Brian Gerst
d4ce0f26c7
x86/vm86: Move fields from 'struct kernel_vm86_struct' to 'struct vm86'
...
Move the non-regs fields to the off-stack data.
Signed-off-by: Brian Gerst <brgerst@gmail.com >
Acked-by: Andy Lutomirski <luto@kernel.org >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1438148483-11932-3-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-31 13:31:08 +02:00
Brian Gerst
9fda6a0681
x86/vm86: Move vm86 fields out of 'thread_struct'
...
Allocate a separate structure for the vm86 fields.
Signed-off-by: Brian Gerst <brgerst@gmail.com >
Acked-by: Andy Lutomirski <luto@kernel.org >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1438148483-11932-2-git-send-email-brgerst@gmail.com
[ Build fixes. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-31 13:31:07 +02:00
Andy Lutomirski
a5b9e5a2f1
x86/ldt: Make modify_ldt() optional
...
The modify_ldt syscall exposes a large attack surface and is
unnecessary for modern userspace. Make it optional.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Reviewed-by: Kees Cook <keescook@chromium.org >
Cc: Andrew Cooper <andrew.cooper3@citrix.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Jan Beulich <jbeulich@suse.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Sasha Levin <sasha.levin@oracle.com >
Cc: Steven Rostedt <rostedt@goodmis.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: security@kernel.org <security@kernel.org >
Cc: xen-devel <xen-devel@lists.xen.org >
Link: http://lkml.kernel.org/r/a605166a771c343fd64802dece77a903507333bd.1438291540.git.luto@kernel.org
[ Made MATH_EMULATION dependent on MODIFY_LDT_SYSCALL. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-31 13:30:45 +02:00
Mathias Krause
b1c599b8ff
x86/cpufeature: Add feature bit for Intel's Silicon Debug CPUID bit
...
Add a CPUID feature bit for the SDBG (Silicon Debug) CPU feature
found on recent Intel systems starting with Haswell.
Using the IA32_DEBUG_INTERFACE MSR (index C80H) one can at least
detect if SDBG has been enabled by the firmware and if it has
been used or not.
Signed-off-by: Mathias Krause <minipli@googlemail.com >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Aaron Lu <aaron.lu@intel.com >
Cc: Dave Hansen <dave.hansen@linux.intel.com >
Cc: Dirk Brandewie <dirk.j.brandewie@intel.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Josh Triplett <josh@joshtriplett.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ross Zwisler <ross.zwisler@linux.intel.com >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1437330403-12102-1-git-send-email-minipli@googlemail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-31 10:34:07 +02:00
Ingo Molnar
5b929bd11d
Merge branch 'x86/urgent' into x86/asm, before applying dependent patches
...
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-31 10:23:35 +02:00
Andy Lutomirski
37868fe113
x86/ldt: Make modify_ldt synchronous
...
modify_ldt() has questionable locking and does not synchronize
threads. Improve it: redesign the locking and synchronize all
threads' LDTs using an IPI on all modifications.
This will dramatically slow down modify_ldt in multithreaded
programs, but there shouldn't be any multithreaded programs that
care about modify_ldt's performance in the first place.
This fixes some fallout from the CVE-2015-5157 fixes.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Reviewed-by: Borislav Petkov <bp@suse.de >
Cc: Andrew Cooper <andrew.cooper3@citrix.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Jan Beulich <jbeulich@suse.com >
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Sasha Levin <sasha.levin@oracle.com >
Cc: Steven Rostedt <rostedt@goodmis.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: security@kernel.org <security@kernel.org >
Cc: <stable@vger.kernel.org >
Cc: xen-devel <xen-devel@lists.xen.org >
Link: http://lkml.kernel.org/r/4c6978476782160600471bd865b318db34c7b628.1438291540.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-31 10:23:23 +02:00
Jiang Liu
991de2e590
PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()
...
To support IOAPIC hotplug, we need to allocate PCI IRQ resources on demand
and free them when not used anymore.
