s390 updates for 6.3 merge window part 2

- Add empty command line parameter handling stubs to kernel for all command
   line parameters which are handled in the decompressor. This avoids
   invalid "Unknown kernel command line parameters" messages from the
   kernel, and also avoids that these will be incorrectly passed to user
   space. This caused already confusion, therefore add the empty stubs
 
 - Add missing phys_to_virt() handling to machine check handler
 
 - Introduce and use a union to be used for zcrypt inline assemblies. This
   makes sure that only a register wide member of the union is passed as
   input and output parameter to inline assemblies, while usual C code uses
   other members of the union to access bit fields of it
 
 - Add and use a READ_ONCE_ALIGNED_128() macro, which can be used to
   atomically read a 128-bit value from memory. This replaces the (mis-)use
   of the 128-bit cmpxchg operation to do the same in cpum_sf code.
   Currently gcc does not generate the used lpq instruction if __READ_ONCE()
   is used for aligned 128-bit accesses, therefore use this s390 specific
   helper
 
 - Simplify machine check handler code if a task needs to be killed because
   of e.g. register corruption due to a machine malfunction
 
 - Perform CPU reset to clear pending interrupts and TLB entries on an
   already stopped target CPU before delegating work to it
 
 - Generate arch/s390/boot/vmlinux.map link map for the decompressor, when
   CONFIG_VMLINUX_MAP is enabled for debugging purposes
 
 - Fix segment type handling for dcssblk devices. It incorrectly always
   returned type "READ/WRITE" even for read-only segements, which can result
   in a kernel panic if somebody tries to write to a read-only device
 
 - Sort config S390 select list again
 
 - Fix two kprobe reenter bugs revealed by a recently added kprobe kunit
   test
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Merge tag 's390-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Heiko Carstens:

 - Add empty command line parameter handling stubs to kernel for all
   command line parameters which are handled in the decompressor. This
   avoids invalid "Unknown kernel command line parameters" messages from
   the kernel, and also avoids that these will be incorrectly passed to
   user space. This caused already confusion, therefore add the empty
   stubs

 - Add missing phys_to_virt() handling to machine check handler

 - Introduce and use a union to be used for zcrypt inline assemblies.
   This makes sure that only a register wide member of the union is
   passed as input and output parameter to inline assemblies, while
   usual C code uses other members of the union to access bit fields of
   it

 - Add and use a READ_ONCE_ALIGNED_128() macro, which can be used to
   atomically read a 128-bit value from memory. This replaces the
   (mis-)use of the 128-bit cmpxchg operation to do the same in cpum_sf
   code. Currently gcc does not generate the used lpq instruction if
   __READ_ONCE() is used for aligned 128-bit accesses, therefore use
   this s390 specific helper

 - Simplify machine check handler code if a task needs to be killed
   because of e.g. register corruption due to a machine malfunction

 - Perform CPU reset to clear pending interrupts and TLB entries on an
   already stopped target CPU before delegating work to it

 - Generate arch/s390/boot/vmlinux.map link map for the decompressor,
   when CONFIG_VMLINUX_MAP is enabled for debugging purposes

 - Fix segment type handling for dcssblk devices. It incorrectly always
   returned type "READ/WRITE" even for read-only segements, which can
   result in a kernel panic if somebody tries to write to a read-only
   device

 - Sort config S390 select list again

 - Fix two kprobe reenter bugs revealed by a recently added kprobe kunit
   test

* tag 's390-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/kprobes: fix current_kprobe never cleared after kprobes reenter
  s390/kprobes: fix irq mask clobbering on kprobe reenter from post_handler
  s390/Kconfig: sort config S390 select list again
  s390/extmem: return correct segment type in __segment_load()
  s390/decompressor: add link map saving
  s390/smp: perform cpu reset before delegating work to target cpu
  s390/mcck: cleanup user process termination path
  s390/cpum_sf: use READ_ONCE_ALIGNED_128() instead of 128-bit cmpxchg
  s390/rwonce: add READ_ONCE_ALIGNED_128() macro
  s390/ap,zcrypt,vfio: introduce and use ap_queue_status_reg union
  s390/nmi: fix virtual-physical address confusion
  s390/setup: do not complain about parameters handled in decompressor
This commit is contained in:
Linus Torvalds 2023-03-03 09:38:01 -08:00
commit 0bdf4a8bf0
14 changed files with 131 additions and 102 deletions

