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8a9949bc71
Xen's raw SYSCALL entries are much less weird than native. Rather than fudging them to look like native entries, use the Xen-provided stack frame directly. This lets us eliminate entry_SYSCALL_64_after_swapgs and two uses of the SWAPGS_UNSAFE_STACK paravirt hook. The SYSENTER code would benefit from similar treatment. This makes one change to the native code path: the compat instruction that clears the high 32 bits of %rax is moved slightly later. I'd be surprised if this affects performance at all. Tested-by: Juergen Gross <jgross@suse.com> Signed-off-by: Andy Lutomirski <luto@kernel.org> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Borislav Petkov <bpetkov@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/7c88ed36805d36841ab03ec3b48b4122c4418d71.1502164668.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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.. | ||
apic.c | ||
debugfs.c | ||
debugfs.h | ||
efi.c | ||
enlighten.c | ||
enlighten_hvm.c | ||
enlighten_pv.c | ||
enlighten_pvh.c | ||
grant-table.c | ||
irq.c | ||
Kconfig | ||
Makefile | ||
mmu.c | ||
mmu.h | ||
mmu_hvm.c | ||
mmu_pv.c | ||
multicalls.c | ||
multicalls.h | ||
p2m.c | ||
pci-swiotlb-xen.c | ||
platform-pci-unplug.c | ||
pmu.c | ||
pmu.h | ||
setup.c | ||
smp.c | ||
smp.h | ||
smp_hvm.c | ||
smp_pv.c | ||
spinlock.c | ||
suspend.c | ||
suspend_hvm.c | ||
suspend_pv.c | ||
time.c | ||
trace.c | ||
vdso.h | ||
vga.c | ||
xen-asm.h | ||
xen-asm.S | ||
xen-asm_32.S | ||
xen-asm_64.S | ||
xen-head.S | ||
xen-ops.h | ||
xen-pvh.S |