- 11 2月, 2015 4 次提交
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由 Rusty Russell 提交于
This involves manually checking the console device (which is always in slot 1 of bus 0) and using the window in VIRTIO_PCI_CAP_PCI_CFG to program it (as we can't map the BAR yet). We could in fact do this much earlier, but we wait for the first write from the virtio_cons_early_init() facility. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
This lets us deliver interrupts for our emulated PCI devices using our dumb PIC, and not emulate an 8259 and PCI irq mapping tables or whatever. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
Once we add PCI, it starts trying to manage our interrupts. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
This no longer speeds up boot (IDE got better, I guess), but it does stop us probing for a PCI bus. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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- 16 12月, 2014 1 次提交
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由 Jan Beulich 提交于
When X86_LOCAL_APIC (i.e. unconditionally on x86-64), first_system_vector will never end up being higher than LOCAL_TIMER_VECTOR (0xef), and hence building stubs for vectors 0xef...0xff is pointlessly reducing code density. Deal with this at build time already. Taking into consideration that X86_64 implies X86_LOCAL_APIC, also simplify (and hence make easier to read and more consistent with the change done here) some #if-s in arch/x86/kernel/irqinit.c. While we could further improve the packing of the IRQ entry stubs (the four ones now left in the last set could be fit into the four padding bytes each of the final four sets have) this doesn't seem to provide any real benefit: Both irq_entries_start and common_interrupt getting cache line aligned, eliminating the 30th set would just produce 32 bytes of padding between the 29th and common_interrupt. [ tglx: Folded lguest fix from Dan Carpenter ] Signed-off-by: NJan Beulich <jbeulich@suse.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: lguest@lists.ozlabs.org Cc: Rusty Russell <rusty@rustcorp.com.au> Link: http://lkml.kernel.org/r/54574D5F0200007800044389@mail.emea.novell.com Link: http://lkml.kernel.org/r/20141115185718.GB6530@mwandaSigned-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 06 5月, 2014 1 次提交
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由 Andi Kleen 提交于
As requested by Linus add explicit __visible to the asmlinkage users. This marks all functions visible to assembler. Tree sweep for arch/x86/* Signed-off-by: NAndi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1398984278-29319-3-git-send-email-andi@firstfloor.orgSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 30 1月, 2014 1 次提交
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由 Andi Kleen 提交于
- Make the C code used by the paravirt stubs visible - Since they have to be global now, give them a more unique name. Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: NAndi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1382458079-24450-3-git-send-email-andi@firstfloor.orgSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 06 9月, 2013 1 次提交
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由 Rusty Russell 提交于
Since the Guest is in ring 1, it can't read the debug registers: doing so gives a number of nasty messages: (gdb) run Starting program: /bin/sleep [ 31.170230] general protection fault: 0000 [#1] SMP [ 31.170230] Modules linked in: [ 31.170230] CPU: 0 PID: 2678 Comm: sleep Not tainted 3.11.0+ #64 [ 31.170230] task: cc5c09b0 ti: cc79c000 task.ti: cc79c000 [ 31.170230] EIP: 0061:[<c01333d8>] EFLAGS: 00000097 CPU: 0 [ 31.170230] EIP is at native_get_debugreg+0x58/0x70 [ 31.170230] EAX: 00000006 EBX: cc79dfb4 ECX: b7fff918 EDX: 00000000 [ 31.170230] ESI: cc5c09b0 EDI: 00000000 EBP: cc79df84 ESP: cc79df84 [ 31.170230] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069 [ 31.170230] CR0: 00000008 CR2: 081ba69a CR3: 0e2f2000 CR4: 00000000 Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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- 15 7月, 2013 1 次提交
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The code was moved in 07fe9977 but the comment was not updated. The reference in drivers/vhost/vhost.c is left alone as it is historic. Signed-off-by: NHolger Hans Peter Freyther <holger@moiji-mobile.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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- 07 6月, 2013 1 次提交
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由 H. Peter Anvin 提交于
Reimplement FPU detection code in C and drop old, not-so-recommended detection method in asm. Move all the relevant stuff into i387.c where it conceptually belongs. Finally drop cpuinfo_x86.hard_math. [ hpa: huge thanks to Borislav for taking my original concept patch and productizing it ] [ Boris, note to self: do not use static_cpu_has before alternatives! ] Signed-off-by: NH. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/r/1367244262-29511-2-git-send-email-bp@alien8.de Link: http://lkml.kernel.org/r/1365436666-9837-2-git-send-email-bp@alien8.deSigned-off-by: NBorislav Petkov <bp@suse.de> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 29 5月, 2013 1 次提交
