diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-11-27 07:44:07 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-03 17:01:24 +0300 |
| commit | 3b47b7549ead0719e94022c6742199333c7c8d9f (patch) | |
| tree | 664fc66cb58bd24fa1245b32c4b9a26633b1053e /arch/powerpc | |
| parent | 39df17bc20059c84ddc6f91831fce2e2cc79a6f3 (diff) | |
| download | linux-3b47b7549ead0719e94022c6742199333c7c8d9f.tar.xz | |
powerpc/book3s64/kuap: Move KUAP related function outside radix
The next set of patches adds support for kuap with hash translation.
In preparation for that rename/move kuap related functions to
non radix names.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-6-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/kup.h (renamed from arch/powerpc/include/asm/book3s/64/kup-radix.h) | 6 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/kup.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/mm/book3s64/pkeys.c | 22 | ||||
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_pgtable.c | 19 |
4 files changed, 28 insertions, 23 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/kup-radix.h b/arch/powerpc/include/asm/book3s/64/kup.h index 2fb8ee7b1e2a..8735d2dede94 100644 --- a/arch/powerpc/include/asm/book3s/64/kup-radix.h +++ b/arch/powerpc/include/asm/book3s/64/kup.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H -#define _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H +#ifndef _ASM_POWERPC_BOOK3S_64_KUP_H +#define _ASM_POWERPC_BOOK3S_64_KUP_H #include <linux/const.h> #include <asm/reg.h> @@ -202,4 +202,4 @@ static inline void restore_user_access(unsigned long flags) } #endif /* __ASSEMBLY__ */ -#endif /* _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H */ +#endif /* _ASM_POWERPC_BOOK3S_64_KUP_H */ diff --git a/arch/powerpc/include/asm/kup.h b/arch/powerpc/include/asm/kup.h index 0d93331d0fab..a06e50b68d40 100644 --- a/arch/powerpc/include/asm/kup.h +++ b/arch/powerpc/include/asm/kup.h @@ -15,11 +15,13 @@ #define KUAP_CURRENT (KUAP_CURRENT_READ | KUAP_CURRENT_WRITE) #ifdef CONFIG_PPC_BOOK3S_64 -#include <asm/book3s/64/kup-radix.h> +#include <asm/book3s/64/kup.h> #endif + #ifdef CONFIG_PPC_8xx #include <asm/nohash/32/kup-8xx.h> #endif + #ifdef CONFIG_PPC_BOOK3S_32 #include <asm/book3s/32/kup.h> #endif diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c index 7dc71f85683d..c75994cf50a7 100644 --- a/arch/powerpc/mm/book3s64/pkeys.c +++ b/arch/powerpc/mm/book3s64/pkeys.c @@ -9,9 +9,12 @@ #include <asm/mmu_context.h> #include <asm/mmu.h> #include <asm/setup.h> +#include <asm/smp.h> + #include <linux/pkeys.h> #include <linux/of_fdt.h> + int num_pkey; /* Max number of pkeys supported */ /* * Keys marked in the reservation list cannot be allocated by userspace @@ -226,6 +229,25 @@ out: return; } +#ifdef CONFIG_PPC_KUAP +void __init setup_kuap(bool disabled) +{ + if (disabled || !early_radix_enabled()) + return; + + if (smp_processor_id() == boot_cpuid) { + pr_info("Activating Kernel Userspace Access Prevention\n"); + cur_cpu_spec->mmu_features |= MMU_FTR_RADIX_KUAP; + } + + /* + * Set the default kernel AMR values on all cpus. + */ + mtspr(SPRN_AMR, AMR_KUAP_BLOCKED); + isync(); +} +#endif + static inline u64 read_amr(void) { return mfspr(SPRN_AMR); diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index f5f248d44d5c..fe2c26dbcb28 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -609,25 +609,6 @@ void setup_kuep(bool disabled) } #endif -#ifdef CONFIG_PPC_KUAP -void setup_kuap(bool disabled) -{ - if (disabled || !early_radix_enabled()) - return; - - if (smp_processor_id() == boot_cpuid) { - pr_info("Activating Kernel Userspace Access Prevention\n"); - cur_cpu_spec->mmu_features |= MMU_FTR_RADIX_KUAP; - } - - /* - * Set the default kernel AMR values on all cpus. - */ - mtspr(SPRN_AMR, AMR_KUAP_BLOCKED); - isync(); -} -#endif - void __init radix__early_init_mmu(void) { unsigned long lpcr; |