From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
linuxram@us.ibm.com, bauerman@linux.ibm.com
Subject: [PATCH v6 14/23] powerpc/book3s64/kuep: Add MMU_FTR_KUEP
Date: Thu, 9 Jul 2020 08:59:37 +0530 [thread overview]
Message-ID: <20200709032946.881753-15-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20200709032946.881753-1-aneesh.kumar@linux.ibm.com>
This will be used to enable/disable Kernel Userspace Execution
Prevention (KUEP).
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
arch/powerpc/include/asm/mmu.h | 8 ++++++++
arch/powerpc/mm/book3s64/radix_pgtable.c | 4 +++-
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 88aed01fad81..df767315ec8c 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -28,6 +28,10 @@
* Individual features below.
*/
+/*
+ * Suppor for KUEP feature.
+ */
+#define MMU_FTR_KUEP ASM_CONST(0x00000800)
/*
* Support for memory protection keys.
*/
@@ -184,6 +188,10 @@ enum {
#ifdef CONFIG_PPC_MEM_KEYS
MMU_FTR_PKEY |
#endif
+#ifdef CONFIG_PPC_KUEP
+ MMU_FTR_KUEP |
+#endif /* CONFIG_PPC_KUAP */
+
0,
};
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index bb00e0cba119..6d814c9bb4bf 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -519,8 +519,10 @@ void setup_kuep(bool disabled)
if (disabled || !early_radix_enabled())
return;
- if (smp_processor_id() == boot_cpuid)
+ if (smp_processor_id() == boot_cpuid) {
pr_info("Activating Kernel Userspace Execution Prevention\n");
+ cur_cpu_spec->mmu_features |= MMU_FTR_KUEP;
+ }
/*
* Radix always uses key0 of the IAMR to determine if an access is
--
2.26.2
next prev parent reply other threads:[~2020-07-09 3:56 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-09 3:29 [PATCH v6 00/23] powerpc/book3s/64/pkeys: Simplify the code Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 01/23] powerpc/book3s64/pkeys: Use PVR check instead of cpu feature Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 02/23] powerpc/book3s64/pkeys: Fixup bit numbering Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 03/23] powerpc/book3s64/pkeys: pkeys are supported only on hash on book3s Aneesh Kumar K.V
2020-07-20 6:05 ` Michael Ellerman
2020-07-20 6:15 ` Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 04/23] powerpc/book3s64/pkeys: Move pkey related bits in the linux page table Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 05/23] powerpc/book3s64/pkeys: Explain key 1 reservation details Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 06/23] powerpc/book3s64/pkeys: Simplify the key initialization Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 07/23] powerpc/book3s64/pkeys: Prevent key 1 modification from userspace Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 08/23] powerpc/book3s64/pkeys: kill cpu feature key CPU_FTR_PKEY Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 09/23] powerpc/book3s64/pkeys: Simplify pkey disable branch Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 10/23] powerpc/book3s64/pkeys: Convert pkey_total to num_pkey Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 11/23] powerpc/book3s64/pkeys: Make initial_allocation_mask static Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 12/23] powerpc/book3s64/pkeys: Mark all the pkeys above max pkey as reserved Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 13/23] powerpc/book3s64/pkeys: Add MMU_FTR_PKEY Aneesh Kumar K.V
2020-07-09 3:29 ` Aneesh Kumar K.V [this message]
2020-07-09 3:29 ` [PATCH v6 15/23] powerpc/book3s64/pkeys: Use pkey_execute_disable_supported Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 16/23] powerpc/book3s64/pkeys: Use MMU_FTR_PKEY instead of pkey_disabled static key Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 17/23] powerpc/book3s64/keys: Print information during boot Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 18/23] powerpc/book3s64/keys/kuap: Reset AMR/IAMR values on kexec Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 19/23] powerpc/book3s64/kuap: Move UAMOR setup to key init function Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 20/23] powerpc/selftest/ptrave-pkey: Rename variables to make it easier to follow code Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 21/23] powerpc/selftest/ptrace-pkey: Update the test to mark an invalid pkey correctly Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 22/23] powerpc/selftest/ptrace-pkey: Don't update expected UAMOR value Aneesh Kumar K.V
2020-07-09 3:29 ` [PATCH v6 23/23] powerpc/book3s64/pkeys: Remove is_pkey_enabled() Aneesh Kumar K.V
2020-07-24 13:24 ` [PATCH v6 00/23] powerpc/book3s/64/pkeys: Simplify the code Michael Ellerman
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