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| author | Borislav Petkov <bp@suse.de> | 2021-10-01 22:41:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:17:21 +0300 |
| commit | 6c087b0fbfe9da991552c258190b4f1e3975db93 (patch) | |
| tree | 9cd5331f25ac1531e09af8c5f1c27585c5def184 /lib/string_helpers.c | |
| parent | 411d939db1d05be79f29cdeef87b1f9a46a54121 (diff) | |
| download | linux-6c087b0fbfe9da991552c258190b4f1e3975db93.tar.xz | |
x86/sev: Make the #VC exception stacks part of the default stacks storage
commit 541ac97186d9ea88491961a46284de3603c914fd upstream.
The size of the exception stacks was increased by the commit in Fixes,
resulting in stack sizes greater than a page in size. The #VC exception
handling was only mapping the first (bottom) page, resulting in an
SEV-ES guest failing to boot.
Make the #VC exception stacks part of the default exception stacks
storage and allocate them with a CONFIG_AMD_MEM_ENCRYPT=y .config. Map
them only when a SEV-ES guest has been detected.
Rip out the custom VC stacks mapping and storage code.
[ bp: Steal and adapt Tom's commit message. ]
Fixes: 7fae4c24a2b8 ("x86: Increase exception stack sizes")
Signed-off-by: Borislav Petkov <bp@suse.de>
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Tested-by: Brijesh Singh <brijesh.singh@amd.com>
Link: https://lkml.kernel.org/r/YVt1IMjIs7pIZTRR@zn.tnic
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/string_helpers.c')
0 files changed, 0 insertions, 0 deletions