87 lines
3.1 KiB
Diff
87 lines
3.1 KiB
Diff
This makes the Linux kernel build as ELFv2 on big endian ppc64. The upstream
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doesn't seem to be interested in this but it's a small patch that is unlikely
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to break/easy to remake and in worst case can always be ditched.
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Using ELFv2 has some potential performance benefits and is already always used
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on little endian. It requires a relatively modern toolchain, which we already
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have.
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Ping q66 if it does not apply.
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--- a/arch/powerpc/Makefile 2020-01-05 14:40:50.395763093 +0100
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+++ b/arch/powerpc/Makefile 2020-01-05 14:48:39.025251092 +0100
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@@ -92,10 +92,8 @@
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ifdef CONFIG_PPC64
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ifndef CONFIG_CC_IS_CLANG
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-cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
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-cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
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-aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
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-aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
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+cflags-y += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
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+aflags-y += $(call cc-option,-mabi=elfv2,$(call cc-option,-mabi=elfv1))
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endif
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endif
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@@ -144,14 +142,8 @@
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CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
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ifndef CONFIG_CC_IS_CLANG
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-ifdef CONFIG_CPU_LITTLE_ENDIAN
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
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-AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
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-else
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-CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
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-CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
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-AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
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-endif
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+AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mabi=elfv1))
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endif
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
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CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
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--- a/arch/powerpc/boot/Makefile
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+++ b/arch/powerpc/boot/Makefile
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@@ -48,8 +48,8 @@ ifdef CONFIG_CPU_BIG_ENDIAN
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BOOTCFLAGS += -mbig-endian
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else
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BOOTCFLAGS += -mlittle-endian
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-BOOTCFLAGS += $(call cc-option,-mabi=elfv2)
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endif
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+BOOTCFLAGS += $(call cc-option,-mabi=elfv2)
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BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
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--- a/drivers/crypto/vmx/Makefile 2020-01-01 10:56:10.560965046 +0100
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+++ b/drivers/crypto/vmx/Makefile 2020-01-01 10:57:05.189968856 +0100
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@@ -5,7 +5,7 @@
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ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
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override flavour := linux-ppc64le
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else
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-override flavour := linux-ppc64
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+override flavour := linux-ppc64v2
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endif
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quiet_cmd_perl = PERL $@
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--- a/drivers/crypto/vmx/ppc-xlate.pl
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+++ b/drivers/crypto/vmx/ppc-xlate.pl
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@@ -40,7 +40,7 @@ my $globl = sub {
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};
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my $text = sub {
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my $ret = ($flavour =~ /aix/) ? ".csect\t.text[PR],7" : ".text";
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- $ret = ".abiversion 2\n".$ret if ($flavour =~ /linux.*64le/);
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+ $ret = ".abiversion 2\n".$ret if ($flavour =~ /linux.*64(le|v2)/);
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$ret;
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};
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my $machine = sub {
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@@ -142,7 +142,7 @@ my $vmr = sub {
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# Some ABIs specify vrsave, special-purpose register #256, as reserved
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# for system use.
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-my $no_vrsave = ($flavour =~ /linux-ppc64le/);
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+my $no_vrsave = ($flavour =~ /linux-ppc64(le|v2)/);
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my $mtspr = sub {
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my ($f,$idx,$ra) = @_;
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if ($idx == 256 && $no_vrsave) {
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