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From: Juergen Gross <jgross@suse.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org,
	xen-devel@lists.xensource.com, konrad.wilk@oracle.com,
	david.vrabel@citrix.com, boris.ostrovsky@oracle.com,
	tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
	mmarek@suse.cz, linux-kbuild@vger.kernel.org
Cc: Juergen Gross <jgross@suse.com>
Subject: [RESEND Patch V2 1/4] xen: build infrastructure for generating hypercall depending symbols
Date: Wed, 21 Jan 2015 08:49:22 +0100	[thread overview]
Message-ID: <1421826565-10826-2-git-send-email-jgross@suse.com> (raw)
In-Reply-To: <1421826565-10826-1-git-send-email-jgross@suse.com>

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: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
---
 arch/x86/syscalls/Makefile |  9 +++++++++
 scripts/xen-hypercalls.sh  | 12 ++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 scripts/xen-hypercalls.sh

diff --git a/arch/x86/syscalls/Makefile b/arch/x86/syscalls/Makefile
index 3323c27..a55abb9 100644
--- a/arch/x86/syscalls/Makefile
+++ b/arch/x86/syscalls/Makefile
@@ -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)
 
diff --git a/scripts/xen-hypercalls.sh b/scripts/xen-hypercalls.sh
new file mode 100644
index 0000000..676d922
--- /dev/null
+++ b/scripts/xen-hypercalls.sh
@@ -0,0 +1,12 @@
+#!/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
-- 
2.1.2


  reply	other threads:[~2015-01-21  7:49 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-21  7:49 [RESEND Patch V2 0/4] xen: auto-generate symbols for xen hypercalls Juergen Gross
2015-01-21  7:49 ` Juergen Gross [this message]
2015-01-28  5:11   ` [RESEND Patch V2 1/4] xen: build infrastructure for generating hypercall depending symbols Juergen Gross
2015-02-06 15:00     ` Juergen Gross
2015-02-19  0:00     ` Ingo Molnar
2015-02-13  5:33   ` Juergen Gross
2015-02-18 23:59   ` Ingo Molnar
2015-01-21  7:49 ` [RESEND Patch V2 2/4] xen: synchronize include/xen/interface/xen.h with xen Juergen Gross
2015-01-21  7:49 ` [RESEND Patch V2 3/4] xen: use generated hypervisor symbols in arch/x86/xen/trace.c Juergen Gross
2015-01-21  7:49 ` [RESEND Patch V2 4/4] xen: use generated hypercall symbols in arch/x86/xen/xen-head.S Juergen Gross
2015-03-02 11:00 ` [Xen-devel] [RESEND Patch V2 0/4] xen: auto-generate symbols for xen hypercalls David Vrabel

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