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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
This commit is contained in:
Aneesh Kumar K.V 2020-11-27 10:14:07 +05:30 committed by Michael Ellerman
parent 39df17bc20
commit 3b47b7549e
4 changed files with 28 additions and 23 deletions
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6
arch/powerpc/include/asm/book3s/64/kup-radix.h → arch/powerpc/include/asm/book3s/64/kup.h
View File

@ -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 */

4
arch/powerpc/include/asm/kup.h
View File

@ -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

22
arch/powerpc/mm/book3s64/pkeys.c
View File

@ -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 @@ void __init pkey_early_init_devtree(void)
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);

19
arch/powerpc/mm/book3s64/radix_pgtable.c
View File

@ -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;