Memory Management:

impl SecureMemoryManager {
    pub fn secure_allocate_with_capability(
        &mut self,
        size: NonZeroUsize,
        alignment: NonZeroUsize,
        capability: &MemoryCapability,
        security_context: &SecurityContext,
    ) -> Result<SecureMemoryRegion, MemoryAllocationError> {
        // Verify capability permits allocation
        self.capability_verifier.verify_allocation_capability(
            capability, size, alignment, security_context
        )?;
        
        // Physical memory allocation
        let physical_region = self.physical_allocator
            .allocate_with_strategy(size, alignment)?;
        
        // Virtual memory mapping with security
        let virtual_mapping = self.virtual_allocator
            .create_secure_mapping(physical_region, security_context)?;
        
        // Hardware memory encryption
        let encryption_handle = if security_context.requires_encryption() {
            Some(self.memory_encryption.enable_region_encryption(
                virtual_mapping.virtual_address(), size, security_context.key()
            )?)
        } else { None };
        
        Ok(SecureMemoryRegion {
            virtual_mapping,
            physical_region,
            encryption_handle,
            capability: capability.clone(),
            allocation_timestamp: precise_timestamp(),
        })
    }
}