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This hypercall is used by the SEV guest to notify a change in the page encryption status to the hypervisor. The hypercall should be invoked only when the encryption attribute is changed from encrypted -> decrypted and vice versa. By default all guest pages are considered encrypted. The hypercall exits to userspace to manage the guest shared regions and integrate with the userspace VMM's migration code. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Borislav Petkov <bp@suse.de> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: x86@kernel.org Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Steve Rutherford <srutherford@google.com> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Signed-off-by: Ashish Kalra <ashish.kalra@amd.com> Co-developed-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Co-developed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <90778988e1ee01926ff9cac447aacb745f954c8c.1623174621.git.ashish.kalra@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
39 lines
1,016 B
C
39 lines
1,016 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI__LINUX_KVM_PARA_H
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#define _UAPI__LINUX_KVM_PARA_H
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/*
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* This header file provides a method for making a hypercall to the host
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* Architectures should define:
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* - kvm_hypercall0, kvm_hypercall1...
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* - kvm_arch_para_features
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* - kvm_para_available
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*/
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/* Return values for hypercalls */
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#define KVM_ENOSYS 1000
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#define KVM_EFAULT EFAULT
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#define KVM_EINVAL EINVAL
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#define KVM_E2BIG E2BIG
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#define KVM_EPERM EPERM
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#define KVM_EOPNOTSUPP 95
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#define KVM_HC_VAPIC_POLL_IRQ 1
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#define KVM_HC_MMU_OP 2
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#define KVM_HC_FEATURES 3
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#define KVM_HC_PPC_MAP_MAGIC_PAGE 4
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#define KVM_HC_KICK_CPU 5
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#define KVM_HC_MIPS_GET_CLOCK_FREQ 6
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#define KVM_HC_MIPS_EXIT_VM 7
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#define KVM_HC_MIPS_CONSOLE_OUTPUT 8
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#define KVM_HC_CLOCK_PAIRING 9
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#define KVM_HC_SEND_IPI 10
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#define KVM_HC_SCHED_YIELD 11
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#define KVM_HC_MAP_GPA_RANGE 12
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/*
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* hypercalls use architecture specific
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*/
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#include <asm/kvm_para.h>
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#endif /* _UAPI__LINUX_KVM_PARA_H */
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