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From: Julien Grall <julien.grall@arm.com>
To: xen-devel@lists.xen.org
Cc: Julien Grall <julien.grall@arm.com>,
	sstabellini@kernel.org, volodymyr_babchuk@epam.com,
	andre.przywara@linaro.org
Subject: [PATCH v2 08/15] xen/arm: smccc: Add macros SMCCC_VERSION, SMCCC_VERSION_{MINOR, MAJOR}
Date: Thu,  8 Feb 2018 19:21:56 +0000	[thread overview]
Message-ID: <20180208192203.9556-9-julien.grall@arm.com> (raw)
In-Reply-To: <20180208192203.9556-1-julien.grall@arm.com>

Add macros SMCCC_VERSION, SMCCC_VERSION_{MINOR, MAJOR} to easily convert
between a 32-bit value and a version number. The encoding is based on
2.2.2 in "Firmware interfaces for mitigation CVE-2017-5715" (ARM DEN 0070A).

Also re-use them to define ARM_SMCCC_VERSION_1_0 and ARM_SMCCC_VERSION_1_1.

Signed-off-by: Julien Grall <julien.grall@arm.com>

---
    Changes in v2:
        - Patch added
---
 xen/include/asm-arm/smccc.h | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/xen/include/asm-arm/smccc.h b/xen/include/asm-arm/smccc.h
index d24ccb51d8..caa2c9cc1b 100644
--- a/xen/include/asm-arm/smccc.h
+++ b/xen/include/asm-arm/smccc.h
@@ -16,8 +16,20 @@
 #ifndef __ASM_ARM_SMCCC_H__
 #define __ASM_ARM_SMCCC_H__
 
-#define ARM_SMCCC_VERSION_1_0   0x10000
-#define ARM_SMCCC_VERSION_1_1   0x10001
+#define SMCCC_VERSION_MAJOR_SHIFT            16
+#define SMCCC_VERSION_MINOR_MASK             \
+        ((1U << SMCCC_VERSION_MAJOR_SHIFT) - 1)
+#define SMCCC_VERSION_MAJOR_MASK             ~SMCCC_VERSION_MINOR_MASK
+#define SMCCC_VERSION_MAJOR(ver)             \
+        (((ver) & SMCCC_VERSION_MAJOR_MASK) >> SMCCC_VERSION_MAJOR_SHIFT)
+#define SMCCC_VERSION_MINOR(ver)             \
+        ((ver) & SMCCC_VERSION_MINOR_MASK)
+
+#define SMCCC_VERSION(major, minor)          \
+    (((major) << SMCCC_VERSION_MAJOR_SHIFT) | (minor))
+
+#define ARM_SMCCC_VERSION_1_0   SMCCC_VERSION(1, 0)
+#define ARM_SMCCC_VERSION_1_1   SMCCC_VERSION(1, 1)
 
 /*
  * This file provides common defines for ARM SMC Calling Convention as
-- 
2.11.0


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  parent reply	other threads:[~2018-02-08 19:21 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-08 19:21 [PATCH v2 00/15] xen/arm: PSCI 1.1 and SMCCC-1.1 support and XSA-254 variant 2 update Julien Grall
2018-02-08 19:21 ` [PATCH v2 01/15] xen/arm: psci: Rework the PSCI definitions Julien Grall
2018-02-08 19:21 ` [PATCH v2 02/15] xen/arm: vpsci: Add support for PSCI 1.1 Julien Grall
2018-02-09 16:07   ` Volodymyr Babchuk
2018-02-09 16:13     ` Julien Grall
2018-02-09 16:30       ` Volodymyr Babchuk
2018-02-12 14:43   ` Wei Liu
2018-02-12 20:12   ` Mirela Simonovic
2018-02-12 21:41     ` Julien Grall
2018-02-12 23:16       ` Mirela Simonovic
2018-02-12 23:44         ` Julien Grall
2018-02-14 19:14           ` Mirela Simonovic
2018-02-15 11:25             ` Julien Grall
2018-02-08 19:21 ` [PATCH v2 03/15] xen/arm: vsmc: Implement SMCCC 1.1 Julien Grall
2018-02-09 16:08   ` Volodymyr Babchuk
2018-02-09 16:15     ` Julien Grall
2018-02-09 16:47       ` Volodymyr Babchuk
2018-02-08 19:21 ` [PATCH v2 04/15] xen/arm: vsmc: Implement SMCCC_ARCH_WORKAROUND_1 BP hardening support Julien Grall
2018-02-20  0:26   ` Stefano Stabellini
2018-02-08 19:21 ` [PATCH v2 05/15] xen/arm: Adapt smccc.h to be able to use it in assembly code Julien Grall
2018-02-20  0:28   ` Stefano Stabellini
2018-02-08 19:21 ` [PATCH v2 06/15] xen/arm64: Implement a fast path for handling SMCCC_ARCH_WORKAROUND_1 Julien Grall
2018-02-08 19:21 ` [PATCH v2 07/15] xen/arm64: Print a per-CPU message with the BP hardening method used Julien Grall
2018-02-09 16:43   ` Volodymyr Babchuk
2018-02-08 19:21 ` Julien Grall [this message]
2018-02-09 16:11   ` [PATCH v2 08/15] xen/arm: smccc: Add macros SMCCC_VERSION, SMCCC_VERSION_{MINOR, MAJOR} Volodymyr Babchuk
2018-02-08 19:21 ` [PATCH v2 09/15] xen/arm: psci: Detect SMCCC version Julien Grall
2018-02-09 17:04   ` Volodymyr Babchuk
2018-02-09 17:09     ` Julien Grall
2018-02-12 14:43       ` Volodymyr Babchuk
2018-02-12 15:06         ` Julien Grall
2018-02-08 19:21 ` [PATCH v2 10/15] xen/arm: smccc: Implement SMCCC v1.1 inline primitive Julien Grall
2018-02-08 19:21 ` [PATCH v2 11/15] xen/arm64: Add ARM_SMCCC_ARCH_WORKAROUND_1 BP hardening support Julien Grall
2018-02-12 16:55   ` Volodymyr Babchuk
2018-02-12 17:12     ` Julien Grall
2018-02-12 17:20       ` Volodymyr Babchuk
2018-02-12 17:26         ` Julien Grall
2018-02-08 19:22 ` [PATCH v2 12/15] xen/arm64: Kill PSCI_GET_VERSION as a variant-2 workaround Julien Grall
2018-02-13 11:59   ` Volodymyr Babchuk
2018-02-08 19:22 ` [PATCH v2 13/15] xen/arm: vpsci: Remove parameter 'ver' from do_common_cpu Julien Grall
2018-02-08 19:22 ` [PATCH v2 14/15] xen/arm: psci: Consolidate PSCI version print Julien Grall
2018-02-09 16:40   ` Volodymyr Babchuk
2018-02-08 19:22 ` [PATCH v2 15/15] xen/arm: psci: Prefix with static any functions not exported Julien Grall
2018-02-09 16:40   ` Volodymyr Babchuk

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