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[PATCH v4 19/33] i386: acpi: Add SGX EPC entry to ACPI tables
From: |
Yang Zhong |
Subject: |
[PATCH v4 19/33] i386: acpi: Add SGX EPC entry to ACPI tables |
Date: |
Mon, 19 Jul 2021 19:21:22 +0800 |
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>
---
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 17836149fe..efebe640ce 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -1829,6 +1829,28 @@ 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 */
- [PATCH v4 09/33] i386: Add SGX CPUID leaf FEAT_SGX_12_1_EAX, (continued)
- [PATCH v4 09/33] i386: Add SGX CPUID leaf FEAT_SGX_12_1_EAX, Yang Zhong, 2021/07/19
- [PATCH v4 10/33] i386: Add get/set/migrate support for SGX_LEPUBKEYHASH MSRs, Yang Zhong, 2021/07/19
- [PATCH v4 11/33] i386: Add feature control MSR dependency when SGX is enabled, Yang Zhong, 2021/07/19
- [PATCH v4 12/33] i386: Update SGX CPUID info according to hardware/KVM/user input, Yang Zhong, 2021/07/19
- [PATCH v4 13/33] i386: kvm: Add support for exposing PROVISIONKEY to guest, Yang Zhong, 2021/07/19
- [PATCH v4 14/33] i386: Propagate SGX CPUID sub-leafs to KVM, Yang Zhong, 2021/07/19
- [PATCH v4 15/33] Adjust min CPUID level to 0x12 when SGX is enabled, Yang Zhong, 2021/07/19
- [PATCH v4 16/33] hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly, Yang Zhong, 2021/07/19
- [PATCH v4 17/33] hw/i386/pc: Account for SGX EPC sections when calculating device memory, Yang Zhong, 2021/07/19
- [PATCH v4 18/33] i386/pc: Add e820 entry for SGX EPC section(s), Yang Zhong, 2021/07/19
- [PATCH v4 19/33] i386: acpi: Add SGX EPC entry to ACPI tables,
Yang Zhong <=
- [PATCH v4 20/33] q35: Add support for SGX EPC, Yang Zhong, 2021/07/19
- [PATCH v4 21/33] i440fx: Add support for SGX EPC, Yang Zhong, 2021/07/19
- [PATCH v4 22/33] hostmem-epc: Add the reset interface for EPC backend reset, Yang Zhong, 2021/07/19
- [PATCH v4 23/33] sgx-epc: Add the reset interface for sgx-epc virt device, Yang Zhong, 2021/07/19
- [PATCH v4 24/33] sgx-epc: Avoid bios reset during sgx epc initialization, Yang Zhong, 2021/07/19
- [PATCH v4 25/33] hostmem-epc: Make prealloc consistent with qemu cmdline during reset, Yang Zhong, 2021/07/19
- [PATCH v4 26/33] qmp: Add query-sgx command, Yang Zhong, 2021/07/19
- [PATCH v4 27/33] hmp: Add 'info sgx' command, Yang Zhong, 2021/07/19
- [PATCH v4 28/33] i386: Add sgx_get_info() interface, Yang Zhong, 2021/07/19
- [PATCH v4 29/33] bitops: Support 32 and 64 bit mask macro, Yang Zhong, 2021/07/19