Fix e820_alloc_memory() may overlap hypervisor memory #8739
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The hypervisor image size is determined at link time, but now it is calculated and stored in a global variable during mmu initialization, and the helper function reads from that variable. Change to calculate it inside helper function to avoid inconsistency. Tracked-On: projectacrn#8738 Signed-off-by: Jiaqing Zhao <[email protected]> Reviewed-by: Fei Li <[email protected]>
Mark hypervisor memory region as unusable in its e820 table to avoid being overlapped by e820_alloc_memory(). As it is already filtered out in hypervisor e820 table, there is no longer need to filter it out in service VM e820. Tracked-On: projectacrn#8738 Signed-off-by: Jiaqing Zhao <[email protected]> Reviewed-by: Fei Li <[email protected]>
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e820_alloc_memory() finds a usable area in hypervisor e820 table, but
currently hypervisor memory range is also marked as usable. Mark it as
unusable to avoid corrupting hypervisor.