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Groups > linux.kernel > #1342058
| From | Andrew Cooper <andrew.cooper3@citrix.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [Xen-devel] [PATCH] xen/x86: Zero out .bss for PV guests |
| Date | 2016-02-24 15:20 +0100 |
| Message-ID | <r5Isi-5Lf-11@gated-at.bofh.it> (permalink) |
| References | <r56Q3-3YI-45@gated-at.bofh.it> <r5Isi-5Lf-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 24/02/16 14:12, David Vrabel wrote: > On 22/02/16 22:06, Boris Ostrovsky wrote: >> Baremetal kernels clear .bss early in the boot. Since Xen PV guests don't >> excecute that early code they should do it too. >> >> (Since we introduce macros for specifying 32- and 64-bit registers we >> can get rid of ifdefs in startup_xen()) > .bss must have been cleared for PV guests otherwise they would be > horribly broken. What was the method and why is it no longer sufficient? The domain builder hands out zeroed pages. I don't believe we guarantee that the guests RAM is clean, but it is in practice. ~Andrew
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Re: [Xen-devel] [PATCH] xen/x86: Zero out .bss for PV guests David Vrabel <david.vrabel@citrix.com> - 2016-02-24 15:20 +0100
Re: [Xen-devel] [PATCH] xen/x86: Zero out .bss for PV guests Andrew Cooper <andrew.cooper3@citrix.com> - 2016-02-24 15:20 +0100
Re: [Xen-devel] [PATCH] xen/x86: Zero out .bss for PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-02-24 16:00 +0100
Re: [Xen-devel] [PATCH] xen/x86: Zero out .bss for PV guests David Vrabel <david.vrabel@citrix.com> - 2016-02-24 16:00 +0100
Re: [Xen-devel] [PATCH] xen/x86: Zero out .bss for PV guests "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-02-24 17:30 +0100
Re: [Xen-devel] [PATCH] xen/x86: Zero out .bss for PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-02-24 17:50 +0100
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