path: root/arch/s390/include/uapi/asm/ucontext.h
diff options
authorMartin Schwidefsky <schwidefsky@de.ibm.com>2014-10-06 17:53:53 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-10-09 09:14:13 +0200
commit8070361799ae1e3f4ef347bd10f0a508ac10acfb (patch)
tree9846c0633cd28a86dc62eca55a4268fed513fcfd /arch/s390/include/uapi/asm/ucontext.h
parent42f4dd613fe808676126472bbe1283e452201148 (diff)
s390: add support for vector extension
The vector extension introduces 32 128-bit vector registers and a set of instruction to operate on the vector registers. The kernel can control the use of vector registers for the problem state program with a bit in control register 0. Once enabled for a process the kernel needs to retain the content of the vector registers on context switch. The signal frame is extended to include the vector registers. Two new register sets NT_S390_VXRS_LOW and NT_S390_VXRS_HIGH are added to the regset interface for the debugger and core dumps. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/uapi/asm/ucontext.h')
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/s390/include/uapi/asm/ucontext.h b/arch/s390/include/uapi/asm/ucontext.h
index 3e077b2a4705..64a69aa5dde0 100644
--- a/arch/s390/include/uapi/asm/ucontext.h
+++ b/arch/s390/include/uapi/asm/ucontext.h
@@ -7,10 +7,15 @@
#ifndef _ASM_S390_UCONTEXT_H
#define _ASM_S390_UCONTEXT_H
-#define UC_EXTENDED 0x00000001
-#ifndef __s390x__
+#define UC_GPRS_HIGH 1 /* uc_mcontext_ext has valid high gprs */
+#define UC_VXRS 2 /* uc_mcontext_ext has valid vector regs */
+ * The struct ucontext_extended describes how the registers are stored
+ * on a rt signal frame. Please note that the structure is not fixed,
+ * if new CPU registers are added to the user state the size of the
+ * struct ucontext_extended will increase.
+ */
struct ucontext_extended {
unsigned long uc_flags;
struct ucontext *uc_link;
@@ -19,11 +24,9 @@ struct ucontext_extended {
sigset_t uc_sigmask;
/* Allow for uc_sigmask growth. Glibc uses a 1024-bit sigset_t. */
unsigned char __unused[128 - sizeof(sigset_t)];
- unsigned long uc_gprs_high[16];
+ _sigregs_ext uc_mcontext_ext;
struct ucontext {
unsigned long uc_flags;
struct ucontext *uc_link;

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