From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932190AbeCLMXZ (ORCPT ); Mon, 12 Mar 2018 08:23:25 -0400 Received: from terminus.zytor.com ([198.137.202.136]:44931 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751502AbeCLMXW (ORCPT ); Mon, 12 Mar 2018 08:23:22 -0400 Date: Mon, 12 Mar 2018 05:23:00 -0700 From: "tip-bot for Kirill A. Shutemov" Message-ID: Cc: kai.huang@linux.intel.com, torvalds@linux-foundation.org, tglx@linutronix.de, thomas.lendacky@amd.com, mingo@kernel.org, hpa@zytor.com, peterz@infradead.org, kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, dave.hansen@intel.com Reply-To: dave.hansen@intel.com, kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, peterz@infradead.org, tglx@linutronix.de, thomas.lendacky@amd.com, hpa@zytor.com, mingo@kernel.org, torvalds@linux-foundation.org, kai.huang@linux.intel.com In-Reply-To: <20180305162610.37510-6-kirill.shutemov@linux.intel.com> References: <20180305162610.37510-6-kirill.shutemov@linux.intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/mm] x86/pconfig: Provide defines and helper to run MKTME_KEY_PROG leaf Git-Commit-ID: 24c517856af6511be1339dd55edd131160e37aac X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 24c517856af6511be1339dd55edd131160e37aac Gitweb: https://git.kernel.org/tip/24c517856af6511be1339dd55edd131160e37aac Author: Kirill A. Shutemov AuthorDate: Mon, 5 Mar 2018 19:25:53 +0300 Committer: Ingo Molnar CommitDate: Mon, 12 Mar 2018 12:10:54 +0100 x86/pconfig: Provide defines and helper to run MKTME_KEY_PROG leaf MKTME_KEY_PROG allows to manipulate MKTME keys in the CPU. Signed-off-by: Kirill A. Shutemov Cc: Dave Hansen Cc: Kai Huang Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Tom Lendacky Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20180305162610.37510-6-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar --- arch/x86/include/asm/intel_pconfig.h | 50 ++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/arch/x86/include/asm/intel_pconfig.h b/arch/x86/include/asm/intel_pconfig.h index fb7a37c3798b..3cb002b1d0f9 100644 --- a/arch/x86/include/asm/intel_pconfig.h +++ b/arch/x86/include/asm/intel_pconfig.h @@ -12,4 +12,54 @@ enum pconfig_target { int pconfig_target_supported(enum pconfig_target target); +enum pconfig_leaf { + MKTME_KEY_PROGRAM = 0, + PCONFIG_LEAF_INVALID, +}; + +#define PCONFIG ".byte 0x0f, 0x01, 0xc5" + +/* Defines and structure for MKTME_KEY_PROGRAM of PCONFIG instruction */ + +/* mktme_key_program::keyid_ctrl COMMAND, bits [7:0] */ +#define MKTME_KEYID_SET_KEY_DIRECT 0 +#define MKTME_KEYID_SET_KEY_RANDOM 1 +#define MKTME_KEYID_CLEAR_KEY 2 +#define MKTME_KEYID_NO_ENCRYPT 3 + +/* mktme_key_program::keyid_ctrl ENC_ALG, bits [23:8] */ +#define MKTME_AES_XTS_128 (1 << 8) + +/* Return codes from the PCONFIG MKTME_KEY_PROGRAM */ +#define MKTME_PROG_SUCCESS 0 +#define MKTME_INVALID_PROG_CMD 1 +#define MKTME_ENTROPY_ERROR 2 +#define MKTME_INVALID_KEYID 3 +#define MKTME_INVALID_ENC_ALG 4 +#define MKTME_DEVICE_BUSY 5 + +/* Hardware requires the structure to be 256 byte alinged. Otherwise #GP(0). */ +struct mktme_key_program { + u16 keyid; + u32 keyid_ctrl; + u8 __rsvd[58]; + u8 key_field_1[64]; + u8 key_field_2[64]; +} __packed __aligned(256); + +static inline int mktme_key_program(struct mktme_key_program *key_program) +{ + unsigned long rax = MKTME_KEY_PROGRAM; + + if (!pconfig_target_supported(MKTME_TARGET)) + return -ENXIO; + + asm volatile(PCONFIG + : "=a" (rax), "=b" (key_program) + : "0" (rax), "1" (key_program) + : "memory", "cc"); + + return rax; +} + #endif /* _ASM_X86_INTEL_PCONFIG_H */