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authorGravatar Tianyu Lan <Tianyu.Lan@microsoft.com> 2021-10-25 08:21:14 -0400
committerGravatar Wei Liu <wei.liu@kernel.org> 2021-10-28 11:26:36 +0000
commit9a8797722e4239242d0cb4cc4baa805df6ac979e (patch)
tree8cb351e1b1c93971e0eb1910ca9f9ed34151e16e /drivers/hv/Kconfig
parentDrivers: hv: vmbus: Add SNP support for VMbus channel initiate message (diff)
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Drivers: hv: vmbus: Initialize VMbus ring buffer for Isolation VM
VMbus ring buffer are shared with host and it's need to be accessed via extra address space of Isolation VM with AMD SNP support. This patch is to map the ring buffer address in extra address space via vmap_pfn(). Hyperv set memory host visibility hvcall smears data in the ring buffer and so reset the ring buffer memory to zero after mapping. Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Link: https://lore.kernel.org/r/20211025122116.264793-10-ltykernel@gmail.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv/Kconfig')
-rw-r--r--drivers/hv/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index d1123ceb38f3..dd12af20e467 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -8,6 +8,7 @@ config HYPERV
|| (ARM64 && !CPU_BIG_ENDIAN))
select PARAVIRT
select X86_HV_CALLBACK_VECTOR if X86
+ select VMAP_PFN
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