Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <1adb03c8-1274-3898-0677-03015a1f5a5d@intel.com>
Date:   Thu, 22 Sep 2022 11:55:38 -0700
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.11.0
Subject: Re: [RFC PATCH 03/20] x86/sgx: Track owning enclave in VA EPC pages
Content-Language: en-US
To:     Kristen Carlson Accardi <kristen@linux.intel.com>,
        linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org,
        cgroups@vger.kernel.org, Jarkko Sakkinen <jarkko@kernel.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Cc:     Sean Christopherson <seanjc@google.com>
References: <20220922171057.1236139-1-kristen@linux.intel.com>
 <20220922171057.1236139-4-kristen@linux.intel.com>
From:   Dave Hansen <dave.hansen@intel.com>
In-Reply-To: <20220922171057.1236139-4-kristen@linux.intel.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 9/22/22 10:10, Kristen Carlson Accardi wrote:
> -struct sgx_epc_page *sgx_alloc_va_page(bool reclaim)
> +struct sgx_epc_page *sgx_alloc_va_page(struct sgx_encl *encl, bool reclaim)
>  {
>  	struct sgx_epc_page *epc_page;
>  	int ret;
> @@ -1218,6 +1219,8 @@ struct sgx_epc_page *sgx_alloc_va_page(bool reclaim)
>  		return ERR_PTR(-EFAULT);
>  	}
>  
> +	epc_page->owner = encl;
> +
>  	return epc_page;
>  }

BTW, is there a flag or any other way to tell to what kind of object
->owner points?