View File

@ -125,8 +125,8 @@ config S390
select ARCH_WANTS_DYNAMIC_TASK_STRUCT
select ARCH_WANTS_NO_INSTR
select ARCH_WANT_DEFAULT_BPF_JIT
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
select ARCH_WANT_IPC_PARSE_VERSION
select BUILDTIME_TABLE_SORT
select CLONE_BACKWARDS2
select DMA_OPS if PCI
@ -187,7 +187,6 @@ config S390
select HAVE_KPROBES
select HAVE_KPROBES_ON_FTRACE
select HAVE_KRETPROBES
select HAVE_RETHOOK
select HAVE_KVM
select HAVE_LIVEPATCH
select HAVE_MEMBLOCK_PHYS_MAP
@ -200,6 +199,7 @@ config S390
select HAVE_PERF_USER_STACK_DUMP
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RELIABLE_STACKTRACE
select HAVE_RETHOOK
select HAVE_RSEQ
select HAVE_SAMPLE_FTRACE_DIRECT
select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
@ -210,9 +210,9 @@ config S390
select HAVE_VIRT_CPU_ACCOUNTING_IDLE
select IOMMU_HELPER if PCI
select IOMMU_SUPPORT if PCI
select MMU_GATHER_MERGE_VMAS
select MMU_GATHER_NO_GATHER
select MMU_GATHER_RCU_TABLE_FREE
select MMU_GATHER_MERGE_VMAS
select MODULES_USE_ELF_RELA
select NEED_DMA_MAP_STATE if PCI
select NEED_PER_CPU_EMBED_FIRST_CHUNK

View File

@ -52,6 +52,8 @@ targets += vmlinux.bin.zst info.bin syms.bin vmlinux.syms $(obj-all)
OBJECTS := $(addprefix $(obj)/,$(obj-y))
OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
clean-files += vmlinux.map
quiet_cmd_section_cmp = SECTCMP $*
define cmd_section_cmp
s1=`$(OBJDUMP) -t -j "$*" "$<" | sort | \
@ -71,7 +73,7 @@ $(obj)/bzImage: $(obj)/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.b
$(obj)/section_cmp%: vmlinux $(obj)/vmlinux FORCE
$(call if_changed,section_cmp)
LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup --build-id=sha1 -T
LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup $(if $(CONFIG_VMLINUX_MAP),-Map=$(obj)/vmlinux.map) --build-id=sha1 -T
$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS_ALL) FORCE
$(call if_changed,ld)

