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8d20bd6381
Define pr_fmt using KBUILD_MODNAME for all KVM x86 code so that printks use consistent formatting across common x86, Intel, and AMD code. In addition to providing consistent print formatting, using KBUILD_MODNAME, e.g. kvm_amd and kvm_intel, allows referencing SVM and VMX (and SEV and SGX and ...) as technologies without generating weird messages, and without causing naming conflicts with other kernel code, e.g. "SEV: ", "tdx: ", "sgx: " etc.. are all used by the kernel for non-KVM subsystems. Opportunistically move away from printk() for prints that need to be modified anyways, e.g. to drop a manual "kvm: " prefix. Opportunistically convert a few SGX WARNs that are similarly modified to WARN_ONCE; in the very unlikely event that the WARNs fire, odds are good that they would fire repeatedly and spam the kernel log without providing unique information in each print. Note, defining pr_fmt yields undesirable results for code that uses KVM's printk wrappers, e.g. vcpu_unimpl(). But, that's a pre-existing problem as SVM/kvm_amd already defines a pr_fmt, and thankfully use of KVM's wrappers is relatively limited in KVM x86 code. Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Paul Durrant <paul@xen.org> Message-Id: <20221130230934.1014142-35-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
42 lines
958 B
C
42 lines
958 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* KVM L1 hypervisor optimizations on Hyper-V for SVM.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kvm_host.h>
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#include <asm/mshyperv.h>
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#include "svm.h"
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#include "svm_ops.h"
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#include "hyperv.h"
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#include "kvm_onhyperv.h"
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#include "svm_onhyperv.h"
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int svm_hv_enable_l2_tlb_flush(struct kvm_vcpu *vcpu)
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{
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struct hv_vmcb_enlightenments *hve;
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struct hv_partition_assist_pg **p_hv_pa_pg =
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&to_kvm_hv(vcpu->kvm)->hv_pa_pg;
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if (!*p_hv_pa_pg)
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*p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL);
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if (!*p_hv_pa_pg)
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return -ENOMEM;
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hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments;
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hve->partition_assist_page = __pa(*p_hv_pa_pg);
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hve->hv_vm_id = (unsigned long)vcpu->kvm;
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if (!hve->hv_enlightenments_control.nested_flush_hypercall) {
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hve->hv_enlightenments_control.nested_flush_hypercall = 1;
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vmcb_mark_dirty(to_svm(vcpu)->vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
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}
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return 0;
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}
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