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target/i386: Add SGX aex-notify and EDECCSSA support 

The new SGX Asynchronous Exit (AEX) notification mechanism (AEX-notify)
allows one enclave to receive a notification in the ERESUME after the
enclave exit due to an AEX.  EDECCSSA is a new SGX user leaf function
(ENCLU[EDECCSSA]) to facilitate the AEX notification handling.

Whether the hardware supports to create enclave with AEX-notify support
is enumerated via CPUID.(EAX=0x12,ECX=0x1):EAX[10].  The new EDECCSSA
user leaf function is enumerated via CPUID.(EAX=0x12,ECX=0x0):EAX[11].

Add support to allow to expose the new SGX AEX-notify feature and the
new EDECCSSA user leaf function to KVM guest.

Link: https://lore.kernel.org/lkml/166760360549.4906.809756297092548496.tip-bot2@tip-bot2/
Link: https://lore.kernel.org/lkml/166760360934.4906.2427175408052308969.tip-bot2@tip-bot2/
Reviewed-by: Yang Zhong <yang.zhong@linux.intel.com>
Signed-off-by: Kai Huang <kai.huang@intel.com>
Message-Id: <20221109024834.172705-1-kai.huang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Kai Huang 2022-11-09 15:48:34 +13:00 committed by Paolo Bonzini
parent 6f9f630836
commit d45f24fe75
1 changed files with 2 additions and 2 deletions
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4
target/i386/cpu.c
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@ -1233,7 +1233,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.feat_names = {
"sgx1", "sgx2", NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, "sgx-edeccssa",
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
@ -1273,7 +1273,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.feat_names = {
NULL, "sgx-debug", "sgx-mode64", NULL,
"sgx-provisionkey", "sgx-tokenkey", NULL, "sgx-kss",
NULL, NULL, NULL, NULL,
NULL, NULL, "sgx-aex-notify", NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,