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X-CSE-ConnectionGUID: ZbOGfU6HT8GpCPNxIduq2A== X-CSE-MsgGUID: xXEZ5ytiRjWFG2FnU9nYUw== X-IronPort-AV: E=McAfee;i="6800,10657,11867"; a="86537101" X-IronPort-AV: E=Sophos;i="6.25,209,1779174000"; d="scan'208";a="86537101" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2026 15:17:13 -0700 X-CSE-ConnectionGUID: pgbksiNvQF+0qmnzMV8fkw== X-CSE-MsgGUID: 1QZ6d/pCQ6GP1erwZp89QA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,209,1779174000"; d="scan'208";a="259617270" Received: from sghuge-mobl2.amr.corp.intel.com (HELO [10.125.109.157]) ([10.125.109.157]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2026 15:17:12 -0700 Message-ID: Date: Thu, 6 Aug 2026 15:17:11 -0700 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 05/11] x86/virt/tdx: Handle multiple callers in tdx_pamt_get/put() To: Rick Edgecombe , bp@alien8.de, hpa@zytor.com, kas@kernel.org, kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, nik.borisov@suse.com, pbonzini@redhat.com, seanjc@google.com, tglx@kernel.org, vannapurve@google.com, x86@kernel.org, chao.gao@intel.com, yan.y.zhao@intel.com, kai.huang@intel.com, tony.lindgren@linux.intel.com, binbin.wu@intel.com, sohil.mehta@intel.com Cc: Hongyu Ning , Binbin Wu References: <20260806020850.1221381-1-rick.p.edgecombe@intel.com> <20260806020850.1221381-6-rick.p.edgecombe@intel.com> From: Dave Hansen Content-Language: en-US Autocrypt: addr=dave.hansen@intel.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 8/5/26 19:08, Rick Edgecombe wrote: > From: "Kirill A. Shutemov" > > tdx_pamt_get()/tdx_pamt_put() unconditionally add or remove Dynamic PAMT > backing for the 2MB region covering the passed page. However, multiple > callers can add or remove 4KB pages that fall within the same 2MB region > and in that scenario only a single PAMT entry is required. Reviewed-by: Dave Hansen