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From: Sean Christopherson <seanjc@google.com>
To: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
	Hou Wenlong <houwenlong.hwl@antgroup.com>,
	Lai Jiangshan <laijs@linux.alibaba.com>
Subject: Re: [kvm-unit-tests PATCH V2] x86: Add a test to check effective permissions
Date: Fri, 4 Jun 2021 21:40:07 +0000	[thread overview]
Message-ID: <YLqdt11W6R4FgoIY@google.com> (raw)
In-Reply-To: <20210603225851.26621-1-jiangshanlai@gmail.com>

On Fri, Jun 04, 2021, Lai Jiangshan wrote:
> @@ -326,6 +335,7 @@ static pt_element_t ac_test_alloc_pt(ac_pool_t *pool)
>  {
>      pt_element_t ret = pool->pt_pool + pool->pt_pool_current;
>      pool->pt_pool_current += PAGE_SIZE;
> +    memset(va(ret), 0, PAGE_SIZE);

Should this go in a separate patch?  This seems like a bug fix.

>      return ret;
>  }
>  
> +static int check_effective_sp_permissions(ac_pool_t *pool)
> +{
> +	unsigned long ptr1 = 0x123480000000;
> +	unsigned long ptr2 = ptr1 + 2 * 1024 * 1024;
> +	unsigned long ptr3 = ptr1 + 1 * 1024 * 1024 * 1024;
> +	unsigned long ptr4 = ptr3 + 2 * 1024 * 1024;

I belatedly remembered we have SZ_2M and SZ_1G, I think we can use those here
instead of open coding the math.

  reply	other threads:[~2021-06-04 21:40 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-03  5:05 [kvm-unit-tests PATCH] x86: test combined access Lai Jiangshan
2021-06-03 18:39 ` Sean Christopherson
2021-06-03 22:58   ` [kvm-unit-tests PATCH V2] x86: Add a test to check effective permissions Lai Jiangshan
2021-06-04 21:40     ` Sean Christopherson [this message]
2021-06-06  3:20       ` Lai Jiangshan
2021-06-05 17:49         ` [kvm-unit-tests PATCH V3] " Lai Jiangshan
2021-06-08  0:24           ` Sean Christopherson
2021-06-08 18:49           ` Paolo Bonzini

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