From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5177CC7EE25 for ; Fri, 9 Jun 2023 00:23:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kJtnZPg7h7sgiiq/eDNijX+fD/XwzWxdrE+WsB9XyAU=; b=mlm/4nxStTAeUx BqH9zsXL3OUai5VgH5SO5YX+HWHj8wfv/7Qd8Sh0DgQ/HLfE0mYNC6YvIDGAC2pBrXLI5tZrJLgRx PAvII/nD3lvLVxDvf/FWmuYmF9t99LO15v8JRu9/oMG8y6XcFFgmV9DGCcsoq91VGKZTHERV98kdA i3W5506RK1KlS7J1NB6zGxzeEgzF6iK3Mw2fwF3JgLWJG++6fh2eYjhx5gVb+w3VHQFPRxVCQ5TIW MVICFs4t5qiiEVtSNB+3vPva1I2QDZCRvUXpsDpq+TnUAUvjeKWl/j97+QfjEpc0qh+wcaJc+8kUw Abvp+GcKbqgIBKEe+WRg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q7PuD-00B339-2N; Fri, 09 Jun 2023 00:23:05 +0000 Received: from mga06b.intel.com ([134.134.136.31] helo=mga06.intel.com) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q7Pu8-00B324-1J; Fri, 09 Jun 2023 00:23:01 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686270180; x=1717806180; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=hfORcgQzuOPbSklLPJdOW8LVCo5d5Go2LF+sADUuhiU=; b=KKj2g/8okkDMbg1JK1vlqBo5WO8T2Yg1lw+o3aF091wCdUalOduElHZE /Dm25vHxeFMHoGjV6sWSn5Su2YITlWNga4vMxgXE7dDv2kaHbMS3GgBB+ DCsYj58YJHY0MfAkyw2mT/fLUsyKAEFZ2x91wIwyDoHDjHnn0rfnygqnq udMIAAAlFmWvv9fmmv5e32stVYtfwOz2z395WKhNnSwHjmxOv0irJ/KtP KzeYl+aU2ZmFXkRyjXDZ/qalA+IdSgFWcYDGP09H4ACBHSCXnlwt9A+rT 1DmVw/jx3J7LG0OkeF6IfOuLjqXQU3ZbmHyMi3UlFPQ34jSHNAptUCuBJ A==; X-IronPort-AV: E=McAfee;i="6600,9927,10735"; a="421061877" X-IronPort-AV: E=Sophos;i="6.00,228,1681196400"; d="scan'208";a="421061877" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jun 2023 17:22:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10735"; a="884393196" X-IronPort-AV: E=Sophos;i="6.00,228,1681196400"; d="scan'208";a="884393196" Received: from yjiang5-mobl.amr.corp.intel.com (HELO localhost) ([10.144.161.97]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jun 2023 17:22:57 -0700 Date: Thu, 8 Jun 2023 17:22:57 -0700 From: Yunhong Jiang To: Andrew Cooper Cc: Thomas Gleixner , "Kirill A. Shutemov" , LKML , x86@kernel.org, David Woodhouse , Brian Gerst , Arjan van de Veen , Paolo Bonzini , Paul McKenney , Tom Lendacky , Sean Christopherson , Oleksandr Natalenko , Paul Menzel , "Guilherme G. Piccoli" , Piotr Gorski , Usama Arif , Juergen Gross , Boris Ostrovsky , xen-devel@lists.xenproject.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , Guo Ren , linux-csky@vger.kernel.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Mark Rutland , Sabin Rapan , "Michael Kelley (LINUX)" , Dave Hansen Subject: Re: [patch] x86/realmode: Make stack lock work in trampoline_compat() Message-ID: <20230609002257.GA3661@yjiang5-mobl.amr.corp.intel.com> References: <20230508185218.962208640@linutronix.de> <20230524204818.3tjlwah2euncxzmh@box.shutemov.name> <87y1lbl7r6.ffs@tglx> <87sfbhlwp9.ffs@tglx> <20230529023939.mc2akptpxcg3eh2f@box.shutemov.name> <87bki3kkfi.ffs@tglx> <20230529203129.sthnhzgds7ynddxd@box.shutemov.name> <87h6rujdvl.ffs@tglx> <20230608233402.GA3430@yjiang5-mobl.amr.corp.intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230608_172300_486324_FAD654D4 X-CRM114-Status: GOOD ( 25.