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由 David Vrabel 提交于
All the virtualized platforms (KVM, lguest and Xen) have persistent wallclocks that have more than one second of precision. read_persistent_wallclock() and update_persistent_wallclock() allow for nanosecond precision but their implementation on x86 with x86_platform.get/set_wallclock() only allows for one second precision. This means guests may see a wallclock time that is off by up to 1 second. Make set_wallclock() and get_wallclock() take a struct timespec parameter (which allows for nanosecond precision) so KVM and Xen guests may start with a more accurate wallclock time and a Xen dom0 can maintain a more accurate wallclock for guests. Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com> Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
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- 11 4月, 2013 1 次提交
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由 Boris Ostrovsky 提交于
Invoking arch_flush_lazy_mmu_mode() results in calls to preempt_enable()/disable() which may have performance impact. Since lazy MMU is not used on bare metal we can patch away arch_flush_lazy_mmu_mode() so that it is never called in such environment. [ hpa: the previous patch "Fix vmalloc_fault oops during lazy MMU updates" may cause a minor performance regression on bare metal. This patch resolves that performance regression. It is somewhat unclear to me if this is a good -stable candidate. ] Signed-off-by: NBoris Ostrovsky <boris.ostrovsky@oracle.com> Link: http://lkml.kernel.org/r/1364045796-10720-2-git-send-email-konrad.wilk@oracle.comTested-by: NJosh Boyer <jwboyer@redhat.com> Tested-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: NBorislav Petkov <bp@suse.de> Signed-off-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com> Cc: <stable@vger.kernel.org> SEE NOTE ABOVE
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- 17 11月, 2012 1 次提交
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由 Alexander Duyck 提交于
The function lguest_write_cr3 is using __pa to convert swapper_pg_dir and initial_page_table from virtual addresses to physical. The correct function to use for these values is __pa_symbol since they are C visible symbols. Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com> Link: http://lkml.kernel.org/r/20121116215748.8521.83556.stgit@ahduyck-cp1.jf.intel.comSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 26 10月, 2012 1 次提交
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由 Borislav Petkov 提交于
mce_ser, mce_bios_cmci_threshold and mce_disabled are the last three bools which need conversion. Move them to the mca_config struct and adjust usage sites accordingly. Signed-off-by: NBorislav Petkov <bp@alien8.de> Acked-by: NTony Luck <tony.luck@intel.com>
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- 12 1月, 2012 1 次提交
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由 Stratos Psomadakis 提交于
Make sure the interrupt is allocated correctly by lguest_setup_irq (check the return value of irq_alloc_desc_at for -ENOMEM) Signed-off-by: NStratos Psomadakis <psomas@cslab.ece.ntua.gr> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (cleanups and commentry)
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- 01 11月, 2011 1 次提交
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由 Paul Gortmaker 提交于
We need this in advance of the module.h cleanup, or we'll get compile errors like this: CC drivers/lguest/lguest_device.o drivers/lguest/lguest_device.c: In function ‘lguest_devices_init’: drivers/lguest/lguest_device.c:490: error: ‘THIS_MODULE’ undeclared (first use in this function) Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
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- 27 10月, 2011 1 次提交
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由 Rusty Russell 提交于
Host might be running under KVM, but we shouldn't allow Guest to think it can use KVM hypercalls (it can't, and it will embarrass itself if it tries). Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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- 22 7月, 2011 4 次提交
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由 Adrian Knoth 提交于
The comment is outdated, wikipedia now has six translations of the cpuid page. Signed-off-by: NAdrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Adrian Knoth 提交于
This patch fixes three typos I've accidentally spotted. Signed-off-by: NAdrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (one was already fixed)
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由 Rusty Russell 提交于
Also removes a long-unused #define and an extraneous semicolon. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
