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From: Sathyanarayanan Kuppuswamy  <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Isaku Yamahata <isaku.yamahata@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org, Hans de Goede <hdegoede@redhat.com>,
	Mark Gross <mgross@linux.intel.com>,
	"H . Peter Anvin" <hpa@zytor.com>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Tony Luck <tony.luck@intel.com>, Andi Kleen <ak@linux.intel.com>,
	linux-kernel@vger.kernel.org,
	platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH v3 4/4] platform/x86: intel_tdx_attest: Add TDX Guest attestation interface driver
Date: Tue, 19 Apr 2022 18:26:43 -0700	[thread overview]
Message-ID: <dd4a2b16-397e-8866-0fd5-b5c5dfd453ab@linux.intel.com> (raw)
In-Reply-To: <20220420012032.GA2224031@ls.amr.corp.intel.com>



On 4/19/22 6:20 PM, Isaku Yamahata wrote:
> If timeout occurs, the state of adev->tdquote_buf is unknown.  It's not safe
> to continue to using adev->tdquote_buf.  VMM would continue to processing
> getquote request with this buffer.  What if TDX_CMD_GEN_QUOTE is issued again,
> and tdquote_buf is re-used?

This part is not clearly discussed in the specification. May be spec
should define some reasonable timeout and teardown details.

Regarding not using this buffer again, what happens if we de-allocate
it on timeout and the host still updates it?

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer

  reply	other threads:[~2022-04-20  1:26 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-15 22:01 [PATCH v3 0/4] Add TDX Guest Attestation support Kuppuswamy Sathyanarayanan
2022-04-15 22:01 ` [PATCH v3 1/4] x86/tdx: Add tdx_mcall_tdreport() API support Kuppuswamy Sathyanarayanan
2022-04-19  2:29   ` Kai Huang
2022-04-19  3:37     ` Sathyanarayanan Kuppuswamy
2022-04-19  3:51       ` Kai Huang
2022-04-19  3:53         ` Sathyanarayanan Kuppuswamy
2022-04-15 22:01 ` [PATCH v3 2/4] x86/tdx: Add tdx_hcall_get_quote() " Kuppuswamy Sathyanarayanan
2022-04-19  2:59   ` Kai Huang
2022-04-19  4:04     ` Sathyanarayanan Kuppuswamy
2022-04-19  4:40       ` Kai Huang
2022-04-19  5:28         ` Sathyanarayanan Kuppuswamy
2022-04-19  7:21           ` Kai Huang
2022-04-20  3:39   ` Aubrey Li
2022-04-20  7:16     ` Sathyanarayanan Kuppuswamy
2022-04-20  8:08       ` Aubrey Li
2022-04-22 17:24       ` Isaku Yamahata
2022-04-25  3:06         ` Aubrey Li
2022-04-15 22:01 ` [PATCH v3 3/4] x86/tdx: Add TDX Guest event notify interrupt support Kuppuswamy Sathyanarayanan
2022-04-15 22:01 ` [PATCH v3 4/4] platform/x86: intel_tdx_attest: Add TDX Guest attestation interface driver Kuppuswamy Sathyanarayanan
2022-04-19  7:47   ` Kai Huang
2022-04-19  8:13     ` Borislav Petkov
2022-04-19 12:48       ` Sathyanarayanan Kuppuswamy
2022-04-20 22:00         ` Borislav Petkov
2022-04-20 22:09           ` Sathyanarayanan Kuppuswamy
2022-04-21  9:10             ` Borislav Petkov
2022-04-21 14:54               ` Sathyanarayanan Kuppuswamy
2022-04-19  8:16     ` Kai Huang
2022-04-19 14:00       ` Sathyanarayanan Kuppuswamy
2022-04-19 22:38         ` Kai Huang
2022-04-19 14:13     ` Dave Hansen
2022-04-19 14:19       ` Sathyanarayanan Kuppuswamy
2022-04-19 14:24         ` Dave Hansen
2022-04-19 14:26           ` Sathyanarayanan Kuppuswamy
2022-04-19 22:21       ` Kai Huang
2022-04-19 22:49         ` Dave Hansen
2022-04-19 23:02           ` Kai Huang
2022-04-20  1:20   ` Isaku Yamahata
2022-04-20  1:26     ` Sathyanarayanan Kuppuswamy [this message]
2022-04-21  7:04       ` Isaku Yamahata
2022-04-21 14:44         ` Sathyanarayanan Kuppuswamy
2022-04-20 23:18   ` Kai Huang
2022-04-20 23:45     ` Sathyanarayanan Kuppuswamy
2022-04-21  0:11       ` Kai Huang
2022-04-21  2:42         ` Sathyanarayanan Kuppuswamy
2022-04-21  6:57           ` Isaku Yamahata
2022-04-21 10:33             ` Kai Huang
2022-04-21 14:53             ` Sathyanarayanan Kuppuswamy
2022-04-21 16:53               ` Isaku Yamahata

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