diff options
| author | Marc Zyngier <maz@kernel.org> | 2024-08-20 14:17:58 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2024-08-27 07:59:27 +0100 |
| commit | ef3be86021c3bdf384c36d9d4aa1ee9fe65b95af (patch) | |
| tree | 8c138860a4c6038f873ef7e454e34ecc0dbdff34 /arch/arm64/kvm/fpsimd.c | |
| parent | 7d9c1ed6f4bfa8d5fcafad847ac64e2839a04301 (diff) | |
KVM: arm64: Add save/restore support for FPMR
Just like the rest of the FP/SIMD state, FPMR needs to be context
switched.
The only interesting thing here is that we need to treat the pKVM
part a bit differently, as the host FP state is never written back
to the vcpu thread, but instead stored locally and eagerly restored.
Reviewed-by: Mark Brown <broonie@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20240820131802.3547589-5-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/kvm/fpsimd.c')
| -rw-r--r-- | arch/arm64/kvm/fpsimd.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/kvm/fpsimd.c b/arch/arm64/kvm/fpsimd.c index 4cb8ad5d69a8..ea5484ce1f3b 100644 --- a/arch/arm64/kvm/fpsimd.c +++ b/arch/arm64/kvm/fpsimd.c @@ -63,6 +63,7 @@ void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu) */ *host_data_ptr(fp_owner) = FP_STATE_HOST_OWNED; *host_data_ptr(fpsimd_state) = kern_hyp_va(¤t->thread.uw.fpsimd_state); + *host_data_ptr(fpmr_ptr) = kern_hyp_va(¤t->thread.uw.fpmr); vcpu_clear_flag(vcpu, HOST_SVE_ENABLED); if (read_sysreg(cpacr_el1) & CPACR_EL1_ZEN_EL0EN) |