The Host used to create some page tables for the Guest to use at the top of Guest memory; it would then tell the Guest where this was. In particular, it created linear mappings for 0 and 0xC0000000 addresses because lguest used to switch to its real page tables quite late in boot. However, since d50d8fe1 Linux initialized boot page tables in head_32.S even before the "are we lguest?" boot jump. So, now we can simplify things: the Host pagetable code assumes 1:1 linear mapping until it first calls the LHCALL_NEW_PGTABLE hypercall, which we now do before we reach C code. This also means that the Host doesn't need to know anything about the Guest's PAGE_OFFSET. (Non-Linux guests might not even have such a thing). Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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- 30 5月, 2011 1 次提交
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由 Rusty Russell 提交于
Without an IRQ chip set, we now get a WARN_ON and no timer interrupt. This prevents booting. Fortunately, the fix is a one-liner: set up the timer IRQ like everything else. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Cc: stable@kernel.org # .39.x
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- 07 5月, 2011 1 次提交
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由 Rob Landley 提交于
- Documentation/kvm/ to Documentation/virtual/kvm - Documentation/uml/ to Documentation/virtual/uml - Documentation/lguest/ to Documentation/virtual/lguest throughout the kernel source tree. Signed-off-by: NRob Landley <rob@landley.net> Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
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- 18 3月, 2011 1 次提交
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由 Lucas De Marchi 提交于
They were generated by 'codespell' and then manually reviewed. Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi> Cc: trivial@kernel.org LKML-Reference: <1300389856-1099-3-git-send-email-lucas.demarchi@profusion.mobi> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 12 3月, 2011 1 次提交
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由 Thomas Gleixner 提交于
genirq is switching to a consistent name space for the irq related functions. Convert x86. Conversion was done with coccinelle. Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 22 2月, 2011 1 次提交
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由 John Stultz 提交于
This converts the remaining x86 clocksources to use clocksource_register_hz/khz. CC: jacob.jun.pan@intel.com CC: Glauber Costa <glommer@redhat.com> CC: Dimitri Sivanich <sivanich@sgi.com> CC: Rusty Russell <rusty@rustcorp.com.au> CC: Jeremy Fitzhardinge <jeremy@xensource.com> CC: Chris McDermott <lcm@us.ibm.com> CC: Thomas Gleixner <tglx@linutronix.de> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [xen] Signed-off-by: NJohn Stultz <johnstul@us.ibm.com>
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- 20 1月, 2011 2 次提交
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由 Rusty Russell 提交于
arch/x86/lguest/boot.c: In function ‘lguest_init_IRQ’: arch/x86/lguest/boot.c:824: error: macro "__this_cpu_write" requires 2 arguments, but only 1 given arch/x86/lguest/boot.c:824: error: ‘__this_cpu_write’ undeclared (first use in this function) arch/x86/lguest/boot.c:824: error: (Each undeclared identifier is reported only once arch/x86/lguest/boot.c:824: error: for each function it appears in.) drivers/lguest/x86/core.c: In function ‘copy_in_guest_info’: drivers/lguest/x86/core.c:94: error: lvalue required as left operand of assignment Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Christoph Lameter 提交于
Use this_cpu_ops in a couple of places in lguest. Signed-off-by: NChristoph Lameter <cl@linux.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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- 16 12月, 2010 3 次提交
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由 Rusty Russell 提交于
Two x86 patches broke lguest: 1) v2.6.35-492-g72d7c3b3, which changed x86 to use the memblock allocator. In lguest, the host places linear page tables at the top of mem, which used to be enough to get us up to the swapper_pg_dir page tables. With the first patch, the direct mapping tables used that memory: Before: kernel direct mapping tables up to 4000000 @ 7000-1a000 After: kernel direct mapping tables up to 4000000 @ 3fed000-4000000 I initially fixed this by lying about the amount of memory we had, so the kernel wouldn't blatt the lguest boot pagetables (yuk!), but then... 2) v2.6.36-rc8-54-gb40827fa, which made x86 boot use initial_page_table. This was initialized in a part of head_32.S which isn't executed by lguest; it is then copied into swapper_pg_dir. So we have to initialize it; and anyway we switch to it before we blatt the old tables, so that fixes the previous damage as well. For the moment, I cut & pasted the code into lguest's boot code, but next merge window I will merge them. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> To: x86@kernel.org