Implement pcibios_alloc_irq() and pcibios_free_irq() to dynamically
allocate and free PCI IRQs.
Remove mp_should_keep_irq(), which is no longer used.
[bhelgaas: changelog]
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com >
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com >
Acked-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-30 14:05:57 -05:00
Paolo Bonzini
d71ba78834
KVM: move code related to KVM_SET_BOOT_CPU_ID to x86
...
This is another remnant of ia64 support.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com >
2015-07-29 14:27:21 +02:00
Peter Zijlstra
de9e432cb5
atomic: Collapse all atomic_{set,clear}_mask definitions
...
Move the now generic definitions of atomic_{set,clear}_mask() into
linux/atomic.h to avoid endless and pointless repetition.
Also, provide an atomic_andnot() wrapper for those few archs that can
implement that.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-27 14:06:24 +02:00
Peter Zijlstra
e6942b7de2
atomic: Provide atomic_{or,xor,and}
...
Implement atomic logic ops -- atomic_{or,xor,and}.
These will replace the atomic_{set,clear}_mask functions that are
available on some archs.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-27 14:06:24 +02:00
Peter Zijlstra
7fc1845dd4
x86: Provide atomic_{or,xor,and}
...
Implement atomic logic ops -- atomic_{or,xor,and}.
These will replace the atomic_{set,clear}_mask functions that are
available on some archs.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org >
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-27 14:06:23 +02:00
Mihai Donțu
5f3d45e7f2
kvm/x86: add support for MONITOR_TRAP_FLAG
...
Allow a nested hypervisor to single step its guests.
Signed-off-by: Mihai Donțu <mihai.dontu@gmail.com >
[Fix overlong line. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com >
2015-07-23 08:27:07 +02:00
Andrey Smetanin
e7d9513b60
kvm/x86: added hyper-v crash msrs into kvm hyperv context
...
Added kvm Hyper-V context hv crash variables as storage
of Hyper-V crash msrs.
Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com >
Signed-off-by: Denis V. Lunev <den@openvz.org >
Reviewed-by: Peter Hornyack <peterhornyack@google.com >
CC: Paolo Bonzini <pbonzini@redhat.com >
CC: Gleb Natapov <gleb@kernel.org >
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com >
2015-07-23 08:27:06 +02:00
Andrey Smetanin
e83d58874b
kvm/x86: move Hyper-V MSR's/hypercall code into hyperv.c file
...
This patch introduce Hyper-V related source code file - hyperv.c and
per vm and per vcpu hyperv context structures.
All Hyper-V MSR's and hypercall code moved into hyperv.c.
All Hyper-V kvm/vcpu fields moved into appropriate hyperv context
structures. Copyrights and authors information copied from x86.c
to hyperv.c.
Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com >
Signed-off-by: Denis V. Lunev <den@openvz.org >
Reviewed-by: Peter Hornyack <peterhornyack@google.com >
CC: Paolo Bonzini <pbonzini@redhat.com >
CC: Gleb Natapov <gleb@kernel.org >
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com >
2015-07-23 08:27:06 +02:00
Paolo Pisati
949163015c
x86/boot: Obsolete the MCA sys_desc_table
...
The kernel does not support the MCA bus anymroe, so mark sys_desc_table
as obsolete: remove any reference from the code together with the remaining
of MCA logic.
bloat-o-meter output:
add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-55 (-55)
function old new delta
i386_start_kernel 128 119 -9
setup_arch 1421 1375 -46
Signed-off-by: Paolo Pisati <p.pisati@gmail.com >
Cc: Josh Triplett <josh@joshtriplett.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1437409430-8491-1-git-send-email-p.pisati@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-21 10:55:11 +02:00
Luis R. Rodriguez
8c7ea50c01
x86/mm, asm-generic: Add IOMMU ioremap_uc() variant default
...
We currently have no safe way of currently defining architecture
agnostic IOMMU ioremap_*() variants. The trend is for folks to
*assume* that ioremap_nocache() should be the default everywhere
and then add this mapping on each architectures -- this is not
correct today for a variety of reasons.