View File

@ -49,6 +49,19 @@ struct ap_queue_status {
unsigned int _pad2 : 16;
};
/*
* AP queue status reg union to access the reg1
* register with the lower 32 bits comprising the
* ap queue status.
*/
union ap_queue_status_reg {
unsigned long value;
struct {
u32 _pad;
struct ap_queue_status status;
};
};
/**
* ap_intructions_available() - Test if AP instructions are available.
*
@ -82,7 +95,7 @@ static inline bool ap_instructions_available(void)
*/
static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)
{
struct ap_queue_status reg1;
union ap_queue_status_reg reg1;
unsigned long reg2;
asm volatile(
@ -91,12 +104,12 @@ static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)
" .insn rre,0xb2af0000,0,0\n" /* PQAP(TAPQ) */
" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
" lgr %[reg2],2\n" /* gr2 into reg2 */
: [reg1] "=&d" (reg1), [reg2] "=&d" (reg2)
: [reg1] "=&d" (reg1.value), [reg2] "=&d" (reg2)
: [qid] "d" (qid)
: "cc", "0", "1", "2");
if (info)
*info = reg2;
return reg1;
return reg1.status;
}
/**
@ -125,16 +138,16 @@ static inline struct ap_queue_status ap_test_queue(ap_qid_t qid,
static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
{
unsigned long reg0 = qid | (1UL << 24); /* fc 1UL is RAPQ */
struct ap_queue_status reg1;
union ap_queue_status_reg reg1;
asm volatile(
" lgr 0,%[reg0]\n" /* qid arg into gr0 */
" .insn rre,0xb2af0000,0,0\n" /* PQAP(RAPQ) */
" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
: [reg1] "=&d" (reg1)
: [reg1] "=&d" (reg1.value)
: [reg0] "d" (reg0)
: "cc", "0", "1");
return reg1;
return reg1.status;
}
/**
@ -146,16 +159,16 @@ static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
static inline struct ap_queue_status ap_zapq(ap_qid_t qid)
{
unsigned long reg0 = qid | (2UL << 24); /* fc 2UL is ZAPQ */
struct ap_queue_status reg1;
union ap_queue_status_reg reg1;
asm volatile(
" lgr 0,%[reg0]\n" /* qid arg into gr0 */
" .insn rre,0xb2af0000,0,0\n" /* PQAP(ZAPQ) */
" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
: [reg1] "=&d" (reg1)
: [reg1] "=&d" (reg1.value)
: [reg0] "d" (reg0)
: "cc", "0", "1");
return reg1;
return reg1.status;
}
/**
@ -209,18 +222,21 @@ static inline int ap_qci(struct ap_config_info *config)
* parameter to the PQAP(AQIC) instruction. For details please
* see the AR documentation.
*/
struct ap_qirq_ctrl {
unsigned int _res1 : 8;
unsigned int zone : 8; /* zone info */
unsigned int ir : 1; /* ir flag: enable (1) or disable (0) irq */
unsigned int _res2 : 4;
unsigned int gisc : 3; /* guest isc field */
unsigned int _res3 : 6;
unsigned int gf : 2; /* gisa format */
unsigned int _res4 : 1;
unsigned int gisa : 27; /* gisa origin */
unsigned int _res5 : 1;
unsigned int isc : 3; /* irq sub class */
union ap_qirq_ctrl {
unsigned long value;
struct {
unsigned int : 8;
unsigned int zone : 8; /* zone info */
unsigned int ir : 1; /* ir flag: enable (1) or disable (0) irq */
unsigned int : 4;
unsigned int gisc : 3; /* guest isc field */
unsigned int : 6;
unsigned int gf : 2; /* gisa format */
unsigned int : 1;
unsigned int gisa : 27; /* gisa origin */
unsigned int : 1;
unsigned int isc : 3; /* irq sub class */
};
};
/**
@ -232,21 +248,14 @@ struct ap_qirq_ctrl {
* Returns AP queue status.
*/
static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
struct ap_qirq_ctrl qirqctrl,
union ap_qirq_ctrl qirqctrl,
phys_addr_t pa_ind)
{
unsigned long reg0 = qid | (3UL << 24); /* fc 3UL is AQIC */
union {
unsigned long value;
struct ap_qirq_ctrl qirqctrl;
struct {
u32 _pad;
struct ap_queue_status status;
};
} reg1;
union ap_queue_status_reg reg1;
unsigned long reg2 = pa_ind;
reg1.qirqctrl = qirqctrl;
reg1.value = qirqctrl.value;
asm volatile(
" lgr 0,%[reg0]\n" /* qid param into gr0 */
@ -254,7 +263,7 @@ static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
" lgr 2,%[reg2]\n" /* ni addr into gr2 */
" .insn rre,0xb2af0000,0,0\n" /* PQAP(AQIC) */
" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
: [reg1] "+&d" (reg1)
: [reg1] "+&d" (reg1.value)
: [reg0] "d" (reg0), [reg2] "d" (reg2)
: "cc", "memory", "0", "1", "2");
@ -291,13 +300,7 @@ static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
union ap_qact_ap_info *apinfo)
{
unsigned long reg0 = qid | (5UL << 24) | ((ifbit & 0x01) << 22);
union {
unsigned long value;
struct {
u32 _pad;
struct ap_queue_status status;
};
} reg1;
union ap_queue_status_reg reg1;
unsigned long reg2;
reg1.value = apinfo->val;
@ -308,7 +311,7 @@ static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
" .insn rre,0xb2af0000,0,0\n" /* PQAP(QACT) */
" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
" lgr %[reg2],2\n" /* qact out info into reg2 */
: [reg1] "+&d" (reg1), [reg2] "=&d" (reg2)
: [reg1] "+&d" (reg1.value), [reg2] "=&d" (reg2)
: [reg0] "d" (reg0)
: "cc", "0", "1", "2");
apinfo->val = reg2;
@ -333,7 +336,7 @@ static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
{
unsigned long reg0 = qid | 0x40000000UL; /* 0x4... is last msg part */
union register_pair nqap_r1, nqap_r2;
struct ap_queue_status reg1;
union ap_queue_status_reg reg1;
nqap_r1.even = (unsigned int)(psmid >> 32);
nqap_r1.odd = psmid & 0xffffffff;
@ -345,11 +348,11 @@ static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
"0: .insn rre,0xb2ad0000,%[nqap_r1],%[nqap_r2]\n"
" brc 2,0b\n" /* handle partial completion */
" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
: [reg0] "+&d" (reg0), [reg1] "=&d" (reg1),
: [reg0] "+&d" (reg0), [reg1] "=&d" (reg1.value),
[nqap_r2] "+&d" (nqap_r2.pair)
: [nqap_r1] "d" (nqap_r1.pair)
: "cc", "memory", "0", "1");
return reg1;
return reg1.status;
}
/**
@ -389,7 +392,7 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
unsigned long *resgr0)
{
unsigned long reg0 = resgr0 && *resgr0 ? *resgr0 : qid | 0x80000000UL;
struct ap_queue_status reg1;
union ap_queue_status_reg reg1;
unsigned long reg2;
union register_pair rp1, rp2;
@ -408,8 +411,9 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
"2: lgr %[reg0],0\n" /* gr0 (qid + info) into reg0 */
" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
" lgr %[reg2],2\n" /* gr2 (res length) into reg2 */
: [reg0] "+&d" (reg0), [reg1] "=&d" (reg1), [reg2] "=&d" (reg2),
[rp1] "+&d" (rp1.pair), [rp2] "+&d" (rp2.pair)
: [reg0] "+&d" (reg0), [reg1] "=&d" (reg1.value),
[reg2] "=&d" (reg2), [rp1] "+&d" (rp1.pair),
[rp2] "+&d" (rp2.pair)
:
: "cc", "memory", "0", "1", "2");
@ -421,7 +425,7 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
* Signal the caller that this dqap is only partially received
* with a special status response code 0xFF and *resgr0 updated
*/
reg1.response_code = 0xFF;
reg1.status.response_code = 0xFF;
if (resgr0)
*resgr0 = reg0;
} else {
@ -430,7 +434,7 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
*resgr0 = 0;
}
return reg1;
return reg1.status;
}
/*

