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4a530993da
Move _only_ VMXON+VMXOFF and EFER.SVME toggling out of KVM (versus all of VMX and SVM enabling) out of KVM and into the core kernel so that non-KVM TDX enabling, e.g. for trusted I/O, can make SEAMCALLs without needing to ensure KVM is fully loaded. TDX isn't a hypervisor, and isn't trying to be a hypervisor. Specifically, TDX should _never_ have it's own VMCSes (that are visible to the host; the TDX-Module has it's own VMCSes to do SEAMCALL/SEAMRET), and so there is simply no reason to move that functionality out of KVM. With that out of the way, dealing with VMXON/VMXOFF and EFER.SVME is a fairly simple refcounting game. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEKTobbabEP7vbhhN9OlYIJqCjN/0FAmnZJkYACgkQOlYIJqCj N/21chAAjg9tb/E8+vqBZDT5vO9Bu6c333irV2vqBBJZWUx6xKhtk77kL6kISWyf aI57hJ5IwbUkfDcomSY+MyRXxw/X4OioSs5qqvcC2XHatGA8XwifJE47cN5ZT0+D hzZjru8Z9VGHf5wUXS41yTHtm+INiEYMgJiseUQR6sbWx3H+zDcLIooNQx/ZLYrV vR+VPtaMYpJ0TTDDqb8PrCnjgXoXFenAnzAj9bAikWP60kaDXrxN9KPc5woDo29+ TrkTyr2mmQvKpNhLCDwAMNa9bXxgzkHEGx8J2WZTbUi9ZBv4MwVsnGLLsaUKQlaa 4V1JDiICzYptjMzU+ka4iTF+m0KEz4EykP7mVVK+5MAHc0NOUVfDW6JP2PM/66dh NyyjGhbrfH0PwqzDn4N2h0MmWT4YNCIxESClecEMtEzsCyWfYOMitxbDbzHnu9Vw a/C0pwWKJ34Trr0O79SevAWJBlu596mya0YvMeCAWxCvSUGknbo5IXdrmtp6htGp Gz5+0ZyvVRbYpwxS+OOpWMkZuPvvEcWTbMAG/scbSHh80P/uCVyuLsRZR2HSB8EV tYnnLDDDQ1KmLV7xmw5XnkN9hFffAM8eXA7KX9TPjCXjd25lCJGgquQEH0oAHe5q 1qXf+lWttP7MIbD5/Ga5CO+FqXAE6xmFRWjEBgLx32kSAWXqxPs= =SuxR -----END PGP SIGNATURE----- Merge tag 'kvm-x86-vmxon-7.1' of https://github.com/kvm-x86/linux into HEAD KVM x86 VMXON and EFER.SVME extraction for 7.1 Move _only_ VMXON+VMXOFF and EFER.SVME toggling out of KVM (versus all of VMX and SVM enabling) out of KVM and into the core kernel so that non-KVM TDX enabling, e.g. for trusted I/O, can make SEAMCALLs without needing to ensure KVM is fully loaded. TIO isn't a hypervisor, and isn't trying to be a hypervisor. Specifically, TIO should _never_ have it's own VMCSes (that are visible to the host; the TDX-Module has it's own VMCSes to do SEAMCALL/SEAMRET), and so there is simply no reason to move that functionality out of KVM. With that out of the way, dealing with VMXON/VMXOFF and EFER.SVME is a fairly simple refcounting game. |
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