From c70ec3491016fe20f867aa982b9a858d7df45256 Mon Sep 17 00:00:00 2001
From: Peter Fang <peter.fang@intel.com>
Date: Mon, 22 Jul 2024 20:58:07 -0700
Subject: [PATCH] platform: tdp: Implement validate_page_range()

On TDP platforms, validate_page_range() means page acceptance. Use the
tdx-tdcall crate for this TDCALL operation.

Signed-off-by: Peter Fang <peter.fang@intel.com>
---
 kernel/src/platform/tdp.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/kernel/src/platform/tdp.rs b/kernel/src/platform/tdp.rs
index a6ed5c9c2..41d3f76a0 100644
--- a/kernel/src/platform/tdp.rs
+++ b/kernel/src/platform/tdp.rs
@@ -16,6 +16,7 @@ use crate::svsm_console::SvsmTdIOPort;
 use crate::types::PageSize;
 use crate::utils::immut_after_init::ImmutAfterInitCell;
 use crate::utils::MemoryRegion;
+use tdx_tdcall::tdx::td_accept_memory;
 
 static CONSOLE_IO: SvsmTdIOPort = SvsmTdIOPort::new();
 static CONSOLE_SERIAL: ImmutAfterInitCell<SerialPort<'_>> = ImmutAfterInitCell::uninit();
@@ -98,10 +99,11 @@ impl SvsmPlatform for TdpPlatform {
 
     fn validate_page_range(
         &self,
-        _region: MemoryRegion<VirtAddr>,
-        _paddr: PhysAddr,
+        region: MemoryRegion<VirtAddr>,
+        paddr: PhysAddr,
     ) -> Result<(), SvsmError> {
-        Err(SvsmError::Tdx)
+        td_accept_memory(paddr.into(), region.len().try_into().unwrap());
+        Ok(())
     }
 
     fn invalidate_page_range(&self, _region: MemoryRegion<VirtAddr>) -> Result<(), SvsmError> {