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2020-02-24KVM: selftests: Create a demand paging testBen Gardon
While userfaultfd, KVM's demand paging implementation, is not specific to KVM, having a benchmark for its performance will be useful for guiding performance improvements to KVM. As a first step towards creating a userfaultfd demand paging test, create a simple memory access test, based on dirty_log_test. Reviewed-by: Oliver Upton <oupton@google.com> Signed-off-by: Ben Gardon <bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24KVM: selftests: Introduce num-pages conversion utilitiesAndrew Jones
Guests and hosts don't have to have the same page size. This means calculations are necessary when selecting the number of guest pages to allocate in order to ensure the number is compatible with the host. Provide utilities to help with those calculations and apply them where appropriate. We also revert commit bffed38d4fb5 ("kvm: selftests: aarch64: dirty_log_test: fix unaligned memslot size") and then use vm_adjust_num_guest_pages() there instead. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24KVM: selftests: Introduce vm_guest_mode_paramsAndrew Jones
This array will allow us to easily translate modes to their parameter values. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24KVM: selftests: Rename vm_guest_mode_paramsAndrew Jones
We're going to want this name in the library code, so use a shorter name in the tests. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24KVM: selftests: aarch64: Remove unnecessary ifdefsAndrew Jones
Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24KVM: selftests: Remove unnecessary definesAndrew Jones
BITS_PER_LONG and friends are provided by linux/bitops.h Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24KVM: selftests: aarch64: Use stream when givenAndrew Jones
I'm not sure how we ended up using printf instead of fprintf in virt_dump(). Fix it. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-24KVM: s390: rstify new ioctls in api.rstChristian Borntraeger
We also need to rstify the new ioctls that we added in parallel to the rstification of the kvm docs. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-23KVM: nVMX: Check IO instruction VM-exit conditionsOliver Upton
Consult the 'unconditional IO exiting' and 'use IO bitmaps' VM-execution controls when checking instruction interception. If the 'use IO bitmaps' VM-execution control is 1, check the instruction access against the IO bitmaps to determine if the instruction causes a VM-exit. Signed-off-by: Oliver Upton <oupton@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-23KVM: nVMX: Refactor IO bitmap checks into helper functionOliver Upton
Checks against the IO bitmap are useful for both instruction emulation and VM-exit reflection. Refactor the IO bitmap checks into a helper function. Signed-off-by: Oliver Upton <oupton@google.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-23KVM: nVMX: Don't emulate instructions in guest modePaolo Bonzini
vmx_check_intercept is not yet fully implemented. To avoid emulating instructions disallowed by the L1 hypervisor, refuse to emulate instructions by default. Cc: stable@vger.kernel.org [Made commit, added commit msg - Oliver] Signed-off-by: Oliver Upton <oupton@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-23KVM: nVMX: Emulate MTF when performing instruction emulationOliver Upton
Since commit 5f3d45e7f282 ("kvm/x86: add support for MONITOR_TRAP_FLAG"), KVM has allowed an L1 guest to use the monitor trap flag processor-based execution control for its L2 guest. KVM simply forwards any MTF VM-exits to the L1 guest, which works for normal instruction execution. However, when KVM needs to emulate an instruction on the behalf of an L2 guest, the monitor trap flag is not emulated. Add the necessary logic to kvm_skip_emulated_instruction() to synthesize an MTF VM-exit to L1 upon instruction emulation for L2. Fixes: 5f3d45e7f282 ("kvm/x86: add support for MONITOR_TRAP_FLAG") Signed-off-by: Oliver Upton <oupton@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-23KVM: fix error handling in svm_hardware_setupLi RongQing
rename svm_hardware_unsetup as svm_hardware_teardown, move it before svm_hardware_setup, and call it to free all memory if fail to setup in svm_hardware_setup, otherwise memory will be leaked remove __exit attribute for it since it is called in __init function Signed-off-by: Li RongQing <lirongqing@baidu.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-21KVM: SVM: Fix potential memory leak in svm_cpu_init()Miaohe Lin
