From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-x242.google.com (mail-pf0-x242.google.com [IPv6:2607:f8b0:400e:c00::242]) (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 40WJYB4psjzF24d for ; Wed, 25 Apr 2018 21:55:26 +1000 (AEST) Received: by mail-pf0-x242.google.com with SMTP id o16so15005216pfk.9 for ; Wed, 25 Apr 2018 04:55:26 -0700 (PDT) From: wei.guo.simon@gmail.com To: kvm-ppc@vger.kernel.org Cc: Paul Mackerras , kvm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Simon Guo Subject: [PATCH 09/11] KVM: PPC: reconstruct LOAD_FP/STORE_FP instruction mmio emulation with analyse_intr() input Date: Wed, 25 Apr 2018 19:54:42 +0800 Message-Id: <1524657284-16706-10-git-send-email-wei.guo.simon@gmail.com> In-Reply-To: <1524657284-16706-1-git-send-email-wei.guo.simon@gmail.com> References: <1524657284-16706-1-git-send-email-wei.guo.simon@gmail.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Simon Guo This patch reconstructs 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. The FP regs need to be flushed so that the right FP reg vals can be read from vcpu->arch.fpr. Suggested-by: Paul Mackerras Signed-off-by: Simon Guo --- arch/powerpc/kvm/emulate_loadstore.c | 199 ++++++++--------------------------- 1 file changed, 42 insertions(+), 157 deletions(-) diff --git a/arch/powerpc/kvm/emulate_loadstore.c b/arch/powerpc/kvm/emulate_loadstore.c index aaaf872..2dbdf9a 100644 --- a/arch/powerpc/kvm/emulate_loadstore.c +++ b/arch/powerpc/kvm/emulate_loadstore.c @@ -143,6 +143,23 @@ 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 & UPDATE) { + vcpu->arch.mmio_ra = op.update_reg; + vcpu->arch.mmio_update_ra = 1; + } + + if (op.type & FPCONV) + vcpu->arch.mmio_sp64_extend = 1; + + emulated = kvmppc_handle_load(run, vcpu, + KVM_MMIO_REG_FPR|op.reg, size, 1); + break; +#endif case STORE: if (op.type & UPDATE) { vcpu->arch.mmio_ra = op.update_reg; @@ -155,6 +172,31 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) emulated = kvmppc_handle_store(run, vcpu, op.val, size, 1); break; +#ifdef CONFIG_PPC_FPU + case STORE_FP: + if (kvmppc_check_fp_disabled(vcpu)) + return EMULATE_DONE; + + /* if it is PR KVM, the FP/VEC/VSX registers need to + * be flushed so that kvmppc_handle_store() can read + * actual VMX vals from vcpu->arch. + */ + if (!is_kvmppc_hv_enabled(vcpu->kvm)) + vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, + MSR_FP); + + if (op.type & UPDATE) { + vcpu->arch.mmio_ra = op.update_reg; + vcpu->arch.mmio_update_ra = 1; + } + + if (op.type & FPCONV) + vcpu->arch.mmio_sp64_extend = 1; + + emulated = kvmppc_handle_store(run, vcpu, + VCPU_FPR(vcpu, op.reg), size, 1); + break; +#endif case CACHEOP: /* Do nothing. The guest is performing dcbi because * hardware DMA is not snooped by the dcache, but @@ -176,93 +218,6 @@ 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)) @@ -427,76 +382,6 @@ 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; -- 1.8.3.1