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From: Cathy Zhang <[email protected]>
To: [email protected], [email protected]
Cc: [email protected], [email protected], [email protected]
Subject: [RFC PATCH v2 05/10] x86/sgx: Save the size of each EPC section
Date: Tue, 15 Mar 2022 09:02:55 +0800	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

For SGX CPUSVN update process will check all EPC pages in each
section to ensure they will be marked as unused, it requires to
know the size of each EPC section to end the loop.

Signed-off-by: Cathy Zhang <[email protected]>
---
 arch/x86/kernel/cpu/sgx/sgx.h  | 1 +
 arch/x86/kernel/cpu/sgx/main.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h
index 1dd06899a64c..8fa0f9c64a13 100644
--- a/arch/x86/kernel/cpu/sgx/sgx.h
+++ b/arch/x86/kernel/cpu/sgx/sgx.h
@@ -63,6 +63,7 @@ struct sgx_epc_section {
 	void *virt_addr;
 	struct sgx_epc_page *pages;
 	struct sgx_numa_node *node;
+	u64 size;
 };
 
 extern struct sgx_epc_section sgx_epc_sections[SGX_MAX_EPC_SECTIONS];
diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index 99c86b77ca8f..c9331f6ba034 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -636,6 +636,7 @@ static bool __init sgx_setup_epc_section(u64 phys_addr, u64 size,
 	}
 
 	section->phys_addr = phys_addr;
+	section->size = size;
 	xa_store_range(&sgx_epc_address_space, section->phys_addr,
 		       phys_addr + size - 1, section, GFP_KERNEL);
 
-- 
2.17.1



  parent reply	other threads:[~2022-03-15  1:03 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-15  1:02 [RFC PATCH v2 00/10] Support microcode updates affecting SGX Cathy Zhang
2022-03-15  1:02 ` [RFC PATCH v2 01/10] x86/sgx: Introduce mechanism to prevent new initializations of EPC pages Cathy Zhang
2022-03-15  1:02 ` [RFC PATCH v2 02/10] x86/sgx: Provide VA page non-NULL owner Cathy Zhang
2022-03-15  1:02 ` [RFC PATCH v2 03/10] x86/sgx: Save enclave pointer for VA page Cathy Zhang
2022-03-15  1:02 ` [RFC PATCH v2 04/10] x86/sgx: Keep record for SGX VA and Guest page type Cathy Zhang
2022-03-15  1:02 ` Cathy Zhang [this message]
2022-03-15  1:02 ` [RFC PATCH v2 06/10] x86/sgx: Forced EPC page zapping for EUPDATESVN Cathy Zhang
2022-03-15  1:02 ` [RFC PATCH v2 07/10] x86/sgx: Define error codes for ENCLS[EUPDATESVN] Cathy Zhang
2022-03-15  1:02 ` [RFC PATCH v2 08/10] x86/sgx: Implement ENCLS[EUPDATESVN] Cathy Zhang
2022-03-15  1:02 ` [RFC PATCH v2 09/10] x86/cpu: Call ENCLS[EUPDATESVN] procedure in microcode update Cathy Zhang
     [not found]   ` <[email protected]>
2022-03-16 15:42     ` Dave Hansen
     [not found]     ` <[email protected]>
2022-03-16 15:47       ` Dave Hansen
2022-03-15  1:03 ` [RFC PATCH v2 10/10] x86/sgx: Call ENCLS[EUPDATESVN] during SGX initialization Cathy Zhang

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