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[Linux-stable-mirror] Patch "x86/head: Remove unused 'bad_address' code" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/head: Remove unused 'bad_address' code to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-head-remove-unused-bad_address-code.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From a8b88e84d124bc92c4808e72b8b8c0e0bb538630 Mon Sep 17 00:00:00 2001 From: Josh Poimboeuf <jpoimboe(a)redhat.com> Date: Mon, 18 Sep 2017 21:43:32 -0500 Subject: x86/head: Remove unused 'bad_address' code From: Josh Poimboeuf <jpoimboe(a)redhat.com> commit a8b88e84d124bc92c4808e72b8b8c0e0bb538630 upstream. It's no longer possible for this code to be executed, so remove it. Signed-off-by: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky(a)oracle.com> Cc: Jiri Slaby <jslaby(a)suse.cz> Cc: Juergen Gross <jgross(a)suse.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Link: http://lkml.kernel.org/r/32a46fe92d2083700599b36872b26e7dfd7b7965.150576406… Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/head_64.S | 3 --- 1 file changed, 3 deletions(-) --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -266,9 +266,6 @@ ENDPROC(start_cpu0) .quad init_thread_union + THREAD_SIZE - SIZEOF_PTREGS __FINITDATA -bad_address: - jmp bad_address - __INIT ENTRY(early_idt_handler_array) i = 0 Patches currently in stable-queue which might be from jpoimboe(a)redhat.com are queue-4.14/x86-asm-don-t-use-the-confusing-.ifeq-directive.patch queue-4.14/x86-boot-relocate-definition-of-the-initial-state-of-cr0.patch queue-4.14/objtool-don-t-report-end-of-section-error-after-an-empty-unwind-hint.patch queue-4.14/x86-xen-fix-xen-head-elf-annotations.patch queue-4.14/x86-head-fix-head-elf-function-annotations.patch queue-4.14/objtool-print-top-level-commands-on-incorrect-usage.patch queue-4.14/x86-unwind-rename-unwinder-config-options-to-config_unwinder_.patch queue-4.14/x86-head-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-unused-bad_address-code.patch queue-4.14/x86-xen-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-confusing-comment.patch queue-4.14/x86-unwinder-make-config_unwinder_orc-y-the-default-in-the-64-bit-defconfig.patch queue-4.14/x86-unwind-make-config_unwinder_orc-y-the-default-in-kconfig-for-64-bit.patch queue-4.14/x86-mm-relocate-page-fault-error-codes-to-traps.h.patch queue-4.14/x86-boot-annotate-verify_cpu-as-a-callable-function.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/head: Fix head ELF function annotations" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/head: Fix head ELF function annotations to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-head-fix-head-elf-function-annotations.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 015a2ea5478680fc5216d56b7ff306f2a74efaf9 Mon Sep 17 00:00:00 2001 From: Josh Poimboeuf <jpoimboe(a)redhat.com> Date: Mon, 18 Sep 2017 21:43:33 -0500 Subject: x86/head: Fix head ELF function annotations From: Josh Poimboeuf <jpoimboe(a)redhat.com> commit 015a2ea5478680fc5216d56b7ff306f2a74efaf9 upstream. These functions aren't callable C-type functions, so don't annotate them as such. Signed-off-by: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky(a)oracle.com> Cc: Jiri Slaby <jslaby(a)suse.cz> Cc: Juergen Gross <jgross(a)suse.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Link: http://lkml.kernel.org/r/36eb182738c28514f8bf95e403d89b6413a88883.150576406… Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/head_64.S | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -235,7 +235,7 @@ ENTRY(secondary_startup_64) pushq %rax # target address in negative space lretq .Lafter_lret: -ENDPROC(secondary_startup_64) +END(secondary_startup_64) #include "verify_cpu.S" @@ -278,7 +278,7 @@ ENTRY(early_idt_handler_array) i = i + 1 .fill early_idt_handler_array + i*EARLY_IDT_HANDLER_SIZE - ., 1, 0xcc .endr -ENDPROC(early_idt_handler_array) +END(early_idt_handler_array) early_idt_handler_common: /* @@ -321,7 +321,7 @@ early_idt_handler_common: 20: decl early_recursion_flag(%rip) jmp restore_regs_and_iret -ENDPROC(early_idt_handler_common) +END(early_idt_handler_common) __INITDATA Patches currently in stable-queue which might be from jpoimboe(a)redhat.com are queue-4.14/x86-asm-don-t-use-the-confusing-.ifeq-directive.patch queue-4.14/x86-boot-relocate-definition-of-the-initial-state-of-cr0.patch queue-4.14/objtool-don-t-report-end-of-section-error-after-an-empty-unwind-hint.patch queue-4.14/x86-xen-fix-xen-head-elf-annotations.patch queue-4.14/x86-head-fix-head-elf-function-annotations.patch queue-4.14/objtool-print-top-level-commands-on-incorrect-usage.patch queue-4.14/x86-unwind-rename-unwinder-config-options-to-config_unwinder_.patch queue-4.14/x86-head-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-unused-bad_address-code.patch queue-4.14/x86-xen-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-confusing-comment.patch queue-4.14/x86-unwinder-make-config_unwinder_orc-y-the-default-in-the-64-bit-defconfig.patch queue-4.14/x86-unwind-make-config_unwinder_orc-y-the-default-in-kconfig-for-64-bit.patch queue-4.14/x86-mm-relocate-page-fault-error-codes-to-traps.h.patch queue-4.14/x86-boot-annotate-verify_cpu-as-a-callable-function.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/head: Add unwind hint annotations" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/head: Add unwind hint annotations to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-head-add-unwind-hint-annotations.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 2704fbb672d0d9a19414907fda7949283dcef6a1 Mon Sep 17 00:00:00 2001 From: Josh Poimboeuf <jpoimboe(a)redhat.com> Date: Mon, 18 Sep 2017 21:43:37 -0500 Subject: x86/head: Add unwind hint annotations From: Josh Poimboeuf <jpoimboe(a)redhat.com> commit 2704fbb672d0d9a19414907fda7949283dcef6a1 upstream. Jiri Slaby reported an ORC issue when unwinding from an idle task. The stack was: ffffffff811083c2 do_idle+0x142/0x1e0 ffffffff8110861d cpu_startup_entry+0x5d/0x60 ffffffff82715f58 start_kernel+0x3ff/0x407 ffffffff827153e8 x86_64_start_kernel+0x14e/0x15d ffffffff810001bf secondary_startup_64+0x9f/0xa0 The ORC unwinder errored out at secondary_startup_64 because the head code isn't annotated yet so there wasn't a corresponding ORC entry. Fix that and any other head-related unwinding issues by adding unwind hints to the head code. Reported-by: Jiri Slaby <jslaby(a)suse.cz> Tested-by: Jiri Slaby <jslaby(a)suse.cz> Signed-off-by: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky(a)oracle.com> Cc: Juergen Gross <jgross(a)suse.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Link: http://lkml.kernel.org/r/78ef000a2f68f545d6eef44ee912edceaad82ccf.150576406… Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/Makefile | 1 - arch/x86/kernel/head_64.S | 14 ++++++++++++-- 2 files changed, 12 insertions(+), 3 deletions(-) --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -27,7 +27,6 @@ KASAN_SANITIZE_dumpstack.o := n KASAN_SANITIZE_dumpstack_$(BITS).o := n KASAN_SANITIZE_stacktrace.o := n -OBJECT_FILES_NON_STANDARD_head_$(BITS).o := y OBJECT_FILES_NON_STANDARD_relocate_kernel_$(BITS).o := y OBJECT_FILES_NON_STANDARD_ftrace_$(BITS).o := y OBJECT_FILES_NON_STANDARD_test_nx.o := y --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -50,6 +50,7 @@ L3_START_KERNEL = pud_index(__START_KERN .code64 .globl startup_64 startup_64: + UNWIND_HINT_EMPTY /* * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0, * and someone has loaded an identity mapped page table @@ -89,6 +90,7 @@ startup_64: addq $(early_top_pgt - __START_KERNEL_map), %rax jmp 1f ENTRY(secondary_startup_64) + UNWIND_HINT_EMPTY /* * At this point the CPU runs in 64bit mode CS.L = 1 CS.D = 0, * and someone has loaded a mapped page table. @@ -133,6 +135,7 @@ ENTRY(secondary_startup_64) movq $1f, %rax jmp *%rax 1: + UNWIND_HINT_EMPTY /* Check if nx is implemented */ movl $0x80000001, %eax @@ -247,6 +250,7 @@ END(secondary_startup_64) */ ENTRY(start_cpu0) movq initial_stack(%rip), %rsp + UNWIND_HINT_EMPTY jmp .Ljump_to_C_code ENDPROC(start_cpu0) #endif @@ -271,13 +275,18 @@ ENTRY(early_idt_handler_array) i = 0 .rept NUM_EXCEPTION_VECTORS .ifeq (EXCEPTION_ERRCODE_MASK >> i) & 1 - pushq $0 # Dummy error code, to make stack frame uniform + UNWIND_HINT_IRET_REGS + pushq $0 # Dummy error code, to make stack frame uniform + .else + UNWIND_HINT_IRET_REGS offset=8 .endif pushq $i # 72(%rsp) Vector number jmp early_idt_handler_common + UNWIND_HINT_IRET_REGS i = i + 1 .fill early_idt_handler_array + i*EARLY_IDT_HANDLER_SIZE - ., 1, 0xcc .endr + UNWIND_HINT_IRET_REGS offset=16 END(early_idt_handler_array) early_idt_handler_common: @@ -306,6 +315,7 @@ early_idt_handler_common: pushq %r13 /* pt_regs->r13 */ pushq %r14 /* pt_regs->r14 */ pushq %r15 /* pt_regs->r15 */ + UNWIND_HINT_REGS cmpq $14,%rsi /* Page fault? */ jnz 10f @@ -428,7 +438,7 @@ ENTRY(phys_base) EXPORT_SYMBOL(phys_base) #include "../../x86/xen/xen-head.S" - + __PAGE_ALIGNED_BSS NEXT_PAGE(empty_zero_page) .skip PAGE_SIZE Patches currently in stable-queue which might be from jpoimboe(a)redhat.com are queue-4.14/x86-asm-don-t-use-the-confusing-.ifeq-directive.patch queue-4.14/x86-boot-relocate-definition-of-the-initial-state-of-cr0.patch queue-4.14/objtool-don-t-report-end-of-section-error-after-an-empty-unwind-hint.patch queue-4.14/x86-xen-fix-xen-head-elf-annotations.patch queue-4.14/x86-head-fix-head-elf-function-annotations.patch queue-4.14/objtool-print-top-level-commands-on-incorrect-usage.patch queue-4.14/x86-unwind-rename-unwinder-config-options-to-config_unwinder_.patch queue-4.14/x86-head-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-unused-bad_address-code.patch queue-4.14/x86-xen-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-confusing-comment.patch queue-4.14/x86-unwinder-make-config_unwinder_orc-y-the-default-in-the-64-bit-defconfig.patch queue-4.14/x86-unwind-make-config_unwinder_orc-y-the-default-in-kconfig-for-64-bit.patch queue-4.14/x86-mm-relocate-page-fault-error-codes-to-traps.h.patch queue-4.14/x86-boot-annotate-verify_cpu-as-a-callable-function.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/fpu: Parse clearcpuid= as early XSAVE argument" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/fpu: Parse clearcpuid= as early XSAVE argument to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-fpu-parse-clearcpuid-as-early-xsave-argument.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 0c2a3913d6f50503f7c59d83a6219e39508cc898 Mon Sep 17 00:00:00 2001 From: Andi Kleen <ak(a)linux.intel.com> Date: Fri, 13 Oct 2017 14:56:43 -0700 Subject: x86/fpu: Parse clearcpuid= as early XSAVE argument From: Andi Kleen <ak(a)linux.intel.com> commit 0c2a3913d6f50503f7c59d83a6219e39508cc898 upstream. With a followon patch we want to make clearcpuid affect the XSAVE configuration. But xsave is currently initialized before arguments are parsed. Move the clearcpuid= parsing into the special early xsave argument parsing code. Since clearcpuid= contains a = we need to keep the old __setup around as a dummy, otherwise it would end up as a environment variable in init's environment. Signed-off-by: Andi Kleen <ak(a)linux.intel.com> Reviewed-by: Thomas Gleixner <tglx(a)linutronix.de> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Link: http://lkml.kernel.org/r/20171013215645.23166-4-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/cpu/common.c | 16 +++++++--------- arch/x86/kernel/fpu/init.c | 11 +++++++++++ 2 files changed, 18 insertions(+), 9 deletions(-) --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1301,18 +1301,16 @@ void print_cpu_info(struct cpuinfo_x86 * pr_cont(")\n"); } -static __init int setup_disablecpuid(char *arg) +/* + * clearcpuid= was already parsed in fpu__init_parse_early_param. + * But