When kmalloc memory for sd->sev_vmcbs failed, we forget to free the page held by sd->save_area. Also get rid of the var r as '-ENOMEM' is actually the only possible outcome here. Reviewed-by: Liran Alon <liran.alon@oracle.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-21KVM: apic: avoid calculating pending eoi from an uninitialized valMiaohe Lin
When pv_eoi_get_user() fails, 'val' may remain uninitialized and the return value of pv_eoi_get_pending() becomes random. Fix the issue by initializing the variable. Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-21KVM: nVMX: clear PIN_BASED_POSTED_INTR from nested pinbased_ctls only when ↵Vitaly Kuznetsov
apicv is globally disabled When apicv is disabled on a vCPU (e.g. by enabling KVM_CAP_HYPERV_SYNIC*), nothing happens to VMX MSRs on the already existing vCPUs, however, all new ones are created with PIN_BASED_POSTED_INTR filtered out. This is very confusing and results in the following picture inside the guest: $ rdmsr -ax 0x48d ff00000016 7f00000016 7f00000016 7f00000016 This is observed with QEMU and 4-vCPU guest: QEMU creates vCPU0, does KVM_CAP_HYPERV_SYNIC2 and then creates the remaining three. L1 hypervisor may only check CPU0's controls to find out what features are available and it will be very confused later. Switch to setting PIN_BASED_POSTED_INTR control based on global 'enable_apicv' setting. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-21KVM: nVMX: handle nested posted interrupts when apicv is disabled for L1Vitaly Kuznetsov
Even when APICv is disabled for L1 it can (and, actually, is) still available for L2, this means we need to always call vmx_deliver_nested_posted_interrupt() when attempting an interrupt delivery. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-21kvm: x86: svm: Fix NULL pointer dereference when AVIC not enabledSuravee Suthikulpanit
Launching VM w/ AVIC disabled together with pass-through device results in NULL pointer dereference bug with the following call trace. RIP: 0010:svm_refresh_apicv_exec_ctrl+0x17e/0x1a0 [kvm_amd] Call Trace: kvm_vcpu_update_apicv+0x44/0x60 [kvm] kvm_arch_vcpu_ioctl_run+0x3f4/0x1c80 [kvm] kvm_vcpu_ioctl+0x3d8/0x650 [kvm] do_vfs_ioctl+0xaa/0x660 ? tomoyo_file_ioctl+0x19/0x20 ksys_ioctl+0x67/0x90 __x64_sys_ioctl+0x1a/0x20 do_syscall_64+0x57/0x190 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Investigation shows that this is due to the uninitialized usage of struct vapu_svm.ir_list in the svm_set_pi_irte_mode(), which is called from svm_refresh_apicv_exec_ctrl(). The ir_list is initialized only if AVIC is enabled. So, fixes by adding a check if AVIC is enabled in the svm_refresh_apicv_exec_ctrl(). Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=206579 Fixes: 8937d762396d ("kvm: x86: svm: Add support to (de)activate posted interrupts.") Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Tested-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-21KVM: VMX: Add VMX_FEATURE_USR_WAIT_PAUSEXiaoyao Li
Commit 159348784ff0 ("x86/vmx: Introduce VMX_FEATURES_*") missed bit 26 (enable user wait and pause) of Secondary Processor-based VM-Execution Controls. Add VMX_FEATURE_USR_WAIT_PAUSE flag so that it shows up in /proc/cpuinfo, and use it to define SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE to make them uniform. Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-21KVM: nVMX: Hold KVM's srcu lock when syncing vmcs12->shadowwanpeng li
For the duration of mapping eVMCS, it derefences ->memslots without holding ->srcu or ->slots_lock when accessing hv assist page. This patch fixes it by moving nested_sync_vmcs12_to_shadow to prepare_guest_switch, where the SRCU is already taken. It can be reproduced by running kvm's evmcs_test selftest. ============================= warning: suspicious rcu usage 5.6.0-rc1+ #53 tainted: g w ioe ----------------------------- ./include/linux/kvm_host.h:623 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by evmcs_test/8507: #0: ffff9ddd156d00d0 (&vcpu->mutex){+.+.}, at: kvm_vcpu_ioctl+0x85/0x680 [kvm] stack backtrace: cpu: 6 pid: 8507 comm: evmcs_test tainted: g w ioe 5.6.0-rc1+ #53 hardware name: dell inc. optiplex 7040/0jctf8, bios 1.4.9 09/12/2016 call trace: dump_stack+0x68/0x9b kvm_read_guest_cached+0x11d/0x150 [kvm] kvm_hv_get_assist_page+0x33/0x40 [kvm] nested_enlightened_vmentry+0x2c/0x60 [kvm_intel] nested_vmx_handle_enlightened_vmptrld.part.52+0x32/0x1c0 [kvm_intel] nested_sync_vmcs12_to_shadow+0x439/0x680 [kvm_intel] vmx_vcpu_run+0x67a/0xe60 [kvm_intel] vcpu_enter_guest+0x35e/0x1bc0 [kvm] kvm_arch_vcpu_ioctl_run+0x40b/0x670 [kvm] kvm_vcpu_ioctl+0x370/0x680 [kvm] ksys_ioctl+0x235/0x850 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x77/0x780 entry_syscall_64_after_hwframe+0x49/0xbe Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-21KVM: x86: don't notify userspace IOAPIC on edge-triggered interrupt EOIMiaohe Lin
