From: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com> To: Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@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> Cc: <bpf@vger.kernel.org>, <linuxppc-dev@lists.ozlabs.org> Subject: [PATCH 8/9] powerpc/security: Add a helper to query stf_barrier type Date: Sat, 2 Oct 2021 02:44:54 +0530 [thread overview] Message-ID: <861670aa86ff3f41284960b0f259ab7a1dbae704.1633104510.git.naveen.n.rao@linux.vnet.ibm.com> (raw) In-Reply-To: <cover.1633104510.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
WARNING: multiple messages have this Message-ID (diff)
From: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com> To: Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@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> Cc: bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 8/9] powerpc/security: Add a helper to query stf_barrier type Date: Sat, 2 Oct 2021 02:44:54 +0530 [thread overview] Message-ID: <861670aa86ff3f41284960b0f259ab7a1dbae704.1633104510.git.naveen.n.rao@linux.vnet.ibm.com> (raw) In-Reply-To: <cover.1633104510.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:[~2021-10-01 21:17 UTC|newest] Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-01 21:14 [PATCH 0/9] powerpc/bpf: Various fixes Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-01 21:14 ` [PATCH 1/9] powerpc/lib: Add helper to check if offset is within conditional branch range Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-01 21:37 ` Song Liu 2021-10-01 21:37 ` Song Liu 2021-10-04 18:02 ` Naveen N. Rao 2021-10-04 18:02 ` Naveen N. Rao 2021-10-03 7:50 ` Christophe Leroy 2021-10-04 18:03 ` Naveen N. Rao 2021-10-01 21:14 ` [PATCH 2/9] powerpc/bpf: Validate branch ranges Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-01 21:45 ` Song Liu 2021-10-01 21:45 ` Song Liu 2021-10-02 17:29 ` Johan Almbladh 2021-10-02 17:29 ` Johan Almbladh 2021-10-03 7:54 ` Christophe Leroy 2021-10-04 18:11 ` Naveen N. Rao 2021-10-01 21:14 ` [PATCH 3/9] powerpc/bpf: Remove unused SEEN_STACK Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-01 21:47 ` Song Liu 2021-10-01 21:47 ` Song Liu 2021-10-02 17:30 ` Johan Almbladh 2021-10-02 17:30 ` Johan Almbladh 2021-10-03 7:55 ` Christophe Leroy 2021-10-04 18:11 ` Naveen N. Rao 2021-10-05 5:50 ` Christophe Leroy 2021-10-05 20:22 ` Naveen N. Rao 2021-10-01 21:14 ` [PATCH 4/9] powerpc/bpf: Handle large branch ranges with BPF_EXIT Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-01 21:53 ` Song Liu 2021-10-01 21:53 ` Song Liu 2021-10-02 17:31 ` Johan Almbladh 2021-10-02 17:31 ` Johan Almbladh 2021-10-03 7:59 ` Christophe Leroy 2021-10-04 18:24 ` Naveen N. Rao 2021-10-05 5:46 ` Christophe Leroy 2022-01-07 11:46 ` Naveen N. Rao 2021-10-01 21:14 ` [PATCH 5/9] powerpc/bpf: Fix BPF_MOD when imm == 1 Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-01 21:55 ` Song Liu 2021-10-01 21:55 ` Song Liu 2021-10-02 17:32 ` Johan Almbladh 2021-10-02 17:32 ` Johan Almbladh 2021-10-01 21:14 ` [PATCH 6/9] powerpc/bpf: Fix BPF_SUB when imm == 0x80000000 Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-01 22:01 ` Song Liu 2021-10-01 22:01 ` Song Liu 2021-10-02 17:33 ` Johan Almbladh 2021-10-02 17:33 ` Johan Almbladh 2021-10-03 8:07 ` Christophe Leroy 2021-10-04 18:18 ` Naveen N. Rao 2021-10-05 5:40 ` Christophe Leroy 2021-10-01 21:14 ` [PATCH 7/9] powerpc/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06 Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-02 17:35 ` Johan Almbladh 2021-10-02 17:35 ` Johan Almbladh 2021-10-01 21:14 ` Naveen N. Rao [this message] 2021-10-01 21:14 ` [PATCH 8/9] powerpc/security: Add a helper to query stf_barrier type Naveen N. Rao 2021-10-01 21:14 ` [PATCH 9/9] powerpc/bpf: Emit stf barrier instruction sequences for BPF_NOSPEC Naveen N. Rao 2021-10-01 21:14 ` Naveen N. Rao 2021-10-02 17:41 ` [PATCH 0/9] powerpc/bpf: Various fixes Johan Almbladh 2021-10-02 17:41 ` Johan Almbladh 2021-10-04 18:19 ` Naveen N. Rao 2021-10-04 18:19 ` Naveen N. Rao
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