x86/hyperv/vtl: Mark the wakeup mailbox page as private

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The current code maps MMIO devices as shared (decrypted) by default in a
confidential computing VM.

In a TDX environment, secondary CPUs are booted using the Multiprocessor
Wakeup Structure defined in the ACPI specification. The virtual firmware
and the operating system function in the guest context, without
intervention from the VMM. Map the physical memory of the mailbox as
private. Use the is_private_mmio() callback.

Signed-off-by: Yunhong Jiang <yunhong.jiang@linux.intel.com>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Signed-off-by: Dexuan Cui <dexuan@kernel.org>

...

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Yunhong Jiang 2026-03-04 15:41:20 -08:00 • committed by Dexuan Cui

parent 12584a89c9

commit 8020034119

1 changed files with 17 additions and 0 deletions

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arch/x86/hyperv/hv_vtl.c

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