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From: Sean Christopherson <seanjc@google.com>
To: Marc Zyngier <maz@kernel.org>,
	Oliver Upton <oliver.upton@linux.dev>,
	 Paolo Bonzini <pbonzini@redhat.com>,
	Christian Borntraeger <borntraeger@linux.ibm.com>,
	 Janosch Frank <frankja@linux.ibm.com>,
	Claudio Imbrenda <imbrenda@linux.ibm.com>,
	 Sean Christopherson <seanjc@google.com>,
	Anup Patel <anup@brainfault.org>,
	 Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	 Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
	 kvm@vger.kernel.org, kvm-riscv@lists.infradead.org,
	 linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	 Ackerley Tng <ackerleytng@google.com>
Subject: [PATCH 11/18] KVM: selftests: Map x86's exception_handlers at VM creation, not vCPU setup
Date: Thu, 14 Mar 2024 16:26:30 -0700	[thread overview]
Message-ID: <20240314232637.2538648-12-seanjc@google.com> (raw)
In-Reply-To: <20240314232637.2538648-1-seanjc@google.com>

Map x86's exception handlers at VM creation, not vCPU setup, as the
mapping is per-VM, i.e. doesn't need to be (re)done for every vCPU.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 tools/testing/selftests/kvm/lib/x86_64/processor.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 5813d93b2e7c..f4046029f168 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -552,7 +552,6 @@ static void vcpu_init_descriptor_tables(struct kvm_vcpu *vcpu)
 	sregs.gdt.limit = getpagesize() - 1;
 	kvm_seg_set_kernel_data_64bit(NULL, DEFAULT_DATA_SELECTOR, &sregs.gs);
 	vcpu_sregs_set(vcpu, &sregs);
-	*(vm_vaddr_t *)addr_gva2hva(vm, (vm_vaddr_t)(&exception_handlers)) = vm->handlers;
 }
 
 static void vcpu_init_sregs(struct kvm_vm *vm, struct kvm_vcpu *vcpu)
@@ -651,6 +650,8 @@ static void vm_init_descriptor_tables(struct kvm_vm *vm)
 	for (i = 0; i < NUM_INTERRUPTS; i++)
 		set_idt_entry(vm, i, (unsigned long)(&idt_handlers)[i], 0,
 			DEFAULT_CODE_SELECTOR);
+
+	*(vm_vaddr_t *)addr_gva2hva(vm, (vm_vaddr_t)(&exception_handlers)) = vm->handlers;
 }
 
 void vm_install_exception_handler(struct kvm_vm *vm, int vector,
-- 
2.44.0.291.gc1ea87d7ee-goog


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  parent reply	other threads:[~2024-03-15  0:32 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-14 23:26 [PATCH 00/18] KVM: selftests: Clean up x86's DT initialization Sean Christopherson
2024-03-14 23:26 ` [PATCH 01/18] Revert "kvm: selftests: move base kvm_util.h declarations to kvm_util_base.h" Sean Christopherson
2024-03-28  2:49   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 02/18] KVM: sefltests: Add kvm_util_types.h to hold common types, e.g. vm_vaddr_t Sean Christopherson
2024-03-28  2:48   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 03/18] KVM: selftests: Move GDT, IDT, and TSS fields to x86's kvm_vm_arch Sean Christopherson
2024-03-28  2:48   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 04/18] KVM: selftests: Fix off-by-one initialization of GDT limit Sean Christopherson
2024-03-14 23:26 ` [PATCH 05/18] KVM: selftests: Move platform_info_test's main assert into guest code Sean Christopherson
2024-03-14 23:26 ` [PATCH 06/18] KVM: selftests: Rework platform_info_test to actually verify #GP Sean Christopherson
2024-03-14 23:26 ` [PATCH 07/18] KVM: selftests: Explicitly clobber the IDT in the "delete memslot" testcase Sean Christopherson
2024-03-14 23:26 ` [PATCH 08/18] KVM: selftests: Move x86's descriptor table helpers "up" in processor.c Sean Christopherson
2024-03-28  2:47   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 09/18] KVM: selftests: Rename x86's vcpu_setup() to vcpu_init_sregs() Sean Christopherson
2024-03-28  2:47   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 10/18] KVM: selftests: Init IDT and exception handlers for all VMs/vCPUs on x86 Sean Christopherson
2024-03-28  2:46   ` Ackerley Tng
2024-03-14 23:26 ` Sean Christopherson [this message]
2024-03-28  2:35   ` [PATCH 11/18] KVM: selftests: Map x86's exception_handlers at VM creation, not vCPU setup Ackerley Tng
2024-03-14 23:26 ` [PATCH 12/18] KVM: selftests: Allocate x86's GDT during VM creation Sean Christopherson
2024-03-28  2:33   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 13/18] KVM: selftests: Drop superfluous switch() on vm->mode in vcpu_init_sregs() Sean Christopherson
2024-03-28  2:28   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 14/18] KVM: selftests: Fold x86's descriptor tables helpers into vcpu_init_sregs() Sean Christopherson
2024-03-28  2:50   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 15/18] KVM: selftests: Allocate x86's TSS at VM creation Sean Christopherson
2024-03-28  2:50   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 16/18] KVM: selftests: Add macro for TSS selector, rename up code/data macros Sean Christopherson
2024-03-28  2:52   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 17/18] KVM: selftests: Init x86's segments during VM creation Sean Christopherson
2024-03-28  2:51   ` Ackerley Tng
2024-03-14 23:26 ` [PATCH 18/18] KVM: selftests: Drop @selector from segment helpers Sean Christopherson
2024-03-28  2:51   ` Ackerley Tng
2024-04-29 20:45 ` [PATCH 00/18] KVM: selftests: Clean up x86's DT initialization Sean Christopherson

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