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* [PATCH 1/5] powerpc/kuap: Force inlining of all first level KUAP helpers.
@ 2021-05-12  8:35 Christophe Leroy
  2021-05-12  8:35 ` [PATCH 2/5] powerpc/32s: Refactor update of user segment registers Christophe Leroy
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: Christophe Leroy @ 2021-05-12  8:35 UTC (permalink / raw)
  To: Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
  Cc: linuxppc-dev, linux-kernel

All KUAP helpers defined in asm/kup.h are single line functions
that should be inlined. But on book3s/32 build, we get many
instances of <prevent_write_to_user.constprop.0>.

Force inlining of those helpers.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/include/asm/kup.h | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/arch/powerpc/include/asm/kup.h b/arch/powerpc/include/asm/kup.h
index ec96232529ac..a35ded8bedcd 100644
--- a/arch/powerpc/include/asm/kup.h
+++ b/arch/powerpc/include/asm/kup.h
@@ -96,51 +96,51 @@ static __always_inline void setup_kup(void)
 	setup_kuap(disable_kuap);
 }
 
-static inline void allow_read_from_user(const void __user *from, unsigned long size)
+static __always_inline void allow_read_from_user(const void __user *from, unsigned long size)
 {
 	barrier_nospec();
 	allow_user_access(NULL, from, size, KUAP_READ);
 }
 
-static inline void allow_write_to_user(void __user *to, unsigned long size)
+static __always_inline void allow_write_to_user(void __user *to, unsigned long size)
 {
 	allow_user_access(to, NULL, size, KUAP_WRITE);
 }
 
-static inline void allow_read_write_user(void __user *to, const void __user *from,
-					 unsigned long size)
+static __always_inline void allow_read_write_user(void __user *to, const void __user *from,
+						  unsigned long size)
 {
 	barrier_nospec();
 	allow_user_access(to, from, size, KUAP_READ_WRITE);
 }
 
-static inline void prevent_read_from_user(const void __user *from, unsigned long size)
+static __always_inline void prevent_read_from_user(const void __user *from, unsigned long size)
 {
 	prevent_user_access(NULL, from, size, KUAP_READ);
 }
 
-static inline void prevent_write_to_user(void __user *to, unsigned long size)
+static __always_inline void prevent_write_to_user(void __user *to, unsigned long size)
 {
 	prevent_user_access(to, NULL, size, KUAP_WRITE);
 }
 
-static inline void prevent_read_write_user(void __user *to, const void __user *from,
-					   unsigned long size)
+static __always_inline void prevent_read_write_user(void __user *to, const void __user *from,
+						    unsigned long size)
 {
 	prevent_user_access(to, from, size, KUAP_READ_WRITE);
 }
 
-static inline void prevent_current_access_user(void)
+static __always_inline void prevent_current_access_user(void)
 {
 	prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT);
 }
 
-static inline void prevent_current_read_from_user(void)
+static __always_inline void prevent_current_read_from_user(void)
 {
 	prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_READ);
 }
 
-static inline void prevent_current_write_to_user(void)
+static __always_inline void prevent_current_write_to_user(void)
 {
 	prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_WRITE);
 }
-- 
2.25.0


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Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-12  8:35 [PATCH 1/5] powerpc/kuap: Force inlining of all first level KUAP helpers Christophe Leroy
2021-05-12  8:35 ` [PATCH 2/5] powerpc/32s: Refactor update of user segment registers Christophe Leroy
2021-05-12  8:35 ` [PATCH 3/5] powerpc/kuap: Rework Kernel Userspace Access Protection on book3s/32 Christophe Leroy
2021-05-12  8:35 ` [PATCH 4/5] powerpc/kuap: Remove KUAP_CURRENT_XXX Christophe Leroy
2021-05-12  8:35 ` [PATCH 5/5] powerpc/kuap: Remove to/from/size parameters of prevent_user_access() Christophe Leroy

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