View File

@ -101,9 +101,8 @@ void nmi_alloc_mcesa_early(u64 *mcesad);
int nmi_alloc_mcesa(u64 *mcesad);
void nmi_free_mcesa(u64 *mcesad);
void s390_handle_mcck(struct pt_regs *regs);
void __s390_handle_mcck(void);
int s390_do_machine_check(struct pt_regs *regs);
void s390_handle_mcck(void);
void s390_do_machine_check(struct pt_regs *regs);
#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_NMI_H */

View File

@ -0,0 +1,31 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_S390_RWONCE_H
#define __ASM_S390_RWONCE_H
#include <linux/compiler_types.h>
/*
* Use READ_ONCE_ALIGNED_128() for 128-bit block concurrent (atomic) read
* accesses. Note that x must be 128-bit aligned, otherwise a specification
* exception is generated.
*/
#define READ_ONCE_ALIGNED_128(x) \
({ \
union { \
typeof(x) __x; \
__uint128_t val; \
} __u; \
\
BUILD_BUG_ON(sizeof(x) != 16); \
asm volatile( \
" lpq %[val],%[_x]\n" \
: [val] "=d" (__u.val) \
: [_x] "QS" (x) \
: "memory"); \
__u.__x; \
})
#include <asm-generic/rwonce.h>
#endif /* __ASM_S390_RWONCE_H */

View File

@ -36,6 +36,23 @@
int __bootdata(is_full_image);
#define decompressor_handled_param(param) \
static int __init ignore_decompressor_param_##param(char *s) \
{ \
return 0; \
} \
early_param(#param, ignore_decompressor_param_##param)
decompressor_handled_param(mem);
decompressor_handled_param(vmalloc);
decompressor_handled_param(dfltcc);
decompressor_handled_param(noexec);
decompressor_handled_param(facilities);
decompressor_handled_param(nokaslr);
#if IS_ENABLED(CONFIG_KVM)
decompressor_handled_param(prot_virt);
#endif
static void __init reset_tod_clock(void)
{
union tod_clock clk;

View File

@ -562,16 +562,6 @@ ENTRY(mcck_int_handler)
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
lgr %r2,%r11 # pass pointer to pt_regs
brasl %r14,s390_do_machine_check
cghi %r2,0
je .Lmcck_return
lg %r1,__LC_KERNEL_STACK # switch to kernel stack
mvc STACK_FRAME_OVERHEAD(__PT_SIZE,%r1),0(%r11)
xc __SF_BACKCHAIN(8,%r1),__SF_BACKCHAIN(%r1)
la %r11,STACK_FRAME_OVERHEAD(%r1)
lgr %r2,%r11
lgr %r15,%r1
brasl %r14,s390_handle_mcck
.Lmcck_return:
lctlg %c1,%c1,__PT_CR1(%r11)
lmg %r0,%r10,__PT_R0(%r11)
mvc __LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW

View File

@ -278,6 +278,7 @@ static void pop_kprobe(struct kprobe_ctlblk *kcb)
{
__this_cpu_write(current_kprobe, kcb->prev_kprobe.kp);
kcb->kprobe_status = kcb->prev_kprobe.status;
kcb->prev_kprobe.kp = NULL;
}
NOKPROBE_SYMBOL(pop_kprobe);
@ -402,12 +403,11 @@ static int post_kprobe_handler(struct pt_regs *regs)
if (!p)
return 0;
resume_execution(p, regs);
if (kcb->kprobe_status != KPROBE_REENTER && p->post_handler) {
kcb->kprobe_status = KPROBE_HIT_SSDONE;
p->post_handler(p, regs, 0);
}
resume_execution(p, regs);
pop_kprobe(kcb);
preempt_enable_no_resched();

View File

@ -156,7 +156,7 @@ NOKPROBE_SYMBOL(s390_handle_damage);
* Main machine check handler function. Will be called with interrupts disabled
* and machine checks enabled.
*/
void __s390_handle_mcck(void)
void s390_handle_mcck(void)
{
struct mcck_struct mcck;
@ -192,23 +192,16 @@ void __s390_handle_mcck(void)
if (mcck.stp_queue)
stp_queue_work();
if (mcck.kill_task) {
local_irq_enable();
printk(KERN_EMERG "mcck: Terminating task because of machine "
"malfunction (code 0x%016lx).\n", mcck.mcck_code);
printk(KERN_EMERG "mcck: task: %s, pid: %d.\n",
current->comm, current->pid);
make_task_dead(SIGSEGV);
if (is_global_init(current))
panic("mcck: Attempting to kill init!\n");
do_send_sig_info(SIGKILL, SEND_SIG_PRIV, current, PIDTYPE_PID);
}
}
void noinstr s390_handle_mcck(struct pt_regs *regs)
{
trace_hardirqs_off();
pai_kernel_enter(regs);
__s390_handle_mcck();
pai_kernel_exit(regs);
trace_hardirqs_on();
}
/*
* returns 0 if register contents could be validated
* returns 1 otherwise
@ -346,8 +339,7 @@ static void notrace s390_backup_mcck_info(struct pt_regs *regs)
struct sie_page *sie_page;
/* r14 contains the sie block, which was set in sie64a */
struct kvm_s390_sie_block *sie_block =
(struct kvm_s390_sie_block *) regs->gprs[14];
struct kvm_s390_sie_block *sie_block = phys_to_virt(regs->gprs[14]);
if (sie_block == NULL)
/* Something's seriously wrong, stop system. */
@ -374,7 +366,7 @@ NOKPROBE_SYMBOL(s390_backup_mcck_info);
/*
* machine check handler.
*/
int notrace s390_do_machine_check(struct pt_regs *regs)
void notrace s390_do_machine_check(struct pt_regs *regs)
{
static int ipd_count;
static DEFINE_SPINLOCK(ipd_lock);
@ -504,16 +496,10 @@ int notrace s390_do_machine_check(struct pt_regs *regs)
}
clear_cpu_flag(CIF_MCCK_GUEST);
if (user_mode(regs) && mcck_pending) {
irqentry_nmi_exit(regs, irq_state);
return 1;
}
if (mcck_pending)
schedule_mcck_handler();
irqentry_nmi_exit(regs, irq_state);
return 0;
}
NOKPROBE_SYMBOL(s390_do_machine_check);

