Re: [PATCH kvm-kmod] adjust timekeeping compatibility code

[Paolo Bonzini <pbonzini@redhat.com>]

Il 30/09/2014 09:54, Jan Kiszka ha scritto:
>> > kvm_get_xtime_nsec could overflow.  If we make kvm_get_boot_base_ns
>> > compute the equivalent of 3.17's base_mono+offs_boot formula (instead of
>> > just offs_boot), we can avoid that and drop kvm_get_xtime_nsec altogether.
> Applied, thanks.
> 
> Any suggestions how to deal with "kvm: Fix page ageing bugs"?

If you mean the new MMU notifier API, probably something like this:

diff --git a/sync b/sync
index 8b63ca7..fff85f3 100755
--- a/sync
+++ b/sync
@@ -310,6 +310,22 @@ def hack_content(fname, data):
             else:
                 w(sub(r'tkr\.', '', line))
             line = '#endif'
+        if match_block_end('^static int kvm_mmu_notifier_clear_flush_young', '^}'):
+            w(line)
+            w('#if LINUX_VERSION_CODE < KERNEL_VERSION(3,18,0)')
+            w('static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn,')
+            w('                                              struct mm_struct *mm,')
+            w('                                              unsigned long hva)')
+            w('{')
+            w('\treturn __kvm_mmu_notifier_clear_flush_young(mn, mm, hva, hva+1);')
+            w('}')
+            line = '#endif'
+        if match(r'^static int kvm_mmu_notifier_clear_flush_young'):
+            w('#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,18,0)')
+            w(line)
+            w('#else')
+            w(sub('kvm_', '__kvm_', line))
+            line = '#endif'
         if line == '#ifdef CONFIG_KEXEC':
             line = '#if defined(CONFIG_KEXEC) && LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)'
         if line == '\tif (!cpu_has_vmx_apicv())':

(Not tested beyond compilation).

Paolo