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authorLinus Torvalds <torvalds@linux-foundation.org>2024-01-11 05:18:20 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2024-01-11 05:18:20 +0300
commitde927f6c0b07d9e698416c5b287c521b07694cac (patch)
treea80a3c16b3a6d19a5421ee66174e4e0af3d993a7 /arch
parentc29901006179c4c87f9335771e50814ec5707239 (diff)
parentb2b97a62f055dd638f7f02087331a8380d8f139a (diff)
downloadlinux-de927f6c0b07d9e698416c5b287c521b07694cac.tar.xz
Merge tag 's390-6.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Alexander Gordeev: - Add machine variable capacity information to /proc/sysinfo. - Limit the waste of page tables and always align vmalloc area size and base address on segment boundary. - Fix a memory leak when an attempt to register interruption sub class (ISC) for the adjunct-processor (AP) guest failed. - Reset response code AP_RESPONSE_INVALID_GISA to understandable by guest AP_RESPONSE_INVALID_ADDRESS in response to a failed interruption sub class (ISC) registration attempt. - Improve reaction to adjunct-processor (AP) AP_RESPONSE_OTHERWISE_CHANGED response code when enabling interrupts on behalf of a guest. - Fix incorrect sysfs 'status' attribute of adjunct-processor (AP) queue device bound to the vfio_ap device driver when the mediated device is attached to a guest, but the queue device is not passed through. - Rework struct ap_card to hold the whole adjunct-processor (AP) card hardware information. As result, all the ugly bit checks are replaced by simple evaluations of the required bit fields. - Improve handling of some weird scenarios between service element (SE) host and SE guest with adjunct-processor (AP) pass-through support. - Change local_ctl_set_bit() and local_ctl_clear_bit() so they return the previous value of the to be changed control register. This is useful if a bit is only changed temporarily and the previous content needs to be restored. - The kernel starts with machine checks disabled and is expected to enable it once trap_init() is called. However the implementation allows machine checks early. Consistently enable it in trap_init() only. - local_mcck_disable() and local_mcck_enable() assume that machine checks are always enabled. Instead implement and use local_mcck_save() and local_mcck_restore() to disable machine checks and restore the previous state. - Modification of floating point control (FPC) register of a traced process using ptrace interface may lead to corruption of the FPC register of the tracing process. Fix this. - kvm_arch_vcpu_ioctl_set_fpu() allows to set the floating point control (FPC) register in vCPU, but may lead to corruption of the FPC register of the host process. Fix this. - Use READ_ONCE() to read a vCPU floating point register value from the memory mapped area. This avoids that, depending on code generation, a different value is tested for validity than the one that is used. - Get rid of test_fp_ctl(), since it is quite subtle to use it correctly. Instead copy a new floating point control register value into its save area and test the validity of the new value when loading it. - Remove superfluous save_fpu_regs() call. - Remove s390 support for ARCH_WANTS_DYNAMIC_TASK_STRUCT. All machines provide the vector facility since many years and the need to make the task structure size dependent on the vector facility does not exist. - Remove the "novx" kernel command line option, as the vector code runs without any problems since many years. - Add the vector facility to the z13 architecture level set (ALS). All hypervisors support the vector facility since many years. This allows compile time optimizations of the kernel. - Get rid of MACHINE_HAS_VX and replace it with cpu_has_vx(). As result, the compiled code will have less runtime checks and less code. - Convert pgste_get_lock() and pgste_set_unlock() ASM inlines to C. - Convert the struct subchannel spinlock from pointer to member. * tag 's390-6.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (24 commits) Revert "s390: update defconfigs" s390/cio: make sch->lock spinlock pointer a member s390: update defconfigs s390/mm: convert pgste locking functions to C s390/fpu: get rid of MACHINE_HAS_VX s390/als: add vector facility to z13 architecture level set s390/fpu: remove "novx" option s390/fpu: remove ARCH_WANTS_DYNAMIC_TASK_STRUCT support KVM: s390: remove superfluous save_fpu_regs() call s390/fpu: get rid of test_fp_ctl() KVM: s390: use READ_ONCE() to read fpc register value KVM: s390: fix setting of fpc register s390/ptrace: handle setting of fpc register correctly s390/nmi: implement and use local_mcck_save() / local_mcck_restore() s390/nmi: consistently enable machine checks in trap_init() s390/ctlreg: return old register contents when changing bits s390/ap: handle outband SE bind state change s390/ap: store TAPQ hwinfo in struct ap_card s390/vfio-ap: fix sysfs status attribute for AP queue devices s390/vfio-ap: improve reaction to response code 07 from PQAP(AQIC) command ...
