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From: Christoph Hellwig <hch@lst.de>
To: Stefan Wahren <wahrenst@gmx.net>
Cc: iommu@lists.linux-foundation.org,
	Robin Murphy <robin.murphy@arm.com>,
	Christoph Hellwig <hch@lst.de>,
	linux-arm-kernel@lists.infradead.org,
	Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: Build regression in Linux 5.3-rc5 with CONFIG_XEN=y
Date: Tue, 20 Aug 2019 03:24:15 +0200	[thread overview]
Message-ID: <20190820012415.GA21178@lst.de> (raw)
In-Reply-To: <0b019cdc-6f0e-c37f-2be7-c24293acb8cd@gmx.net>

Hi Stefan,

please try the patch below.

---
From e0570628d96faa50ebfc94ce8e545968336db225 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 20 Aug 2019 10:08:38 +0900
Subject: arm: select the dma-noncoherent symbols for all swiotlb builds

We need to provide the arch hooks for non-coherent dma-direct
and swiotlb for all swiotlb builds, not just when LPAS is enabled.
Without that the Xen build that selects SWIOTLB indirectly through
SWIOTLB_XEN fails to build.

Fixes: ad3c7b18c5b3 ("arm: use swiotlb for bounce buffering on LPAE configs")
Reported-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 arch/arm/Kconfig    | 4 ++++
 arch/arm/mm/Kconfig | 4 ----
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 33b00579beff..24360211534a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -7,6 +7,8 @@ config ARM
 	select ARCH_HAS_BINFMT_FLAT
 	select ARCH_HAS_DEBUG_VIRTUAL if MMU
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
+	select ARCH_HAS_DMA_COHERENT_TO_PFN if SWIOTLB
+	select ARCH_HAS_DMA_MMAP_PGPROT if SWIOTLB
 	select ARCH_HAS_ELF_RANDOMIZE
 	select ARCH_HAS_FORTIFY_SOURCE
 	select ARCH_HAS_KEEPINITRD
@@ -18,6 +20,8 @@ config ARM
 	select ARCH_HAS_SET_MEMORY
 	select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
 	select ARCH_HAS_STRICT_MODULE_RWX if MMU
+	select ARCH_HAS_SYNC_DMA_FOR_DEVICE if SWIOTLB
+	select ARCH_HAS_SYNC_DMA_FOR_CPU if SWIOTLB
 	select ARCH_HAS_TEARDOWN_DMA_OPS if MMU
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 	select ARCH_HAVE_CUSTOM_GPIO_H
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index c54cd7ed90ba..c1222c0e9fd3 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -664,10 +664,6 @@ config ARM_LPAE
 		!CPU_32v4 && !CPU_32v3
 	select PHYS_ADDR_T_64BIT
 	select SWIOTLB
-	select ARCH_HAS_DMA_COHERENT_TO_PFN
-	select ARCH_HAS_DMA_MMAP_PGPROT
-	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
-	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	help
 	  Say Y if you have an ARMv7 processor supporting the LPAE page
 	  table format and you would like to access memory beyond the
-- 
2.20.1


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  reply	other threads:[~2019-08-20  1:24 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-19 18:37 Build regression in Linux 5.3-rc5 with CONFIG_XEN=y Stefan Wahren
2019-08-19 19:02 ` Robin Murphy
2019-08-19 19:12   ` Stefan Wahren
2019-08-20  1:24     ` Christoph Hellwig [this message]
2019-08-20  5:43       ` Stefan Wahren
2019-08-20  5:46         ` Christoph Hellwig
2019-08-21  5:55         ` Stefan Wahren
2019-08-21  5:56       ` Stefan Wahren

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