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X-CSE-ConnectionGUID: FtuZiAEqTESEq1Lrk10yFA== X-CSE-MsgGUID: QFGOLNHrRryUTNbjwwDb+g== X-IronPort-AV: E=McAfee;i="6800,10657,11644"; a="55427479" X-IronPort-AV: E=Sophos;i="6.21,154,1763452800"; d="scan'208";a="55427479" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Dec 2025 14:32:31 -0800 X-CSE-ConnectionGUID: BqZjr3JNRYWOf+Dimt0+Aw== X-CSE-MsgGUID: FIkHPVcST0GPR3E6ocv8pw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,154,1763452800"; d="scan'208";a="228831610" Received: from ssimmeri-mobl2.amr.corp.intel.com (HELO [10.125.110.199]) ([10.125.110.199]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Dec 2025 14:32:31 -0800 Message-ID: <5c4734af-d72c-4b1d-9d2f-8c07d4c0dd6d@intel.com> Date: Tue, 16 Dec 2025 14:32:30 -0800 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v15 22/28] x86: Secure Launch kernel early boot stub To: Ross Philipson , linux-kernel@vger.kernel.org, x86@kernel.org, linux-integrity@vger.kernel.org, linux-doc@vger.kernel.org, linux-crypto@vger.kernel.org, kexec@lists.infradead.org, linux-efi@vger.kernel.org, iommu@lists.linux.dev Cc: dpsmith@apertussolutions.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, dave.hansen@linux.intel.com, ardb@kernel.org, mjg59@srcf.ucam.org, James.Bottomley@hansenpartnership.com, peterhuewe@gmx.de, jarkko@kernel.org, jgg@ziepe.ca, luto@amacapital.net, nivedita@alum.mit.edu, herbert@gondor.apana.org.au, davem@davemloft.net, corbet@lwn.net, ebiederm@xmission.com, dwmw2@infradead.org, baolu.lu@linux.intel.com, kanth.ghatraju@oracle.com, andrew.cooper3@citrix.com, trenchboot-devel@googlegroups.com References: <20251215233316.1076248-1-ross.philipson@oracle.com> <20251215233316.1076248-23-ross.philipson@oracle.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 12/15/25 15:33, Ross Philipson wrote: > +static u64 sl_txt_read(u32 reg) > +{ > + return readq((void *)(u64)(TXT_PRIV_CONFIG_REGS_BASE + reg)); > +} > + > +static void sl_txt_write(u32 reg, u64 val) > +{ > + writeq(val, (void *)(u64)(TXT_PRIV_CONFIG_REGS_BASE + reg)); > +} Man, that's a lot of casting. If TXT_PRIV_CONFIG_REGS_BASE were just a pointer to being with, it could be: writeq(val, TXT_PRIV_CONFIG_REGS_BASE + reg); Right? This _looks_ like it was just written and then had casts added to it until it compiled.