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| author | Sean Christopherson <seanjc@google.com> | 2021-04-21 19:11:13 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-04-26 05:27:14 -0400 |
| commit | fa13680f5668cff05302a2f4753c49334a83a064 (patch) | |
| tree | 094187e6be72a137ca5c1c3b3b4daa3de55afc72 /arch/x86/boot/mkcpustr.c | |
| parent | f31b88b35f90f6b7ae4abc1015494a285f459221 (diff) | |
| download | linux-fa13680f5668cff05302a2f4753c49334a83a064.tar.gz linux-fa13680f5668cff05302a2f4753c49334a83a064.tar.bz2 linux-fa13680f5668cff05302a2f4753c49334a83a064.zip | |
KVM: SVM: Disable SEV/SEV-ES if NPT is disabled
Disable SEV and SEV-ES if NPT is disabled. While the APM doesn't clearly
state that NPT is mandatory, it's alluded to by:
The guest page tables, managed by the guest, may mark data memory pages
as either private or shared, thus allowing selected pages to be shared
outside the guest.
And practically speaking, shadow paging can't work since KVM can't read
the guest's page tables.
Fixes: e9df09428996 ("KVM: SVM: Add sev module_param")
Cc: Brijesh Singh <brijesh.singh@amd.com
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210422021125.3417167-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/boot/mkcpustr.c')
0 files changed, 0 insertions, 0 deletions