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[PATCH v5 20/26] i386: acpi: Add SGX EPC entry to ACPI tables
From: |
Paolo Bonzini |
Subject: |
[PATCH v5 20/26] i386: acpi: Add SGX EPC entry to ACPI tables |
Date: |
Fri, 24 Sep 2021 13:25:03 +0200 |
From: Sean Christopherson <sean.j.christopherson@intel.com>
The ACPI Device entry for SGX EPC is essentially a hack whose primary
purpose is to provide software with a way to autoprobe SGX support,
e.g. to allow software to implement SGX support as a driver. Details
on the individual EPC sections are not enumerated through ACPI tables,
i.e. software must enumerate the EPC sections via CPUID. Furthermore,
software expects to see only a single EPC Device in the ACPI tables
regardless of the number of EPC sections in the system.
However, several versions of Windows do rely on the ACPI tables to
enumerate the address and size of the EPC. So, regardless of the number
of EPC sections exposed to the guest, create exactly *one* EPC device
with a _CRS entry that spans the entirety of all EPC sections (which are
guaranteed to be contiguous in Qemu).
Note, NUMA support for EPC memory is intentionally not considered as
enumerating EPC NUMA information is not yet defined for bare metal.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-20-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
hw/i386/acpi-build.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index dfaa47cdc2..f4d6ae3d02 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1841,6 +1841,28 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
}
#endif
+ if (pcms->sgx_epc.size != 0) {
+ uint64_t epc_base = pcms->sgx_epc.base;
+ uint64_t epc_size = pcms->sgx_epc.size;
+
+ dev = aml_device("EPC");
+ aml_append(dev, aml_name_decl("_HID", aml_eisaid("INT0E0C")));
+ aml_append(dev, aml_name_decl("_STR",
+ aml_unicode("Enclave Page Cache 1.0")));
+ crs = aml_resource_template();
+ aml_append(crs,
+ aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED,
+ AML_MAX_FIXED, AML_NON_CACHEABLE,
+ AML_READ_WRITE, 0, epc_base,
+ epc_base + epc_size - 1, 0, epc_size));
+ aml_append(dev, aml_name_decl("_CRS", crs));
+
+ method = aml_method("_STA", 0, AML_NOTSERIALIZED);
+ aml_append(method, aml_return(aml_int(0x0f)));
+ aml_append(dev, method);
+
+ aml_append(sb_scope, dev);
+ }
aml_append(dsdt, sb_scope);
/* copy AML table into ACPI tables blob and patch header there */
--
2.31.1
- [PATCH v5 15/26] i386: Propagate SGX CPUID sub-leafs to KVM, (continued)
- [PATCH v5 15/26] i386: Propagate SGX CPUID sub-leafs to KVM, Paolo Bonzini, 2021/09/24
- [PATCH v5 05/26] i386: Add 'sgx-epc' device to expose EPC sections to guest, Paolo Bonzini, 2021/09/24
- [PATCH v5 16/26] Adjust min CPUID level to 0x12 when SGX is enabled, Paolo Bonzini, 2021/09/24
- [PATCH v5 18/26] hw/i386/pc: Account for SGX EPC sections when calculating device memory, Paolo Bonzini, 2021/09/24
- [PATCH v5 11/26] i386: Add get/set/migrate support for SGX_LEPUBKEYHASH MSRs, Paolo Bonzini, 2021/09/24
- [PATCH v5 03/26] hostmem: Add hostmem-epc as a backend for SGX EPC, Paolo Bonzini, 2021/09/24
- [PATCH v5 07/26] i386: Add primary SGX CPUID and MSR defines, Paolo Bonzini, 2021/09/24
- [PATCH v5 08/26] i386: Add SGX CPUID leaf FEAT_SGX_12_0_EAX, Paolo Bonzini, 2021/09/24
- [PATCH v5 14/26] i386: kvm: Add support for exposing PROVISIONKEY to guest, Paolo Bonzini, 2021/09/24
- [PATCH v5 17/26] hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly, Paolo Bonzini, 2021/09/24
- [PATCH v5 20/26] i386: acpi: Add SGX EPC entry to ACPI tables,
Paolo Bonzini <=
- [PATCH v5 21/26] q35: Add support for SGX EPC, Paolo Bonzini, 2021/09/24
- [PATCH v5 19/26] i386/pc: Add e820 entry for SGX EPC section(s), Paolo Bonzini, 2021/09/24
- [PATCH v5 22/26] i440fx: Add support for SGX EPC, Paolo Bonzini, 2021/09/24
- [PATCH v5 26/26] target/i386: Add the query-sgx-capabilities QMP command, Paolo Bonzini, 2021/09/24
- [PATCH v5 24/26] docs/system: Add SGX documentation to the system manual, Paolo Bonzini, 2021/09/24
- [PATCH v5 25/26] target/i386: Add HMP and QMP interfaces for SGX, Paolo Bonzini, 2021/09/24
- [PATCH v5 23/26] sgx-epc: Add the fill_device_info() callback support, Paolo Bonzini, 2021/09/24