[PATCH v4 18/33] i386/pc: Add e820 entry for SGX EPC section(s)

[Yang Zhong]

From: Sean Christopherson <sean.j.christopherson@intel.com>

Note that SGX EPC is currently guaranteed to reside in a single
contiguous chunk of memory regardless of the number of EPC sections.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
---
 hw/i386/pc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 109e835890..80d3b5e62d 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -890,6 +890,10 @@ void pc_memory_init(PCMachineState *pcms,
         e820_add_entry(0x100000000ULL, x86ms->above_4g_mem_size, E820_RAM);
     }
 
+    if (pcms->sgx_epc.size != 0) {
+        e820_add_entry(pcms->sgx_epc.base, pcms->sgx_epc.size, E820_RESERVED);
+    }
+
     if (!pcmc->has_reserved_memory &&
         (machine->ram_slots ||
          (machine->maxram_size > machine->ram_size))) {