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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Sasha Levin <sashal@kernel.org>,
	npiggin@gmail.com, dja@axtens.net, lihuafei1@huawei.com,
	aik@ozlabs.ru, aneesh.kumar@linux.ibm.com,
	christophe.leroy@csgroup.eu, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH AUTOSEL 5.14 15/17] powerpc/security: Add a helper to query stf_barrier type
Date: Tue, 12 Oct 2021 20:54:39 -0400	[thread overview]
Message-ID: <20211013005441.699846-15-sashal@kernel.org> (raw)
In-Reply-To: <20211013005441.699846-1-sashal@kernel.org>

From: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>

[ Upstream commit 030905920f32e91a52794937f67434ac0b3ea41a ]

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>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3bd5d7f96ea1547991ac2ce3137dc2b220bae285.1633464148.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 792eefaf230b..27574f218b37 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 cc51fa52e783..e723ff77cc9b 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


  parent reply	other threads:[~2021-10-13  0:55 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-13  0:54 [PATCH AUTOSEL 5.14 01/17] arm: dts: vexpress-v2p-ca9: Fix the SMB unit-address Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 02/17] ARM: config: multi v7: Enable dependancies Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 03/17] ARM: config: mutli v7: Reenable FB dependency Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 04/17] ARM: dts: at91: sama5d2_som1_ek: disable ISC node by default Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 05/17] block: decode QUEUE_FLAG_HCTX_ACTIVE in debugfs output Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 06/17] xen/x86: prevent PVH type from getting clobbered Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 07/17] r8152: avoid to resubmit rx immediately Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 08/17] drm/amdgpu/display: fix dependencies for DRM_AMD_DC_SI Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 09/17] drm/amdgpu: init iommu after amdkfd device init Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 10/17] xtensa: xtfpga: use CONFIG_USE_OF instead of CONFIG_OF Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 11/17] xtensa: xtfpga: Try software restart before simulating CPU reset Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 12/17] NFSD: Keep existing listeners on portlist error Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 13/17] powerpc/lib: Add helper to check if offset is within conditional branch range Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 14/17] powerpc/bpf: Validate branch ranges Sasha Levin
2021-10-13  0:54 ` Sasha Levin [this message]
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 16/17] powerpc/bpf: Emit stf barrier instruction sequences for BPF_NOSPEC Sasha Levin
2021-10-13  0:54 ` [PATCH AUTOSEL 5.14 17/17] firmware: include drivers/firmware/Kconfig unconditionally Sasha Levin
2021-10-13 11:16   ` Mark Brown

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