[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 0/3] Fix and cleanup for 32-bit PV sysexit
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. As result of this patch irq_enable_sysexit and usergs_sysret32 pv ops are not used anymore by anyone and so can be removed. v2: * patch both TEST and JZ intructions with a single JMP * Add magic prefix to X86_FEATURE_XENPV comment to avoid having it printed in /proc/cpuinfo * Clarify in commit messages why irq_enable_sysexit and usergs_sysret32 are 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 | 13 +++++-------- arch/x86/entry/entry_64_compat.S | 20 ++++++++------------ 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, 17 insertions(+), 110 deletions(-) -- 1.8.1.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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