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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-12-27 11:27:13 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-12-27 11:27:12 +0100 |
| commit | ddd6f9537dee9b713b87ecdc9ac920cd1935fdef (patch) | |
| tree | eb5e1ce346620b33052fca64f4e51a2497d3fe6d /arch/s390/kernel/entry64.S | |
| parent | 4baeb964d96d38dff461af5b9d578f0a9ba67617 (diff) | |
[S390] kvm: move cmf host id constant out of lowcore
There is no reason for the cpu-measurement-facility host id constant to
reside in the lowcore where space is precious. Use an entry in the literal
pool in HANDLE_SIE_INTERCEPT and a stack slot in sie64a.
While we are at it replace the id -1 with 0 to indicate host execution.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/entry64.S')
| -rw-r--r-- | arch/s390/kernel/entry64.S | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S index 83a93747e2fd..130fb02305c1 100644 --- a/arch/s390/kernel/entry64.S +++ b/arch/s390/kernel/entry64.S @@ -71,7 +71,7 @@ _TIF_EXIT_SIE = (_TIF_SIGPENDING | _TIF_NEED_RESCHED | _TIF_MCCK_PENDING) #if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE) tm __TI_flags+6(%r12),_TIF_SIE>>8 jz 0f - SPP __LC_CMF_HPP # set host id + SPP BASED(.Lhost_id) # set host id clc SP_PSW+8(8,%r15),BASED(.Lsie_loop) jl 0f clc SP_PSW+8(8,%r15),BASED(.Lsie_done) @@ -1054,6 +1054,7 @@ ENTRY(sie64a) stmg %r6,%r14,__SF_GPRS(%r15) # save kernel registers stg %r2,__SF_EMPTY(%r15) # save control block pointer stg %r3,__SF_EMPTY+8(%r15) # save guest register save area + xc __SF_EMPTY+16(8,%r15),__SF_EMPTY+16(%r15) # host id == 0 lmg %r0,%r13,0(%r3) # load guest gprs 0-13 lg %r14,__LC_THREAD_INFO # pointer thread_info struct oi __TI_flags+6(%r14),_TIF_SIE>>8 @@ -1070,7 +1071,7 @@ sie_gmap: SPP __SF_EMPTY(%r15) # set guest id sie 0(%r14) sie_done: - SPP __LC_CMF_HPP # set host id + SPP __SF_EMPTY+16(%r15) # set host id lg %r14,__LC_THREAD_INFO # pointer thread_info struct sie_exit: lctlg %c1,%c1,__LC_USER_ASCE # load primary asce @@ -1095,6 +1096,8 @@ sie_fault: .quad sie_loop .Lsie_done: .quad sie_done +.Lhost_id: + .quad 0 .section __ex_table,"a" .quad sie_loop,sie_fault |