[RFC PATCH 05/11] x86/sgx: Save the size of each EPC section

[Cathy Zhang <cathy.zhang@intel.com>]

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 <cathy.zhang@intel.com>
---
 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