From: Thiago Jung Bauermann <bauerman@linux.ibm.com>
To: x86@kernel.org
Cc: iommu@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>, Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
Thomas Lendacky <Thomas.Lendacky@amd.com>,
Halil Pasic <pasic@linux.ibm.com>,
Mike Anderson <andmike@linux.ibm.com>,
Ram Pai <linuxram@us.ibm.com>,
Thiago Jung Bauermann <bauerman@linux.ibm.com>
Subject: [PATCH v3 3/6] dma-mapping: Remove dma_check_mask()
Date: Thu, 18 Jul 2019 00:28:55 -0300 [thread overview]
Message-ID: <20190718032858.28744-4-bauerman@linux.ibm.com> (raw)
In-Reply-To: <20190718032858.28744-1-bauerman@linux.ibm.com>
sme_active() is an x86-specific function so it's better not to call it from
generic code. Christoph Hellwig mentioned that "There is no reason why we
should have a special debug printk just for one specific reason why there
is a requirement for a large DMA mask.", so just remove dma_check_mask().
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
---
kernel/dma/mapping.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 1f628e7ac709..61eeefbfcb36 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -291,12 +291,6 @@ void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
}
EXPORT_SYMBOL(dma_free_attrs);
-static inline void dma_check_mask(struct device *dev, u64 mask)
-{
- if (sme_active() && (mask < (((u64)sme_get_me_mask() << 1) - 1)))
- dev_warn(dev, "SME is active, device will require DMA bounce buffers\n");
-}
-
int dma_supported(struct device *dev, u64 mask)
{
const struct dma_map_ops *ops = get_dma_ops(dev);
@@ -327,7 +321,6 @@ int dma_set_mask(struct device *dev, u64 mask)
return -EIO;
arch_dma_set_mask(dev, mask);
- dma_check_mask(dev, mask);
*dev->dma_mask = mask;
return 0;
}
@@ -345,7 +338,6 @@ int dma_set_coherent_mask(struct device *dev, u64 mask)
if (!dma_supported(dev, mask))
return -EIO;
- dma_check_mask(dev, mask);
dev->coherent_dma_mask = mask;
return 0;
}
next prev parent reply other threads:[~2019-07-18 3:29 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-18 3:28 [PATCH v3 0/6] Remove x86-specific code from generic headers Thiago Jung Bauermann
2019-07-18 3:28 ` [PATCH v3 1/6] x86,s390: Move ARCH_HAS_MEM_ENCRYPT definition to arch/Kconfig Thiago Jung Bauermann
2019-07-18 3:28 ` [PATCH v3 2/6] swiotlb: Remove call to sme_active() Thiago Jung Bauermann
2019-07-18 8:42 ` Christoph Hellwig
2019-07-18 17:26 ` Lendacky, Thomas
2019-07-18 3:28 ` Thiago Jung Bauermann [this message]
2019-07-18 8:42 ` [PATCH v3 3/6] dma-mapping: Remove dma_check_mask() Christoph Hellwig
2019-07-18 17:29 ` Lendacky, Thomas
2019-07-18 3:28 ` [PATCH v3 4/6] x86,s390/mm: Move sme_active() and sme_me_mask to x86-specific header Thiago Jung Bauermann
2019-07-18 8:42 ` Christoph Hellwig
2019-07-18 17:42 ` Lendacky, Thomas
2019-07-18 17:56 ` Christoph Hellwig
2019-07-18 3:28 ` [PATCH v3 5/6] fs/core/vmcore: Move sev_active() reference to x86 arch code Thiago Jung Bauermann
2019-07-18 8:44 ` Christoph Hellwig
2019-07-18 17:47 ` Lendacky, Thomas
2019-07-19 4:59 ` lijiang
2019-07-19 15:47 ` Thiago Jung Bauermann
2019-07-18 3:28 ` [PATCH v3 6/6] s390/mm: Remove sev_active() function Thiago Jung Bauermann
2019-07-18 8:44 ` Christoph Hellwig
2019-07-18 13:01 ` Halil Pasic
2019-07-18 16:43 ` Thiago Jung Bauermann
2019-07-18 16:41 ` Thiago Jung Bauermann
2019-07-18 17:48 ` [PATCH v3 0/6] Remove x86-specific code from generic headers Lendacky, Thomas
2019-07-18 19:44 ` Thiago Jung Bauermann
2019-07-19 13:12 ` Lendacky, Thomas
2019-07-19 15:45 ` Thiago Jung Bauermann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190718032858.28744-4-bauerman@linux.ibm.com \
--to=bauerman@linux.ibm.com \
--cc=Thomas.Lendacky@amd.com \
--cc=adobriyan@gmail.com \
--cc=andmike@linux.ibm.com \
--cc=bp@alien8.de \
--cc=hch@lst.de \
--cc=hpa@zytor.com \
--cc=iommu@lists.linux-foundation.org \
--cc=konrad.wilk@oracle.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=linuxram@us.ibm.com \
--cc=m.szyprowski@samsung.com \
--cc=mingo@redhat.com \
--cc=pasic@linux.ibm.com \
--cc=robin.murphy@arm.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).