From: Dave Hansen <dave.hansen@intel.com>
To: "Huang, Kai" <kai.huang@intel.com>, Jarkko Sakkinen <jarkko@kernel.org>
Cc: Andrew Zaborowski <andrew.zaborowski@intel.com>,
x86@kernel.org, linux-sgx@vger.kernel.org,
linux-kernel@vger.kernel.org,
Dave Hansen <dave.hansen@linux.intel.com>,
Tony Luck <tony.luck@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@redhat.com>,
"H . Peter Anvin" <hpa@zytor.com>,
balrogg@gmail.com
Subject: Re: [PATCH] x86: sgx: Don't track poisoned pages for reclaiming
Date: Tue, 11 Feb 2025 15:31:54 -0800 [thread overview]
Message-ID: <7ed9b288-69a2-446c-9f7f-50ef6bc56673@intel.com> (raw)
In-Reply-To: <4a1c8b84-d8ee-414a-bd6d-a8633302dab4@intel.com>
On 2/11/25 13:18, Huang, Kai wrote:
>>> This requires low-level SGX implementation knowledge to fully
>>> understand. Both what "ETRACK, EBLOCK and EWB" are in the first place,
>>> how they are involved in reclaim and also why EREMOVE doesn't lead to
>>> the same fate.
>>
>> Does it? [I'll dig up Intel SDM to check this]
>>
> I just did. 🙂
>
> It seems EREMOVE only reads and updates the EPCM entry for the target
> EPC page but won't actually access that EPC page.
Actually, now that I think about it even more, why would ETRACK or
EBLOCK access the page itself? They seem superficially like they'd be
metadata-only too.
next prev parent reply other threads:[~2025-02-11 23:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-11 15:01 [PATCH] x86: sgx: Don't track poisoned pages for reclaiming Andrew Zaborowski
2025-02-11 16:25 ` Dave Hansen
2025-02-11 21:03 ` Jarkko Sakkinen
2025-02-11 21:18 ` Huang, Kai
2025-02-11 23:24 ` Jarkko Sakkinen
2025-02-11 23:31 ` Dave Hansen [this message]
2025-02-12 0:32 ` andrzej zaborowski
2025-02-12 0:37 ` Dave Hansen
2025-02-12 10:38 ` Huang, Kai
2025-02-12 21:25 ` Jarkko Sakkinen
2025-02-12 0:22 ` Andrew Zaborowski
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