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| author |   Erdem Aktas <erdemaktas@google.com> | 2019-12-13 13:31:46 -0800 |
|---|---|---|
| committer |   Dennis Zhou <dennis@kernel.org> | 2020-01-31 11:15:59 -0800 |
| commit | 264b0d2bee148073c117e7bbbde5be7125a53be1 (patch) | |
| tree | 2fd998ca682d902969b5c25f2aafd43ca6dbf652 /include/linux/percpu-defs.h | |
| parent | percpu: fix __percpu annotation in asm-generic (diff) | |
| download | linux-dev-264b0d2bee148073c117e7bbbde5be7125a53be1.tar.xz linux-dev-264b0d2bee148073c117e7bbbde5be7125a53be1.zip | |
percpu: Separate decrypted varaibles anytime encryption can be enabled
CONFIG_VIRTUALIZATION may not be enabled for memory encrypted guests. If
disabled, decrypted per-CPU variables may end up sharing the same page
with variables that should be left encrypted.
Always separate per-CPU variables that should be decrypted into their own
page anytime memory encryption can be enabled in the guest rather than
rely on any other config option that may not be enabled.
Fixes: ac26963a1175 ("percpu: Introduce DEFINE_PER_CPU_DECRYPTED")
Cc: stable@vger.kernel.org # 4.15+
Signed-off-by: Erdem Aktas <erdemaktas@google.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/percpu-defs.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h index a6fabd865211..176bfbd52d97 100644 --- a/include/linux/percpu-defs.h +++ b/include/linux/percpu-defs.h @@ -175,8 +175,7 @@ * Declaration/definition used for per-CPU variables that should be accessed * as decrypted when memory encryption is enabled in the guest. */ -#if defined(CONFIG_VIRTUALIZATION) && defined(CONFIG_AMD_MEM_ENCRYPT) - +#ifdef CONFIG_AMD_MEM_ENCRYPT #define DECLARE_PER_CPU_DECRYPTED(type, name) \ DECLARE_PER_CPU_SECTION(type, name, "..decrypted") |