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| author | Ram Pai <linuxram@us.ibm.com> | 2020-07-27 21:07:15 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2020-07-28 05:34:52 +0300 |
| commit | 2027a24a75ce32cf48a22cc25a9d87b8c5b19328 (patch) | |
| tree | d9fd20bd150c3e4cc05fb581b4792bee2e92d78a /Documentation/powerpc/ultravisor.rst | |
| parent | 48908a3833cc76c56e626e8e80ba8f808c8d03a5 (diff) | |
| download | linux-2027a24a75ce32cf48a22cc25a9d87b8c5b19328.tar.xz | |
KVM: PPC: Book3S HV: Disable page merging in H_SVM_INIT_START
Page-merging of pages in memory-slots associated with a Secure VM
is disabled in H_SVM_PAGE_IN handler.
This operation should have been done the much earlier; the moment the VM
is initiated for secure-transition. Delaying this operation increases
the probability for those pages to acquire new references, making it
impossible to migrate those pages in H_SVM_PAGE_IN handler.
Disable page-migration in H_SVM_INIT_START handling.
Reviewed-by: Bharata B Rao <bharata@linux.ibm.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'Documentation/powerpc/ultravisor.rst')
| -rw-r--r-- | Documentation/powerpc/ultravisor.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/powerpc/ultravisor.rst b/Documentation/powerpc/ultravisor.rst index df136c8f91fa..a1c8c37159a1 100644 --- a/Documentation/powerpc/ultravisor.rst +++ b/Documentation/powerpc/ultravisor.rst @@ -895,6 +895,7 @@ Return values One of the following values: * H_SUCCESS on success. + * H_STATE if the VM is not in a position to switch to secure. Description ~~~~~~~~~~~ |