we need to keep a dummy __setup around otherwise it would + * show up as an environment variable for init. + */ +static __init int setup_clearcpuid(char *arg) { - int bit; - - if (get_option(&arg, &bit) && bit >= 0 && bit < NCAPINTS * 32) - setup_clear_cpu_cap(bit); - else - return 0; - return 1; } -__setup("clearcpuid=", setup_disablecpuid); +__setup("clearcpuid=", setup_clearcpuid); #ifdef CONFIG_X86_64 DEFINE_PER_CPU_FIRST(union irq_stack_union, --- a/arch/x86/kernel/fpu/init.c +++ b/arch/x86/kernel/fpu/init.c @@ -249,6 +249,10 @@ static void __init fpu__init_system_ctx_ */ static void __init fpu__init_parse_early_param(void) { + char arg[32]; + char *argptr = arg; + int bit; + if (cmdline_find_option_bool(boot_command_line, "no387")) setup_clear_cpu_cap(X86_FEATURE_FPU); @@ -266,6 +270,13 @@ static void __init fpu__init_parse_early if (cmdline_find_option_bool(boot_command_line, "noxsaves")) setup_clear_cpu_cap(X86_FEATURE_XSAVES); + + if (cmdline_find_option(boot_command_line, "clearcpuid", arg, + sizeof(arg)) && + get_option(&argptr, &bit) && + bit >= 0 && + bit < NCAPINTS * 32) + setup_clear_cpu_cap(bit); } /* Patches currently in stable-queue which might be from ak(a)linux.intel.com are queue-4.14/bitops-add-clear-set_bit32-to-linux-bitops.h.patch queue-4.14/x86-fpu-remove-the-explicit-clearing-of-xsave-dependent-features.patch queue-4.14/x86-cpuid-add-generic-table-for-cpuid-dependencies.patch queue-4.14/x86-cpuid-prevent-out-of-bound-access-in-do_clear_cpu_cap.patch queue-4.14/x86-fpu-parse-clearcpuid-as-early-xsave-argument.patch queue-4.14/x86-fpu-make-xsave-check-the-base-cpuid-features-before-enabling.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/fpu: Remove the explicit clearing of XSAVE dependent features" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/fpu: Remove the explicit clearing of XSAVE dependent features to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-fpu-remove-the-explicit-clearing-of-xsave-dependent-features.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 73e3a7d2a7c3be29a5a22b85026f6cfa5664267f Mon Sep 17 00:00:00 2001 From: Andi Kleen <ak(a)linux.intel.com> Date: Fri, 13 Oct 2017 14:56:45 -0700 Subject: x86/fpu: Remove the explicit clearing of XSAVE dependent features From: Andi Kleen <ak(a)linux.intel.com> commit 73e3a7d2a7c3be29a5a22b85026f6cfa5664267f upstream. Clearing a CPU feature with setup_clear_cpu_cap() clears all features which depend on it. Expressing feature dependencies in one place is easier to maintain than keeping functions like fpu__xstate_clear_all_cpu_caps() up to date. The features which depend on XSAVE have their dependency expressed in the dependency table, so its sufficient to clear X86_FEATURE_XSAVE. Remove the explicit clearing of XSAVE dependent features. Signed-off-by: Andi Kleen <ak(a)linux.intel.com> Reviewed-by: Thomas Gleixner <tglx(a)linutronix.de> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Link: http://lkml.kernel.org/r/20171013215645.23166-6-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/fpu/xstate.c | 20 -------------------- 1 file changed, 20 deletions(-) --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -73,26 +73,6 @@ unsigned int fpu_user_xstate_size; void fpu__xstate_clear_all_cpu_caps(void) { setup_clear_cpu_cap(X86_FEATURE_XSAVE); - setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT); - setup_clear_cpu_cap(X86_FEATURE_XSAVEC); - setup_clear_cpu_cap(X86_FEATURE_XSAVES); - setup_clear_cpu_cap(X86_FEATURE_AVX); - setup_clear_cpu_cap(X86_FEATURE_AVX2); - setup_clear_cpu_cap(X86_FEATURE_AVX512F); - setup_clear_cpu_cap(X86_FEATURE_AVX512IFMA); - setup_clear_cpu_cap(X86_FEATURE_AVX512PF); - setup_clear_cpu_cap(X86_FEATURE_AVX512ER); - setup_clear_cpu_cap(X86_FEATURE_AVX512CD); - setup_clear_cpu_cap(X86_FEATURE_AVX512DQ); - setup_clear_cpu_cap(X86_FEATURE_AVX512BW); - setup_clear_cpu_cap(X86_FEATURE_AVX512VL); - setup_clear_cpu_cap(X86_FEATURE_MPX); - setup_clear_cpu_cap(X86_FEATURE_XGETBV1); - setup_clear_cpu_cap(X86_FEATURE_AVX512VBMI); - setup_clear_cpu_cap(X86_FEATURE_PKU); - setup_clear_cpu_cap(X86_FEATURE_AVX512_4VNNIW); - setup_clear_cpu_cap(X86_FEATURE_AVX512_4FMAPS); - setup_clear_cpu_cap(X86_FEATURE_AVX512_VPOPCNTDQ); } /* Patches