- Expand the KVM_PRE_FAULT_MEMORY selftest to add a regression test for the
bug fixed by commit 3ccbf6f470 ("KVM: x86/mmu: Return -EAGAIN if userspace
deletes/moves memslot during prefault")
- Don't try to get PMU capabbilities from perf when running a CPU with hybrid
CPUs/PMUs, as perf will rightly WARN.
- Rework KVM_CAP_GUEST_MEMFD_MMAP (newly introduced in 6.18) into a more
generic KVM_CAP_GUEST_MEMFD_FLAGS
- Add a guest_memfd INIT_SHARED flag and require userspace to explicitly set
said flag to initialize memory as SHARED, irrespective of MMAP. The
behavior merged in 6.18 is that enabling mmap() implicitly initializes
memory as SHARED, which would result in an ABI collision for x86 CoCo VMs
as their memory is currently always initialized PRIVATE.
- Allow mmap() on guest_memfd for x86 CoCo VMs, i.e. on VMs with private
memory, to enable testing such setups, i.e. to hopefully flush out any
other lurking ABI issues before 6.18 is officially released.
- Add testcases to the guest_memfd selftest to cover guest_memfd without MMAP,
and host userspace accesses to mmap()'d private memory.
-----BEGIN PGP SIGNATURE-----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=lBtj
-----END PGP SIGNATURE-----
Merge tag 'kvm-x86-fixes-6.18-rc2' of https://github.com/kvm-x86/linux into HEAD
KVM x86 fixes for 6.18:
- Expand the KVM_PRE_FAULT_MEMORY selftest to add a regression test for the
bug fixed by commit 3ccbf6f470 ("KVM: x86/mmu: Return -EAGAIN if userspace
deletes/moves memslot during prefault")
- Don't try to get PMU capabbilities from perf when running a CPU with hybrid
CPUs/PMUs, as perf will rightly WARN.
- Rework KVM_CAP_GUEST_MEMFD_MMAP (newly introduced in 6.18) into a more
generic KVM_CAP_GUEST_MEMFD_FLAGS
- Add a guest_memfd INIT_SHARED flag and require userspace to explicitly set
said flag to initialize memory as SHARED, irrespective of MMAP. The
behavior merged in 6.18 is that enabling mmap() implicitly initializes
memory as SHARED, which would result in an ABI collision for x86 CoCo VMs
as their memory is currently always initialized PRIVATE.
- Allow mmap() on guest_memfd for x86 CoCo VMs, i.e. on VMs with private
memory, to enable testing such setups, i.e. to hopefully flush out any
other lurking ABI issues before 6.18 is officially released.
- Add testcases to the guest_memfd selftest to cover guest_memfd without MMAP,
and host userspace accesses to mmap()'d private memory.
