powerpc/64: Call setup_barrier_nospec() from setup_arch()

commit af375eefbfb27cbb5b831984e66d724a40d26b5c upstream.

Currently we require platform code to call setup_barrier_nospec(). But
if we add an empty definition for the !CONFIG_PPC_BARRIER_NOSPEC case
then we can call it in setup_arch().

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/include/asm/setup.h b/arch/powerpc/include/asm/setup.h
index 38525bd..d3e9da6 100644 (file)
--- a/arch/powerpc/include/asm/setup.h
+++ b/arch/powerpc/include/asm/setup.h
@@ -51,7 +51,11 @@ enum l1d_flush_type {
 
 void setup_rfi_flush(enum l1d_flush_type, bool enable);
 void do_rfi_flush_fixups(enum l1d_flush_type types);
+#ifdef CONFIG_PPC_BARRIER_NOSPEC
 void setup_barrier_nospec(void);
+#else
+static inline void setup_barrier_nospec(void) { };
+#endif
 void do_barrier_nospec_fixups(bool enable);
 extern bool barrier_nospec_enabled;
 

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index bf0f712..d5a128f 100644 (file)
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -918,6 +918,8 @@ void __init setup_arch(char **cmdline_p)
        if (ppc_md.setup_arch)
                ppc_md.setup_arch();
 
+       setup_barrier_nospec();
+
        paging_init();
 
        /* Initialize the MMU context management stuff. */

diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index eb54646..17203ab 100644 (file)
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -123,7 +123,6 @@ static void pnv_setup_rfi_flush(void)
                  security_ftr_enabled(SEC_FTR_L1D_FLUSH_HV));
 
        setup_rfi_flush(type, enable);
-       setup_barrier_nospec();
 }
 
 static void __init pnv_setup_arch(void)

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 2b2759c..91ade77 100644 (file)
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -525,7 +525,6 @@ void pseries_setup_rfi_flush(void)
                 security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR);
 
        setup_rfi_flush(types, enable);
-       setup_barrier_nospec();
 }
 
 static void __init pSeries_setup_arch(void)