We have two options:
1) Sit and wait for every architecture in Linux to get a
an ioremap_*() variant defined before including it upstream.
2) Gather consensus on a safe architecture agnostic ioremap_*()
default.
Approach 1) introduces development latencies, and since 2) will
take time and work on clarifying semantics the only remaining
sensible thing to do to avoid issues is returning NULL on
ioremap_*() variants.
In order for this to work we must have all architectures declare
their own ioremap_*() variants as defined. This will take some
work, do this for ioremp_uc() to set the example as its only
currently implemented on x86. Document all this.
We only provide implementation support for ioremap_uc() as the
other ioremap_*() variants are well defined all over the kernel
for other architectures already.
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: arnd@arndb.de
Cc: benh@kernel.crashing.org
Cc: bp@suse.de
Cc: dan.j.williams@intel.com
Cc: geert@linux-m68k.org
Cc: hch@lst.de
Cc: hmh@hmh.eng.br
Cc: jgross@suse.com
Cc: linux-mm@kvack.org
Cc: luto@amacapital.net
Cc: mpe@ellerman.id.au
Cc: mst@redhat.com
Cc: ralf@linux-mips.org
Cc: ross.zwisler@linux.intel.com
Cc: stefan.bader@canonical.com
Cc: tj@kernel.org
Cc: tomi.valkeinen@ti.com
Cc: toshi.kani@hp.com
Link: http://lkml.kernel.org/r/1436488096-3165-1-git-send-email-mcgrof@do-not-panic.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-21 10:47:03 +02:00
Brian Gerst
ed0b2edb61
x86/entry/vm86: Move userspace accesses to do_sys_vm86()
...
Move the userspace accesses down into the common function in
preparation for the next set of patches. Also change to copying
the fields explicitly instead of assuming a fixed order in
pt_regs and the kernel data structures.
Signed-off-by: Brian Gerst <brgerst@gmail.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1437354550-25858-4-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-21 09:12:24 +02:00
Brian Gerst
0233606ce5
x86/entry/vm86: Clean up saved_fs/gs
...
There is no need to save FS and non-lazy GS outside the 32-bit
regs. Lazy GS still needs to be saved because it wasn't saved
on syscall entry. Save it in the gs slot of regs32, which is
present but unused.
Signed-off-by: Brian Gerst <brgerst@gmail.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1437354550-25858-2-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-21 09:12:23 +02:00
Minfei Huang
c93bf928fe
ftrace: Format MCOUNT_ADDR address as type unsigned long
...
Always we use type unsigned long to format the ip address, since the
value of ip address is never the negative.
This patch uses type unsigned long, instead of long, to format the ip
address. The code is more clearly to be viewed by using type unsigned
long, although it is correct by using either unsigned long or long.
Link: http://lkml.kernel.org/r/1436694744-16747-1-git-send-email-mhuang@redhat.com
Cc: Minfei Huang <mnfhuang@gmail.com >
Cc: "H. Peter Anvin" <hpa@zytor.com >
Cc: James Hogan <james.hogan@imgtec.com >
Cc: Michal Simek <monstr@monstr.eu >
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org >
Cc: "David S. Miller" <davem@davemloft.net >
Signed-off-by: Minfei Huang <mnfhuang@gmail.com >
Signed-off-by: Steven Rostedt <rostedt@goodmis.org >
2015-07-20 22:30:53 -04:00
Linus Torvalds
0e1dbccd8f
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
...
Pull x86 fixes from Ingo Molnar:
"Two families of fixes:
- Fix an FPU context related boot crash on newer x86 hardware with
larger context sizes than what most people test. To fix this
without ugly kludges or extensive reverts we had to touch core task
allocator, to allow x86 to determine the task size dynamically, at
boot time.
