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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/x86/kvm/svm/svm_onhyperv.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/kvm/svm/svm_onhyperv.c')
-rw-r--r-- | arch/x86/kvm/svm/svm_onhyperv.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm/svm_onhyperv.c b/arch/x86/kvm/svm/svm_onhyperv.c new file mode 100644 index 0000000000..7af8422d33 --- /dev/null +++ b/arch/x86/kvm/svm/svm_onhyperv.c @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * KVM L1 hypervisor optimizations on Hyper-V for SVM. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kvm_host.h> + +#include <asm/mshyperv.h> + +#include "svm.h" +#include "svm_ops.h" + +#include "hyperv.h" +#include "kvm_onhyperv.h" +#include "svm_onhyperv.h" + +int svm_hv_enable_l2_tlb_flush(struct kvm_vcpu *vcpu) +{ + struct hv_vmcb_enlightenments *hve; + struct hv_partition_assist_pg **p_hv_pa_pg = + &to_kvm_hv(vcpu->kvm)->hv_pa_pg; + + if (!*p_hv_pa_pg) + *p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL); + + if (!*p_hv_pa_pg) + return -ENOMEM; + + hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments; + + hve->partition_assist_page = __pa(*p_hv_pa_pg); + hve->hv_vm_id = (unsigned long)vcpu->kvm; + if (!hve->hv_enlightenments_control.nested_flush_hypercall) { + hve->hv_enlightenments_control.nested_flush_hypercall = 1; + vmcb_mark_dirty(to_svm(vcpu)->vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS); + } + + return 0; +} + |