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| author | Yang Zhong <yang.zhong@intel.com> | 2021-11-01 12:20:09 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-11-10 22:57:40 +0100 |
| commit | 2c3132279b9a962c27adaea53b4c8e8480385706 (patch) | |
| tree | 26b93682da34ce418950d80e112776fac80ca9d4 /include/hw/intc | |
| parent | bd989ed44f847cba20b46a743770c152e188f365 (diff) | |
| download | focaccia-qemu-2c3132279b9a962c27adaea53b4c8e8480385706.tar.gz focaccia-qemu-2c3132279b9a962c27adaea53b4c8e8480385706.zip | |
sgx: Reset the vEPC regions during VM reboot
For bare-metal SGX on real hardware, the hardware provides guarantees SGX state at reboot. For instance, all pages start out uninitialized. The vepc driver provides a similar guarantee today for freshly-opened vepc instances, but guests such as Windows expect all pages to be in uninitialized state on startup, including after every guest reboot. Qemu can invoke the ioctl to bring its vEPC pages back to uninitialized state. There is a possibility that some pages fail to be removed if they are SECS pages, and the child and SECS pages could be in separate vEPC regions. Therefore, the ioctl returns the number of EREMOVE failures, telling Qemu to try the ioctl again after it's done with all vEPC regions. The related kernel patches: Link: https://lkml.kernel.org/r/20211021201155.1523989-3-pbonzini@redhat.com Signed-off-by: Yang Zhong <yang.zhong@intel.com> Message-Id: <20211101162009.62161-6-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/hw/intc')
0 files changed, 0 insertions, 0 deletions