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Groups > linux.kernel > #1272526
| From | Boris Ostrovsky <boris.ostrovsky@oracle.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 0/3] Fix and cleanup for 32-bit PV sysexit |
| Date | 2015-11-18 21:10 +0100 |
| Message-ID | <qwhdg-7Lc-9@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike the earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit (and sysret32 in compat mode) pv ops, as suggested by Andy. (I ended up patching TEST with XOR to avoid extra NOPs, even though I said yesterday it would be wrong. It's not wrong) As result of this patch irq_enable_sysexit and usergs_sysret32 pv ops are not used anymore by anyone and so can be removed. Boris Ostrovsky (3): x86/xen: Avoid fast syscall path for Xen PV guests x86: irq_enable_sysexit pv op is no longer needed x86: usergs_sysret32 pv op is no longer needed arch/x86/entry/entry_32.S | 11 ++++------- arch/x86/entry/entry_64_compat.S | 16 ++++++---------- arch/x86/include/asm/cpufeature.h | 1 + arch/x86/include/asm/paravirt.h | 12 ------------ arch/x86/include/asm/paravirt_types.h | 17 ----------------- arch/x86/kernel/asm-offsets.c | 3 --- arch/x86/kernel/asm-offsets_64.c | 1 - arch/x86/kernel/paravirt.c | 12 ------------ arch/x86/kernel/paravirt_patch_32.c | 2 -- arch/x86/kernel/paravirt_patch_64.c | 3 --- arch/x86/xen/enlighten.c | 7 +++---- arch/x86/xen/xen-asm_32.S | 14 -------------- arch/x86/xen/xen-asm_64.S | 19 ------------------- arch/x86/xen/xen-ops.h | 3 --- 14 files changed, 14 insertions(+), 107 deletions(-) -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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[PATCH 0/3] Fix and cleanup for 32-bit PV sysexit Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2015-11-18 21:10 +0100
[PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2015-11-18 21:10 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Andy Lutomirski <luto@amacapital.net> - 2015-11-18 21:30 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Borislav Petkov <bp@suse.de> - 2015-11-18 21:50 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Brian Gerst <brgerst@gmail.com> - 2015-11-18 22:00 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Andy Lutomirski <luto@amacapital.net> - 2015-11-18 22:00 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2015-11-18 23:10 +0100
Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests Borislav Petkov <bp@suse.de> - 2015-11-19 13:10 +0100
Re: [PATCH 0/3] Fix and cleanup for 32-bit PV sysexit Borislav Petkov <bp@suse.de> - 2015-11-19 13:20 +0100
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