currently in stable-queue which might be from ak(a)linux.intel.com are queue-4.14/bitops-add-clear-set_bit32-to-linux-bitops.h.patch queue-4.14/x86-fpu-remove-the-explicit-clearing-of-xsave-dependent-features.patch queue-4.14/x86-cpuid-add-generic-table-for-cpuid-dependencies.patch queue-4.14/x86-cpuid-prevent-out-of-bound-access-in-do_clear_cpu_cap.patch queue-4.14/x86-fpu-parse-clearcpuid-as-early-xsave-argument.patch queue-4.14/x86-fpu-make-xsave-check-the-base-cpuid-features-before-enabling.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/fpu: Make XSAVE check the base CPUID features before enabling" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/fpu: Make XSAVE check the base CPUID features before enabling to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-fpu-make-xsave-check-the-base-cpuid-features-before-enabling.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From ccb18db2ab9d923df07e7495123fe5fb02329713 Mon Sep 17 00:00:00 2001 From: Andi Kleen <ak(a)linux.intel.com> Date: Fri, 13 Oct 2017 14:56:44 -0700 Subject: x86/fpu: Make XSAVE check the base CPUID features before enabling From: Andi Kleen <ak(a)linux.intel.com> commit ccb18db2ab9d923df07e7495123fe5fb02329713 upstream. Before enabling XSAVE, not only check the XSAVE specific CPUID bits, but also the base CPUID features of the respective XSAVE feature. This allows to disable individual XSAVE states using the existing clearcpuid= option, which can be useful for performance testing and debugging, and also in general avoids inconsistencies. Signed-off-by: Andi Kleen <ak(a)linux.intel.com> Reviewed-by: Thomas Gleixner <tglx(a)linutronix.de> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Link: http://lkml.kernel.org/r/20171013215645.23166-5-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/fpu/xstate.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -15,6 +15,7 @@ #include <asm/fpu/xstate.h> #include <asm/tlbflush.h> +#include <asm/cpufeature.h> /* * Although we spell it out in here, the Processor Trace @@ -36,6 +37,19 @@ static const char *xfeature_names[] = "unknown xstate feature" , }; +static short xsave_cpuid_features[] __initdata = { + X86_FEATURE_FPU, + X86_FEATURE_XMM, + X86_FEATURE_AVX, + X86_FEATURE_MPX, + X86_FEATURE_MPX, + X86_FEATURE_AVX512F, + X86_FEATURE_AVX512F, + X86_FEATURE_AVX512F, + X86_FEATURE_INTEL_PT, + X86_FEATURE_PKU, +}; + /* * Mask of xstate features supported by the CPU and the kernel: */ @@ -726,6 +740,7 @@ void __init fpu__init_system_xstate(void unsigned int eax, ebx, ecx, edx; static int on_boot_cpu __initdata = 1; int err; + int i; WARN_ON_FPU(!on_boot_cpu); on_boot_cpu = 0; @@ -759,6 +774,14 @@ void __init fpu__init_system_xstate(void goto out_disable; } + /* + * Clear XSAVE features that are disabled in the normal CPUID. + */ + for (i = 0; i < ARRAY_SIZE(xsave_cpuid_features); i++) { + if (!boot_cpu_has(xsave_cpuid_features[i])) + xfeatures_mask &= ~BIT(i); + } + xfeatures_mask &= fpu__get_supported_xfeatures_mask(); /* Enable xstate instructions to be able to continue with initialization: */ Patches currently in stable-queue which might be from ak(a)linux.intel.com are queue-4.14/bitops-add-clear-set_bit32-to-linux-bitops.h.patch queue-4.14/x86-fpu-remove-the-explicit-clearing-of-xsave-dependent-features.patch queue-4.14/x86-cpuid-add-generic-table-for-cpuid-dependencies.patch queue-4.14/x86-cpuid-prevent-out-of-bound-access-in-do_clear_cpu_cap.patch queue-4.14/x86-fpu-parse-clearcpuid-as-early-xsave-argument.patch queue-4.14/x86-fpu-make-xsave-check-the-base-cpuid-features-before-enabling.