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authorCatalin Marinas <catalin.marinas@arm.com>2014-07-25 16:03:22 +0400
committerCatalin Marinas <catalin.marinas@arm.com>2014-07-25 16:03:22 +0400
commitecb3c2bbf233d0c8d6e48009afa52c45c0204857 (patch)
tree40749c2a0d71e6ad89a9664eec01842543e3ba53 /arch/arm64
parent05ac65305437e8ef63d2d19cac704138a2a05aa5 (diff)
parent021f653791ad17e03f98aaa7fb933816ae16f161 (diff)
downloadlinux-ecb3c2bbf233d0c8d6e48009afa52c45c0204857.tar.xz
Merge tag 'deps-irqchip-gic-3.17' of git://git.infradead.org/users/jcooper/linux
* tag 'deps-irqchip-gic-3.17' of git://git.infradead.org/users/jcooper/linux: irqchip: gic-v3: Initial support for GICv3 irqchip: gic: Move some bits of GICv2 to a library-type file Conflicts: arch/arm64/Kconfig
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/Kconfig1
-rw-r--r--arch/arm64/kernel/head.S18
-rw-r--r--arch/arm64/kernel/hyp-stub.S1
3 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index f4615ba88a77..bfd60fa9d6d5 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -10,6 +10,7 @@ config ARM64
select ARM_ARCH_TIMER
select ARM_GIC
select AUDIT_ARCH_COMPAT_GENERIC
+ select ARM_GIC_V3
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
select COMMON_CLK
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 0bce493495e9..c99e3a879ebc 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -22,6 +22,7 @@
#include <linux/linkage.h>
#include <linux/init.h>
+#include <linux/irqchip/arm-gic-v3.h>
#include <asm/assembler.h>
#include <asm/ptrace.h>
@@ -289,6 +290,23 @@ CPU_LE( bic x0, x0, #(3 << 24) ) // Clear the EE and E0E bits for EL1
msr cnthctl_el2, x0
msr cntvoff_el2, xzr // Clear virtual offset
+#ifdef CONFIG_ARM_GIC_V3
+ /* GICv3 system register access */
+ mrs x0, id_aa64pfr0_el1
+ ubfx x0, x0, #24, #4
+ cmp x0, #1
+ b.ne 3f
+
+ mrs x0, ICC_SRE_EL2
+ orr x0, x0, #ICC_SRE_EL2_SRE // Set ICC_SRE_EL2.SRE==1
+ orr x0, x0, #ICC_SRE_EL2_ENABLE // Set ICC_SRE_EL2.Enable==1
+ msr ICC_SRE_EL2, x0
+ isb // Make sure SRE is now set
+ msr ICH_HCR_EL2, xzr // Reset ICC_HCR_EL2 to defaults
+
+3:
+#endif
+
/* Populate ID registers. */
mrs x0, midr_el1
mrs x1, mpidr_el1
diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S
index 0959611d9ff1..a272f335c289 100644
--- a/arch/arm64/kernel/hyp-stub.S
+++ b/arch/arm64/kernel/hyp-stub.S
@@ -19,6 +19,7 @@
#include <linux/init.h>
#include <linux/linkage.h>
+#include <linux/irqchip/arm-gic-v3.h>
#include <asm/assembler.h>
#include <asm/ptrace.h>