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Re: [Xen-devel] [PATCH 15/15] xen: tools: expose EPC in ACPI table

On 09/07/17 10:16, Kai Huang wrote:
On physical machine EPC is exposed in ACPI table via "INT0E0C". Although EPC
can be discovered by CPUID but Windows driver requires EPC to be exposed in
ACPI table as well. This patch exposes EPC in ACPI table.


diff --git a/tools/libacpi/dsdt.asl b/tools/libacpi/dsdt.asl
index fa8ff317b2..25ce196028 100644
--- a/tools/libacpi/dsdt.asl
+++ b/tools/libacpi/dsdt.asl
@@ -441,6 +441,55 @@ DefinitionBlock ("DSDT.aml", "DSDT", 2, "Xen", "HVM", 0)
+        Device (EPC)

Would it not be better to put this into an SSDT, and only expose it to the guest if SGX is advertised?


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