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From: Oliver Upton To: Sean Christopherson Cc: Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Jones , Anup Patel , Atish Patra , Christian Borntraeger , Janosch Frank , Claudio Imbrenda Subject: Re: [PATCH 3/5] KVM: selftests: Remove unnecessary register shuffling in fix_hypercall_test Message-ID: References: <20220908233134.3523339-1-seanjc@google.com> <20220908233134.3523339-4-seanjc@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220908233134.3523339-4-seanjc@google.com> X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 08, 2022 at 11:31:32PM +0000, Sean Christopherson wrote: > Use input constraints to load RAX and RBX when testing that KVM correctly > does/doesn't patch the "wrong" hypercall. There's no need to manually > load RAX and RBX, and no reason to clobber them either (KVM is not > supposed to modify anything other than RAX). Too much time on 'the other architecture' where we don't have input constraints to load named registers per-se :) > Signed-off-by: Sean Christopherson Reviewed-by: Oliver Upton -- Thanks, Oliver