZrUvASeVYmf5v219xi4UTRVx+Hs=; b=bjGqbm+kvtLG+Uwhxf7sU10HoAIlctGHpDnQch05WRU7OejtEzDU8ffUGM4B3Dk9nr NgIDLLn9HSZy2P//gsjVI4bXnSnQ1QIXfRXfKhydvrMCJAi15mFX/tGloAtzO+46G00o Jgjzha08Zhtg0u3SqPwISL2Kj39Q672QCrOY8P60E35sZuwqEZXnz83p4xYR6A3JIC5u Yu8FulledRbnOrDIabM9fEI1fd+l6IHAnNlqu5onBKbYkuTab7QHRVCdDDhPUAMNehNT mFGCBPT2mk16WdWwRlpWyqoNwqAvRkLlUtj+Dvuv4uMOD+hLf6eCF96MAf2EAFwsJAKA PO9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=qnEYrJrIIF0/ea/MZrUvASeVYmf5v219xi4UTRVx+Hs=; b=fxXKAohMRfh3Rrn69US9qcyAuoxYDsmqM9Jk+EE17ddaHWgUAYT5bns/LiOHLXQcgN xr1XNLedQaSHnv4MREoKUnR1yApLBBXrzhZ84rNcCkBqBtFA5dA3rl0I5gtrgmkbrvj2 IlzwXlEw8BUBZhoSuXiN2G7eO0BpCSIcuUq+ospJ4Lo6EjrzgJLQ+USGMIyovNunt9hu RA2nmjnHsOiD/CiZNaA5TbmDf/dWDVN3O7wGTG6hYXpvs1FLWv/C8L+z6SX0Wr/30/1P 9hsDj6EdbDWqImtVq5R17kG0CCWEypU+F1eucsNBCYRxn1iUw8nsBUfvsMkN4+msNjo2 vehQ== X-Gm-Message-State: ALKqPwfkIQTr2clzhxbDB/phpUhqvZ8zFzk60FqZ5C5oVsXKVw/GbU1X kogKARupA2YRIJ6hcNGnzF4= X-Google-Smtp-Source: AB8JxZqL2J4gGIqSB4yct23TWp+ryc0MTvs0qqafgrBipypgivRYV1gipey8pi7FfkYuuF+L/BKt5w== X-Received: by 2002:a65:6205:: with SMTP id d5-v6mr14764889pgv.416.1526882417246; Sun, 20 May 2018 23:00:17 -0700 (PDT) Received: from simonLocalRHEL7.cn.ibm.com ([112.73.0.89]) by smtp.gmail.com with ESMTPSA id g76-v6sm24424203pfj.102.2018.05.20.23.00.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 20 May 2018 23:00:16 -0700 (PDT) From: wei.guo.simon@gmail.com To: kvm-ppc@vger.kernel.org Subject: [PATCH v3 4/7] KVM: PPC: reimplement LOAD_FP/STORE_FP instruction mmio emulation with analyse_intr() input Date: Mon, 21 May 2018 13:24:23 +0800 Message-Id: <1526880266-11291-5-git-send-email-wei.guo.simon@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1526880266-11291-1-git-send-email-wei.guo.simon@gmail.com> References: <1526880266-11291-1-git-send-email-wei.guo.simon@gmail.com> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Simon Guo , linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Simon Guo This patch reimplements LOAD_FP/STORE_FP instruction MMIO emulation with analyse_intr() input. It utilizes the FPCONV/UPDATE properties exported by analyse_instr() and invokes kvmppc_handle_load(s)/kvmppc_handle_store() accordingly. For FP store MMIO emulation, the FP regs need to be flushed firstly so that the right FP reg vals can be read from vcpu->arch.fpr, which will be stored into MMIO data. Suggested-by: Paul Mackerras Signed-off-by: Simon Guo --- arch/powerpc/kvm/emulate_loadstore.c | 201 ++++++++--------------------------- 1 file changed, 44 insertions(+), 157 deletions(-) diff --git a/arch/powerpc/kvm/emulate_loadstore.c b/arch/powerpc/kvm/emulate_loadstore.c index af7c71a..5d38f95 100644 --- a/arch/powerpc/kvm/emulate_loadstore.c +++ b/arch/powerpc/kvm/emulate_loadstore.c @@ -138,6 +138,26 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) break; } +#ifdef CONFIG_PPC_FPU + case LOAD_FP: + if (kvmppc_check_fp_disabled(vcpu)) + return EMULATE_DONE; + + if (op.type & FPCONV) + vcpu->arch.mmio_sp64_extend = 1; + + if (op.type & SIGNEXT) + emulated = kvmppc_handle_loads(run, vcpu, + KVM_MMIO_REG_FPR|op.reg, size, 1); + else + emulated = kvmppc_handle_load(run, vcpu, + KVM_MMIO_REG_FPR|op.reg, size, 1); + + if ((op.type & UPDATE) && (emulated != EMULATE_FAIL)) + kvmppc_set_gpr(vcpu, op.update_reg, op.ea); + + break; +#endif case STORE: /* if need byte reverse, op.val has been reversed by * analyse_instr(). @@ -149,6 +169,30 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) kvmppc_set_gpr(vcpu, op.update_reg, op.ea); break; +#ifdef CONFIG_PPC_FPU + case STORE_FP: + if (kvmppc_check_fp_disabled(vcpu)) + return EMULATE_DONE; + + /* The FP registers need to be flushed so that + * kvmppc_handle_store() can