From: Reinette Chatre <reinette.chatre@intel.com>
To: dave.hansen@linux.intel.com, jarkko@kernel.org,
tglx@linutronix.de, bp@alien8.de, luto@kernel.org,
mingo@redhat.com, linux-sgx@vger.kernel.org, x86@kernel.org
Cc: seanjc@google.com, kai.huang@intel.com, cathy.zhang@intel.com,
cedric.xing@intel.com, haitao.huang@intel.com,
mark.shanahan@intel.com, hpa@zytor.com,
linux-kernel@vger.kernel.org
Subject: [PATCH V3 24/30] selftests/sgx: Introduce dynamic entry point
Date: Mon, 4 Apr 2022 09:49:32 -0700 [thread overview]
Message-ID: <a3fe0be22afdde289966b87861ff1c141f9ef512.1648847675.git.reinette.chatre@intel.com> (raw)
In-Reply-To: <cover.1648847675.git.reinette.chatre@intel.com>
The test enclave (test_encl.elf) is built with two initialized
Thread Control Structures (TCS) included in the binary. Both TCS are
initialized with the same entry point, encl_entry, that correctly
computes the absolute address of the stack based on the stack of each
TCS that is also built into the binary.
A new TCS can be added dynamically to the enclave and requires to be
initialized with an entry point used to enter the enclave. Since the
existing entry point, encl_entry, assumes that the TCS and its stack
exists at particular offsets within the binary it is not able to handle
a dynamically added TCS and its stack.
Introduce a new entry point, encl_dyn_entry, that initializes the
absolute address of that thread's stack to the address immediately
preceding the TCS itself. It is now possible to dynamically add a
contiguous memory region to the enclave with the new stack preceding
the new TCS. With the new TCS initialized with encl_dyn_entry as entry
point the absolute address of the stack is computed correctly on entry.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
---
No changes since V2
No changes since V1
tools/testing/selftests/sgx/test_encl_bootstrap.S | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S
index 82fb0dfcbd23..03ae0f57e29d 100644
--- a/tools/testing/selftests/sgx/test_encl_bootstrap.S
+++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S
@@ -45,6 +45,12 @@ encl_entry:
# TCS #2. By adding the value of encl_stack to it, we get
# the absolute address for the stack.
lea (encl_stack)(%rbx), %rax
+ jmp encl_entry_core
+encl_dyn_entry:
+ # Entry point for dynamically created TCS page expected to follow
+ # its stack directly.
+ lea -1(%rbx), %rax
+encl_entry_core:
xchg %rsp, %rax
push %rax
--
2.25.1
next prev parent reply other threads:[~2022-04-04 21:25 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-04 16:49 [PATCH V3 00/30] x86/sgx and selftests/sgx: Support SGX2 Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 01/30] x86/sgx: Add short descriptions to ENCLS wrappers Reinette Chatre
2022-04-05 6:52 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 02/30] x86/sgx: Add wrapper for SGX2 EMODPR function Reinette Chatre
2022-04-05 6:53 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 03/30] x86/sgx: Add wrapper for SGX2 EMODT function Reinette Chatre
2022-04-05 6:53 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 04/30] x86/sgx: Add wrapper for SGX2 EAUG function Reinette Chatre
2022-04-05 6:54 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 05/30] x86/sgx: Support loading enclave page without VMA permissions check Reinette Chatre
2022-04-05 6:56 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 06/30] x86/sgx: Export sgx_encl_ewb_cpumask() Reinette Chatre
2022-04-05 6:56 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 07/30] x86/sgx: Rename sgx_encl_ewb_cpumask() as sgx_encl_cpumask() Reinette Chatre
2022-04-05 6:57 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 08/30] x86/sgx: Move PTE zap code to new sgx_zap_enclave_ptes() Reinette Chatre
