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| author | Christoffer Dall <christoffer.dall@linaro.org> | 2014-07-11 04:54:14 -0700 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2014-07-11 04:54:14 -0700 |
| commit | 179c1e3cd9fd1e7569712fd968b2d98802208bc0 (patch) | |
| tree | e699f65c5558afb1c7705c3b18d4ba69a35bc472 /arch/arm64 | |
| parent | 1df08ba0aa95f1a8832b7162eec51069bd9be7ae (diff) | |
| parent | 021f653791ad17e03f98aaa7fb933816ae16f161 (diff) | |
| download | linux-179c1e3cd9fd1e7569712fd968b2d98802208bc0.tar.gz linux-179c1e3cd9fd1e7569712fd968b2d98802208bc0.tar.bz2 linux-179c1e3cd9fd1e7569712fd968b2d98802208bc0.zip | |
Merge tag 'deps-irqchip-gic-3.17' of git://git.infradead.org/users/jcooper/linux.git
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm64/kernel/head.S | 18 | ||||
| -rw-r--r-- | arch/arm64/kernel/hyp-stub.S | 1 |
3 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 7295419165e1..be52492c2291 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -9,6 +9,7 @@ config ARM64 select ARM_AMBA select ARM_ARCH_TIMER select ARM_GIC + 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 a96d3a6a63f6..96623502519c 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> @@ -296,6 +297,23 @@ 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> |