linux-kernel - Re: [PATCH v2 5/9] KVM: selftests: move idt

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Date:   Mon, 21 Nov 2022 16:32:53 +0000
From:   Liam Merwick <liam.merwick@...cle.com>
To:     Maxim Levitsky <mlevitsk@...hat.com>, kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org,
        Chenyi Qiang <chenyi.qiang@...el.com>,
        Yang Zhong <yang.zhong@...el.com>, x86@...nel.org,
        Shuah Khan <shuah@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Colton Lewis <coltonlewis@...gle.com>,
        Borislav Petkov <bp@...en8.de>, Peter Xu <peterx@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Jim Mattson <jmattson@...gle.com>,
        linux-kselftest@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Wei Wang <wei.w.wang@...el.com>,
        David Matlack <dmatlack@...gle.com>,
        Liam Merwick <liam.merwick@...cle.com>
Subject: Re: [PATCH v2 5/9] KVM: selftests: move idt_entry to header

On 03/11/2022 14:13, Maxim Levitsky wrote:
> struct idt_entry will be used for a test which will break IDT on purpose.
> 
> Signed-off-by: Maxim Levitsky <mlevitsk@...hat.com>

Reviewed-by: Liam Merwick <liam.merwick@...cle.com>


> ---
>   .../selftests/kvm/include/x86_64/processor.h        | 13 +++++++++++++
>   tools/testing/selftests/kvm/lib/x86_64/processor.c  | 13 -------------
>   2 files changed, 13 insertions(+), 13 deletions(-)
> 
> diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
> index e8ca0d8a6a7e0a..5da0c5e2a7afc4 100644
> --- a/tools/testing/selftests/kvm/include/x86_64/processor.h
> +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
> @@ -748,6 +748,19 @@ struct ex_regs {
>   	uint64_t rflags;
>   };
>   
> +struct idt_entry {
> +	uint16_t offset0;
> +	uint16_t selector;
> +	uint16_t ist : 3;
> +	uint16_t : 5;
> +	uint16_t type : 4;
> +	uint16_t : 1;
> +	uint16_t dpl : 2;
> +	uint16_t p : 1;
> +	uint16_t offset1;
> +	uint32_t offset2; uint32_t reserved;
> +};
> +
>   void vm_init_descriptor_tables(struct kvm_vm *vm);
>   void vcpu_init_descriptor_tables(struct kvm_vcpu *vcpu);
>   void vm_install_exception_handler(struct kvm_vm *vm, int vector,
> diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
> index 39c4409ef56a6a..41c1c73c464d48 100644
> --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
> +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
> @@ -1074,19 +1074,6 @@ void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits)
>   	}
>   }
>   
> -struct idt_entry {
> -	uint16_t offset0;
> -	uint16_t selector;
> -	uint16_t ist : 3;
> -	uint16_t : 5;
> -	uint16_t type : 4;
> -	uint16_t : 1;
> -	uint16_t dpl : 2;
> -	uint16_t p : 1;
> -	uint16_t offset1;
> -	uint32_t offset2; uint32_t reserved;
> -};
> -
>   static void set_idt_entry(struct kvm_vm *vm, int vector, unsigned long addr,
>   			  int dpl, unsigned short selector)
>   {