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/fpu/debug: Remove unused 'x86_fpu_state' and 'x86_fpu_deactivate_state' tracepoints" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/fpu/debug: Remove unused 'x86_fpu_state' and 'x86_fpu_deactivate_state' tracepoints to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-fpu-debug-remove-unused-x86_fpu_state-and-x86_fpu_deactivate_state-tracepoints.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From 127a1bea40f7f2a36bc7207ea4d51bb6b4e936fa Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (VMware)" <rostedt(a)goodmis.org> Date: Thu, 12 Oct 2017 18:06:19 -0400 Subject: x86/fpu/debug: Remove unused 'x86_fpu_state' and 'x86_fpu_deactivate_state' tracepoints From: Steven Rostedt (VMware) <rostedt(a)goodmis.org> commit 127a1bea40f7f2a36bc7207ea4d51bb6b4e936fa upstream. Commit: d1898b733619 ("x86/fpu: Add tracepoints to dump FPU state at key points") ... added the 'x86_fpu_state' and 'x86_fpu_deactivate_state' trace points, but never used them. Today they are still not used. As they take up and waste memory, remove them. Signed-off-by: Steven Rostedt (VMware) <rostedt(a)goodmis.org> Cc: Dave Hansen <dave.hansen(a)linux.intel.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Link: http://lkml.kernel.org/r/20171012180619.670b68b6@gandalf.local.home Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/include/asm/trace/fpu.h | 10 ---------- 1 file changed, 10 deletions(-) --- a/arch/x86/include/asm/trace/fpu.h +++ b/arch/x86/include/asm/trace/fpu.h @@ -34,11 +34,6 @@ DECLARE_EVENT_CLASS(x86_fpu, ) ); -DEFINE_EVENT(x86_fpu, x86_fpu_state, - TP_PROTO(struct fpu *fpu), - TP_ARGS(fpu) -); - DEFINE_EVENT(x86_fpu, x86_fpu_before_save, TP_PROTO(struct fpu *fpu), TP_ARGS(fpu) @@ -73,11 +68,6 @@ DEFINE_EVENT(x86_fpu, x86_fpu_activate_s TP_PROTO(struct fpu *fpu), TP_ARGS(fpu) ); - -DEFINE_EVENT(x86_fpu, x86_fpu_deactivate_state, - TP_PROTO(struct fpu *fpu), - TP_ARGS(fpu) -); DEFINE_EVENT(x86_fpu, x86_fpu_init_state, TP_PROTO(struct fpu *fpu), Patches currently in stable-queue which might be from rostedt(a)goodmis.org are queue-4.14/tracing-exclude-generic-fields-from-histograms.patch queue-4.14/x86-fpu-debug-remove-unused-x86_fpu_state-and-x86_fpu_deactivate_state-tracepoints.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/build: Beautify build log of syscall headers" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/build: Beautify build log of syscall headers to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-build-beautify-build-log-of-syscall-headers.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From af8e947079a7dab0480b5d6db6b093fd04b86fc9 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada <yamada.masahiro(a)socionext.com> Date: Fri, 27 Oct 2017 13:11:10 +0900 Subject: x86/build: Beautify build log of syscall headers From: Masahiro Yamada <yamada.masahiro(a)socionext.com> commit af8e947079a7dab0480b5d6db6b093fd04b86fc9 upstream. This makes the build log look nicer. Before: SYSTBL arch/x86/entry/syscalls/../../include/generated/asm/syscalls_32.h SYSHDR arch/x86/entry/syscalls/../../include/generated/asm/unistd_32_ia32.h SYSHDR arch/x86/entry/syscalls/../../include/generated/asm/unistd_64_x32.h SYSTBL arch/x86/entry/syscalls/../../include/generated/asm/syscalls_64.h SYSHDR arch/x86/entry/syscalls/../../include/generated/uapi/asm/unistd_32.h SYSHDR arch/x86/entry/syscalls/../../include/generated/uapi/asm/unistd_64.h SYSHDR arch/x86/entry/syscalls/../../include/generated/uapi/asm/unistd_x32.h After: SYSTBL arch/x86/include/generated/asm/syscalls_32.h SYSHDR arch/x86/include/generated/asm/unistd_32_ia32.h SYSHDR arch/x86/include/generated/asm/unistd_64_x32.h SYSTBL arch/x86/include/generated/asm/syscalls_64.h SYSHDR arch/x86/include/generated/uapi/asm/unistd_32.h SYSHDR arch/x86/include/generated/uapi/asm/unistd_64.h SYSHDR arch/x86/include/generated/uapi/asm/unistd_x32.h Signed-off-by: Masahiro Yamada <yamada.masahiro(a)socionext.com> Acked-by: Thomas