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Diffstat (limited to 'arch/s390/kvm/sie64a.S')
| -rw-r--r-- | arch/s390/kvm/sie64a.S | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/s390/kvm/sie64a.S b/arch/s390/kvm/sie64a.S new file mode 100644 index 000000000000..934fd6a885f6 --- /dev/null +++ b/arch/s390/kvm/sie64a.S @@ -0,0 +1,47 @@ +/* + * sie64a.S - low level sie call + * + * Copyright IBM Corp. 2008 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License (version 2 only) + * as published by the Free Software Foundation. + * + * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com> + */ + +#include <linux/errno.h> +#include <asm/asm-offsets.h> + +SP_R5 = 5 * 8 # offset into stackframe +SP_R6 = 6 * 8 + +/* + * sie64a calling convention: + * %r2 pointer to sie control block + * %r3 guest register save area + */ + .globl sie64a +sie64a: + lgr %r5,%r3 + stmg %r5,%r14,SP_R5(%r15) # save register on entry + lgr %r14,%r2 # pointer to sie control block + lmg %r0,%r13,0(%r3) # load guest gprs 0-13 +sie_inst: + sie 0(%r14) + lg %r14,SP_R5(%r15) + stmg %r0,%r13,0(%r14) # save guest gprs 0-13 + lghi %r2,0 + lmg %r6,%r14,SP_R6(%r15) + br %r14 + +sie_err: + lg %r14,SP_R5(%r15) + stmg %r0,%r13,0(%r14) # save guest gprs 0-13 + lghi %r2,-EFAULT + lmg %r6,%r14,SP_R6(%r15) + br %r14 + + .section __ex_table,"a" + .quad sie_inst,sie_err + .previous |