2022-04-05 6:59 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 09/30] x86/sgx: Make sgx_ipi_cb() available internally Reinette Chatre
2022-04-05 6:59 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 10/30] x86/sgx: Create utility to validate user provided offset and length Reinette Chatre
2022-04-05 7:00 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 11/30] x86/sgx: Keep record of SGX page type Reinette Chatre
2022-04-05 7:00 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 12/30] x86/sgx: Export sgx_encl_{grow,shrink}() Reinette Chatre
2022-04-05 7:04 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 13/30] x86/sgx: Export sgx_encl_page_alloc() Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 14/30] x86/sgx: Support restricting of enclave page permissions Reinette Chatre
2022-04-05 5:03 ` Jarkko Sakkinen
2022-04-05 5:07 ` Jarkko Sakkinen
2022-04-05 13:40 ` Jarkko Sakkinen
2022-04-05 14:19 ` Jarkko Sakkinen
2022-04-05 14:27 ` Jarkko Sakkinen
2022-04-05 14:52 ` Jarkko Sakkinen
2022-04-05 16:49 ` Reinette Chatre
2022-04-05 18:39 ` Jarkko Sakkinen
2022-04-05 18:59 ` Reinette Chatre
2022-04-06 7:30 ` Jarkko Sakkinen
2022-04-06 17:51 ` Reinette Chatre
2022-04-05 16:40 ` Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 15/30] x86/sgx: Support adding of pages to an initialized enclave Reinette Chatre
2022-04-05 5:05 ` Jarkko Sakkinen
2022-04-05 10:03 ` Jarkko Sakkinen
2022-04-06 7:37 ` Jarkko Sakkinen
2022-04-06 22:42 ` Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 16/30] x86/sgx: Tighten accessible memory range after enclave initialization Reinette Chatre
2022-04-05 7:05 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 17/30] x86/sgx: Support modifying SGX page type Reinette Chatre
2022-04-05 7:06 ` Jarkko Sakkinen
2022-04-05 15:34 ` Jarkko Sakkinen
2022-04-05 17:05 ` Reinette Chatre
2022-04-05 18:41 ` Jarkko Sakkinen
2022-04-05 18:59 ` Reinette Chatre
2022-04-06 7:32 ` Jarkko Sakkinen
2022-04-06 17:50 ` Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 18/30] x86/sgx: Support complete page removal Reinette Chatre
2022-04-05 7:08 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 19/30] x86/sgx: Free up EPC pages directly to support large page ranges Reinette Chatre
2022-04-05 7:11 ` Jarkko Sakkinen
2022-04-05 17:13 ` Reinette Chatre
2022-04-05 17:25 ` Dave Hansen
2022-04-06 6:35 ` Jarkko Sakkinen
2022-04-06 17:50 ` Reinette Chatre
2022-04-05 18:42 ` Jarkko Sakkinen
2022-04-05 19:56 ` Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 20/30] Documentation/x86: Introduce enclave runtime management section Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 21/30] selftests/sgx: Add test for EPCM permission changes Reinette Chatre
2022-04-05 7:02 ` Jarkko Sakkinen
2022-04-05 7:03 ` Jarkko Sakkinen
2022-04-05 17:28 ` Reinette Chatre
2022-04-05 18:43 ` Jarkko Sakkinen
2022-04-04 16:49 ` [PATCH V3 22/30] selftests/sgx: Add test for TCS page " Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 23/30] selftests/sgx: Test two different SGX2 EAUG flows Reinette Chatre
2022-04-04 16:49 ` Reinette Chatre [this message]
2022-04-04 16:49 ` [PATCH V3 25/30] selftests/sgx: Introduce TCS initialization enclave operation Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 26/30] selftests/sgx: Test complete changing of page type flow Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 27/30] selftests/sgx: Test faulty enclave behavior Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 28/30] selftests/sgx: Test invalid access to removed enclave page Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 29/30] selftests/sgx: Test reclaiming of untouched page Reinette Chatre
2022-04-04 16:49 ` [PATCH V3 30/30] selftests/sgx: Page removal stress test Reinette Chatre
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