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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 | |
| parent | 4baeb964d96d38dff461af5b9d578f0a9ba67617 (diff) | |
| download | blackbird-op-linux-ddd6f9537dee9b713b87ecdc9ac920cd1935fdef.tar.gz blackbird-op-linux-ddd6f9537dee9b713b87ecdc9ac920cd1935fdef.zip | |
[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')
| -rw-r--r-- | arch/s390/include/asm/lowcore.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/asm-offsets.c | 1 | ||||
| -rw-r--r-- | arch/s390/kernel/entry64.S | 7 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 1 |
4 files changed, 6 insertions, 5 deletions
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h index 9e13c7d56cc1..3b97964e0e96 100644 --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -271,7 +271,7 @@ struct _lowcore { __u64 machine_flags; /* 0x0360 */ __u64 ftrace_func; /* 0x0368 */ __u64 gmap; /* 0x0370 */ - __u64 cmf_hpp; /* 0x0378 */ + __u8 pad_0x0378[0x0380-0x0378]; /* 0x0378 */ /* Interrupt response block. */ __u8 irb[64]; /* 0x0380 */ diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c index 751318765e2e..0717363033eb 100644 --- a/arch/s390/kernel/asm-offsets.c +++ b/arch/s390/kernel/asm-offsets.c @@ -150,7 +150,6 @@ int main(void) DEFINE(__LC_LAST_BREAK, offsetof(struct _lowcore, breaking_event_addr)); DEFINE(__LC_VDSO_PER_CPU, offsetof(struct _lowcore, vdso_per_cpu_data)); DEFINE(__LC_GMAP, offsetof(struct _lowcore, gmap)); - DEFINE(__LC_CMF_HPP, offsetof(struct _lowcore, cmf_hpp)); DEFINE(__GMAP_ASCE, offsetof(struct gmap, asce)); #endif /* CONFIG_32BIT */ return 0; 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 diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 66903eed36e6..fc83f1f15138 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -400,7 +400,6 @@ setup_lowcore(void) __ctl_set_bit(14, 29); } #else - lc->cmf_hpp = -1ULL; lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0]; #endif lc->sync_enter_timer = S390_lowcore.sync_enter_timer; |
