From: Tianyu Lan <ltykernel@gmail.com>
To: kys@microsoft.com, haiyangz@microsoft.com,
sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com,
luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com,
boris.ostrovsky@oracle.com, jgross@suse.com,
sstabellini@kernel.org, joro@8bytes.org, will@kernel.org,
davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com,
martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de,
m.szyprowski@samsung.com, robin.murphy@arm.com,
thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org,
Tianyu.Lan@microsoft.com, pgonda@google.com,
martin.b.radev@gmail.com, akpm@linux-foundation.org,
kirill.shutemov@linux.intel.com, rppt@kernel.org,
sfr@canb.auug.org.au, saravanand@fb.com,
krish.sadhukhan@oracle.com, aneesh.kumar@linux.ibm.com,
xen-devel@lists.xenproject.org, rientjes@google.com,
hannes@cmpxchg.org, tj@kernel.org,
michael.h.kelley@microsoft.com
Cc: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-scsi@vger.kernel.org, netdev@vger.kernel.org,
vkuznets@redhat.com, parri.andrea@gmail.com,
dave.hansen@intel.com
Subject: [PATCH V3 09/13] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function
Date: Mon, 9 Aug 2021 13:56:13 -0400 [thread overview]
Message-ID: <20210809175620.720923-10-ltykernel@gmail.com> (raw)
In-Reply-To: <20210809175620.720923-1-ltykernel@gmail.com>
From: Tianyu Lan <Tianyu.Lan@microsoft.com>
In Hyper-V Isolation VM with AMD SEV, swiotlb boucne buffer
needs to be mapped into address space above vTOM and so
introduce dma_map_decrypted/dma_unmap_encrypted() to map/unmap
bounce buffer memory. The platform can populate man/unmap callback
in the dma memory decrypted ops.
---
include/linux/dma-map-ops.h | 9 +++++++++
kernel/dma/mapping.c | 22 ++++++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h
index 0d53a96a3d64..01d60a024e45 100644
--- a/include/linux/dma-map-ops.h
+++ b/include/linux/dma-map-ops.h
@@ -71,6 +71,11 @@ struct dma_map_ops {
unsigned long (*get_merge_boundary)(struct device *dev);
};
+struct dma_memory_decrypted_ops {
+ void *(*map)(void *addr, unsigned long size);
+ void (*unmap)(void *addr);
+};
+
#ifdef CONFIG_DMA_OPS
#include <asm/dma-mapping.h>
@@ -374,6 +379,10 @@ static inline void debug_dma_dump_mappings(struct device *dev)
}
#endif /* CONFIG_DMA_API_DEBUG */
+void *dma_map_decrypted(void *addr, unsigned long size);
+int dma_unmap_decrypted(void *addr, unsigned long size);
+
extern const struct dma_map_ops dma_dummy_ops;
+extern struct dma_memory_decrypted_ops dma_memory_generic_decrypted_ops;
#endif /* _LINUX_DMA_MAP_OPS_H */
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 2b06a809d0b9..6fb150dc1750 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -13,11 +13,13 @@
#include <linux/of_device.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+#include <asm/set_memory.h>
#include "debug.h"
#include "direct.h"
bool dma_default_coherent;
+struct dma_memory_decrypted_ops dma_memory_generic_decrypted_ops;
/*
* Managed DMA API
*/
@@ -736,3 +738,23 @@ unsigned long dma_get_merge_boundary(struct device *dev)
return ops->get_merge_boundary(dev);
}
EXPORT_SYMBOL_GPL(dma_get_merge_boundary);
+
+void *dma_map_decrypted(void *addr, unsigned long size)
+{
+ if (set_memory_decrypted((unsigned long)addr,
+ size / PAGE_SIZE))
+ return NULL;
+
+ if (dma_memory_generic_decrypted_ops.map)
+ return dma_memory_generic_decrypted_ops.map(addr, size);
+ else
+ return addr;
+}
+
+int dma_unmap_encrypted(void *addr, unsigned long size)
+{
+ if (dma_memory_generic_decrypted_ops.unmap)
+ dma_memory_generic_decrypted_ops.unmap(addr);
+
+ return set_memory_encrypted((unsigned long)addr, size / PAGE_SIZE);
+}
--
2.25.1
next prev parent reply other threads:[~2021-08-09 17:57 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 17:56 [PATCH V3 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 01/13] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan
2021-08-10 10:56 ` Wei Liu
2021-08-10 12:17 ` Tianyu Lan
2021-08-12 19:14 ` Michael Kelley
2021-08-13 15:46 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 02/13] x86/HV: Initialize shared memory boundary in the " Tianyu Lan
2021-08-12 19:18 ` Michael Kelley
