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drm/amd/display: only use hard-float, not altivec on powerpc
The compiler flags enable altivec, but that is not required; hard-float is sufficient for the code to build and function. Drop altivec from the compiler flags and adjust the enable/disable code to only enable FPU use. Link: https://lkml.kernel.org/r/20240329072441.591471-13-samuel.holland@sifive.com Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nicolas Schier <nicolas@fjasle.eu> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: WANG Xuerui <git@xen0n.name> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -92,11 +92,7 @@ void dc_fpu_begin(const char *function_name, const int line)
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#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH)
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kernel_fpu_begin();
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#elif defined(CONFIG_PPC64)
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if (cpu_has_feature(CPU_FTR_VSX_COMP))
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enable_kernel_vsx();
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else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP))
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enable_kernel_altivec();
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else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE))
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if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE))
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enable_kernel_fp();
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#elif defined(CONFIG_ARM64)
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kernel_neon_begin();
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@ -125,11 +121,7 @@ void dc_fpu_end(const char *function_name, const int line)
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#if defined(CONFIG_X86) || defined(CONFIG_LOONGARCH)
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kernel_fpu_end();
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#elif defined(CONFIG_PPC64)
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if (cpu_has_feature(CPU_FTR_VSX_COMP))
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disable_kernel_vsx();
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else if (cpu_has_feature(CPU_FTR_ALTIVEC_COMP))
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disable_kernel_altivec();
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else if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE))
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if (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE))
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disable_kernel_fp();
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#elif defined(CONFIG_ARM64)
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kernel_neon_end();
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@ -31,7 +31,7 @@ dml_ccflags := $(dml_ccflags-y) -msse
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endif
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ifdef CONFIG_PPC64
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dml_ccflags := -mhard-float -maltivec
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dml_ccflags := -mhard-float
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endif
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ifdef CONFIG_ARM64
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@ -30,7 +30,7 @@ dml2_ccflags := $(dml2_ccflags-y) -msse
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endif
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ifdef CONFIG_PPC64
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dml2_ccflags := -mhard-float -maltivec
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dml2_ccflags := -mhard-float
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endif
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ifdef CONFIG_ARM64
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