The next set of patches adds support for kuap with hash translation.
Hence make KUAP a BOOK3S_64 feature. Also make it a subfeature of
PPC_MEM_KEYS. Hash translation is going to use pkeys to support
KUAP/KUEP. Adding this dependency reduces the code complexity and
enables us to move some of the initialization code to pkeys.c
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
---
arch/powerpc/include/asm/book3s/64/kup.h | 33 ++++++++++++++----------
arch/powerpc/include/asm/ptrace.h | 2 +-
arch/powerpc/kernel/asm-offsets.c | 2 +-
arch/powerpc/platforms/Kconfig.cputype | 4 +--
4 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/kup.h
b/arch/powerpc/include/asm/book3s/64/kup.h
index 476bcd7b0e8b..aa2787c8b12a 100644
--- a/arch/powerpc/include/asm/book3s/64/kup.h
+++ b/arch/powerpc/include/asm/book3s/64/kup.h
@@ -62,7 +62,7 @@
#else /* !__ASSEMBLY__ */
-#ifdef CONFIG_PPC_KUAP
+#ifdef CONFIG_PPC_MEM_KEYS
#include <asm/mmu.h>
#include <asm/ptrace.h>
@@ -97,6 +97,24 @@ static inline void kuap_check_amr(void)
WARN_ON_ONCE(mfspr(SPRN_AMR) != AMR_KUAP_BLOCKED);
}
+#else /* CONFIG_PPC_MEM_KEYS */
+
+static inline void kuap_restore_amr(struct pt_regs *regs, unsigned long amr)
+{
+}
+
+static inline void kuap_check_amr(void)
+{
+}
+
+static inline unsigned long kuap_get_and_check_amr(void)
+{
+ return 0;
+}
+#endif /* CONFIG_PPC_MEM_KEYS */
+
+
+#ifdef CONFIG_PPC_KUAP
/*
* We support individually allowing read or write, but we don't support nesting
* because that would require an expensive read/modify write of the AMR.
@@ -166,19 +184,6 @@ bad_kuap_fault(struct pt_regs *regs, unsigned long
address, bool is_write)
(regs->kuap & (is_write ? AMR_KUAP_BLOCK_WRITE :
AMR_KUAP_BLOCK_READ)),
"Bug: %s fault blocked by AMR!", is_write ? "Write" :
"Read");
}
-#else /* CONFIG_PPC_KUAP */
-static inline void kuap_restore_amr(struct pt_regs *regs, unsigned long amr)
-{
-}
-
-static inline void kuap_check_amr(void)
-{
-}
-
-static inline unsigned long kuap_get_and_check_amr(void)
-{
- return 0;
-}
#endif /* CONFIG_PPC_KUAP */
#endif /* __ASSEMBLY__ */
diff --git a/arch/powerpc/include/asm/ptrace.h
b/arch/powerpc/include/asm/ptrace.h
index ac3970fff0d5..1a6cadf63d14 100644
--- a/arch/powerpc/include/asm/ptrace.h
+++ b/arch/powerpc/include/asm/ptrace.h
@@ -53,7 +53,7 @@ struct pt_regs
#ifdef CONFIG_PPC64
unsigned long ppr;
#endif
-#ifdef CONFIG_PPC_KUAP
+#ifdef CONFIG_PPC_HAVE_KUAP
unsigned long kuap;
#endif
};
diff --git a/arch/powerpc/kernel/asm-offsets.c
b/arch/powerpc/kernel/asm-offsets.c
index 9b9cde07e396..1694c4f531b9 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -354,7 +354,7 @@ int main(void)
STACK_PT_REGS_OFFSET(_PPR, ppr);
#endif /* CONFIG_PPC64 */
-#ifdef CONFIG_PPC_KUAP
+#ifdef CONFIG_PPC_HAVE_KUAP
STACK_PT_REGS_OFFSET(STACK_REGS_KUAP, kuap);
#endif
diff --git a/arch/powerpc/platforms/Kconfig.cputype
b/arch/powerpc/platforms/Kconfig.cputype
index d349603fb889..053c46aecf80 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -99,6 +99,8 @@ config PPC_BOOK3S_64
select ARCH_SUPPORTS_NUMA_BALANCING
select IRQ_WORK
select PPC_MM_SLICES
+ select PPC_HAVE_KUAP if PPC_MEM_KEYS
+ select PPC_HAVE_KUEP if PPC_MEM_KEYS
config PPC_BOOK3E_64
bool "Embedded processors"
@@ -350,8 +352,6 @@ config PPC_RADIX_MMU
bool "Radix MMU Support"
depends on PPC_BOOK3S_64
select ARCH_HAS_GIGANTIC_PAGE
- select PPC_HAVE_KUEP
- select PPC_HAVE_KUAP
default y
help
Enable support for the Power ISA 3.0 Radix style MMU. Currently this
--
2.26.2
