diff mbox series

[v6,10/25] arm64: cpufeature: Export symbol read_sanitised_ftr_reg()

Message ID 20200430143424.2787566-11-jean-philippe@linaro.org (mailing list archive)
State New, archived
Headers show
Series iommu: Shared Virtual Addressing for SMMUv3 | expand

Commit Message

Jean-Philippe Brucker April 30, 2020, 2:34 p.m. UTC 
The SMMUv3 driver would like to read the MMFR0 PARANGE field in order to
share CPU page tables with devices. Allow the driver to be built as
module by exporting the read_sanitized_ftr_reg() cpufeature symbol.

Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
 arch/arm64/kernel/cpufeature.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Suzuki K Poulose April 30, 2020, 3:18 p.m. UTC | #1 
On 04/30/2020 03:34 PM, Jean-Philippe Brucker wrote:
> The SMMUv3 driver would like to read the MMFR0 PARANGE field in order to
> share CPU page tables with devices. Allow the driver to be built as
> module by exporting the read_sanitized_ftr_reg() cpufeature symbol.
> 
> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>

Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>

> ---
>   arch/arm64/kernel/cpufeature.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> index 9fac745aa7bb2..5f6adbf4ae893 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -841,6 +841,7 @@ u64 read_sanitised_ftr_reg(u32 id)
>   	BUG_ON(!regp);
>   	return regp->sys_val;
>   }
> +EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg);
>   
>   #define read_sysreg_case(r)	\
>   	case r:		return read_sysreg_s(r)
>
diff mbox series

Patch

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 9fac745aa7bb2..5f6adbf4ae893 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -841,6 +841,7 @@  u64 read_sanitised_ftr_reg(u32 id)
 	BUG_ON(!regp);
 	return regp->sys_val;
 }
+EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg);
 
 #define read_sysreg_case(r)	\
 	case r:		return read_sysreg_s(r)