Commit 13db77347db1 ("KVM: x86: don't notify userspace IOAPIC on edge EOI") said, edge-triggered interrupts don't set a bit in TMR, which means that IOAPIC isn't notified on EOI. And var level indicates level-triggered interrupt. But commit 3159d36ad799 ("KVM: x86: use generic function for MSI parsing") replace var level with irq.level by mistake. Fix it by changing irq.level to irq.trig_mode. Cc: stable@vger.kernel.org Fixes: 3159d36ad799 ("KVM: x86: use generic function for MSI parsing") Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-20kvm/emulate: fix a -Werror=cast-function-typeQian Cai
arch/x86/kvm/emulate.c: In function 'x86_emulate_insn': arch/x86/kvm/emulate.c:5686:22: error: cast between incompatible function types from 'int (*)(struct x86_emulate_ctxt *)' to 'void (*)(struct fastop *)' [-Werror=cast-function-type] rc = fastop(ctxt, (fastop_t)ctxt->execute); Fix it by using an unnamed union of a (*execute) function pointer and a (*fastop) function pointer. Fixes: 3009afc6e39e ("KVM: x86: Use a typedef for fastop functions") Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Qian Cai <cai@lca.pw> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-20KVM: x86: fix incorrect comparison in trace eventPaolo Bonzini
The "u" field in the event has three states, -1/0/1. Using u8 however means that comparison with -1 will always fail, so change to signed char. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-17KVM: nVMX: Fix some obsolete comments and grammar errorMiaohe Lin
Fix wrong variable names and grammar error in comment. Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-17KVM: x86: fix missing prototypesPaolo Bonzini
Reported with "make W=1" due to -Wmissing-prototypes. Reported-by: Qian Cai <cai@lca.pw> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12KVM: x86: enable -WerrorPaolo Bonzini
Avoid more embarrassing mistakes. At least those that the compiler can catch. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: virt: guest-halt-polling.txt convert to ReSTMauro Carvalho Chehab
Due to some merge conflict, this file ended being alone under Documentation/virtual. The file itself is almost at ReST format. Just minor adjustments are needed: - Adjust title markup; - Adjust a list identation; - add a literal block markup; - Add some blank lines. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: review-checklist.txt: rename to ReSTMauro Carvalho Chehab
This file is already in ReST compatible format. So, rename it and add to the kvm's index.rst. While here, use the standard conversion for document titles. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: Convert timekeeping.txt to ReST formatMauro Carvalho Chehab
- Use document title and chapter markups; - Add markups for literal blocks; - Add markups for tables; - use :field: for field descriptions; - Add blank lines and adjust indentation. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: Convert s390-diag.txt to ReST formatMauro Carvalho Chehab
This file is almost in ReST format. Just one change was needed: - Add markups for a literal block and change its indentation. While here, use the standard markup for the document title. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: Convert ppc-pv.txt to ReST formatMauro Carvalho Chehab
- Use document title and chapter markups; - Add markups for tables; - Use list markups; - Add markups for literal blocks; - Add blank lines. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: Convert nested-vmx.txt to ReST formatMauro Carvalho Chehab
This file is almost in ReST format. Just a small set of changes were needed: - Add markups for lists; - Add markups for a literal block; - Adjust whitespaces. While here, use the standard markup for the document title. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: Convert mmu.txt to ReST formatMauro Carvalho Chehab
- Use document title and chapter markups; - Add markups for tables; - Add markups for literal blocks; - Add blank lines and adjust indentation. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: Convert locking.txt to ReST formatMauro Carvalho Chehab
