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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=Wxf2Q9G637jni9KHKd5rXQqnKCGDoBa52DRcml59SiU=; b=P0uvKyfR32POkpzu9BAPrgwqeZpI2Zu0u2BaXwFPcy0l4W5iH/atLhirEy8w3a8y3J xE9Yv4PlP83lJAftXc8d08ru5cho/TSvMmZ+l/sIRQwCKbaUy3/dRaR/QO3Dvx5UyJ2k y4dh5IEvLfB7Hml/iseAsw5Lr69/WgQi8X9r8xmtgrAce/Pmy7XwEahCSA1QNCTWdRky JmA15I7rkg/SuHlzEdHPepnv82JiIefSykjg74yZTcImGIVu/dibaYt4rusfDIO2py8a F3tgdDBNlwAkGZscxv/5scxhDlagMAluiV/hbuvo+wGSwr8UQnYhutoOjGEqOxBia7fL +DgA== X-Gm-Message-State: AOAM533UfCY/9/uOefkN7+QWStQ/TmKV3DDjdnFAVDgPIsAd+I0BEiZw f0yFf3cCDM6se8AGjrL7Q34SY8fiwrRY X-Google-Smtp-Source: ABdhPJwHjSrW5jMuc543Z6g/BHvdlyhX5TEwY2mEfK1G/Ib27DMWkeFlybXzt0MSBsuOg1QGYuWx3Ouzvoug X-Received: from rananta-virt.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:1bcc]) (user=rananta job=sendgmr) by 2002:a05:6902:704:: with SMTP id k4mr2061074ybt.419.1630530883870; Wed, 01 Sep 2021 14:14:43 -0700 (PDT) Date: Wed, 1 Sep 2021 21:14:10 +0000 In-Reply-To: <20210901211412.4171835-1-rananta@google.com> Message-Id: <20210901211412.4171835-11-rananta@google.com> Mime-Version: 1.0 References: <20210901211412.4171835-1-rananta@google.com> X-Mailer: git-send-email 2.33.0.153.gba50c8fa24-goog Subject: [PATCH v3 10/12] KVM: arm64: selftests: Add host support for vGIC From: Raghavendra Rao Ananta To: Paolo Bonzini , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose Cc: Catalin Marinas , Will Deacon , Peter Shier , Ricardo Koller , Oliver Upton , Reiji Watanabe , Jing Zhang , Raghavendra Rao Anata , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, kvm@vger.kernel.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210901_141445_542217_9E2E8F46 X-CRM114-Status: GOOD ( 17.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Implement a simple library to do perform vGIC-v3 setup from a host of view. This includes creating a vGIC device, setting up distributor and redistributor attributes, and mapping the guest physical addresses. Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Andrew Jones --- tools/testing/selftests/kvm/Makefile | 2 +- .../selftests/kvm/include/aarch64/vgic.h | 14 ++++ .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++++++++++++++++++ 3 files changed, 82 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/kvm/include/aarch64/vgic.h create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 5476a8ddef60..8342f65c1d96 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -35,7 +35,7 @@ endif LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/rbtree.c lib/sparsebit.c lib/test_util.c lib/guest_modes.c lib/perf_test_util.c LIBKVM_x86_64 = lib/x86_64/apic.c lib/x86_64/processor.c lib/x86_64/vmx.c lib/x86_64/svm.c lib/x86_64/ucall.c lib/x86_64/handlers.S -LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c +LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c lib/aarch64/handlers.S lib/aarch64/spinlock.c lib/aarch64/gic.c lib/aarch64/gic_v3.c lib/aarch64/vgic.c LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test diff --git a/tools/testing/selftests/kvm/include/aarch64/vgic.h b/tools/testing/selftests/kvm/include/aarch64/vgic.h new file mode 100644 index 000000000000..45bbf238147a --- /dev/null +++ b/tools/testing/selftests/kvm/include/aarch64/vgic.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * ARM Generic Interrupt Controller (GIC) host specific defines + */ + +#ifndef SELFTEST_KVM_VGIC_H +#define SELFTEST_KVM_VGIC_H + +#include + +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa, uint32_t slot); + +#endif /* SELFTEST_KVM_VGIC_H */ diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c new file mode 100644 index 000000000000..a0e4b986d335 --- /dev/null +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ARM Generic Interrupt Controller (GIC) v3 host support + */ + +#include +#include + +#include "kvm_util.h" + +#define VGIC_V3_GICD_SZ (SZ_64K) +#define VGIC_V3_GICR_SZ (2 * SZ_64K) + +#define REDIST_REGION_ATTR_ADDR(count, base, flags, index) \ + (((uint64_t)(count) << 52) | \ + ((uint64_t)((base) >> 16) << 16) | \ + ((uint64_t)(flags) << 12) | \ + index) + +static void vgic_v3_map(struct kvm_vm *vm, uint64_t addr, unsigned int size) +{ + unsigned int n_pages = DIV_ROUND_UP(size, vm_get_page_size(vm)); + + virt_map(vm, addr, addr, n_pages); +} + +/* + * vGIC-v3 default host setup + * + * Input args: + * vm - KVM VM + * nr_vcpus - Number of vCPUs for this VM + * gicd_base_gpa - Guest Physical Address of the Distributor region + * gicr_base_gpa - Guest Physical Address of the Redistributor region + * + * Output args: None + * + * Return: GIC file-descriptor or negative error code upon failure + * + * The function creates a vGIC-v3 device and maps the distributor and + * redistributor regions of the guest. + */ +int vgic_v3_setup(struct kvm_vm *vm, unsigned int nr_vcpus, + uint64_t gicd_base_gpa, uint64_t gicr_base_gpa) +{ + uint64_t redist_attr; + int gic_fd; + + TEST_ASSERT(nr_vcpus <= KVM_MAX_VCPUS, + "Invalid number of CPUs: %u\n", nr_vcpus); + + gic_fd = kvm_create_device(vm, KVM_DEV_TYPE_ARM_VGIC_V3, false); + + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_DIST, &gicd_base_gpa, true); + vgic_v3_map(vm, gicd_base_gpa, VGIC_V3_GICD_SZ); + + redist_attr = REDIST_REGION_ATTR_ADDR(nr_vcpus, gicr_base_gpa, 0, 0); + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR, + KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &redist_attr, true); + vgic_v3_map(vm, gicr_base_gpa, VGIC_V3_GICR_SZ * nr_vcpus); + + kvm_device_access(gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, + KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); + + return gic_fd; +}