I've tested it on a number of x86 platforms, and I cross-built it
to a handful of architectures:
(warns) (warns)
testing x86-64: -git: pass ( 0), -tip: pass ( 0)
testing x86-32: -git: pass ( 0), -tip: pass ( 0)
testing arm: -git: pass ( 1359), -tip: pass ( 1359)
testing cris: -git: pass ( 1031), -tip: pass ( 1031)
testing m32r: -git: pass ( 1135), -tip: pass ( 1135)
testing m68k: -git: pass ( 1471), -tip: pass ( 1471)
testing mips: -git: pass ( 1162), -tip: pass ( 1162)
testing mn10300: -git: pass ( 1058), -tip: pass ( 1058)
testing parisc: -git: pass ( 1846), -tip: pass ( 1846)
testing sparc: -git: pass ( 1185), -tip: pass ( 1185)
... so I hope the cross-arch impact 'none', as intended.
(by Dave Hansen)
- Fix various NMI handling related bugs unearthed by the big asm code
rewrite and generally make the NMI code more robust and more
maintainable while at it. These changes are a bit late in the
cycle, I hope they are still acceptable.
(by Andy Lutomirski)"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86
x86/fpu, sched: Dynamically allocate 'struct fpu'
x86/entry/64, x86/nmi/64: Add CONFIG_DEBUG_ENTRY NMI testing code
x86/nmi/64: Make the "NMI executing" variable more consistent
x86/nmi/64: Minor asm simplification
x86/nmi/64: Use DF to avoid userspace RSP confusing nested NMI detection
x86/nmi/64: Reorder nested NMI checks
x86/nmi/64: Improve nested NMI comments
x86/nmi/64: Switch stacks on userspace NMI entry
x86/nmi/64: Remove asm code that saves CR2
x86/nmi: Enable nested do_nmi() handling for 64-bit kernels
2015-07-18 10:49:57 -07:00
Linus Torvalds
f79a17bf26
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
...
Pull perf fixes from Ingo Molnar:
"Mostly tooling fixes, plus a static key fix fixing /sys/devices/cpu/rdpmc"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf tools: Really allow to specify custom CC, AR or LD
perf auxtrace: Fix misplaced check for HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT
perf hists browser: Take the --comm, --dsos, etc filters into account
perf symbols: Store if there is a filter in place
x86, perf: Fix static_key bug in load_mm_cr4()
tools: Copy lib/hweight.c from the kernel sources
perf tools: Fix the detached tarball wrt rbtree copy
perf thread_map: Fix the sizeof() calculation for map entries
tools lib: Improve clean target
perf stat: Fix shadow declaration of close
perf tools: Fix lockup using 32-bit compat vdso
2015-07-18 10:44:21 -07:00
Dave Hansen
0c8c0f03e3
x86/fpu, sched: Dynamically allocate 'struct fpu'
...
The FPU rewrite removed the dynamic allocations of 'struct fpu'.
But, this potentially wastes massive amounts of memory (2k per
task on systems that do not have AVX-512 for instance).
Instead of having a separate slab, this patch just appends the
space that we need to the 'task_struct' which we dynamically
allocate already. This saves from doing an extra slab
allocation at fork().
The only real downside here is that we have to stick everything
and the end of the task_struct. But, I think the
BUILD_BUG_ON()s I stuck in there should keep that from being too
fragile.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Dave Hansen <dave@sr71.net >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Oleg Nesterov <oleg@redhat.com >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1437128892-9831-2-git-send-email-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-18 03:42:35 +02:00
Laurent Dufour
f2abeef9fd
mm: clean up per architecture MM hook header files
...
Commit 2ae416b142ldufour@linux.vnet.ibm.com >
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org >
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org >
Acked-by: Vineet Gupta <vgupta@synopsys.com >
Cc: Oleg Nesterov <oleg@redhat.com >
Signed-off-by: Andrew Morton <akpm@linux-foundation.org >
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org >
2015-07-17 16:39:53 -07:00
Linus Torvalds
3e87ee06d0
Merge tag 'platform-drivers-x86-v4.2-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
...