- Use document title and chapter markups; - Add markups for literal blocks; - use :field: for field descriptions; - Add blank lines and adjust indentation. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: Convert hypercalls.txt to ReST formatMauro Carvalho Chehab
- Use document title and chapter markups; - Convert tables; - Add markups for literal blocks; - use :field: for field descriptions; - Add blank lines and adjust indentation Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: arm/psci.txt: convert to ReSTMauro Carvalho Chehab
- Add a title for the document; - Adjust whitespaces for it to be properly formatted after parsed. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert arm/hyp-abi.txt to ReSTMauro Carvalho Chehab
- Add proper markups for titles; - Adjust whitespaces and blank lines to match ReST needs; - Mark literal blocks as such. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: Convert api.txt to ReST formatMauro Carvalho Chehab
convert api.txt document to ReST format while trying to keep its format as close as possible with the authors intent, and avoid adding uneeded markups. - Use document title and chapter markups; - Convert tables; - Add markups for literal blocks; - use :field: for field descriptions; - Add blank lines and adjust indentation Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert devices/xive.txt to ReSTMauro Carvalho Chehab
- Use title markups; - adjust indentation and add blank lines as needed; - adjust tables to match ReST accepted formats; - mark code blocks as such. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert devices/xics.txt to ReSTMauro Carvalho Chehab
- Use title markups; - adjust indentation and add blank lines as needed; - adjust tables to match ReST accepted formats; - use :field: markups. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert devices/vm.txt to ReSTMauro Carvalho Chehab
- Use title markups; - adjust indentation and add blank lines as needed; - use :field: markups; - Use cross-references; - mark code blocks as such. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert devices/vfio.txt to ReSTMauro Carvalho Chehab
- Use standard title markup; - adjust lists; - mark code blocks as such. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert devices/vcpu.txt to ReSTMauro Carvalho Chehab
- Use title markups; - adjust indentation and add blank lines as needed; - adjust tables to match ReST accepted formats; - use :field: markups; - mark code blocks as such. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert devices/s390_flic.txt to ReSTMauro Carvalho Chehab
- Use standard markup for document title; - Adjust indentation and add blank lines as needed; - use the notes markup; - mark code blocks as such. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert devices/mpic.txt to ReSTMauro Carvalho Chehab
This document is almost in ReST format. The only thing needed is to mark a list as such and to add an extra whitespace. Yet, let's also use the standard document title markup, as it makes easier if anyone wants later to add sessions to it. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: convert devices/arm-vgit.txt to ReSTMauro Carvalho Chehab
- Use title markups; - change indent to match ReST syntax; - use proper table markups; - use literal block markups. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: devices/arm-vgit-v3.txt to ReSTMauro Carvalho Chehab
- Use title markups; - change indent to match ReST syntax; - use proper table markups; - use literal block markups. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: kvm: devices/arm-vgic-its.txt to ReST formatMauro Carvalho Chehab
- Fix document title to match ReST format - Convert the table to be properly recognized - use proper markups for literal blocks - Some indentation fixes to match ReST While here, add an index for kvm devices. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: virt: Convert msr.txt to ReST formatMauro Carvalho Chehab
- Use document title markup; - Convert tables; - Add blank lines and adjust indentation. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-02-12docs: virt: convert halt-polling.txt to ReST formatMauro Carvalho Chehab
- Fix document title to match ReST format - Convert the table to be properly recognized - Some indentation fixes to match ReST syntax. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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