2021-08-14 13:32 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 03/13] x86/HV: Add new hvcall guest address host visibility support Tianyu Lan
2021-08-09 22:12 ` Dave Hansen
2021-08-10 13:09 ` Tianyu Lan
2021-08-10 11:03 ` Wei Liu
2021-08-10 12:25 ` Tianyu Lan
2021-08-12 19:36 ` Michael Kelley
2021-08-12 21:10 ` Michael Kelley
2021-08-09 17:56 ` [PATCH V3 04/13] HV: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-08-12 22:20 ` Michael Kelley
2021-08-15 15:21 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 05/13] HV: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-08-13 19:31 ` Michael Kelley
2021-08-13 20:26 ` Michael Kelley
2021-08-24 8:45 ` Christoph Hellwig
2021-08-09 17:56 ` [PATCH V3 06/13] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-08-13 20:42 ` Michael Kelley
2021-08-09 17:56 ` [PATCH V3 07/13] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-08-13 21:28 ` Michael Kelley
2021-08-09 17:56 ` [PATCH V3 08/13] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-08-16 17:28 ` Michael Kelley
2021-08-17 15:36 ` Tianyu Lan
2021-08-09 17:56 ` Tianyu Lan [this message]
2021-08-12 12:26 ` [PATCH V3 09/13] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function Christoph Hellwig
2021-08-12 15:38 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 10/13] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-08-12 12:27 ` Christoph Hellwig
2021-08-13 17:58 ` Tianyu Lan
2021-08-16 14:50 ` Tianyu Lan
2021-08-19 8:49 ` Christoph Hellwig
2021-08-19 9:59 ` Tianyu Lan
2021-08-19 10:02 ` Christoph Hellwig
2021-08-19 10:03 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 11/13] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-08-19 18:11 ` Michael Kelley
2021-08-20 4:13 ` hch
2021-08-20 9:32 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 12/13] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-08-19 18:14 ` Michael Kelley
2021-08-20 4:21 ` hch
2021-08-20 13:11 ` Tianyu Lan
2021-08-20 13:30 ` Tom Lendacky
2021-08-20 18:20 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 13/13] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-08-19 18:17 ` Michael Kelley
2021-08-20 4:32 ` hch
2021-08-20 15:40 ` Michael Kelley
2021-08-24 8:49 ` min_align_mask " hch
2021-08-20 16:01 ` Tianyu Lan
2021-08-20 15:20 ` Tianyu Lan
2021-08-20 15:37 ` Tianyu Lan
2021-08-20 16:08 ` Michael Kelley
2021-08-20 18:04 ` Tianyu Lan
2021-08-20 19:22 ` Michael Kelley
2021-08-24 8:46 ` hch
2021-08-16 14:55 ` [PATCH V3 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Michael Kelley
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=20210809175620.720923-10-ltykernel@gmail.com \
--to=ltykernel@gmail.com \
--cc=Tianyu.Lan@microsoft.com \
--cc=akpm@linux-foundation.org \
--cc=aneesh.kumar@linux.ibm.com \
--cc=ardb@kernel.org \
--cc=arnd@arndb.de \
--cc=boris.ostrovsky@oracle.com \
--cc=bp@alien8.de \
--cc=brijesh.singh@amd.com \
--cc=dave.hansen@intel.com \
--cc=dave.hansen@linux.intel.com \
--cc=davem@davemloft.net \
--cc=decui@microsoft.com \
--cc=haiyangz@microsoft.com \
--cc=hannes@cmpxchg.org \
--cc=hch@lst.de \
--cc=hpa@zytor.com \
--cc=iommu@lists.linux-foundation.org \
--cc=jejb@linux.ibm.com \
--cc=jgross@suse.com \
--cc=joro@8bytes.org \
--cc=kirill.shutemov@linux.intel.com \
--cc=konrad.wilk@oracle.com \
--cc=krish.sadhukhan@oracle.com \
--cc=kuba@kernel.org \
--cc=kys@microsoft.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-hyperv@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=luto@kernel.org \
--cc=m.szyprowski@samsung.com \
--cc=martin.b.radev@gmail.com \
--cc=martin.petersen@oracle.com \
--cc=michael.h.kelley@microsoft.com \
--cc=mingo@redhat.com \
--cc=netdev@vger.kernel.org \
--cc=parri.andrea@gmail.com \
--cc=peterz@infradead.org \
--cc=pgonda@google.com \
--cc=rientjes@google.com \
--cc=robin.murphy@arm.com \
--cc=rppt@kernel.org \
--cc=saravanand@fb.com \
--cc=sfr@canb.auug.org.au \
--cc=sstabellini@kernel.org \
--cc=sthemmin@microsoft.com \
--cc=tglx@linutronix.de \
--cc=thomas.lendacky@amd.com \
--cc=tj@kernel.org \
--cc=vkuznets@redhat.com \
--cc=wei.liu@kernel.org \
--cc=will@kernel.org \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xenproject.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).