openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

Do not unroll string I/O for SEV-ES guests because they support it. 

-----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmAqT+UACgkQEsHwGGHe
 VUr1hQ//d4lgbpkXAq17f/43kMZK5GJKMocdBZw+6QmUr4TYWS2PPTfXEr4FCjM1
 NqxR2wo97bjbg0oHZOd0JzjxzhC6fHXwiyyFGRv3sS7WNfVPlJRZ47dNa1qPxuZX
 QjFwjtWtR2YzKue5Xq7O87gf2YEWFgojWRd5cCyqNU2a0SAHSOhNij8vSswXaBZA
 tD2ApIlce1de4HJxXXFBN9xAows7EqKH4OTqRld66aUqDsUfLQCdPB0aKqnTpItA
 pzW6TRM392K97j2jvMjEJsHcRUVdsYvE8ICz36vk2vmpP1V3stPxOW8lfC4JV5dL
 NXmhuol+CzW/3FeyW5wTtmhJRj3I5MvPl3ddf30Ex9tXSx1RT/7VU7p/zDcv81WZ
 32bQFYnPeNI0SHXH+CW7p13GWDE+yTBCUy838Olmkx69K+2OBgt5B6W2BcOkiKPN
 RH1NAkwxhjP53eR7CIjirvKK77/p/48/Jg2TyLVWKHcdr7QPZdFG0+FpYbQ2nKoj
 q2Gy7l/uxTciu7/RTRHM3E/STVqEmrWSjIuy+dhTOJaHqjMXPyiWXWdYgH2QymUX
 pkTi72uaHy5HF0DyOo5pONkJrODUBasr1iJxUKuWkR++wLJihxN5+lbTxd9Vvcop
 KN5HNhLoyyQ8jYuc8OLwoHIDEskJgMqLDfNx9sLqCXfR380FfAc=
 =anHE
 -----END PGP SIGNATURE-----

Merge tag 'x86_seves_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 SEV-ES fix from Borislav Petkov:
 "Do not unroll string I/O for SEV-ES guests because they support it"

* tag 'x86_seves_for_v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sev-es: Do not unroll string I/O for SEV-ES guests
This commit is contained in:
Linus Torvalds 2021-02-20 19:16:02 -08:00
parent 4bf0b820d1 62a08a7193
commit b9cdab6820
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/mm/mem_encrypt.c
View File

@ -475,9 +475,10 @@ void __init mem_encrypt_init(void)
swiotlb_update_mem_attributes();
/*
* With SEV, we need to unroll the rep string I/O instructions.
* With SEV, we need to unroll the rep string I/O instructions,
* but SEV-ES supports them through the #VC handler.
*/
if (sev_active())
if (sev_active() && !sev_es_active())
static_branch_enable(&sev_enable_key);
print_mem_encrypt_feature_info();