From: Raghavendra Rao Ananta <rananta@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Marc Zyngier <maz@kernel.org>, Andrew Jones <drjones@redhat.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: kvm@vger.kernel.org, Catalin Marinas <catalin.marinas@arm.com>,
Peter Shier <pshier@google.com>,
linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 09/14] KVM: arm64: selftests: Add guest support to get the vcpuid
Date: Mon, 13 Sep 2021 20:49:25 +0000 [thread overview]
Message-ID: <20210913204930.130715-10-rananta@google.com> (raw)
In-Reply-To: <20210913204930.130715-1-rananta@google.com>
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>
---
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);
+}
--
2.33.0.309.g3052b89438-goog
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next prev parent reply other threads:[~2021-09-13 20:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-13 20:49 [PATCH v5 00/14] KVM: arm64: selftests: Introduce arch_timer selftest Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 01/14] KVM: arm64: selftests: Add MMIO readl/writel support Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 02/14] tools: arm64: Import sysreg.h Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 03/14] KVM: arm64: selftests: Use read/write definitions from sysreg.h Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 04/14] KVM: arm64: selftests: Introduce ARM64_SYS_KVM_REG Raghavendra Rao Ananta
2021-09-13 21:43 ` Ricardo Koller
2021-09-13 20:49 ` [PATCH v5 05/14] KVM: arm64: selftests: Add support for cpu_relax Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 06/14] KVM: arm64: selftests: Add basic support for arch_timers Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 07/14] KVM: arm64: selftests: Add basic support to generate delays Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 08/14] KVM: arm64: selftests: Add support to disable and enable local IRQs Raghavendra Rao Ananta
2021-09-13 20:49 ` Raghavendra Rao Ananta [this message]
2021-09-13 21:21 ` [PATCH v5 09/14] KVM: arm64: selftests: Add guest support to get the vcpuid Ricardo Koller
2021-09-13 20:49 ` [PATCH v5 10/14] KVM: arm64: selftests: Add light-weight spinlock support Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 11/14] KVM: arm64: selftests: Add basic GICv3 support Raghavendra Rao Ananta
2021-09-13 21:38 ` Ricardo Koller
2021-09-13 20:49 ` [PATCH v5 12/14] KVM: arm64: selftests: Add host support for vGIC Raghavendra Rao Ananta
2021-09-13 21:19 ` Ricardo Koller
2021-09-13 20:49 ` [PATCH v5 13/14] KVM: arm64: selftests: Add arch_timer test Raghavendra Rao Ananta
2021-09-13 20:49 ` [PATCH v5 14/14] KVM: arm64: selftests: arch_timer: Support vCPU migration Raghavendra Rao Ananta
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