View File

@ -1355,8 +1355,7 @@ static void hw_perf_event_update(struct perf_event *event, int flush_all)
num_sdb++;
/* Reset trailer (using compare-double-and-swap) */
/* READ_ONCE() 16 byte header */
prev.val = __cdsg(&te->header.val, 0, 0);
prev.val = READ_ONCE_ALIGNED_128(te->header.val);
do {
old.val = prev.val;
new.val = prev.val;
@ -1558,8 +1557,7 @@ static bool aux_set_alert(struct aux_buffer *aux, unsigned long alert_index,
struct hws_trailer_entry *te;
te = aux_sdb_trailer(aux, alert_index);
/* READ_ONCE() 16 byte header */
prev.val = __cdsg(&te->header.val, 0, 0);
prev.val = READ_ONCE_ALIGNED_128(te->header.val);
do {
old.val = prev.val;
new.val = prev.val;
@ -1637,8 +1635,7 @@ static bool aux_reset_buffer(struct aux_buffer *aux, unsigned long range,
idx_old = idx = aux->empty_mark + 1;
for (i = 0; i < range_scan; i++, idx++) {
te = aux_sdb_trailer(aux, idx);
/* READ_ONCE() 16 byte header */
prev.val = __cdsg(&te->header.val, 0, 0);
prev.val = READ_ONCE_ALIGNED_128(te->header.val);
do {
old.val = prev.val;
new.val = prev.val;

View File

@ -333,6 +333,7 @@ static void pcpu_delegate(struct pcpu *pcpu,
}
/* Stop target cpu (if func returns this stops the current cpu). */
pcpu_sigp_retry(pcpu, SIGP_STOP, 0);
pcpu_sigp_retry(pcpu, SIGP_CPU_RESET, 0);
/* Restart func on the target cpu and stop the current cpu. */
if (lc) {
lc->restart_stack = stack;
@ -522,7 +523,7 @@ static void smp_handle_ext_call(void)
if (test_bit(ec_call_function_single, &bits))
generic_smp_call_function_single_interrupt();
if (test_bit(ec_mcck_pending, &bits))
__s390_handle_mcck();
s390_handle_mcck();
if (test_bit(ec_irq_work, &bits))
irq_work_run();
}

View File

@ -289,15 +289,17 @@ segment_overlaps_others (struct dcss_segment *seg)
/*
* real segment loading function, called from segment_load
* Must return either an error code < 0, or the segment type code >= 0
*/
static int
__segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long *end)
{
unsigned long start_addr, end_addr, dummy;
struct dcss_segment *seg;
int rc, diag_cc;
int rc, diag_cc, segtype;
start_addr = end_addr = 0;
segtype = -1;
seg = kmalloc(sizeof(*seg), GFP_KERNEL | GFP_DMA);
if (seg == NULL) {
rc = -ENOMEM;
@ -326,9 +328,9 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
seg->res_name[8] = '\0';
strlcat(seg->res_name, " (DCSS)", sizeof(seg->res_name));
seg->res->name = seg->res_name;
rc = seg->vm_segtype;
if (rc == SEG_TYPE_SC ||
((rc == SEG_TYPE_SR || rc == SEG_TYPE_ER) && !do_nonshared))
segtype = seg->vm_segtype;
if (segtype == SEG_TYPE_SC ||
((segtype == SEG_TYPE_SR || segtype == SEG_TYPE_ER) && !do_nonshared))
seg->res->flags |= IORESOURCE_READONLY;
/* Check for overlapping resources before adding the mapping. */
@ -386,7 +388,7 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
out_free:
kfree(seg);
out:
return rc;
return rc < 0 ? rc : segtype;
}
/*

View File

@ -29,8 +29,8 @@ static void __ap_flush_queue(struct ap_queue *aq);
*/
static int ap_queue_enable_irq(struct ap_queue *aq, void *ind)
{
union ap_qirq_ctrl qirqctrl = { .value = 0 };
struct ap_queue_status status;
struct ap_qirq_ctrl qirqctrl = { 0 };
qirqctrl.ir = 1;
qirqctrl.isc = AP_ISC;

View File

@ -301,7 +301,7 @@ static void vfio_ap_free_aqic_resources(struct vfio_ap_queue *q)
*/
static struct ap_queue_status vfio_ap_irq_disable(struct vfio_ap_queue *q)
{
struct ap_qirq_ctrl aqic_gisa = {};
union ap_qirq_ctrl aqic_gisa = { .value = 0 };
struct ap_queue_status status;
int retries = 5;
@ -384,7 +384,7 @@ static struct ap_queue_status vfio_ap_irq_enable(struct vfio_ap_queue *q,
int isc,
struct kvm_vcpu *vcpu)
{
struct ap_qirq_ctrl aqic_gisa = {};
union ap_qirq_ctrl aqic_gisa = { .value = 0 };
struct ap_queue_status status = {};
struct kvm_s390_gisa *gisa;
struct page *h_page;