From nobody Tue Dec 16 20:32:45 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 664F1C10DC1 for ; Thu, 30 Nov 2023 11:31:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345335AbjK3LbX (ORCPT ); Thu, 30 Nov 2023 06:31:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345279AbjK3LbA (ORCPT ); Thu, 30 Nov 2023 06:31:00 -0500 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 7F328198E; Thu, 30 Nov 2023 03:31:04 -0800 (PST) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8Dxl+h2cmhlBug9AA--.21699S3; Thu, 30 Nov 2023 19:31:02 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8AxG9xycmhlNblQAA--.47327S5; Thu, 30 Nov 2023 19:31:01 +0800 (CST) From: Tianrui Zhao To: Shuah Khan , Paolo Bonzini , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Sean Christopherson Cc: Vishal Annapurve , Huacai Chen , WANG Xuerui , loongarch@lists.linux.dev, Peter Xu , Vipin Sharma , maobibo@loongson.cn, zhaotianrui@loongson.cn Subject: [PATCH v5 3/4] KVM: selftests: Add ucall test support for LoongArch Date: Thu, 30 Nov 2023 19:18:03 +0800 Message-Id: <20231130111804.2227570-4-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20231130111804.2227570-1-zhaotianrui@loongson.cn> References: <20231130111804.2227570-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8AxG9xycmhlNblQAA--.47327S5 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add ucall test support for LoongArch. A ucall is a "hypercall to userspace". Signed-off-by: Tianrui Zhao Reviewed-by: Bibo Mao --- .../selftests/kvm/include/loongarch/ucall.h | 28 ++++++++++++++ .../selftests/kvm/lib/loongarch/ucall.c | 38 +++++++++++++++++++ 2 files changed, 66 insertions(+) create mode 100644 tools/testing/selftests/kvm/include/loongarch/ucall.h create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c diff --git a/tools/testing/selftests/kvm/include/loongarch/ucall.h b/tools/= testing/selftests/kvm/include/loongarch/ucall.h new file mode 100644 index 00000000000..e9033ea6fbf --- /dev/null +++ b/tools/testing/selftests/kvm/include/loongarch/ucall.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef SELFTEST_KVM_UCALL_H +#define SELFTEST_KVM_UCALL_H + +#include "kvm_util_base.h" + +#define UCALL_EXIT_REASON KVM_EXIT_MMIO + +/* + * Default base address for application loading is 0x120000000, + * DEFAULT_GUEST_TEST_MEM should be larger than app loading address, + * so that PER_VCPU_MEM_SIZE can be large enough, and kvm selftests + * app size is smaller than 256M in generic + */ +#define DEFAULT_GUEST_TEST_MEM 0x130000000 + +/* + * ucall_exit_mmio_addr holds per-VM values (global data is duplicated by = each + * VM), it must not be accessed from host code. + */ +extern vm_vaddr_t *ucall_exit_mmio_addr; + +static inline void ucall_arch_do_ucall(vm_vaddr_t uc) +{ + WRITE_ONCE(*ucall_exit_mmio_addr, uc); +} + +#endif diff --git a/tools/testing/selftests/kvm/lib/loongarch/ucall.c b/tools/test= ing/selftests/kvm/lib/loongarch/ucall.c new file mode 100644 index 00000000000..fc6cbb50573 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/loongarch/ucall.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ucall support. A ucall is a "hypercall to userspace". + * + */ +#include "kvm_util.h" + +/* + * ucall_exit_mmio_addr holds per-VM values (global data is duplicated by = each + * VM), it must not be accessed from host code. + */ +vm_vaddr_t *ucall_exit_mmio_addr; + +void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa) +{ + vm_vaddr_t mmio_gva =3D vm_vaddr_unused_gap(vm, vm->page_size, KVM_UTIL_M= IN_VADDR); + + virt_map(vm, mmio_gva, mmio_gpa, 1); + + vm->ucall_mmio_addr =3D mmio_gpa; + + write_guest_global(vm, ucall_exit_mmio_addr, (vm_vaddr_t *)mmio_gva); +} + +void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu) +{ + struct kvm_run *run =3D vcpu->run; + + if (run->exit_reason =3D=3D KVM_EXIT_MMIO && + run->mmio.phys_addr =3D=3D vcpu->vm->ucall_mmio_addr) { + TEST_ASSERT(run->mmio.is_write && run->mmio.len =3D=3D sizeof(uint64_t), + "Unexpected ucall exit mmio address access"); + + return (void *)(*((uint64_t *)run->mmio.data)); + } + + return NULL; +} --=20 2.39.1