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| author | Fuad Tabba <tabba@google.com> | 2024-06-03 15:28:48 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2024-06-04 17:06:33 +0300 |
| commit | b5b9955617bc0b41546f2fa7c3dbcc048b43dc82 (patch) | |
| tree | 034e4b9879c431dda19c38e0dad0e2e1443dabd5 /arch/arm64/kvm/hyp/nvhe/pkvm.c | |
| parent | 66d5b53e20a6e00b7ce3b652a3e2db967f7b33d0 (diff) | |
| download | linux-b5b9955617bc0b41546f2fa7c3dbcc048b43dc82.tar.xz | |
KVM: arm64: Eagerly restore host fpsimd/sve state in pKVM
When running in protected mode we don't want to leak protected
guest state to the host, including whether a guest has used
fpsimd/sve. Therefore, eagerly restore the host state on guest
exit when running in protected mode, which happens only if the
guest has used fpsimd/sve.
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Fuad Tabba <tabba@google.com>
Link: https://lore.kernel.org/r/20240603122852.3923848-7-tabba@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/kvm/hyp/nvhe/pkvm.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/pkvm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c index 25e9a94f6d76..feb27b4ce459 100644 --- a/arch/arm64/kvm/hyp/nvhe/pkvm.c +++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c @@ -588,6 +588,8 @@ unlock: if (ret) unmap_donated_memory(hyp_vcpu, sizeof(*hyp_vcpu)); + hyp_vcpu->vcpu.arch.cptr_el2 = kvm_get_reset_cptr_el2(&hyp_vcpu->vcpu); + return ret; } |