Pull x86 platform driver fixes from Darren Hart:
"Fix SMBIOS call handling and hwswitch state coherency in the
dell-laptop driver. Cleanups for intel_*_ipc drivers. Details:
dell-laptop:
- Do not cache hwswitch state
- Check return value of each SMBIOS call
- Clear buffer before each SMBIOS call
intel_scu_ipc:
- Move local memory initialization out of a mutex
intel_pmc_ipc:
- Update kerneldoc formatting
- Fix compiler casting warnings"
* tag 'platform-drivers-x86-v4.2-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
intel_scu_ipc: move local memory initialization out of a mutex
intel_pmc_ipc: Update kerneldoc formatting
dell-laptop: Do not cache hwswitch state
dell-laptop: Check return value of each SMBIOS call
dell-laptop: Clear buffer before each SMBIOS call
intel_pmc_ipc: Fix compiler casting warnings
2015-07-16 20:57:25 -07:00
Andy Shevchenko
7e1ff15b69
x86/platform/iosf_mbi: Source cleanup
...
- Move the static variables to one place
- Fix indentations in the header
- Correct comments
No functional change.
[ tglx: Massaged changelog ]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com >
Cc: David E . Box <david.e.box@linux.intel.com >
Link: http://lkml.kernel.org/r/1436366709-17683-5-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de >
2015-07-16 17:48:48 +02:00
Linus Torvalds
df14a68d63
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
...
Pull KVM fixes from Paolo Bonzini:
- Fix FPU refactoring ("kvm: x86: fix load xsave feature warning")
- Fix eager FPU mode (Cc stable)
- AMD bits of MTRR virtualization
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm: x86: fix load xsave feature warning
KVM: x86: apply guest MTRR virtualization on host reserved pages
KVM: SVM: Sync g_pat with guest-written PAT value
KVM: SVM: use NPT page attributes
KVM: count number of assigned devices
KVM: VMX: fix vmwrite to invalid VMCS
KVM: x86: reintroduce kvm_is_mmio_pfn
x86: hyperv: add CPUID bit for crash handlers
2015-07-15 13:30:12 -07:00
Paolo Bonzini
5544eb9b81
KVM: count number of assigned devices
...
If there are no assigned devices, the guest PAT are not providing
any useful information and can be overridden to writeback; VMX
always does this because it has the "IPAT" bit in its extended
page table entries, but SVM does not have anything similar.
Hook into VFIO and legacy device assignment so that they
provide this information to KVM.
Reviewed-by: Alex Williamson <alex.williamson@redhat.com >
Tested-by: Joerg Roedel <jroedel@suse.de >
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com >
2015-07-10 13:25:26 +02:00
Peter Zijlstra
a833581e37
x86, perf: Fix static_key bug in load_mm_cr4()
...
Mikulas reported his K6-3 not booting. This is because the
static_key API confusion struck and bit Andy, this wants to be
static_key_false().
Reported-by: Mikulas Patocka <mpatocka@redhat.com >
Tested-by: Mikulas Patocka <mpatocka@redhat.com >
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org >
Cc: <stable@vger.kernel.org >
Cc: Andrea Arcangeli <aarcange@redhat.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Arnaldo Carvalho de Melo <acme@kernel.org >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Kees Cook <keescook@chromium.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Paul Mackerras <paulus@samba.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu >
Cc: Vince Weaver <vince@deater.net >
Cc: hillf.zj <hillf.zj@alibaba-inc.com >
Fixes: a66734297fhttp://lkml.kernel.org/r/20150709172338.GC19282@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-10 10:24:38 +02:00
qipeng.zha
02941007f5
intel_pmc_ipc: Update kerneldoc formatting
...
Update kerneldoc formatting per Documentation/kernel-dec-nano-HOWTO.txt.
Signed-off-by: qipeng.zha <qipeng.zha@intel.com >
Signed-off-by: Darren Hart <dvhart@linux.intel.com >
2015-07-09 11:23:15 -07:00
Andy Lutomirski
06a7b36c7b
x86/entry: Remove SCHEDULE_USER and asm/context-tracking.h
...
SCHEDULE_USER is no longer used, and asm/context-tracking.h
contained nothing else. Remove the header entirely.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: Denys Vlasenko <vda.linux@googlemail.com >
Cc: Frederic Weisbecker <fweisbec@gmail.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Kees Cook <keescook@chromium.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Oleg Nesterov <oleg@redhat.com >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Rik van Riel <riel@redhat.com >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/854e9b45f69af20e26c47099eb236321563ebcee.1435952415.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-07 10:59:09 +02:00
Andy Lutomirski
8c84014f3b
x86/entry: Remove exception_enter() from most trap handlers
...
On 64-bit kernels, we don't need it any more: we handle context
tracking directly on entry from user mode and exit to user mode.
On 32-bit kernels, we don't support context tracking at all, so
these callbacks had no effect.
Note: this doesn't change do_page_fault(). Before we do that,
we need to make sure that there is no code that can page fault
from kernel mode with CONTEXT_USER. The 32-bit fast system call
stack argument code is the only offender I'm aware of right now.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: Denys Vlasenko <vda.linux@googlemail.com >
Cc: Frederic Weisbecker <fweisbec@gmail.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Kees Cook <keescook@chromium.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Oleg Nesterov <oleg@redhat.com >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Rik van Riel <riel@redhat.com >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/ae22f4dfebd799c916574089964592be218151f9.1435952415.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-07 10:59:09 +02:00
Andy Lutomirski
1f484aa690
x86/entry: Move C entry and exit code to arch/x86/entry/common.c
...
The entry and exit C helpers were confusingly scattered between
ptrace.c and signal.c, even though they aren't specific to
ptrace or signal handling. Move them together in a new file.
This change just moves code around. It doesn't change anything.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: Denys Vlasenko <vda.linux@googlemail.com >
Cc: Frederic Weisbecker <fweisbec@gmail.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Kees Cook <keescook@chromium.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Oleg Nesterov <oleg@redhat.com >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Rik van Riel <riel@redhat.com >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/324d686821266544d8572423cc281f961da445f4.1435952415.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-07 10:59:05 +02:00
Andy Shevchenko
2b8f8eddaf
x86/platform/intel/pmc_atom: Add Cherrytrail PMC interface
...
The patch adds CHT PMC interface. This exposes all the South IP
device power states and S0ix states for CHT. The bit map of
FUNC_DIS and D3_STS_0 registers for SoCs are consistent. The
D3_STS_1 and FUNC_DIS_2 registers, however, are not aligned.
This is fixed by splitting a common mapping on per register basis.
(Originally based on code from Kumar P Mahesh.)
Originally-from: Kumar P Mahesh <mahesh.kumar.p@intel.com >
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com >
Cc: Aubrey Li <aubrey.li@linux.intel.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Rafael J . Wysocki <rafael.j.wysocki@intel.com >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1436192944-56496-5-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 18:39:38 +02:00
Andy Shevchenko
68872eb9b1
x86/platform/intel/pmc_atom: Export accessors to PMC registers
...
Export the pmc_atom_read() and pmc_atom_write() accessors to the PMC
registers. On early initcall stages the functions will return
-ENODEV, and caller has to wait when it will be available.
Additionally make absence of debugfs a non-fatal error.
The patch will be useful for the upcoming fixes regarding to the
LPSS block found on Intel BayTrail-T and Braswell.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com >
Cc: Aubrey Li <aubrey.li@linux.intel.com >
Cc: Kumar P Mahesh <mahesh.kumar.p@intel.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Rafael J . Wysocki <rafael.j.wysocki@intel.com >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1436192944-56496-2-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 17:42:45 +02:00
Brian Gerst
ab8b82ee6d
x86/compat: Don't build the 32-bit VDSO if not needed
...
Build the 32-bit vdso only for native 32-bit or 32-bit compat is
enabled. x32 should not force it to build.
Signed-off-by: Brian Gerst <brgerst@gmail.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1434974121-32575-7-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:28:56 +02:00
Brian Gerst
7da770785f
x86/compat: Rename 'start_thread_ia32' to 'compat_start_thread'
...
This function is shared between the 32-bit compat and x32 ABIs.
Signed-off-by: Brian Gerst <brgerst@gmail.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1434974121-32575-5-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:28:56 +02:00
Brian Gerst
b829d1be20
x86/compat: Move ucontext_x32 to sigframe.h
...
ia32.h should only contain the code for 32-bit compatability.
Signed-off-by: Brian Gerst <brgerst@gmail.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1434974121-32575-4-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:28:55 +02:00
Brian Gerst
b2e02b820d
x86/compat: Make mmap_is_ia32() common compat
...
TIF_ADDR32 is set for both ia32 and x32 tasks, so change from
CONFIG_IA32_EMULATION to CONFIG_COMPAT. Use config_enabled()
to make the function more readable.
Signed-off-by: Brian Gerst <brgerst@gmail.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/1434974121-32575-3-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:28:55 +02:00
George Spelvin
5a33fcb8d9
x86/asm/tsc: Save an instruction in DECLARE_ARGS users
...
Before, the code to do RDTSC looked like:
rdtsc
shl $0x20, %rdx
mov %eax, %eax
or %rdx, %rax
The "mov %eax, %eax" is required to clear the high 32 bits of RAX.
By declaring low and high as 64-bit variables, the code is
simplified to:
rdtsc
shl $0x20,%rdx
or %rdx,%rax
Yes, it's a 2-byte instruction that's not on a critical path,
but there are principles to be upheld.
Every user of EAX_EDX_RET has been checked. I tried to check
users of EAX_EDX_ARGS, but there weren't any, so I deleted it to
be safe.
( There's no benefit to making "high" 64 bits, but it was the
simplest way to proceed. )
Signed-off-by: George Spelvin <linux@horizon.com >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: jacob.jun.pan@linux.intel.com
Link: http://lkml.kernel.org/r/20150618075906.4615.qmail@ns.horizon.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:30 +02:00
Andy Lutomirski
bb8dd96032
x86/asm/tsc: Remove rdtsc_barrier()
...
All callers have been converted to rdtsc_ordered().
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Richard Weinberger <richard@nod.at >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/9baa4ae9a1e7c7c282f9cb2f15bb6bf5c2004032.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:30 +02:00
Andy Lutomirski
502dfeff23
x86/asm/tsc, x86/kvm: Drop open-coded barrier and use rdtsc_ordered() in kvmclock
...
__pvclock_read_cycles() used to have two barriers, one of which was unnecessary,
which got removed after an initial version of this patch was sent.
But the barrier is still open-coded unnecessarily - get rid of
that barrier and clean up the code by just using rdtsc_ordered().
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Marcelo Tosatti <mtosatti@redhat.com >
Cc: Paolo Bonzini <pbonzini@redhat.com >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Radim Krcmar <rkrcmar@redhat.com >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/678981cc4761fb38a793c217c9cac42503cf3719.1434501121.git.luto@kernel.org
[ Ported it to v4.2-rc1. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:30 +02:00
Andy Lutomirski
03b9730b76
x86/asm/tsc: Add rdtsc_ordered() and use it in trivial call sites
...
rdtsc_barrier(); rdtsc() is an unnecessary mouthful and requires
more thought than should be necessary. Add an rdtsc_ordered()
helper and replace the trivial call sites with it.
This should not change generated code. The duplication of the
fence asm is temporary.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/dddbf98a2af53312e9aa73a5a2b1622fe5d6f52b.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:29 +02:00
Andy Lutomirski
4ea1636b04
x86/asm/tsc: Rename native_read_tsc() to rdtsc()
...
Now that there is no paravirt TSC, the "native" is
inappropriate. The function does RDTSC, so give it the obvious
name: rdtsc().