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/Kconfig1
-rw-r--r--arch/s390/boot/ipl_parm.c2
-rw-r--r--arch/s390/boot/startup.c3
-rw-r--r--arch/s390/crypto/chacha-glue.c2
-rw-r--r--arch/s390/include/asm/ap.h21
-rw-r--r--arch/s390/include/asm/ctlreg.h24
-rw-r--r--arch/s390/include/asm/fpu/api.h35
-rw-r--r--arch/s390/include/asm/fpu/internal.h10
-rw-r--r--arch/s390/include/asm/processor.h34
-rw-r--r--arch/s390/include/asm/setup.h2
-rw-r--r--arch/s390/include/asm/sysinfo.h4
-rw-r--r--arch/s390/kernel/compat_signal.c16
-rw-r--r--arch/s390/kernel/crash_dump.c5
-rw-r--r--arch/s390/kernel/early.c12
-rw-r--r--arch/s390/kernel/fpu.c12
-rw-r--r--arch/s390/kernel/machine_kexec.c2
-rw-r--r--arch/s390/kernel/nmi.c10
-rw-r--r--arch/s390/kernel/perf_regs.c6
-rw-r--r--arch/s390/kernel/process.c2
-rw-r--r--arch/s390/kernel/processor.c7
-rw-r--r--arch/s390/kernel/ptrace.c28
-rw-r--r--arch/s390/kernel/setup.c25
-rw-r--r--arch/s390/kernel/signal.c12
-rw-r--r--arch/s390/kernel/smp.c6
-rw-r--r--arch/s390/kernel/sysinfo.c10
-rw-r--r--arch/s390/kernel/traps.c13
-rw-r--r--arch/s390/kernel/vmlinux.lds.S1
-rw-r--r--arch/s390/kvm/interrupt.c2
-rw-r--r--arch/s390/kvm/kvm-s390.c26
-rw-r--r--arch/s390/lib/test_unwind.c6
-rw-r--r--arch/s390/mm/pgtable.c29
-rw-r--r--arch/s390/tools/gen_facilities.c1
32 files changed, 190 insertions, 179 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 959adae10f80..8f39f0424796 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -123,7 +123,6 @@ config S390
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF
select ARCH_USE_SYM_ANNOTATIONS
- select ARCH_WANTS_DYNAMIC_TASK_STRUCT
select ARCH_WANTS_NO_INSTR
select ARCH_WANT_DEFAULT_BPF_JIT
select ARCH_WANT_IPC_PARSE_VERSION
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c
index 2ab4872fbee1..b24de9aabf7d 100644
--- a/arch/s390/boot/ipl_parm.c
+++ b/arch/s390/boot/ipl_parm.c
@@ -274,7 +274,7 @@ void parse_boot_command_line(void)
memory_limit = round_down(memparse(val, NULL), PAGE_SIZE);
if (!strcmp(param, "vmalloc") && val) {
- vmalloc_size = round_up(memparse(val, NULL), PAGE_SIZE);
+ vmalloc_size = round_up(memparse(val, NULL), _SEGMENT_SIZE);
vmalloc_size_set = 1;
}
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c
index 8104e0e3d188..9cc76e631759 100644
--- a/arch/s390/boot/startup.c
+++ b/arch/s390/boot/startup.c
@@ -255,7 +255,8 @@ static unsigned long setup_kernel_memory_layout(void)
VMALLOC_END = MODULES_VADDR;
/* allow vmalloc area to occupy up to about 1/2 of the rest virtual space left */
