Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 9b4ade22 authored by Juergen Gross's avatar Juergen Gross Committed by David Vrabel
Browse files

xen: build infrastructure for generating hypercall depending symbols 



Today there are several places in the kernel which build tables
containing one entry for each possible Xen hypercall. Create an
infrastructure to be able to generate these tables at build time.

Based-on-patch-by: default avatarJan Beulich <jbeulich@suse.com>
Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
Reviewed-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
Acked-by: default avatarIngo Molnar <mingo@kernel.org>
Signed-off-by: default avatarDavid Vrabel <david.vrabel@citrix.com>
parent b6a473a7

arch/x86/syscalls/Makefile

+9 −0
Original line number Diff line number Diff line
@@ -19,6 +19,9 @@ quiet_cmd_syshdr = SYSHDR $@ 
quiet_cmd_systbl = SYSTBL  $@

      cmd_systbl = $(CONFIG_SHELL) '$(systbl)' $< $@



quiet_cmd_hypercalls = HYPERCALLS $@

      cmd_hypercalls = $(CONFIG_SHELL) '$<' $@ $(filter-out $<,$^)



syshdr_abi_unistd_32 := i386

$(uapi)/unistd_32.h: $(syscall32) $(syshdr)

	$(call if_changed,syshdr)
@@ -47,10 +50,16 @@ $(out)/syscalls_32.h: $(syscall32) $(systbl) 
$(out)/syscalls_64.h: $(syscall64) $(systbl)

	$(call if_changed,systbl)



$(out)/xen-hypercalls.h: $(srctree)/scripts/xen-hypercalls.sh

	$(call if_changed,hypercalls)



$(out)/xen-hypercalls.h: $(srctree)/include/xen/interface/xen*.h



uapisyshdr-y			+= unistd_32.h unistd_64.h unistd_x32.h

syshdr-y			+= syscalls_32.h

syshdr-$(CONFIG_X86_64)		+= unistd_32_ia32.h unistd_64_x32.h

syshdr-$(CONFIG_X86_64)		+= syscalls_64.h

syshdr-$(CONFIG_XEN)		+= xen-hypercalls.h



targets	+= $(uapisyshdr-y) $(syshdr-y)

scripts/xen-hypercalls.sh

0 → 100644
+12 −0
Original line number Diff line number Diff line 
#!/bin/sh

out="$1"

shift

in="$@"



for i in $in; do

	eval $CPP $LINUXINCLUDE -dD -imacros "$i" -x c /dev/null

done | \

awk '$1 == "#define" && $2 ~ /__HYPERVISOR_[a-z][a-z_0-9]*/ { v[$3] = $2 }

	END {   print "/* auto-generated by scripts/xen-hypercall.sh */"

		for (i in v) if (!(v[i] in v))

			print "HYPERCALL("substr(v[i], 14)")"}' | sort -u >$out