i386: Add support for Intel SGX

[Qemu-devel] [RFC PATCH 17/20] i386/pc: Add e820 entry for SGX EPC section(s)

Sean Christopherson posted 20 patches 6 years, 1 month ago

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Maintainers: Eric Blake <eblake@redhat.com>, Cornelia Huck <cohuck@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Richard Henderson <rth@twiddle.net>, Igor Mammedov <imammedo@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Markus Armbruster <armbru@redhat.com>

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[Qemu-devel] [RFC PATCH 17/20] i386/pc: Add e820 entry for SGX EPC section(s)

Posted by Sean Christopherson 6 years, 1 month ago

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>
---
 hw/i386/pc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 614d464394..1b555e46f3 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1850,6 +1850,9 @@ void pc_memory_init(PCMachineState *pcms,
                                     ram_above_4g);
         e820_add_entry(0x100000000ULL, pcms->above_4g_mem_size, E820_RAM);
     }
+    if (pcms->sgx_epc != NULL) {
+        e820_add_entry(pcms->sgx_epc->base, pcms->sgx_epc->size, E820_RESERVED);
+    }
 
     if (!pcmc->has_reserved_memory &&
         (machine->ram_slots ||
-- 
2.22.0