- vmalloc_size = min(vmalloc_size, round_down(VMALLOC_END / 2, _REGION3_SIZE));
+ vsize = round_down(VMALLOC_END / 2, _SEGMENT_SIZE);
+ vmalloc_size = min(vmalloc_size, vsize);
VMALLOC_START = VMALLOC_END - vmalloc_size;
/* split remaining virtual space between 1:1 mapping & vmemmap array */
diff --git a/arch/s390/crypto/chacha-glue.c b/arch/s390/crypto/chacha-glue.c
index 5fae187f947a..ed9959e6f714 100644
--- a/arch/s390/crypto/chacha-glue.c
+++ b/arch/s390/crypto/chacha-glue.c
@@ -82,7 +82,7 @@ void chacha_crypt_arch(u32 *state, u8 *dst, const u8 *src,
* it cannot handle a block of data or less, but otherwise
* it can handle data of arbitrary size
*/
- if (bytes <= CHACHA_BLOCK_SIZE || nrounds != 20 || !MACHINE_HAS_VX)
+ if (bytes <= CHACHA_BLOCK_SIZE || nrounds != 20 || !cpu_has_vx())
chacha_crypt_generic(state, dst, src, bytes, nrounds);
else
chacha20_crypt_s390(state, dst, src, bytes,
diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
index 40c2b82f083a..43ac4a64f49b 100644
--- a/arch/s390/include/asm/ap.h
+++ b/arch/s390/include/asm/ap.h
@@ -88,7 +88,7 @@ static inline bool ap_instructions_available(void)
}
/* TAPQ register GR2 response struct */
-struct ap_tapq_gr2 {
+struct ap_tapq_hwinfo {
union {
unsigned long value;
struct {
@@ -96,11 +96,13 @@ struct ap_tapq_gr2 {
unsigned int apinfo : 32; /* ap type, ... */
};
struct {
- unsigned int s : 1; /* APSC */
- unsigned int m : 1; /* AP4KM */
- unsigned int c : 1; /* AP4KC */
- unsigned int mode : 3;
- unsigned int n : 1; /* APXA */
+ unsigned int apsc : 1; /* APSC */
+ unsigned int mex4k : 1; /* AP4KM */
+ unsigned int crt4k : 1; /* AP4KC */
+ unsigned int cca : 1; /* D */
+ unsigned int accel : 1; /* A */
+ unsigned int ep11 : 1; /* X */
+ unsigned int apxa : 1; /* APXA */
unsigned int : 1;
unsigned int class : 8;
unsigned int bs : 2; /* SE bind/assoc */
@@ -126,11 +128,12 @@ struct ap_tapq_gr2 {
/**
* ap_tapq(): Test adjunct processor queue.
* @qid: The AP queue number
- * @info: Pointer to queue descriptor
+ * @info: Pointer to tapq hwinfo struct
*
* Returns AP queue status structure.
*/
-static inline struct ap_queue_status ap_tapq(ap_qid_t qid, struct ap_tapq_gr2 *info)
+static inline struct ap_queue_status ap_tapq(ap_qid_t qid,
+ struct ap_tapq_hwinfo *info)
{
union ap_queue_status_reg reg1;
unsigned long reg2;
@@ -158,7 +161,7 @@ static inline struct ap_queue_status ap_tapq(ap_qid_t qid, struct ap_tapq_gr2 *i
* Returns AP queue status structure.
