From: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Jordan Niethe <jniethe5@gmail.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Johan Almbladh <johan.almbladh@anyfinetworks.com>,
Song Liu <songliubraving@fb.com>
Cc: <bpf@vger.kernel.org>, <linuxppc-dev@lists.ozlabs.org>
Subject: [PATCH v2 05/10] powerpc/security: Add a helper to query stf_barrier type
Date: Wed, 6 Oct 2021 01:55:24 +0530 [thread overview]
Message-ID: <3bd5d7f96ea1547991ac2ce3137dc2b220bae285.1633464148.git.naveen.n.rao@linux.vnet.ibm.com> (raw)
In-Reply-To: <cover.1633464148.git.naveen.n.rao@linux.vnet.ibm.com>
Add a helper to return the stf_barrier type for the current processor.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/security_features.h | 5 +++++
arch/powerpc/kernel/security.c | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/arch/powerpc/include/asm/security_features.h b/arch/powerpc/include/asm/security_features.h
index 792eefaf230b80..27574f218b371f 100644
--- a/arch/powerpc/include/asm/security_features.h
+++ b/arch/powerpc/include/asm/security_features.h
@@ -39,6 +39,11 @@ static inline bool security_ftr_enabled(u64 feature)
return !!(powerpc_security_features & feature);
}
+#ifdef CONFIG_PPC_BOOK3S_64
+enum stf_barrier_type stf_barrier_type_get(void);
+#else
+static inline enum stf_barrier_type stf_barrier_type_get(void) { return STF_BARRIER_NONE; }
+#endif
// Features indicating support for Spectre/Meltdown mitigations
diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index 1a998490fe60f0..15fb5ea1b9eafa 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -263,6 +263,11 @@ static int __init handle_no_stf_barrier(char *p)
early_param("no_stf_barrier", handle_no_stf_barrier);
+enum stf_barrier_type stf_barrier_type_get(void)
+{
+ return stf_enabled_flush_types;
+}
+
/* This is the generic flag used by other architectures */
static int __init handle_ssbd(char *p)
{
--
2.33.0
next prev parent reply other threads:[~2021-10-05 20:26 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-05 20:25 [PATCH v2 00/10] powerpc/bpf: Various fixes Naveen N. Rao
2021-10-05 20:25 ` [PATCH v2 01/10] powerpc/lib: Add helper to check if offset is within conditional branch range Naveen N. Rao
2021-10-06 4:50 ` Christophe Leroy
2021-10-05 20:25 ` [PATCH v2 02/10] powerpc/bpf: Validate branch ranges Naveen N. Rao
2021-10-06 4:51 ` LEROY Christophe
2021-10-06 4:51 ` Christophe Leroy
2021-10-05 20:25 ` [PATCH v2 03/10] powerpc/bpf: Fix BPF_MOD when imm == 1 Naveen N. Rao
2021-10-06 4:52 ` Christophe Leroy
2021-10-05 20:25 ` [PATCH v2 04/10] powerpc/bpf: Fix BPF_SUB when imm == 0x80000000 Naveen N. Rao
2021-10-06 4:55 ` Christophe Leroy
2021-10-07 8:47 ` Naveen N. Rao
2021-10-05 20:25 ` Naveen N. Rao [this message]
2021-10-05 20:25 ` [PATCH v2 06/10] powerpc/bpf: Emit stf barrier instruction sequences for BPF_NOSPEC Naveen N. Rao
2021-10-05 20:25 ` [PATCH v2 07/10] powerpc/bpf ppc32: Fix ALU32 BPF_ARSH operation Naveen N. Rao
2021-10-06 4:56 ` Christophe Leroy
2021-10-05 20:25 ` [PATCH v2 08/10] powerpc/bpf ppc32: Fix JMP32_JSET_K Naveen N. Rao
2021-10-06 5:00 ` Christophe Leroy
2021-10-05 20:25 ` [PATCH v2 09/10] powerpc/bpf ppc32: Do not emit zero extend instruction for 64-bit BPF_END Naveen N. Rao
2021-10-06 5:03 ` Christophe Leroy
2021-10-05 20:25 ` [PATCH v2 10/10] powerpc/bpf ppc32: Fix BPF_SUB when imm == 0x80000000 Naveen N. Rao
2021-10-06 5:02 ` Christophe Leroy
2021-10-08 13:22 ` [PATCH v2 00/10] powerpc/bpf: Various fixes Michael Ellerman
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