Issue

Description of problem: Ice lake host has a 2*64G epc sections, but boot a guest with 30GB sgx epc section failed. Guest boots failed in the early stage with Tianocore icon. Version-Release number of selected component (if applicable): kernel-5.14.0-130.el9.x86_64 qemu-kvm-7.0.0-8.el9.x86_64 How reproducible: 100% Steps to Reproduce: 1. Check host epc sections: ./test-sgx ... CPUID Leaf 12H, Sub-Leaf 2 of Intel SGX Capabilities (EAX=12H,ECX=2) eax: 18000001 ebx: 10 ecx: e7800002 edx: f size of EPC section in Processor Reserved Memory, 65144 M CPUID Leaf 12H, Sub-Leaf 3 of Intel SGX Capabilities (EAX=12H,ECX=3) eax: 18000001 ebx: 30 ecx: e8000002 edx: f size of EPC section in Processor Reserved Memory, 65152 M ... dmesg|grep -i sgx [ 10.054125] sgx: EPC section 0x1018000000-0x1fff7fffff [ 10.164986] sgx: EPC section 0x3018000000-0x3fffffffff 2. Boot a guest with 30 GB epc sections ... -machine q35,sgx-epc.0.memdev=mem-epc0,sgx-epc.0.node=0,pflash0=drive_ovmf_code,pflash1=drive_ovmf_vars \ -cpu host,+kvm_pv_unhalt \ -m 40960 \ -object memory-backend-epc,size=22960M,prealloc=true,id=mem-epc0 \ -object memory-backend-ram,size=40960M,id=mem-mem0 \ -smp 16,maxcpus=16,cores=4,threads=2,dies=1,sockets=2 \ -numa node,memdev=mem-mem0,cpus=0-15 \ ... 3. hmp info sgx: (qemu) info sgx SGX support: enabled SGX1 support: enabled SGX2 support: enabled FLC support: enabled size: 24075304960 NUMA node #0: size=24075304960 Actual results: Guest boots failed in the early stage with Tianocore icon Expected results: Guest boots successfully Additional info: Boots a guest with 20GB epc section successfully. If setting BIOS with 2*2G epc section, guest with 4G epc sections will boot successfully

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