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由 Rusty Russell 提交于
lguest is dumb and drops *all* the pagetables for set_pte (which is only used for kernel mapping manipulation, so it's OK without highmem). But it's used a lot in boot, too. As a guest optimization, we suppressed this flushing until the first page switch. Now we have initial_page_table, that happens much earlier, so extend the heuristic to wait until we switch to something other than the swapper_pg_dir or initial_page_table. As measured on my laptop under kvm, this dropped the time-to-mount-root from 48 seconds to 4.3 seconds. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
fe25c7fc "x86: lguest: Convert to new irq chip functions" converted enable_lguest_irq() to take a struct irq_data *, but didn't fix the one internal caller. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> To: x86@kernel.org
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- 12 10月, 2010 2 次提交
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由 Thomas Gleixner 提交于
Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Reviewed-by: NIngo Molnar <mingo@elte.hu> Cc: Rusty Russell <rusty@rustcorp.com.au>
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由 Thomas Gleixner 提交于
Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Reviewed-by: NIngo Molnar <mingo@elte.hu> Cc: Rusty Russell <rusty@rustcorp.com.au>
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- 21 9月, 2010 1 次提交
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由 Rusty Russell 提交于
We used to have a hypercall which reloaded the entire GDT, then we switched to one which loaded a single entry (to match the IDT code). Some comments were not updated, so fix them. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Reported by: Eviatar Khen <eviatarkhen@gmail.com>
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- 14 4月, 2010 1 次提交
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由 Rusty Russell 提交于
This is a partial revert of 4cd8b5e2 "lguest: use KVM hypercalls"; we revert to using (just as questionable but more reliable) int $15 for hypercalls. I didn't revert the register mapping, so we still use the same calling convention as kvm. KVM in more recent incarnations stopped injecting a fault when a guest tried to use the VMCALL instruction from ring 1, so lguest under kvm fails to make hypercalls. It was nice to share code with our KVM cousins, but this was overreach. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Cc: Matias Zabaljauregui <zabaljauregui@gmail.com> Cc: Avi Kivity <avi@redhat.com>
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- 15 3月, 2010 1 次提交
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由 Len Brown 提交于
acpi=ht was important in 2003 -- before ACPI was universally deployed and enabled by default in the major Linux distributions. At that time, there were a fair number of people who or chose to, or needed to, run with acpi=off, yet also wanted access to Hyper-threading. Today we find that many invocations of "acpi=ht" are accidental, and thus is it possible that it is doing more harm than good. In 2.6.34, we warn on invocation of acpi=ht. In 2.6.35, we delete the boot option. Signed-off-by: NLen Brown <len.brown@intel.com>
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- 23 9月, 2009 1 次提交
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由 Rusty Russell 提交于
We used to defer it, so lockdep was happy. We now init lockdep early anyway, so just do it after that. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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- 16 9月, 2009 1 次提交
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由 Feng Tang 提交于
get/set_wallclock() have already a set of platform dependent implementations (default, EFI, paravirt). MRST will add another variant. Moving them to platform ops simplifies the existing code and minimizes the effort to integrate new variants. Signed-off-by: NFeng Tang <feng.tang@intel.com> LKML-Reference: <new-submission> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 31 8月, 2009 2 次提交
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由 Thomas Gleixner 提交于
TSC calibration is modified by the vmware hypervisor and paravirt by separate means. Moorestown wants to add its own calibration routine as well. So make calibrate_tsc a proper x86_init_ops function and override it by paravirt or by the early setup of the vmware hypervisor. Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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由 Thomas Gleixner 提交于
The timer init code is convoluted with several quirks and the paravirt timer chooser. Figuring out which code path is actually taken is not for the faint hearted. Move the numaq TSC quirk to tsc_pre_init x86_init_ops function and replace the paravirt time chooser and the remaining x86 quirk with a simple x86_init_ops function. Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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