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authorMichael Kelley <mikelley@microsoft.com>2023-03-26 06:51:58 -0700
committerBorislav Petkov (AMD) <bp@alien8.de>2023-03-27 08:46:43 +0200
commitd33ddc92db8a61416473ff3d7f1c621c50733dc0 (patch)
tree7f8576ed7407b86b82cfaba26e667d3bcc947b86 /drivers/hv
parent71290be18f2deeae013482bf79cd526df61fcfcd (diff)
Drivers: hv: Explicitly request decrypted in vmap_pfn() calls
Update vmap_pfn() calls to explicitly request that the mapping be for decrypted access to the memory. There's no change in functionality since the PFNs passed to vmap_pfn() are above the shared_gpa_boundary, implicitly producing a decrypted mapping. But explicitly requesting "decrypted" allows the code to work before and after changes that cause vmap_pfn() to mask the PFNs to being below the shared_gpa_boundary. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Link: https://lore.kernel.org/r/1679838727-87310-4-git-send-email-mikelley@microsoft.com
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/ring_buffer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index c6692fd5ab15..2111e97c3b63 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -211,7 +211,7 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
ring_info->ring_buffer = (struct hv_ring_buffer *)
vmap_pfn(pfns_wraparound, page_cnt * 2 - 1,
- PAGE_KERNEL);
+ pgprot_decrypted(PAGE_KERNEL));
kfree(pfns_wraparound);
if (!ring_info->ring_buffer)