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[2620:137:e000::1:20]) by mx.google.com with ESMTP id n13-20020a170903110d00b001a96b56099fsi44953plh.404.2023.05.21.20.25.52; Sun, 21 May 2023 20:26:04 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231874AbjEVDOF (ORCPT + 99 others); Sun, 21 May 2023 23:14:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231560AbjEVDM2 (ORCPT ); Sun, 21 May 2023 23:12:28 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 3DD15EC; Sun, 21 May 2023 20:12:26 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8CxNumZ3Wpkq8sKAA--.18849S3; Mon, 22 May 2023 11:12:25 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxMMiR3WpkJIFuAA--.54000S23; Mon, 22 May 2023 11:12:24 +0800 (CST) From: Tianrui Zhao To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , Huacai Chen , WANG Xuerui , Greg Kroah-Hartman , loongarch@lists.linux.dev, Jens Axboe , Mark Brown , Alex Deucher , Oliver Upton , maobibo@loongson.cn, Xi Ruoyao , zhaotianrui@loongson.cn Subject: [PATCH v11 21/31] LoongArch: KVM: Implement handle iocsr exception Date: Mon, 22 May 2023 11:12:07 +0800 Message-Id: <20230522031217.956464-22-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230522031217.956464-1-zhaotianrui@loongson.cn> References: <20230522031217.956464-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8DxMMiR3WpkJIFuAA--.54000S23 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxWFWrGw17Kry5ZFy7ArWxXrb_yoWrJF1Upa yUZryktrW8Wwn3twsxJrs7Xr1aqF48Gry7JFZxJw4furW2ya45Jr4vkrnFvF98K393Gr4I 9w1fJryxuF1qy3JanT9S1TB71UUUUjDqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bxxFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aV CY1x0267AKxVW8Jr0_Cr1UM2kKe7AKxVWUAVWUtwAS0I0E0xvYzxvE52x082IY62kv0487 Mc804VCY07AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VCjz48v1s IEY20_WwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxVAaw2AFwI0_ JF0_Jw1l42xK82IYc2Ij64vIr41l42xK82IY6x8ErcxFaVAv8VWrMxC20s026xCaFVCjc4 AY6r1j6r4UMxCIbckI1I0E14v26r126r1DMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCj r7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6x IIjxv20xvE14v26w1j6s0DMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UMIIF0xvE 42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8Jr0_Cr1UMIIF0xvEx4A2js IEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvj4RKpBTUUUUU X-Spam-Status: No, score=1.4 required=5.0 tests=BAYES_00,RCVD_IN_SBL_CSS, SPF_HELO_PASS,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Level: * X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1766563212419587854?= X-GMAIL-MSGID: =?utf-8?q?1766563212419587854?= Implement kvm handle vcpu iocsr exception, setting the iocsr info into vcpu_run and return to user space to handle it. Signed-off-by: Tianrui Zhao --- arch/loongarch/include/asm/inst.h | 16 ++++++ arch/loongarch/kvm/exit.c | 92 +++++++++++++++++++++++++++++++ 2 files changed, 108 insertions(+) diff --git a/arch/loongarch/include/asm/inst.h b/arch/loongarch/include/asm/inst.h index b09887ffcd15..db5857796432 100644 --- a/arch/loongarch/include/asm/inst.h +++ b/arch/loongarch/include/asm/inst.h @@ -56,6 +56,14 @@ enum reg2_op { revbd_op = 0x0f, revh2w_op = 0x10, revhd_op = 0x11, + iocsrrdb_op = 0x19200, + iocsrrdh_op = 0x19201, + iocsrrdw_op = 0x19202, + iocsrrdd_op = 0x19203, + iocsrwrb_op = 0x19204, + iocsrwrh_op = 0x19205, + iocsrwrw_op = 0x19206, + iocsrwrd_op = 0x19207, }; enum reg2i5_op { @@ -298,6 +306,13 @@ struct reg3sa2_format { unsigned int opcode : 15; }; +struct reg2csr_format { + unsigned int rd : 5; + unsigned int rj : 5; + unsigned int csr : 14; + unsigned int opcode : 8; +}; + union loongarch_instruction { unsigned int word; struct reg0i15_format reg0i15_format; @@ -313,6 +328,7 @@ union loongarch_instruction { struct reg2bstrd_format reg2bstrd_format; struct reg3_format reg3_format; struct reg3sa2_format reg3sa2_format; + struct reg2csr_format reg2csr_format; }; #define LOONGARCH_INSN_SIZE sizeof(union loongarch_instruction) diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index 508cbce31aa5..bd33fe0c6424 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -96,3 +96,95 @@ static int _kvm_handle_csr(struct kvm_vcpu *vcpu, larch_inst inst) return EMULATE_DONE; } + +int _kvm_emu_iocsr(larch_inst inst, struct kvm_run *run, struct kvm_vcpu *vcpu) +{ + u32 rd, rj, opcode; + u32 addr; + unsigned long val; + int ret; + + /* + * Each IOCSR with different opcode + */ + rd = inst.reg2_format.rd; + rj = inst.reg2_format.rj; + opcode = inst.reg2_format.opcode; + addr = vcpu->arch.gprs[rj]; + ret = EMULATE_DO_IOCSR; + run->iocsr_io.phys_addr = addr; + run->iocsr_io.is_write = 0; + + /* LoongArch is Little endian */ + switch (opcode) { + case iocsrrdb_op: + run->iocsr_io.len = 1; + break; + case iocsrrdh_op: + run->iocsr_io.len = 2; + break; + case iocsrrdw_op: + run->iocsr_io.len = 4; + break; + case iocsrrdd_op: + run->iocsr_io.len = 8; + break; + case iocsrwrb_op: + run->iocsr_io.len = 1; + run->iocsr_io.is_write = 1; + break; + case iocsrwrh_op: + run->iocsr_io.len = 2; + run->iocsr_io.is_write = 1; + break; + case iocsrwrw_op: + run->iocsr_io.len = 4; + run->iocsr_io.is_write = 1; + break; + case iocsrwrd_op: + run->iocsr_io.len = 8; + run->iocsr_io.is_write = 1; + break; + default: + ret = EMULATE_FAIL; + break; + } + + if (ret == EMULATE_DO_IOCSR) { + if (run->iocsr_io.is_write) { + val = vcpu->arch.gprs[rd]; + memcpy(run->iocsr_io.data, &val, run->iocsr_io.len); + } + vcpu->arch.io_gpr = rd; + } + + return ret; +} + +int _kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run) +{ + unsigned long *gpr = &vcpu->arch.gprs[vcpu->arch.io_gpr]; + enum emulation_result er = EMULATE_DONE; + + switch (run->iocsr_io.len) { + case 8: + *gpr = *(s64 *)run->iocsr_io.data; + break; + case 4: + *gpr = *(int *)run->iocsr_io.data; + break; + case 2: + *gpr = *(short *)run->iocsr_io.data; + break; + case 1: + *gpr = *(char *) run->iocsr_io.data; + break; + default: + kvm_err("Bad IOCSR length: %d,addr is 0x%lx", + run->iocsr_io.len, vcpu->arch.badv); + er = EMULATE_FAIL; + break; + } + + return er; +}