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[ Upstream commit bc3d7c5570a03ab45bde4bae83697c80900fb714 ] Currently if an SEV-ES VM shuts down userspace sees KVM_RUN struct with only errno=EINVAL. This is a very limited amount of information to debug the situation. Instead return KVM_EXIT_SHUTDOWN to alert userspace the VM is shutting down and is not usable any further. Signed-off-by: Peter Gonda <pgonda@google.com> Suggested-by: Sean Christopherson <seanjc@google.com> Suggested-by: Tom Lendacky <thomas.lendacky@amd.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Borislav Petkov <bp@alien8.de> Cc: x86@kernel.org Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Link: https://lore.kernel.org/r/20230907162449.1739785-1-pgonda@google.com [sean: tweak changelog] Signed-off-by: Sean Christopherson <seanjc@google.com> Stable-dep-of: a2620f8932fa ("KVM: SVM: Forcibly leave SMM mode on SHUTDOWN interception") Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.