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 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
