On Tue, May 28, 2024 at 01:09:19PM +0300, Kirill A. Shutemov wrote:

Currently, attempting to perform MMIO from userspace in a TDX guest
leads to a warning about an unexpected #VE and SIGSEGV being delivered
to the process.

Enlightened userspace may choose to handle MMIO on their own if the
kernel does not emulate it.

Handle the EPT_VIOLATION exit reason for userspace and deliver SIGBUS
instead of SIGSEGV. SIGBUS is more appropriate for the MMIO situation.

Signed-off-by: Kirill A. Shutemov <redacted>

Any feedback?

-- 
  Kiryl Shutsemau / Kirill A. Shutemov