tools headers UAPI: Sync kvm header with the kernel sources

JIRA: https://issues.redhat.com/browse/RHEL-47242

commit 8fc50be
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
Date:   Thu Jun 12 11:31:41 2025 -0300

    tools headers UAPI: Sync kvm header with the kernel sources

    To pick the changes in:

      c9c1e20 ("KVM: x86: Introduce Intel specific quirk KVM_X86_QUIRK_IGNORE_GUEST_PAT")
      012426d ("KVM: TDX: Finalize VM initialization")
      c846b45 ("KVM: TDX: Add an ioctl to create initial guest memory")
      488808e ("KVM: x86: Introduce KVM_TDX_GET_CPUID")
      a50f673 ("KVM: TDX: Do TDX specific vcpu initialization")
      0186dd2 ("KVM: TDX: add ioctl to initialize VM with TDX specific parameters")
      61bb282 ("KVM: TDX: Get system-wide info about TDX module on initialization")
      b2aaf38 ("KVM: TDX: Add place holder for TDX VM specific mem_enc_op ioctl")

    This addresses these perf build warnings:

      Warning: Kernel ABI header differences:
        diff -u tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h

    Please see tools/include/uapi/README for further details.

    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Ian Rogers <irogers@google.com>
    Cc: Isaku Yamahata <isaku.yamahata@intel.com>
    Cc: James Clark <james.clark@linaro.org>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Kan Liang <kan.liang@linux.intel.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Paolo Bonzini <pbonzini@redhat.com>
    Cc: Xiaoyao Li <xiaoyao.li@intel.com>
    Cc: Yan Zhao <yan.y.zhao@intel.com>
    Link: https://lore.kernel.org/r/aErqLPktXIzGyS-m@x1
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>

Author: Maxim Levitsky

tools/arch/x86/include/uapi/asm/kvm.h

@@ -441,6 +441,7 @@ struct kvm_sync_regs {
 #define KVM_X86_QUIRK_MWAIT_NEVER_UD_FAULTS	(1 << 6)
 #define KVM_X86_QUIRK_SLOT_ZAP_ALL		(1 << 7)
 #define KVM_X86_QUIRK_STUFF_FEATURE_MSRS	(1 << 8)
+#define KVM_X86_QUIRK_IGNORE_GUEST_PAT		(1 << 9)
 
 #define KVM_STATE_NESTED_FORMAT_VMX	0
 #define KVM_STATE_NESTED_FORMAT_SVM	1
@@ -930,4 +931,74 @@ struct kvm_hyperv_eventfd {
 #define KVM_X86_SNP_VM		4
 #define KVM_X86_TDX_VM		5
 
+/* Trust Domain eXtension sub-ioctl() commands. */
+enum kvm_tdx_cmd_id {
+	KVM_TDX_CAPABILITIES = 0,
+	KVM_TDX_INIT_VM,
+	KVM_TDX_INIT_VCPU,
+	KVM_TDX_INIT_MEM_REGION,
+	KVM_TDX_FINALIZE_VM,
+	KVM_TDX_GET_CPUID,
+
+	KVM_TDX_CMD_NR_MAX,
+};
+
+struct kvm_tdx_cmd {
+	/* enum kvm_tdx_cmd_id */
+	__u32 id;
+	/* flags for sub-commend. If sub-command doesn't use this, set zero. */
+	__u32 flags;
+	/*
+	 * data for each sub-command. An immediate or a pointer to the actual
+	 * data in process virtual address.  If sub-command doesn't use it,
+	 * set zero.
+	 */
+	__u64 data;
+	/*
+	 * Auxiliary error code.  The sub-command may return TDX SEAMCALL
+	 * status code in addition to -Exxx.
+	 */
+	__u64 hw_error;
+};
+
+struct kvm_tdx_capabilities {
+	__u64 supported_attrs;
+	__u64 supported_xfam;
+	__u64 reserved[254];
+
+	/* Configurable CPUID bits for userspace */
+	struct kvm_cpuid2 cpuid;
+};
+
+struct kvm_tdx_init_vm {
+	__u64 attributes;
+	__u64 xfam;
+	__u64 mrconfigid[6];	/* sha384 digest */
+	__u64 mrowner[6];	/* sha384 digest */
+	__u64 mrownerconfig[6];	/* sha384 digest */
+
+	/* The total space for TD_PARAMS before the CPUIDs is 256 bytes */
+	__u64 reserved[12];
+
+	/*
+	 * Call KVM_TDX_INIT_VM before vcpu creation, thus before
+	 * KVM_SET_CPUID2.
+	 * This configuration supersedes KVM_SET_CPUID2s for VCPUs because the
+	 * TDX module directly virtualizes those CPUIDs without VMM.  The user
+	 * space VMM, e.g. qemu, should make KVM_SET_CPUID2 consistent with
+	 * those values.  If it doesn't, KVM may have wrong idea of vCPUIDs of
+	 * the guest, and KVM may wrongly emulate CPUIDs or MSRs that the TDX
+	 * module doesn't virtualize.
+	 */
+	struct kvm_cpuid2 cpuid;
+};
+
+#define KVM_TDX_MEASURE_MEMORY_REGION   _BITULL(0)
+
+struct kvm_tdx_init_mem_region {
+	__u64 source_addr;
+	__u64 gpa;
+	__u64 nr_pages;
+};
+
 #endif /* _ASM_X86_KVM_H */