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Message-Id: <1500480092-28480-4-git-send-email-mark.rutland@arm.com>
Date: Wed, 19 Jul 2017 17:01:24 +0100
From: Mark Rutland <mark.rutland@....com>
To: linux-arm-kernel@...ts.infradead.org
Cc: arnd@...db.de,
catalin.marinas@....com,
christoffer.dall@...aro.org,
Dave.Martin@....com,
jiong.wang@....com,
kvmarm@...ts.cs.columbia.edu,
linux-arch@...r.kernel.org,
marc.zyngier@....com,
mark.rutland@....com,
suzuki.poulose@....com,
will.deacon@....com,
yao.qi@....com,
linux-kernel@...r.kernel.org,
kernel-hardening@...ts.openwall.com
Subject: [PATCH 03/11] arm64: add pointer authentication register bits
The ARMv8.3 pointer authentication extension adds:
* New fields in ID_AA64ISAR1 to report the presence of pointer
authentication functionality.
* New control bits in SCTLR_ELx to enable this functionality.
* New system registers to hold the keys necessary for this
functionality.
* A new ESR_ELx.EC code used when the new instructions are affected by
configurable traps
This patch adds the relevant definitions to <asm/sysreg.h> and
<asm/esr.h> for these, to be used by subsequent patches.
Signed-off-by: Mark Rutland <mark.rutland@....com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>
Cc: Will Deacon <will.deacon@....com>
---
arch/arm64/include/asm/esr.h | 3 ++-
arch/arm64/include/asm/sysreg.h | 30 ++++++++++++++++++++++++++++++
2 files changed, 32 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h
index 8cabd57..f6ebc1f 100644
--- a/arch/arm64/include/asm/esr.h
+++ b/arch/arm64/include/asm/esr.h
@@ -30,7 +30,8 @@
#define ESR_ELx_EC_CP14_LS (0x06)
#define ESR_ELx_EC_FP_ASIMD (0x07)
#define ESR_ELx_EC_CP10_ID (0x08)
-/* Unallocated EC: 0x09 - 0x0B */
+#define ESR_ELx_EC_PAC (0x09)
+/* Unallocated EC: 0x0A - 0x0B */
#define ESR_ELx_EC_CP14_64 (0x0C)
/* Unallocated EC: 0x0d */
#define ESR_ELx_EC_ILL (0x0E)
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 16e44fa..d902cc5 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -164,6 +164,19 @@
#define SYS_TTBR1_EL1 sys_reg(3, 0, 2, 0, 1)
#define SYS_TCR_EL1 sys_reg(3, 0, 2, 0, 2)
+#define SYS_APIAKEYLO_EL1 sys_reg(3, 0, 2, 1, 0)
+#define SYS_APIAKEYHI_EL1 sys_reg(3, 0, 2, 1, 1)
+#define SYS_APIBKEYLO_EL1 sys_reg(3, 0, 2, 1, 2)
+#define SYS_APIBKEYHI_EL1 sys_reg(3, 0, 2, 1, 3)
+
+#define SYS_APDAKEYLO_EL1 sys_reg(3, 0, 2, 2, 0)
+#define SYS_APDAKEYHI_EL1 sys_reg(3, 0, 2, 2, 1)
+#define SYS_APDBKEYLO_EL1 sys_reg(3, 0, 2, 2, 2)
+#define SYS_APDBKEYHI_EL1 sys_reg(3, 0, 2, 2, 3)
+
+#define SYS_APGAKEYLO_EL1 sys_reg(3, 0, 2, 3, 0)
+#define SYS_APGAKEYHI_EL1 sys_reg(3, 0, 2, 3, 1)
+
#define SYS_ICC_PMR_EL1 sys_reg(3, 0, 4, 6, 0)
#define SYS_AFSR0_EL1 sys_reg(3, 0, 5, 1, 0)
@@ -296,7 +309,11 @@
#define SYS_ICH_LR15_EL2 __SYS__LR8_EL2(7)
/* Common SCTLR_ELx flags. */
+#define SCTLR_ELx_ENIA (1 << 31)
+#define SCTLR_ELx_ENIB (1 << 30)
+#define SCTLR_ELx_ENDA (1 << 27)
#define SCTLR_ELx_EE (1 << 25)
+#define SCTLR_ELx_ENDB (1 << 13)
#define SCTLR_ELx_I (1 << 12)
#define SCTLR_ELx_SA (1 << 3)
#define SCTLR_ELx_C (1 << 2)
@@ -326,9 +343,22 @@
#define ID_AA64ISAR0_AES_SHIFT 4
/* id_aa64isar1 */
+#define ID_AA64ISAR1_GPI_SHIFT 28
+#define ID_AA64ISAR1_GPA_SHIFT 24
#define ID_AA64ISAR1_LRCPC_SHIFT 20
#define ID_AA64ISAR1_FCMA_SHIFT 16
#define ID_AA64ISAR1_JSCVT_SHIFT 12
+#define ID_AA64ISAR1_APA_SHIFT 4
+#define ID_AA64ISAR1_API_SHIFT 8
+
+#define ID_AA64ISAR1_APA_NI 0x0
+#define ID_AA64ISAR1_APA_ARCHITECTED 0x1
+#define ID_AA64ISAR1_API_NI 0x0
+#define ID_AA64ISAR1_API_IMP_DEF 0x1
+#define ID_AA64ISAR1_GPA_NI 0x0
+#define ID_AA64ISAR1_GPA_ARCHITECTED 0x1
+#define ID_AA64ISAR1_GPI_NI 0x0
+#define ID_AA64ISAR1_GPI_IMP_DEF 0x1
/* id_aa64pfr0 */
#define ID_AA64PFR0_GIC_SHIFT 24
--
1.9.1
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