Commit-ID: 5fe26b7a8f4693d532c7a3c3632e47e7d7016238 Gitweb: https://git.kernel.org/tip/5fe26b7a8f4693d532c7a3c3632e47e7d7016238 Author: Peter Zijlstra <pet...@infradead.org> AuthorDate: Mon, 3 Dec 2018 18:03:48 +0100 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Mon, 17 Dec 2018 18:54:25 +0100
x86/mm/cpa: Simplify the code after making cpa->vaddr invariant Since cpa->vaddr is invariant, this means we can remove all workarounds that deal with it changing. Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Dave Hansen <dave.han...@linux.intel.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Rik van Riel <r...@surriel.com> Cc: Thomas Gleixner <t...@linutronix.de> Cc: tom.stde...@amd.com Cc: dave.han...@intel.com Link: http://lkml.kernel.org/r/20181203171043.366619...@infradead.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/mm/pageattr-test.c | 7 ++----- arch/x86/mm/pageattr.c | 13 ++++--------- 2 files changed, 6 insertions(+), 14 deletions(-) diff --git a/arch/x86/mm/pageattr-test.c b/arch/x86/mm/pageattr-test.c index b6b6468530f1..facce271e8b9 100644 --- a/arch/x86/mm/pageattr-test.c +++ b/arch/x86/mm/pageattr-test.c @@ -124,7 +124,6 @@ static int pageattr_test(void) unsigned int level; int i, k; int err; - unsigned long test_addr; if (print) printk(KERN_INFO "CPA self-test:\n"); @@ -181,8 +180,7 @@ static int pageattr_test(void) switch (i % 3) { case 0: - test_addr = addr[i]; - err = change_page_attr_set(&test_addr, len[i], PAGE_CPA_TEST, 0); + err = change_page_attr_set(&addr[i], len[i], PAGE_CPA_TEST, 0); break; case 1: @@ -226,8 +224,7 @@ static int pageattr_test(void) failed++; continue; } - test_addr = addr[i]; - err = change_page_attr_clear(&test_addr, len[i], PAGE_CPA_TEST, 0); + err = change_page_attr_clear(&addr[i], len[i], PAGE_CPA_TEST, 0); if (err < 0) { printk(KERN_ERR "CPA reverting failed: %d\n", err); failed++; diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index ce8af3f08628..afa98b7b6050 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -1908,15 +1908,13 @@ EXPORT_SYMBOL_GPL(set_memory_array_wt); int _set_memory_wc(unsigned long addr, int numpages) { int ret; - unsigned long addr_copy = addr; ret = change_page_attr_set(&addr, numpages, cachemode2pgprot(_PAGE_CACHE_MODE_UC_MINUS), 0); if (!ret) { - ret = change_page_attr_set_clr(&addr_copy, numpages, - cachemode2pgprot( - _PAGE_CACHE_MODE_WC), + ret = change_page_attr_set_clr(&addr, numpages, + cachemode2pgprot(_PAGE_CACHE_MODE_WC), __pgprot(_PAGE_CACHE_MASK), 0, 0, NULL); } @@ -2064,7 +2062,6 @@ int set_memory_global(unsigned long addr, int numpages) static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc) { struct cpa_data cpa; - unsigned long start; int ret; /* Nothing to do if memory encryption is not active */ @@ -2075,8 +2072,6 @@ static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc) if (WARN_ONCE(addr & ~PAGE_MASK, "misaligned address: %#lx\n", addr)) addr &= PAGE_MASK; - start = addr; - memset(&cpa, 0, sizeof(cpa)); cpa.vaddr = &addr; cpa.numpages = numpages; @@ -2091,7 +2086,7 @@ static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc) /* * Before changing the encryption attribute, we need to flush caches. */ - cpa_flush_range(start, numpages, 1); + cpa_flush_range(addr, numpages, 1); ret = __change_page_attr_set_clr(&cpa, 1); @@ -2102,7 +2097,7 @@ static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc) * in case TLB flushing gets optimized in the cpa_flush_range() * path use the same logic as above. */ - cpa_flush_range(start, numpages, 0); + cpa_flush_range(addr, numpages, 0); return ret; }
