diff options
| author | Michael Kelley <mikelley@microsoft.com> | 2023-03-26 15:51:58 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-03-27 08:46:43 +0200 |
| commit | d33ddc92db8a61416473ff3d7f1c621c50733dc0 (patch) | |
| tree | 7f8576ed7407b86b82cfaba26e667d3bcc947b86 /drivers/hv/ring_buffer.c | |
| parent | x86/hyperv: Reorder code to facilitate future work (diff) | |
| download | linux-d33ddc92db8a61416473ff3d7f1c621c50733dc0.tar.xz linux-d33ddc92db8a61416473ff3d7f1c621c50733dc0.zip | |
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/ring_buffer.c')
| -rw-r--r-- | drivers/hv/ring_buffer.c | 2 |
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) |