*/
static inline struct ap_queue_status ap_test_queue(ap_qid_t qid, int tbit,
- struct ap_tapq_gr2 *info)
+ struct ap_tapq_hwinfo *info)
{
if (tbit)
qid |= 1UL << 23; /* set T bit*/
diff --git a/arch/s390/include/asm/ctlreg.h b/arch/s390/include/asm/ctlreg.h
index 6d4b85f2b541..72a9556d04f3 100644
--- a/arch/s390/include/asm/ctlreg.h
+++ b/arch/s390/include/asm/ctlreg.h
@@ -141,22 +141,26 @@ static __always_inline void local_ctl_store(unsigned int cr, struct ctlreg *reg)
: [cr] "i" (cr));
}
-static __always_inline void local_ctl_set_bit(unsigned int cr, unsigned int bit)
+static __always_inline struct ctlreg local_ctl_set_bit(unsigned int cr, unsigned int bit)
{
- struct ctlreg reg;
+ struct ctlreg new, old;
- local_ctl_store(cr, &reg);
- reg.val |= 1UL << bit;
- local_ctl_load(cr, &reg);
+ local_ctl_store(cr, &old);
+ new = old;
+ new.val |= 1UL << bit;
+ local_ctl_load(cr, &new);
+ return old;
}
-static __always_inline void local_ctl_clear_bit(unsigned int cr, unsigned int bit)
+static __always_inline struct ctlreg local_ctl_clear_bit(unsigned int cr, unsigned int bit)
{
- struct ctlreg reg;
+ struct ctlreg new, old;
- local_ctl_store(cr, &reg);
- reg.val &= ~(1UL << bit);
- local_ctl_load(cr, &reg);
+ local_ctl_store(cr, &old);
+ new = old;
+ new.val &= ~(1UL << bit);
+ local_ctl_load(cr, &new);
+ return old;
}
struct lowcore;
diff --git a/arch/s390/include/asm/fpu/api.h b/arch/s390/include/asm/fpu/api.h
index 9acf48e53a87..d6ca8bc6ca68 100644
--- a/arch/s390/include/asm/fpu/api.h
+++ b/arch/s390/include/asm/fpu/api.h
@@ -46,26 +46,33 @@
#include <linux/preempt.h>
#include <asm/asm-extable.h>
+#include <asm/fpu/internal.h>
void save_fpu_regs(void);
void load_fpu_regs(void);
void __load_fpu_regs(void);
-static inline int test_fp_ctl(u32 fpc)
+/**
+ * sfpc_safe - Set floating point control register safely.
+ * @fpc: new value for floating point control register
+ *
+ * Set floating point control register. This may lead to an exception,
+ * since a saved value may have been modified by user space (ptrace,
+ * signal return, kvm registers) to an invalid value. In such a case
+ * set the floating point control register to zero.
+ */
+static inline void sfpc_safe(u32 fpc)
{
- u32 orig_fpc;
- int rc;
-
- asm volatile(
- " efpc %1\n"
- " sfpc %2\n"
- "0: sfpc %1\n"
- " la %0,0\n"
- "1:\n"
- EX_TABLE(0b,1b)
- : "=d" (rc), "=&d" (orig_fpc)
- : "d" (fpc), "0" (-EINVAL));
- return rc;
+ asm volatile("\n"
+ "0: sfpc %[fpc]\n"
+ "1: nopr %%r7\n"
+ ".pushsection .fixup, \"ax\"\n"
+ "2: lghi %[fpc],0\n"
+ " jg 0b\n"
+ ".popsection\n"
+ EX_TABLE(1b, 2b)
+ : [fpc] "+d" (fpc)
+ : : "memory");
}
#define KERNEL_FPC 1
diff --git a/arch/s390/include/asm/fpu/internal.h b/arch/s390/include/asm/fpu/internal.h
index 8634581b9011..d511c4cf5afb 100644
--- a/arch/s390/include/asm/fpu/internal.h
+++ b/arch/s390/include/asm/fpu/internal.h
@@ -10,8 +10,14 @@
#define _ASM_S390_FPU_INTERNAL_H
#include <linux/string.h>
+#include <asm/facility.h>
#include <asm/fpu/types.h>
+static inline bool cpu_has_vx(void)
+{
+ return likely(test_facility(129));
+}
+
static inline void save_vx_regs(__vector128 *vxrs)
{
asm volatile(
@@ -41,7 +47,7 @@ static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
{
fpregs->pad = 0;
fpregs->fpc = fpu->fpc;
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs);
else
memcpy((freg_t *)&fpregs->fprs, fpu->fprs,
@@ -51,7 +57,7 @@ static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu)
{
fpu->fpc = fpregs->fpc;
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs);
else
memcpy(fpu->fprs, (freg_t *)&fpregs->fprs,
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index c15eadbb9983..c0b6e74d899a 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -184,11 +184,7 @@ struct thread_struct {
struct gs_cb *gs_cb; /* Current guarded storage cb */
struct gs_cb *gs_bc_cb; /* Broadcast guarded storage cb */
struct pgm_tdb trap_tdb; /* Transaction abort diagnose block */
- /*
- * Warning: 'fpu' is dynamically-sized. It *MUST* be at
- * the end.
