On Thu, Nov 19, 2015 at 04:55:44PM -0500, Boris Ostrovsky wrote: > 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(-) All three look good to me. Reviewed-by: Borislav Petkov <bp@xxxxxxx> -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) -- _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization