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path: root/include/asm-x86/msr.h
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2008-08-25x86: msr: fix bogus return values from rdmsr_safe/wrmsr_safeH. Peter Anvin
Impact: bogus error codes (+other?) on x86-64 The rdmsr_safe/wrmsr_safe routines have macros for the handling of the edx:eax arguments. Those macros take a variable number of assembly arguments. This is rather inherently incompatible with using %digit-style escapes in the inline assembly; replace those with %[name]-style escapes. This fixes miscompilation on x86-64, which at the very least caused bogus return values. It is possible that this could also corrupt the return value; I am not sure. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-08-25x86: msr: propagate errors from smp_call_function_single()H. Peter Anvin
Propagate error (-ENXIO) from smp_call_function_single(). These errors can happen when a CPU is unplugged while the MSR driver is open. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-07-08x86: add memory barriers to wrmsrJeremy Fitzhardinge
wrmsr is a special instruction which can have arbitrary system-wide effects. We don't want the compiler to reorder it with respect to memory operations, so make it a memory barrier. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-26x86: shift bits the right way in native_read_tscpMax Asbock
native_read_tscp shifts the bits in the high order value in the wrong direction, the attached patch fixes that. Signed-off-by: Max Asbock <masbock@linux.vnet.ibm.com> Acked-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17x86: re-add rdmsrl_safeAndi Kleen
RDMSR for 64bit values with exception handling. Makes it easier to deal with 64bit valued MSRs. The old 64bit code base had that too as checking_rdmsrl(), but it got dropped somehow. Signed-off-by: Andi Kleen <andi@firstfloor.org> Cc: andreas.herrmann3@amd.com Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17include/asm-x86/msr.h: checkpatch cleanups - formatting onlyJoe Perches
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-02-04x86: use _ASM_EXTABLE macro in include/asm-x86/msr.hH. Peter Anvin
Use the _ASM_EXTABLE macro from <asm/asm.h>, instead of open-coding __ex_table entires in include/asm-x86/msr.h. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: fix sched_clock()Ingo Molnar
[ andi@firstfloor.org: build fix ] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: move native_read_tsc() offlineIngo Molnar
move native_read_tsc() offline. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: cleanup write_tscGlauber de Oliveira Costa
write_tsc() does not need to be enclosed in any paravirt closure, as it uses wrmsr(). So we rip off the duplicate in msr.h and the definition from paravirt.h Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: __vdso_getcpu() warning fixAndrew Morton
arch/x86/vdso/vgetcpu.c: In function '__vdso_getcpu': arch/x86/vdso/vgetcpu.c:22: warning: pointer targets in passing argument 1 of 'native_read_tscp' differ in signedness Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: integrate 32-bit and 64-bit code in msr.hGlauber de Oliveira Costa
This patches proceeds with the integration of msr.h, making the code unified, instead of having a version for each architecture. We stick with the native_* functions, and then paravirt comes for free. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: make fixups wordsize agnosticGlauber de Oliveira Costa
This patch uses the _ASM_ALIGN and _ASM_PTR macros to make the fixups in native_read/write_msr_safe look the same for x86_64 and i386. Besides using this macros, we also have to take the explicit instruction suffixes out. It's okay because all this instructions uses registers, and can be sized by them. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: change write msr functions interfaceGlauber de Oliveira Costa
This patche changes the native_write_msr() and friends interface to explicitly take 2 32-bit registers instead of a 64-bit value. The change will ease the merge with 64-bit code. As the 64-bit value will be passed as two registers anyway in i386, the PVOP_CALL interface has to account for that and use low/high parameters It would force the x86_64 version to be different. The change does not make i386 generated code less efficient. As said above, it would get the values from two registers anyway. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: change rdpmc interfaceGlauber de Oliveira Costa
the rdpmc instruction gets a counter argument in rcx. However, the i386 version was ignoring it. To make both x86_64 and i386 versions the same, as well as to comply with the instruction semantics, this parameter is added in the i386 version Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: introduce native_read_tscpGlauber de Oliveira Costa
Targetting paravirt, this patch introduces native_read_tscp, in place of rdtscp() macro. When in a paravirt guest, this will involve a function call, and thus, cannot be done in the vdso area. These users then have to call the native version directly Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: unify cpuid functionsGlauber de Oliveira Costa
cpuid is not very different between i386 and x86_64. We move away the x86_64 version from msr.h, and unify them at processor.h, where they belong. cpuid() paravirt then comes for free. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: unify msr smp funcsGlauber de Oliveira Costa
The functions under #ifdef CONFIG_SMP in msr.h are the same for both x86_64 and i386, and this patches removes one of them, putting them in a single location Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-15x86: asm-x86/msr.h: pull in linux/types.hMike Frysinger
Since the msr.h header uses types like __u32, it should pull in linux/types.h. [ mingo@elte.hu: affects user-space that includes this header. We dont actually like user-space including raw kernel headers but it's a longstanding practice and it's easy for the kernel to be nice about this. ] Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-01x86: fix asm-x86/msr.h for user-space exportMike Frysinger
Use __asm__ and __volatile__ in code that is exported to userspace. Wrap kernel functions with __KERNEL__ so they get scrubbed. No code changed: text data bss dec hex filename 9681036 1698924 3407872 14787832 e1a4f8 vmlinux.before 9681036 1698924 3407872 14787832 e1a4f8 vmlinux.after Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-23x86: merge msr_32/64.hThomas Gleixner
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-11i386/x86_64: move headers to include/asm-x86Thomas Gleixner
Move the headers to include/asm-x86 and fixup the header install make rules Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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