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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=RPKmsJf8WZ0Uq/9BsypZtQKa6wrsTaT9QMXRWAn7wEs=; b=w/lXX9ve7Fu274YQUkMNDn0EaUJjNiSM6GysL+TYZY0ZewwkiFhZ3sFqEAzj9xKWvp QU8VNXklveF3znMwgQvTL8HksV9egAUl2d8UqGTjc8UXAJXqT8WAEtmB6QUjpzpBiADg omsHjERFe4xquc8Av7CNHWtGHMst+7N/uQDKXaEvysFq7RQIeQ3niN6nj7r9oMgZMhzX NqJMGaYIUG/beJiodBk6fTOLuWExgUhMQpuMSbgpxkBU+4gJzUrmMUevw3XOEvZzi4DD WYWJQYznoX6xRGUU7rWX0M25P4NP3QEuoyzBGdiRvolyUPTh+HJ3jfsBV9kfnzc8JMI+ ku2g== X-Gm-Message-State: AOAM5301XFewOY6tmYmw7WWDPZTdWxkogmApAAmT3scejfKtpzBR6LJZ fN00NZCNUFnN4UaJ8KWHDv2IUchOZwiT X-Google-Smtp-Source: ABdhPJyfvHspvKcMFJDqwp4bVITpxHQ5XcPoZyJH4ggpu00/5Mg05cH03Gxtzi5Vl/6xJeTsvycll8h+jzTh X-Received: from rananta-virt.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:1bcc]) (user=rananta job=sendgmr) by 2002:a25:9d01:: with SMTP id i1mr18564769ybp.88.1631566203899; Mon, 13 Sep 2021 13:50:03 -0700 (PDT) Date: Mon, 13 Sep 2021 20:49:25 +0000 In-Reply-To: <20210913204930.130715-1-rananta@google.com> Message-Id: <20210913204930.130715-10-rananta@google.com> Mime-Version: 1.0 References: <20210913204930.130715-1-rananta@google.com> X-Mailer: git-send-email 2.33.0.309.g3052b89438-goog Subject: [PATCH v5 09/14] KVM: arm64: selftests: Add guest support to get the vcpuid From: Raghavendra Rao Ananta To: Paolo Bonzini , Marc Zyngier , Andrew Jones , 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-20210913_135005_396494_2D9880C7 X-CRM114-Status: GOOD ( 11.13 ) 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 At times, such as when in the interrupt handler, the guest wants to get the vcpuid that it's running on to pull the per-cpu private data. As a result, introduce guest_get_vcpuid() that returns the vcpuid of the calling vcpu. The interface is architecture independent, but defined only for arm64 as of now. Suggested-by: Reiji Watanabe Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Ricardo Koller --- tools/testing/selftests/kvm/include/kvm_util.h | 2 ++ tools/testing/selftests/kvm/lib/aarch64/processor.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 010b59b13917..5770751a5735 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -400,4 +400,6 @@ uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc); int vm_get_stats_fd(struct kvm_vm *vm); int vcpu_get_stats_fd(struct kvm_vm *vm, uint32_t vcpuid); +int guest_get_vcpuid(void); + #endif /* SELFTEST_KVM_UTIL_H */ diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c index db64ee206064..f1255f44dad0 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/processor.c +++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c @@ -277,6 +277,7 @@ void aarch64_vcpu_setup(struct kvm_vm *vm, int vcpuid, struct kvm_vcpu_init *ini set_reg(vm, vcpuid, KVM_ARM64_SYS_REG(SYS_TCR_EL1), tcr_el1); set_reg(vm, vcpuid, KVM_ARM64_SYS_REG(SYS_MAIR_EL1), DEFAULT_MAIR_EL1); set_reg(vm, vcpuid, KVM_ARM64_SYS_REG(SYS_TTBR0_EL1), vm->pgd); + set_reg(vm, vcpuid, KVM_ARM64_SYS_REG(SYS_TPIDR_EL1), vcpuid); } void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent) @@ -426,3 +427,8 @@ void vm_install_exception_handler(struct kvm_vm *vm, int vector, assert(vector < VECTOR_NUM); handlers->exception_handlers[vector][0] = handler; } + +int guest_get_vcpuid(void) +{ + return read_sysreg(tpidr_el1); +}