From: Andrew Jones <drjones@redhat.com>
To: Raghavendra Rao Ananta <rananta@google.com>
Cc: kvm@vger.kernel.org, Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Peter Shier <pshier@google.com>,
linux-kernel@vger.kernel.org, Marc Zyngier <maz@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v7 10/15] KVM: arm64: selftests: Add guest support to get the vcpuid
Date: Wed, 15 Sep 2021 07:55:22 +0200 [thread overview]
Message-ID: <20210915055522.o3wnygwk6bpr4zrx@gator.home> (raw)
In-Reply-To: <20210914223114.435273-11-rananta@google.com>
On Tue, Sep 14, 2021 at 10:31:09PM +0000, Raghavendra Rao Ananta wrote:
> 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 <reijiw@google.com>
> Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
> Reviewed-by: Ricardo Koller <ricarkol@google.com>
> Reviewed-by: Reiji Watanabe <reijiw@google.com>
> ---
> 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..bcf05f5381ed 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);
>
> +uint32_t 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 34f6bd47661f..b4eeeafd2a70 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, uint32_t vcpuid, struct kvm_vcpu_init
> 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;
> }
> +
> +uint32_t guest_get_vcpuid(void)
> +{
> + return read_sysreg(tpidr_el1);
> +}
> --
> 2.33.0.309.g3052b89438-goog
>
Reviewed-by: Andrew Jones <drjones@redhat.com>
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next prev parent reply other threads:[~2021-09-15 5:55 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-14 22:30 [PATCH v7 00/15] KVM: arm64: selftests: Introduce arch_timer selftest Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 01/15] KVM: arm64: selftests: Add MMIO readl/writel support Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 02/15] tools: arm64: Import sysreg.h Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 03/15] KVM: arm64: selftests: Use read/write definitions from sysreg.h Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 04/15] KVM: arm64: selftests: Introduce ARM64_SYS_KVM_REG Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 05/15] KVM: arm64: selftests: Add support for cpu_relax Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 06/15] KVM: arm64: selftests: Add basic support for arch_timers Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 07/15] KVM: arm64: selftests: Add basic support to generate delays Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 08/15] KVM: arm64: selftests: Add support to disable and enable local IRQs Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 09/15] KVM: arm64: selftests: Maintain consistency for vcpuid type Raghavendra Rao Ananta
2021-09-15 5:54 ` Andrew Jones
2021-09-14 22:31 ` [PATCH v7 10/15] KVM: arm64: selftests: Add guest support to get the vcpuid Raghavendra Rao Ananta
2021-09-15 5:55 ` Andrew Jones [this message]
2021-09-14 22:31 ` [PATCH v7 11/15] KVM: arm64: selftests: Add light-weight spinlock support Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 12/15] KVM: arm64: selftests: Add basic GICv3 support Raghavendra Rao Ananta
2021-09-30 8:06 ` Zenghui Yu
2021-10-04 18:26 ` Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 13/15] KVM: arm64: selftests: Add host support for vGIC Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 14/15] KVM: arm64: selftests: Add arch_timer test Raghavendra Rao Ananta
2021-09-14 22:31 ` [PATCH v7 15/15] KVM: arm64: selftests: arch_timer: Support vCPU migration Raghavendra Rao Ananta
2021-09-30 9:41 ` Zenghui Yu
2021-10-04 18:23 ` Raghavendra Rao Ananta
2021-09-28 17:02 ` [PATCH v7 00/15] KVM: arm64: selftests: Introduce arch_timer selftest Raghavendra Rao Ananta
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