Commit 68203083 authored Jul 08, 2022 by Sean Christopherson Committed by Zhiquan Li Oct 10, 2022

x86/sgx: Drop 'page_index' from sgx_backing

mainline inclusion
from mainline-6.0-rc1
commit e0a5915f
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5USAM


CVE: NA

Intel-SIG: commit e0a5915f x86/sgx: Drop 'page_index' from
sgx_backing.
Backport for SGX EDMM support.

--------------------------------

Storing the 'page_index' value in the sgx_backing struct is
dead code and no longer needed.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Kristen Carlson Accardi <kristen@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/20220708162124.8442-1-kristen@linux.intel.com


Signed-off-by: Zhiquan Li <zhiquan1.li@intel.com>

parent a3fd7294

arch/x86/kernel/cpu/sgx/encl.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -943,7 +943,6 @@ static int sgx_encl_get_backing(struct sgx_encl *encl, unsigned long page_index,
		return PTR_ERR(pcmd);
		}

		backing->page_index = page_index;
		backing->contents = contents;
		backing->pcmd = pcmd;
		backing->pcmd_offset = page_pcmd_off & (PAGE_SIZE - 1);

arch/x86/kernel/cpu/sgx/encl.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -79,7 +79,6 @@ struct sgx_va_page {
		};

		struct sgx_backing {
		pgoff_t page_index;
		struct page *contents;
		struct page *pcmd;
		unsigned long pcmd_offset;