[v4] Qemu SGX virtualization

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

Yang Zhong posted 33 patches 4 years, 6 months ago

Diff against v1 v1 v2 v3 v5
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Maintainers: Eduardo Habkost <ehabkost@redhat.com>, Thomas Huth <thuth@redhat.com>, Peter Xu <peterx@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, David Hildenbrand <david@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Eric Blake <eblake@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Alex Williamson <alex.williamson@redhat.com>, Ani Sinha <ani@anisinha.ca>, Markus Armbruster <armbru@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Laurent Vivier <lvivier@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Marcelo Tosatti <mtosatti@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>

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

Posted by Yang Zhong 4 years, 6 months ago

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))) {