- */
- struct fpu fpu; /* FP and VX register save area */
+ struct fpu fpu; /* FP and VX register save area */
};
/* Flag to disable transactions. */
@@ -331,14 +327,36 @@ static inline unsigned long __extract_psw(void)
return (((unsigned long) reg1) << 32) | ((unsigned long) reg2);
}
-static inline void local_mcck_enable(void)
+static inline unsigned long __local_mcck_save(void)
{
- __load_psw_mask(__extract_psw() | PSW_MASK_MCHECK);
+ unsigned long mask = __extract_psw();
+
+ __load_psw_mask(mask & ~PSW_MASK_MCHECK);
+ return mask & PSW_MASK_MCHECK;
+}
+
+#define local_mcck_save(mflags) \
+do { \
+ typecheck(unsigned long, mflags); \
+ mflags = __local_mcck_save(); \
+} while (0)
+
+static inline void local_mcck_restore(unsigned long mflags)
+{
+ unsigned long mask = __extract_psw();
+
+ mask &= ~PSW_MASK_MCHECK;
+ __load_psw_mask(mask | mflags);
}
static inline void local_mcck_disable(void)
{
- __load_psw_mask(__extract_psw() & ~PSW_MASK_MCHECK);
+ __local_mcck_save();
+}
+
+static inline void local_mcck_enable(void)
+{
+ __load_psw_mask(__extract_psw() | PSW_MASK_MCHECK);
}
/*
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index df316436d2e1..03bcaa8effb2 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -28,7 +28,6 @@
#define MACHINE_FLAG_TOPOLOGY BIT(10)
#define MACHINE_FLAG_TE BIT(11)
#define MACHINE_FLAG_TLB_LC BIT(12)
-#define MACHINE_FLAG_VX BIT(13)
#define MACHINE_FLAG_TLB_GUEST BIT(14)
#define MACHINE_FLAG_NX BIT(15)
#define MACHINE_FLAG_GS BIT(16)
@@ -90,7 +89,6 @@ extern unsigned long mio_wb_bit_mask;
#define MACHINE_HAS_TOPOLOGY (S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
#define MACHINE_HAS_TE (S390_lowcore.machine_flags & MACHINE_FLAG_TE)
#define MACHINE_HAS_TLB_LC (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
-#define MACHINE_HAS_VX (S390_lowcore.machine_flags & MACHINE_FLAG_VX)
#define MACHINE_HAS_TLB_GUEST (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_GUEST)
#define MACHINE_HAS_NX (S390_lowcore.machine_flags & MACHINE_FLAG_NX)
#define MACHINE_HAS_GS (S390_lowcore.machine_flags & MACHINE_FLAG_GS)
diff --git a/arch/s390/include/asm/sysinfo.h b/arch/s390/include/asm/sysinfo.h
index ab1c6316055c..edca5a751df4 100644
--- a/arch/s390/include/asm/sysinfo.h
+++ b/arch/s390/include/asm/sysinfo.h
@@ -40,6 +40,10 @@ struct sysinfo_1_1_1 {
unsigned int ncr;
unsigned int npr;
unsigned int ntr;
+ char reserved_3[4];
+ char model_var_cap[16];
+ unsigned int model_var_cap_rating;
+ unsigned int nvr;
};
struct sysinfo_1_2_1 {
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index cecedd01d4ec..f8fc6c25d051 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -29,6 +29,7 @@
#include <asm/lowcore.h>
#include <asm/switch_to.h>
#include <asm/vdso.h>
+#include <asm/fpu/api.h>
#include "compat_linux.h"
#include "compat_ptrace.h"
#include "entry.h"
@@ -98,10 +99,6 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
