search for: cpufeatur

...Use boot_cpu_has() instead. Signed-off-by: Borislav Petkov <bp at suse.de> Cc: virtualization at lists.linux-foundation.org Cc: sparmaintainer at unisys.com --- arch/x86/events/intel/cstate.c | 2 +- arch/x86/events/intel/uncore.c | 2 +- arch/x86/include/asm/cpufeature.h | 1 - arch/x86/kernel/cpu/vmware.c | 2 +- arch/x86/kernel/kvm.c | 2 +- drivers/staging/unisys/visorbus/visorchipset.c | 2 +- 6 files changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events...

...Use boot_cpu_has() instead. Signed-off-by: Borislav Petkov <bp at suse.de> Cc: virtualization at lists.linux-foundation.org Cc: sparmaintainer at unisys.com --- arch/x86/events/intel/cstate.c | 2 +- arch/x86/events/intel/uncore.c | 2 +- arch/x86/include/asm/cpufeature.h | 1 - arch/x86/kernel/cpu/vmware.c | 2 +- arch/x86/kernel/kvm.c | 2 +- drivers/staging/unisys/visorbus/visorchipset.c | 2 +- 6 files changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events...

...ted Virtualization with Encrypted State. This feature enhances SEV by also encrypting the guest register state, making it in-accessible to the hypervisor. Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/kernel/cpu/amd.c | 4 +++- arch/x86/kernel/cpu/scattered.c | 1 + 3 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index f3327cb56edf..26e4ee209f7b 100644 --- a/arch/x86/include/asm/...

...ted Virtualization with Encrypted State. This feature enhances SEV by also encrypting the guest register state, making it in-accessible to the hypervisor. Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com> Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/kernel/cpu/amd.c | 3 ++- arch/x86/kernel/cpu/scattered.c | 1 + 3 files changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index db189945e9b0..ade59fca283a 100644 --- a/arch/x86/include/asm/c...

CPUID level 0x00000007:0 (ebx) is word 9, instead of word 7. ... make it consistent with native Linux. Signed-off-by: Li Xin <xin.li@intel.com> diff -r d7c755c25bb9 xen/include/asm-x86/cpufeature.h --- a/xen/include/asm-x86/cpufeature.h Sat May 28 08:58:08 2011 +0100 +++ b/xen/include/asm-x86/cpufeature.h Tue May 31 07:34:34 2011 +0800 @@ -142,7 +142,7 @@ #define X86_FEATURE_TOPOEXT (6*32+22) /* topology extensions CPUID leafs */ /* Intel-defined CPU features, CPUID level 0x000000...

..._XENPV > jz .Lsyscall_32_done Could we make this a little less subtle: ALTERNATIVE "testl %eax, %eax; lz .Lsyscall_32_done", "jmp .Lsyscasll_32_done", X86_FEATURE_XENPV Borislav, what do you think? Ditto for the others. > diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h > index e4f8010..0e4fe5b 100644 > --- a/arch/x86/include/asm/cpufeature.h > +++ b/arch/x86/include/asm/cpufeature.h > @@ -216,6 +216,7 @@ > #define X86_FEATURE_PAUSEFILTER ( 8*32+13) /* AMD filtered pause intercept */ > #define X86_FEATURE_...

..._XENPV > jz .Lsyscall_32_done Could we make this a little less subtle: ALTERNATIVE "testl %eax, %eax; lz .Lsyscall_32_done", "jmp .Lsyscasll_32_done", X86_FEATURE_XENPV Borislav, what do you think? Ditto for the others. > diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h > index e4f8010..0e4fe5b 100644 > --- a/arch/x86/include/asm/cpufeature.h > +++ b/arch/x86/include/asm/cpufeature.h > @@ -216,6 +216,7 @@ > #define X86_FEATURE_PAUSEFILTER ( 8*32+13) /* AMD filtered pause intercept */ > #define X86_FEATURE_...

...usergs_sysret32 paravirt op (in the subsequent patch) Signed-off-by: Boris Ostrovsky <boris.ostrovsky at oracle.com> Suggested-by: Andy Lutomirski <luto at amacapital.net> --- arch/x86/entry/entry_32.S | 3 ++- arch/x86/entry/entry_64_compat.S | 6 ++++-- arch/x86/include/asm/cpufeature.h | 1 + arch/x86/xen/enlighten.c | 4 +++- 4 files changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index 3eb572e..901f186 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -308,7 +308,8 @@ sysenter_past...

...Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com> Suggested-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Liu Jinsong <jinsong.liu@intel.com> --- xen/arch/x86/hvm/hvm.c | 6 ++++++ xen/arch/x86/hvm/vmx/vmcs.c | 8 ++++++-- xen/include/asm-x86/cpufeature.h | 2 ++ xen/include/asm-x86/hvm/vmx/vmcs.h | 2 ++ xen/include/asm-x86/msr-index.h | 2 ++ 5 files changed, 18 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c index 9c88c73..0f7178b 100644 --- a/xen/arch/x86/hvm/hvm.c +++ b/xen/arch/x86/h...

...bits. But this will break kvm in cpus that don't have those instructions (which includes my laptop). So we fixup our cpuid before exposing it to the guest. Signed-off-by: Glauber Costa <gcosta at redhat.com> --- arch/x86/kvm/x86.c | 22 ++++++++++++++++++---- include/asm-x86/cpufeature.h | 2 ++ 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 979f983..e79fcd5 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -919,7 +919,7 @@ static int is_efer_nx(void) return efer & EFER_NX; } -static void cpuid_...

