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From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org
Cc: joro@8bytes.org, catalin.marinas@arm.com, will@kernel.org,
	robin.murphy@arm.com, baolu.lu@linux.intel.com,
	Jonathan.Cameron@huawei.com, jacob.jun.pan@linux.intel.com,
	zhangfei.gao@linaro.org, xuzaibo@huawei.com,
	zhengxiang9@huawei.com, fenghua.yu@intel.com, hch@infradead.org,
	Jean-Philippe Brucker <jean-philippe@linaro.org>,
	Suzuki K Poulose <suzuki.poulose@arm.com>
Subject: [PATCH v8 06/12] arm64: cpufeature: Export symbol read_sanitised_ftr_reg()
Date: Thu, 18 Jun 2020 17:51:19 +0200	[thread overview]
Message-ID: <20200618155125.1548969-7-jean-philippe@linaro.org> (raw)
In-Reply-To: <20200618155125.1548969-1-jean-philippe@linaro.org>

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.

Acked-by: 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(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 4ae41670c2e6b..ba1e17ad17447 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1068,6 +1068,7 @@ u64 read_sanitised_ftr_reg(u32 id)
 		return 0;
 	return regp->sys_val;
 }
+EXPORT_SYMBOL_GPL(read_sanitised_ftr_reg);
 
 #define read_sysreg_case(r)	\
 	case r:		return read_sysreg_s(r)
-- 
2.27.0



  parent reply	other threads:[~2020-06-18 15:52 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-18 15:51 [PATCH v8 00/12] iommu: Shared Virtual Addressing for SMMUv3 (PT sharing part) Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 01/12] mm: Define pasid in mm Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 02/12] iommu/ioasid: Add ioasid references Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 03/12] iommu/sva: Add PASID helpers Jean-Philippe Brucker
2020-06-19  7:37   ` Lu Baolu
2020-06-18 15:51 ` [PATCH v8 04/12] arm64: mm: Pin down ASIDs for sharing mm with devices Jean-Philippe Brucker
2020-07-13 15:46   ` Will Deacon
2020-07-16 15:44     ` Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 05/12] iommu/io-pgtable-arm: Move some definitions to a header Jean-Philippe Brucker
2020-06-18 15:51 ` Jean-Philippe Brucker [this message]
2020-06-18 15:51 ` [PATCH v8 07/12] iommu/arm-smmu-v3: Share process page tables Jean-Philippe Brucker
2020-07-13 20:22   ` Will Deacon
2020-07-16 15:45     ` Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 08/12] iommu/arm-smmu-v3: Seize private ASID Jean-Philippe Brucker
2020-07-06 12:40   ` Xiang Zheng
2020-07-06 16:07     ` Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 09/12] iommu/arm-smmu-v3: Check for SVA features Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 10/12] iommu/arm-smmu-v3: Add SVA device feature Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 11/12] iommu/arm-smmu-v3: Implement iommu_sva_bind/unbind() Jean-Philippe Brucker
2020-06-18 15:51 ` [PATCH v8 12/12] iommu/arm-smmu-v3: Hook up ATC invalidation to mm ops Jean-Philippe Brucker
2020-07-09  9:39 ` [PATCH v8 00/12] iommu: Shared Virtual Addressing for SMMUv3 (PT sharing part) Jean-Philippe Brucker
2020-07-20 11:11 ` Will Deacon
2020-07-20 15:39   ` Jean-Philippe Brucker

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