Suggested-by: Borislav Petkov <bp@suse.de >
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/fd43e16281991f096c1e4d21574d9e1402c62d39.1434501121.git.luto@kernel.org
[ Ported it to v4.2-rc1. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:28 +02:00
Andy Lutomirski
fe47ae6e1a
x86/asm/tsc: Remove rdtscl()
...
It has no more callers, and it was never a very sensible
interface to begin with. Users of the TSC should either read all
64 bits or explicitly throw out the high bits.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/250105f7cee519be9d7fc4464b5784caafc8f4fe.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:28 +02:00
Andy Lutomirski
ec69de52c6
x86/asm/tsc: Remove the rdtscp() and rdtscpll() macros
...
They have no users. Leave native_read_tscp() which seems
potentially useful despite also having no callers.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/6abfa3ef80534b5d73898a48c4d25e069303cbe5.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:26 +02:00
Andy Lutomirski
87be28aaf1
x86/asm/tsc: Replace rdtscll() with native_read_tsc()
...
Now that the ->read_tsc() paravirt hook is gone, rdtscll() is
just a wrapper around native_read_tsc(). Unwrap it.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/d2449ae62c1b1fb90195bcfb19ef4a35883a04dc.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:26 +02:00
Andy Lutomirski
9261e050b6
x86/asm/tsc, x86/paravirt: Remove read_tsc() and read_tscp() paravirt hooks
...
We've had ->read_tsc() and ->read_tscp() paravirt hooks since
the very beginning of paravirt, i.e.,
d3561b7fa010936321093632luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Cc: virtualization@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/d08a2600fb298af163681e5efd8e599d889a5b97.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:26 +02:00
Andy Lutomirski
881d7bf843
x86/asm/tsc, kvm: Remove vget_cycles()
...
The only caller was KVM's read_tsc(). The only difference
between vget_cycles() and native_read_tsc() was that
vget_cycles() returned zero instead of crashing on TSC-less
systems. KVM already checks vclock_mode() before calling that
function, so the extra check is unnecessary. Also, KVM
(host-side) requires the TSC to exist.
Signed-off-by: Andy Lutomirski <luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Acked-by: Paolo Bonzini <pbonzini@redhat.com >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/20615df14ae2eb713ea7a5f5123c1dc4c7ca993d.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:25 +02:00
Andy Lutomirski
c6e5ca35c4
x86/asm/tsc: Inline native_read_tsc() and remove __native_read_tsc()
...
In the following commit:
cdc7957d19luto@kernel.org >
Signed-off-by: Borislav Petkov <bp@suse.de >
Cc: Andy Lutomirski <luto@amacapital.net >
Cc: Borislav Petkov <bp@alien8.de >
Cc: Brian Gerst <brgerst@gmail.com >
Cc: Denys Vlasenko <dvlasenk@redhat.com >
Cc: H. Peter Anvin <hpa@zytor.com >
Cc: Huang Rui <ray.huang@amd.com >
Cc: John Stultz <john.stultz@linaro.org >
Cc: Len Brown <lenb@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Ralf Baechle <ralf@linux-mips.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Cc: kvm ML <kvm@vger.kernel.org >
Link: http://lkml.kernel.org/r/d05ffe2aaf8468ca475ebc00efad7b2fa174af19.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:23:25 +02:00
Zhu Guihua
1db875631f
x86/espfix: Add 'cpu' parameter to init_espfix_ap()
...
Add a CPU index parameter to init_espfix_ap(), so that the
parameter could be propagated to the function for espfix
page allocation.
Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com >
Cc: <bp@alien8.de >
Cc: <luto@amacapital.net >
Cc: <luto@kernel.org >
Cc: Linus Torvalds <torvalds@linux-foundation.org >
Cc: Peter Zijlstra <peterz@infradead.org >
Cc: Thomas Gleixner <tglx@linutronix.de >
Link: http://lkml.kernel.org/r/cde3fcf1b3211f3f03feb1a995bce3fee850f0fc.1435824469.git.zhugh.fnst@cn.fujitsu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org >
2015-07-06 15:00:33 +02:00