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gRnJpLCBKdW4gMDksIDIwMjMgYXQgMTI6NTc6NDZBTSArMDEwMCwgQW5kcmV3IENvb3BlciB3 cm90ZToKPiBPbiAwOS8wNi8yMDIzIDEyOjM0IGFtLCBZdW5ob25nIEppYW5nIHdyb3RlOgo+ID4g T24gVHVlLCBNYXkgMzAsIDIwMjMgYXQgMTI6NDY6MjJQTSArMDIwMCwgVGhvbWFzIEdsZWl4bmVy IHdyb3RlOgo+ID4+IFRoZSBzdGFjayBsb2NraW5nIGFuZCBzdGFjayBhc3NpZ25tZW50IG1hY3Jv IExPQURfUkVBTE1PREVfRVNQIGZhaWxzIHRvCj4gPj4gd29yayB3aGVuIGludm9rZWQgZnJvbSB0 aGUgNjRiaXQgdHJhbXBvbGluZSBlbnRyeSBwb2ludDoKPiA+Pgo+ID4+IHRyYW1wb2xpbmVfc3Rh cnQ2NAo+ID4+ICAgdHJhbXBvbGluZV9jb21wYXQKPiA+PiAgICAgTE9BRF9SRUFMTU9ERV9FU1Ag PC0gbG9jawo+ID4gT25lIHBvc3NpYmx5IGR1bWIgcXVlc3Rpb24gYW5kIGhvcGUgZ2V0IHNvbWUg aGludHMuCj4gCj4gVGhlcmUncyBhIHBocmFzZS7CoCAiVGhlIG9ubHkgZHVtYiBxdWVzdGlvbiBp cyB0aGUgb25lIG5vdCBhc2tlZCIuCj4gCj4gSWYgeW91IGhhdmUgdGhpcyBxdWVzdGlvbiwgdGhl cmUncyBhbiBleGNlbGxlbnQgY2hhbmNlIHRoYXQgc29tZW9uZSBlbHNlCj4gcmVhZGluZyB0aGlz IHRocmVhZCBoYXMgdGhlIHNhbWUgcXVlc3Rpb24uCj4gCj4gPiAgVGhlIExPQURfUkVBTE1PREVf RVNQIGlzCj4gPiBkZWZpbmVkIHVuZGVyIC5jb2RlMTYgZGlyZWN0aXZlIGFuZCB3aWxsIGJlIHVz ZWQgYnkgMzItYml0IG1vZGUgY2FsbGVyIGFsc28uIElzCj4gPiBpdCBvayBiZWNhdXNlIHRoZSBp bnN0cnVjdGlvbnMgdGhlcmUgd2lsbCBiZSBzYW1lIGZvciBib3RoIDE2LWJpdCBhbmQgMzItYml0 PyBJCj4gPiBjaGVja2VkCj4gPiBodHRwczovL2Z0cC5nbnUub3JnL29sZC1nbnUvTWFudWFscy9n YXMtMi45LjEvaHRtbF9jaGFwdGVyL2FzXzE2Lmh0bWwjU0VDMjA1IGFuZAo+ID4gZG9uJ3QgZmlu ZCBtdWNoIGluZm9ybWF0aW9uIHRoZXJlLgo+IAo+IFRoZSBwb3NpdGlvbiBvZiB0aGUgTE9BRF9S RUFMTU9ERV9FU1AgLm1hY3JvIGl0c2VsZiBkb2Vzbid0IG1hdHRlci7CoAo+IEl0J3MganVzdCBz b21lIHRleHQgd2hpY2ggZ2V0cyBwYXN0ZWQgZWxzZXdoZXJlLsKgIEltYWdpbmUgaXQganVzdCB0 aGUKPiBzYW1lIGFzIHJ1bm5pbmcgdGhlIEMgcHJlcHJvY2Vzc29yIG9uIGEgZmlsZSBiZWZvcmUg Y29tcGlsaW5nIGl0Lgo+IAo+IEFzIHlvdSBub3RlLCBzb21lIGV4cGFuc2lvbnMgb2YgdGhlIG1h Y3JvIGFyZSBpbiAuY29kZTE2LCBhbmQgc29tZSBhcmUKPiBub3QuwqAgVGhpcyBkb2VzIHJlc3Vs dCBpbiBkaWZmZXJlbnQgYnl0ZXMgYmVpbmcgZW1pdHRlZC7CoCBUaGUgZGVmYXVsdAo+IG9wZXJh bmRzIHNpemUgZmxpcHMgYmV0d2VlbiAuY29kZTE2IGFuZCAuY29kZTMyLCBzbyB0aGVyZSB3aWxs IGJlIHNvbWUKPiAweDY2IHByZWZpeGVzIGluIG9uZSBtb2RlLCBhbmQgbm90IGluIG90aGVycy4K PiAKPiBUaGUgaW1wb3J0YW50IHBvaW50IGlzIHRoZSBsIHN1ZmZpeCBvbiBidHNsLCB3aGljaCBm b3JjZXMgaXQgdG8gYmUgbG9uZwo+ICgzMmJpdCkgaXJyZXNwZWN0aXZlIG9mIHRoZSBkZWZhdWx0 IG9wZXJhbmQgc2l6ZS4KPiAKPiBTbyB5ZXMsIGl0IHdpbGwgd29yaywgYnV0IHRoYXQncyBiZWNh dXNlIGdhcyBpcyBoYW5kbGluZyB0aGUgZGlmZmVyaW5nCj4gZW5jb2RpbmdzIGF1dG9tYXRpY2Fs bHkgYmFzZWQgb24gdGhlIGRlZmF1bHQgb3BlcmFuZCBzaXplIHdoZXJlIHRoZQo+IExPQURfUkVB TE1PREVfRVNQIGdldHMgZXhwYW5kZWQuCj4gCj4gSG9wZSB0aGlzIGhlbHBzLApUaGFuayB5b3Ug Zm9yIHRoZSBleHBsYWluYXRpb24sIGl0J3MgcXVpdGUgY2xlYXIgbm93Lgo+IAo+IH5BbmRyZXcK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFy bS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9y ZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1r ZXJuZWwK