Gleixner <tglx(a)linutronix.de> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: linux-kbuild(a)vger.kernel.org Link: http://lkml.kernel.org/r/1509077470-2735-1-git-send-email-yamada.masahiro@s… Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/entry/syscalls/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/x86/entry/syscalls/Makefile +++ b/arch/x86/entry/syscalls/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 -out := $(obj)/../../include/generated/asm -uapi := $(obj)/../../include/generated/uapi/asm +out := arch/$(SRCARCH)/include/generated/asm +uapi := arch/$(SRCARCH)/include/generated/uapi/asm # Create output directory if not already present _dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') \ Patches currently in stable-queue which might be from yamada.masahiro(a)socionext.com are queue-4.14/x86-build-beautify-build-log-of-syscall-headers.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/boot: Relocate definition of the initial state of CR0" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/boot: Relocate definition of the initial state of CR0 to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-boot-relocate-definition-of-the-initial-state-of-cr0.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From b0ce5b8c95c83a7b98c679b117e3d6ae6f97154b Mon Sep 17 00:00:00 2001 From: Ricardo Neri <ricardo.neri-calderon(a)linux.intel.com> Date: Fri, 27 Oct 2017 13:25:29 -0700 Subject: x86/boot: Relocate definition of the initial state of CR0 From: Ricardo Neri <ricardo.neri-calderon(a)linux.intel.com> commit b0ce5b8c95c83a7b98c679b117e3d6ae6f97154b upstream. Both head_32.S and head_64.S utilize the same value to initialize the control register CR0. Also, other parts of the kernel might want to access this initial definition (e.g., emulation code for User-Mode Instruction Prevention uses this state to provide a sane dummy value for CR0 when emulating the smsw instruction). Thus, relocate this definition to a header file from which it can be conveniently accessed. Suggested-by: Borislav Petkov <bp(a)alien8.de> Signed-off-by: Ricardo Neri <ricardo.neri-calderon(a)linux.intel.com> Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Reviewed-by: Borislav Petkov <bp(a)suse.de> Reviewed-by: Andy Lutomirski <luto(a)kernel.org> Cc: "Michael S. Tsirkin" <mst(a)redhat.com> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Dave Hansen <dave.hansen(a)linux.intel.com> Cc: ricardo.neri(a)intel.com Cc: linux-mm(a)kvack.org Cc: Paul Gortmaker <paul.gortmaker(a)windriver.com> Cc: Huang Rui <ray.huang(a)amd.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: linux-arch(a)vger.kernel.org Cc: Jonathan Corbet <corbet(a)lwn.net> Cc: Jiri Slaby <jslaby(a)suse.cz> Cc: "Ravi V. Shankar" <ravi.v.shankar(a)intel.com> Cc: Denys Vlasenko <dvlasenk(a)redhat.com> Cc: Chris Metcalf <cmetcalf(a)mellanox.com> Cc: Brian Gerst <brgerst(a)gmail.com> Cc: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Chen Yucong <slaoub(a)gmail.com> Cc: Vlastimil Babka <vbabka(a)suse.cz> Cc: Dave Hansen <dave.hansen(a)intel.com> Cc: Andy Lutomirski <luto(a)amacapital.net> Cc: Masami Hiramatsu <mhiramat(a)kernel.org> Cc: Paolo Bonzini <pbonzini(a)redhat.com> Cc: Andrew Morton <akpm(a)linux-foundation.org> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Link: https://lkml.kernel.org/r/1509135945-13762-3-git-send-email-ricardo.neri-ca… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/include/uapi/asm/processor-flags.h | 3 +++ arch/x86/kernel/head_32.S | 3 --- arch/x86/kernel/head_64.S | 3 --- 3 files changed, 3 insertions(+), 6 deletions(-) --- a/arch/x86/include/uapi/asm/processor-flags.h +++ b/arch/x86/include/uapi/asm/processor-flags.h @@ -152,5 +152,8 @@ #define CX86_ARR_BASE 0xc4 #define CX86_RCR_BASE 0xdc +#define CR0_STATE (X86_CR0_PE | X86_CR0_MP | X86_CR0_ET | \ + X86_CR0_NE | X86_CR0_WP | X86_CR0_AM | \ + X86_CR0_PG) #endif /* _UAPI_ASM_X86_PROCESSOR_FLAGS_H */ --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -212,9 +212,6 @@ ENTRY(startup_32_smp) #endif .Ldefault_entry: -#define CR0_STATE (X86_CR0_PE | X86_CR0_MP | X86_CR0_ET | \ - X86_CR0_NE | X86_CR0_WP | X86_CR0_AM | \ - X86_CR0_PG) movl $(CR0_STATE & ~X86_CR0_PG),%eax movl %eax,%cr0 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -154,9 +154,6 @@ ENTRY(secondary_startup_64) 1: wrmsr /* Make changes effective */ /* Setup cr0 */ -#define CR0_STATE (X86_CR0_PE | X86_CR0_MP | X86_CR0_ET | \ - X86_CR0_NE | X86_CR0_WP | X86_CR0_AM | \ - X86_CR0_PG) movl $CR0_STATE, %eax /* Make changes effective */ movq %rax, %cr0 Patches currently in stable-queue which might be from ricardo.neri-calderon(a)linux.intel.com are queue-4.14/x86-boot-relocate-definition-of-the-initial-state-of-cr0.patch queue-4.14/ptrace-x86-make-user_64bit_mode-available-to-32-bit-builds.patch queue-4.14/x86-mm-relocate-page-fault-error-codes-to-traps.h.patch

6 years, 9 months

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[Linux-stable-mirror] Patch "x86/boot: Annotate verify_cpu() as a callable function" has been added to the 4.14-stable tree

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled x86/boot: Annotate verify_cpu() as a callable function to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… The filename of the patch is: x86-boot-annotate-verify_cpu-as-a-callable-function.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable(a)vger.kernel.org> know about it. >From e93db75a0054b23a874a12c63376753544f3fe9e Mon Sep 17 00:00:00 2001 From: Josh Poimboeuf <jpoimboe(a)redhat.com> Date: Mon, 18 Sep 2017 21:43:34 -0500 Subject: x86/boot: Annotate verify_cpu() as a callable function From: Josh Poimboeuf <jpoimboe(a)redhat.com> commit e93db75a0054b23a874a12c63376753544f3fe9e upstream. verify_cpu() is a callable function. Annotate it as such. Signed-off-by: Josh Poimboeuf <jpoimboe(a)redhat.com> Cc: Andy Lutomirski <luto(a)kernel.org> Cc: Boris Ostrovsky <boris.ostrovsky(a)oracle.com> Cc: Jiri Slaby <jslaby(a)suse.cz> Cc: Juergen Gross <jgross(a)suse.com> Cc: Linus Torvalds <torvalds(a)linux-foundation.org> Cc: Peter Zijlstra <peterz(a)infradead.org> Cc: Thomas Gleixner <tglx(a)linutronix.de> Link: http://lkml.kernel.org/r/293024b8a080832075312f38c07ccc970fc70292.150576406… Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> --- arch/x86/kernel/verify_cpu.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/x86/kernel/verify_cpu.S +++ b/arch/x86/kernel/verify_cpu.S @@ -33,7 +33,7 @@ #include <asm/cpufeatures.h> #include <asm/msr-index.h> -verify_cpu: +ENTRY(verify_cpu) pushf # Save caller passed flags push $0 # Kill any dangerous flags popf @@ -139,3 +139,4 @@ verify_cpu: popf # Restore caller passed flags xorl %eax, %eax ret +ENDPROC(verify_cpu) Patches currently in stable-queue which might be from jpoimboe(a)redhat.com are queue-4.14/x86-asm-don-t-use-the-confusing-.ifeq-directive.patch queue-4.14/x86-boot-relocate-definition-of-the-initial-state-of-cr0.patch queue-4.14/objtool-don-t-report-end-of-section-error-after-an-empty-unwind-hint.patch queue-4.14/x86-xen-fix-xen-head-elf-annotations.patch queue-4.14/x86-head-fix-head-elf-function-annotations.patch queue-4.14/objtool-print-top-level-commands-on-incorrect-usage.patch queue-4.14/x86-unwind-rename-unwinder-config-options-to-config_unwinder_.patch queue-4.14/x86-head-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-unused-bad_address-code.patch queue-4.14/x86-xen-add-unwind-hint-annotations.patch queue-4.14/x86-head-remove-confusing-comment.patch queue-4.14/x86-unwinder-make-config_unwinder_orc-y-the-default-in-the-64-bit-defconfig.patch queue-4.14/x86-unwind-make-config_unwinder_orc-y-the-default-in-kconfig-for-64-bit.patch queue-4.14/x86-mm-relocate-page-fault-error-codes-to-traps.h.patch queue-4.14/x86-boot-annotate-verify_cpu-as-a-callable-function.patch

6 years, 9 months

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