linux-kernel - [PATCH v3 2/3] x86/mm: Regularize set_memory

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Fri,  5 Jan 2024 10:30:24 -0800
From: mhkelley58@...il.com
To: tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	dave.hansen@...ux.intel.com,
	x86@...nel.org,
	hpa@...or.com,
	kirill.shutemov@...ux.intel.com,
	haiyangz@...rosoft.com,
	wei.liu@...nel.org,
	decui@...rosoft.com,
	luto@...nel.org,
	peterz@...radead.org,
	akpm@...ux-foundation.org,
	urezki@...il.com,
	hch@...radead.org,
	lstoakes@...il.com,
	thomas.lendacky@....com,
	ardb@...nel.org,
	jroedel@...e.de,
	seanjc@...gle.com,
	rick.p.edgecombe@...el.com,
	sathyanarayanan.kuppuswamy@...ux.intel.com,
	linux-kernel@...r.kernel.org,
	linux-coco@...ts.linux.dev,
	linux-hyperv@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH v3 2/3] x86/mm: Regularize set_memory_p() parameters and make non-static

From: Michael Kelley <mhklinux@...look.com>

set_memory_p() is currently static.  It has parameters that don't
match set_memory_p() under arch/powerpc and that aren't congruent
with the other set_memory_* functions. There's no good reason for
the difference.

Fix this by making the parameters consistent, and update the one
existing call site.  Make the function non-static and add it to
include/asm/set_memory.h so that it is completely parallel to
set_memory_np() and is usable in other modules.

No functional change.

Signed-off-by: Michael Kelley <mhklinux@...look.com>
---
 arch/x86/include/asm/set_memory.h |  1 +
 arch/x86/mm/pat/set_memory.c      | 12 ++++++------
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index a5e89641bd2d..9aee31862b4a 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -47,6 +47,7 @@ int set_memory_uc(unsigned long addr, int numpages);
 int set_memory_wc(unsigned long addr, int numpages);
 int set_memory_wb(unsigned long addr, int numpages);
 int set_memory_np(unsigned long addr, int numpages);
+int set_memory_p(unsigned long addr, int numpages);
 int set_memory_4k(unsigned long addr, int numpages);
 int set_memory_encrypted(unsigned long addr, int numpages);
 int set_memory_decrypted(unsigned long addr, int numpages);
diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c
index 8e19796e7ce5..05d42395a462 100644
--- a/arch/x86/mm/pat/set_memory.c
+++ b/arch/x86/mm/pat/set_memory.c
@@ -2046,17 +2046,12 @@ int set_mce_nospec(unsigned long pfn)
 	return rc;
 }
 
-static int set_memory_p(unsigned long *addr, int numpages)
-{
-	return change_page_attr_set(addr, numpages, __pgprot(_PAGE_PRESENT), 0);
-}
-
 /* Restore full speculative operation to the pfn. */
 int clear_mce_nospec(unsigned long pfn)
 {
 	unsigned long addr = (unsigned long) pfn_to_kaddr(pfn);
 
-	return set_memory_p(&addr, 1);
+	return set_memory_p(addr, 1);
 }
 EXPORT_SYMBOL_GPL(clear_mce_nospec);
 #endif /* CONFIG_X86_64 */
@@ -2109,6 +2104,11 @@ int set_memory_np_noalias(unsigned long addr, int numpages)
 					CPA_NO_CHECK_ALIAS, NULL);
 }
 
+int set_memory_p(unsigned long addr, int numpages)
+{
+	return change_page_attr_set(&addr, numpages, __pgprot(_PAGE_PRESENT), 0);
+}
+
 int set_memory_4k(unsigned long addr, int numpages)
 {
 	return change_page_attr_set_clr(&addr, numpages, __pgprot(0),
-- 
2.25.1