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KVM: SVM: Force sev_es_host_save_area() to be inlined (for noinstr usage)

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Force sev_es_host_save_area() to be always inlined, as it's used in the
low level VM-Enter/VM-Exit path, which is non-instrumentable.

  vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0xb0: call to
    sev_es_host_save_area() leaves .noinstr.text section
  vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0xbf: call to
    sev_es_host_save_area.isra.0() leaves .noinstr.text section

Fixes: c92be2fd8e ("KVM: SVM: Save/restore non-volatile GPRs in SEV-ES VMRUN via host save area")
Reported-by: Borislav Petkov <bp@alien8.de>
Tested-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240617210432.1642542-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2024-06-17 14:04:30 -07:00
parent 99a49093ce
commit 34830b3c02
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/svm/svm.c
+1 -1
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@@ -1495,7 +1495,7 @@ static void svm_vcpu_free(struct kvm_vcpu *vcpu)
__free_pages(virt_to_page(svm->msrpm), get_order(MSRPM_SIZE));
}
static struct sev_es_save_area *sev_es_host_save_area(struct svm_cpu_data *sd)
static __always_inline struct sev_es_save_area *sev_es_host_save_area(struct svm_cpu_data *sd)
{
return page_address(sd->save_area) + 0x400;
}