[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ℹ️ This is part 3/8 of a series ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: 8eca7f6d5100b6997df4f532090bc3f7e0203bef
WARNING: Author mismatch between patch and found commit: Backport author: Mark Brownbroonie@kernel.org Commit author: Mark Rutlandmark.rutland@arm.com
Status in newer kernel trees: 6.13.y | Present (different SHA1: b52b812b3867)
Note: The patch differs from the upstream commit: --- 1: 8eca7f6d5100b ! 1: af977c6789959 KVM: arm64: Remove host FPSIMD saving for non-protected KVM @@ Commit message Reviewed-by: Oliver Upton oliver.upton@linux.dev Link: https://lore.kernel.org/r/20250210195226.1215254-3-mark.rutland@arm.com Signed-off-by: Marc Zyngier maz@kernel.org + Signed-off-by: Mark Brown broonie@kernel.org
## arch/arm64/include/asm/kvm_host.h ## @@ arch/arm64/include/asm/kvm_host.h: struct kvm_host_data { @@ arch/arm64/kvm/fpsimd.c: void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu) - *host_data_ptr(fpsimd_state) = NULL; - *host_data_ptr(fpmr_ptr) = NULL;
- host_data_clear_flag(HOST_SVE_ENABLED); + vcpu_clear_flag(vcpu, HOST_SVE_ENABLED); if (read_sysreg(cpacr_el1) & CPACR_EL1_ZEN_EL0EN)
## arch/arm64/kvm/hyp/include/hyp/switch.h ## @@ arch/arm64/kvm/hyp/include/hyp/switch.h: static inline void __hyp_sve_save_host( + + /* Re-enable SVE traps if not supported for the guest vcpu. */ + if (!vcpu_has_sve(vcpu)) -+ cpacr_clear_set(CPACR_EL1_ZEN, 0); ++ cpacr_clear_set(CPACR_ELx_ZEN, 0); + + } else { + __fpsimd_save_state(host_data_ptr(host_ctxt.fp_regs)); @@ arch/arm64/kvm/hyp/nvhe/switch.c: static bool kvm_handle_pvm_sys64(struct kvm_vc - - /* Re-enable SVE traps if not supported for the guest vcpu. */ - if (!vcpu_has_sve(vcpu)) -- cpacr_clear_set(CPACR_EL1_ZEN, 0); +- cpacr_clear_set(CPACR_ELx_ZEN, 0); - - } else { - __fpsimd_save_state(*host_data_ptr(fpsimd_state)); ---
NOTE: These results are for this patch alone. Full series testing will be performed when all parts are received.
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.13.y | Success | Success |