read actual FP vals + * from vcpu->arch. + */ + if (vcpu->kvm->arch.kvm_ops->giveup_ext) + vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, + MSR_FP); + + if (op.type & FPCONV) + vcpu->arch.mmio_sp64_extend = 1; + + emulated = kvmppc_handle_store(run, vcpu, + VCPU_FPR(vcpu, op.reg), size, 1); + + if ((op.type & UPDATE) && (emulated != EMULATE_FAIL)) + kvmppc_set_gpr(vcpu, op.update_reg, op.ea); + + break; +#endif case CACHEOP: /* Do nothing. The guest is performing dcbi because * hardware DMA is not snooped by the dcache, but @@ -170,93 +214,6 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) switch (get_op(inst)) { case 31: switch (get_xop(inst)) { -#ifdef CONFIG_PPC_FPU - case OP_31_XOP_LFSX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - vcpu->arch.mmio_sp64_extend = 1; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 4, 1); - break; - - case OP_31_XOP_LFSUX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - vcpu->arch.mmio_sp64_extend = 1; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_31_XOP_LFDX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 8, 1); - break; - - case OP_31_XOP_LFDUX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 8, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_31_XOP_LFIWAX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_loads(run, vcpu, - KVM_MMIO_REG_FPR|rt, 4, 1); - break; - - case OP_31_XOP_LFIWZX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 4, 1); - break; - - case OP_31_XOP_STFSX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - vcpu->arch.mmio_sp64_extend = 1; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), 4, 1); - break; - - case OP_31_XOP_STFSUX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - vcpu->arch.mmio_sp64_extend = 1; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_31_XOP_STFDX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), 8, 1); - break; - - case OP_31_XOP_STFDUX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), 8, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_31_XOP_STFIWX: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), 4, 1); - break; -#endif - #ifdef CONFIG_VSX case OP_31_XOP_LXSDX: if (kvmppc_check_vsx_disabled(vcpu)) @@ -421,76 +378,6 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) } break; -#ifdef CONFIG_PPC_FPU - case OP_STFS: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - vcpu->arch.mmio_sp64_extend = 1; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), - 4, 1); - break; - - case OP_STFSU: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - vcpu->arch.mmio_sp64_extend = 1; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), - 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_STFD: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), - 8, 1); - break; - - case OP_STFDU: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_store(run, vcpu, - VCPU_FPR(vcpu, rs), - 8, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_LFS: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - vcpu->arch.mmio_sp64_extend = 1; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 4, 1); - break; - - case OP_LFSU: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - vcpu->arch.mmio_sp64_extend = 1; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 4, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; - - case OP_LFD: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 8, 1); - break; - - case OP_LFDU: - if (kvmppc_check_fp_disabled(vcpu)) - return EMULATE_DONE; - emulated = kvmppc_handle_load(run, vcpu, - KVM_MMIO_REG_FPR|rt, 8, 1); - kvmppc_set_gpr(vcpu, ra, vcpu->arch.vaddr_accessed); - break; -#endif - default: emulated = EMULATE_FAIL; break;