...bits. But this will break kvm in cpus that don't have those instructions (which includes my laptop). So we fixup our cpuid before exposing it to the guest. Signed-off-by: Glauber Costa <gcosta at redhat.com> --- arch/x86/kvm/x86.c | 22 ++++++++++++++++++---- include/asm-x86/cpufeature.h | 2 ++ 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 979f983..e79fcd5 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -919,7 +919,7 @@ static int is_efer_nx(void) return efer & EFER_NX; } -static void cpuid_...

...(3): x86/xen: Avoid fast syscall path for Xen PV guests x86: irq_enable_sysexit pv op is no longer needed x86: usergs_sysret32 pv op is no longer needed arch/x86/entry/entry_32.S | 11 ++++------- arch/x86/entry/entry_64_compat.S | 16 ++++++---------- arch/x86/include/asm/cpufeature.h | 1 + arch/x86/include/asm/paravirt.h | 12 ------------ arch/x86/include/asm/paravirt_types.h | 17 ----------------- arch/x86/kernel/asm-offsets.c | 3 --- arch/x86/kernel/asm-offsets_64.c | 1 - arch/x86/kernel/paravirt.c | 12 ------------ arch/x86/kerne...

...(3): x86/xen: Avoid fast syscall path for Xen PV guests x86: irq_enable_sysexit pv op is no longer needed x86: usergs_sysret32 pv op is no longer needed arch/x86/entry/entry_32.S | 11 ++++------- arch/x86/entry/entry_64_compat.S | 16 ++++++---------- arch/x86/include/asm/cpufeature.h | 1 + arch/x86/include/asm/paravirt.h | 12 ------------ arch/x86/include/asm/paravirt_types.h | 17 ----------------- arch/x86/kernel/asm-offsets.c | 3 --- arch/x86/kernel/asm-offsets_64.c | 1 - arch/x86/kernel/paravirt.c | 12 ------------ arch/x86/kerne...

...} + else if ( regs->eax == 0x80000001 ) + { + /* Modify Feature Information. */ + clear_bit(X86_FEATURE_RDTSCP % 32, &d); + } else { (void)cpuid_hypervisor_leaves(regs->eax, &a, &b, &c, &d); Index: 2007-01-16/xen/include/asm-x86/cpufeature.h =================================================================== --- 2007-01-16.orig/xen/include/asm-x86/cpufeature.h 2006-04-24 15:28:58.000000000 +0200 +++ 2007-01-16/xen/include/asm-x86/cpufeature.h 2007-02-01 17:25:15.000000000 +0100 @@ -49,6 +49,7 @@ #define X86_FEATURE_MP (1*32+19) /*...

...TPR % 32, &c); __clear_bit(X86_FEATURE_PDCM % 32, &c); __clear_bit(X86_FEATURE_DCA % 32, &c); + __set_bit(X86_FEATURE_HYPERVISOR % 32, &c); break; case 0x80000001: /* Modify Feature Information. */ Index: 2008-10-27/xen/include/asm-x86/cpufeature.h =================================================================== --- 2008-10-27.orig/xen/include/asm-x86/cpufeature.h 2008-05-07 12:21:37.000000000 +0200 +++ 2008-10-27/xen/include/asm-x86/cpufeature.h 2008-11-19 10:15:13.000000000 +0100 @@ -94,6 +94,7 @@ #define X86_FEATURE_SSE4_2 (4*32+20)...

Revert the following commits: - 5bdcd510c2ac9efaf55c4cbd8d46421d8e2320cd ("x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs") - d5a581d84ae6b8a4a740464b80d8d9cf1e7947b2 ("x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs") - 0474d5d9d2f7f3b11262f7bf87d0e7314ead9200. ("x86/extable: Macrofy inline assembly code to work around GCC inlining bugs") - 494b5168f2de009eb80f198f668da374295098dd. ("x86/paravirt: Work around GCC inlining...

Revert the following commits: - 5bdcd510c2ac9efaf55c4cbd8d46421d8e2320cd ("x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs") - d5a581d84ae6b8a4a740464b80d8d9cf1e7947b2 ("x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs") - 0474d5d9d2f7f3b11262f7bf87d0e7314ead9200. ("x86/extable: Macrofy inline assembly code to work around GCC inlining bugs") - 494b5168f2de009eb80f198f668da374295098dd. ("x86/paravirt: Work around GCC inlining...

...tting rid of .parainstructions and pv ops completely. Suggested-by: Andy Lutomirski <luto at kernel.org> Signed-off-by: Josh Poimboeuf <jpoimboe at redhat.com> --- arch/x86/include/asm/alternative-asm.h | 9 +++- arch/x86/include/asm/alternative.h | 12 +++-- arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/paravirt-asm.h | 10 ++++ arch/x86/include/asm/paravirt_types.h | 84 ++++++++++++++++++++++++++++++++++ arch/x86/kernel/alternative.c | 13 ++++++ arch/x86/kernel/cpu/hypervisor.c | 2 + arch/x86/kernel/module.c | 11 ++++- arc...

...fortunately, my understanding of what EDX and EAX means is zero... but looking through your code I suspect that this may be the missing entry from the cpu_flags_strings table in dmi_processor.h: NULL, /* 30 */ In the Linux kernel I see that /proc/cpuinfo is determined through the /usr/include/asm/cpufeature.h include as: #define X86_FEATURE_LM (1*32+29) /* Long Mode (x86-64) */ Would I simply need to Change the NULL entry to a string in cpu_flags_strings table, add a bool in s_cpu_flags and then dmi.c would automagically set the boolean correctly ? I could then modify dmitest to check for...

...problematic arises when one ends up using a lot of inline asm statements in the kernel but due to the inline asm cost estimation heuristic which counts lines, I think, for example like in this here macro: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/include/asm/cpufeature.h#n162 the resulting code ends up not inlining the functions themselves which use this macro. I.e., you see a CALL <function> instead of its body getting inlined directly. Even though it should be because the actual instructions are only a couple in most cases and all those other directive...