Messages in this thread | | | Date | Mon, 23 Feb 2015 11:16:24 -0500 | From | Boris Ostrovsky <> | Subject | Re: [PATCH] x86/xen: Initialize cr4 shadow for 64-bit PV(H) guests |
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On 02/23/2015 11:09 AM, Andy Lutomirski wrote: > On Mon, Feb 23, 2015 at 8:01 AM, Boris Ostrovsky > <boris.ostrovsky@oracle.com> wrote: >> Commit 1e02ce4cccdc ("x86: Store a per-cpu shadow copy of CR4") >> introduced CR4 shadows. >> >> These shadows are initialized in early boot code. The commit missed >> initialization for 64-bit PV(H) guests that this patch adds. > Whoops, worry. > > This is needed for 3.21, right?
It would have been 3.20, I think. Which is now 4.0.
-boris
> > --Andy > >> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> >> --- >> arch/x86/xen/enlighten.c | 1 + >> 1 files changed, 1 insertions(+), 0 deletions(-) >> >> diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c >> index bd8b845..7393f3e 100644 >> --- a/arch/x86/xen/enlighten.c >> +++ b/arch/x86/xen/enlighten.c >> @@ -1741,6 +1741,7 @@ asmlinkage __visible void __init xen_start_kernel(void) >> #ifdef CONFIG_X86_32 >> i386_start_kernel(); >> #else >> + cr4_init_shadow(); /* 32b kernel does this in i386_start_kernel() */ >> x86_64_start_reservations((char *)__pa_symbol(&boot_params)); >> #endif >> } >> -- >> 1.7.1 >> > >
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