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| author |   Brijesh Singh <brijesh.singh@amd.com> | 2017-10-20 09:30:57 -0500 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2017-11-07 15:35:59 +0100 |
| commit | ac26963a1175c813e3ed21c0d2435b083173136e (patch) | |
| tree | 0142c85cd9037d5d790a10d78588409558f26b96 /.gitattributes | |
| parent | x86: Add support for changing memory encryption attribute in early boot (diff) | |
| download | linux-dev-ac26963a1175c813e3ed21c0d2435b083173136e.tar.xz linux-dev-ac26963a1175c813e3ed21c0d2435b083173136e.zip | |
percpu: Introduce DEFINE_PER_CPU_DECRYPTED
KVM guest defines three per-CPU variables (steal-time, apf_reason, and
kvm_pic_eoi) which are shared between a guest and a hypervisor.
When SEV is active, memory is encrypted with a guest-specific key, and if
the guest OS wants to share the memory region with the hypervisor then it
must clear the C-bit (i.e set decrypted) before sharing it.
DEFINE_PER_CPU_DECRYPTED can be used to define the per-CPU variables
which will be shared between a guest and a hypervisor.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Borislav Petkov <bp@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: linux-arch@vger.kernel.org
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: kvm@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christoph Lameter <cl@linux.com>
Link: https://lkml.kernel.org/r/20171020143059.3291-16-brijesh.singh@amd.com
Diffstat (limited to '.gitattributes')
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