if (!is_ri_task(current) && (user_sregs.regs.psw.mask & PSW32_MASK_RI))
return -EINVAL;
- /* Test the floating-point-control word. */
- if (test_fp_ctl(user_sregs.fpregs.fpc))
- return -EINVAL;
-
/* Use regs->psw.mask instead of PSW_USER_BITS to preserve PER bit. */
regs->psw.mask = (regs->psw.mask & ~(PSW_MASK_USER | PSW_MASK_RI)) |
(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_USER) << 32 |
@@ -137,7 +134,7 @@ static int save_sigregs_ext32(struct pt_regs *regs,
return -EFAULT;
/* Save vector registers to signal stack */
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
for (i = 0; i < __NUM_VXRS_LOW; i++)
vxrs[i] = current->thread.fpu.vxrs[i].low;
if (__copy_to_user(&sregs_ext->vxrs_low, vxrs,
@@ -165,7 +162,7 @@ static int restore_sigregs_ext32(struct pt_regs *regs,
*(__u32 *)&regs->gprs[i] = gprs_high[i];
/* Restore vector registers from signal stack */
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
if (__copy_from_user(vxrs, &sregs_ext->vxrs_low,
sizeof(sregs_ext->vxrs_low)) ||
__copy_from_user(current->thread.fpu.vxrs + __NUM_VXRS_LOW,
@@ -265,7 +262,7 @@ static int setup_frame32(struct ksignal *ksig, sigset_t *set,
* the machine supports it
*/
frame_size = sizeof(*frame) - sizeof(frame->sregs_ext.__reserved);
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
frame_size -= sizeof(frame->sregs_ext.vxrs_low) +
sizeof(frame->sregs_ext.vxrs_high);
frame = get_sigframe(&ksig->ka, regs, frame_size);
@@ -348,11 +345,12 @@ static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set,
* the machine supports it
*/
uc_flags = UC_GPRS_HIGH;
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
uc_flags |= UC_VXRS;
- } else
+ } else {
frame_size -= sizeof(frame->uc.uc_mcontext_ext.vxrs_low) +
sizeof(frame->uc.uc_mcontext_ext.vxrs_high);
+ }
frame = get_sigframe(&ksig->ka, regs, frame_size);
if (frame == (void __user *) -1UL)
return -EFAULT;
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index 514feadd4c58..5c46c2659305 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -22,6 +22,7 @@
#include <asm/ipl.h>
#include <asm/sclp.h>
#include <asm/maccess.h>
+#include <asm/fpu/api.h>
#define PTR_ADD(x, y) (((char *) (x)) + ((unsigned long) (y)))
#define PTR_SUB(x, y) (((char *) (x)) - ((unsigned long) (y)))
@@ -319,7 +320,7 @@ static void *fill_cpu_elf_notes(void *ptr, int cpu, struct save_area *sa)
ptr = nt_init(ptr, NT_S390_TODPREG, &sa->todpreg, sizeof(sa->todpreg));
ptr = nt_init(ptr, NT_S390_CTRS, &sa->ctrs, sizeof(sa->ctrs));
ptr = nt_init(ptr, NT_S390_PREFIX, &sa->prefix, sizeof(sa->prefix));
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
ptr = nt_init(ptr, NT_S390_VXRS_HIGH,
&sa->vxrs_high, sizeof(sa->vxrs_high));
ptr = nt_init(ptr, NT_S390_VXRS_LOW,
@@ -343,7 +344,7 @@ static size_t get_cpu_elf_notes_size(void)
size += nt_size(NT_S390_TODPREG, sizeof(sa->todpreg));
size += nt_size(NT_S390_CTRS, sizeof(sa->ctrs));
size += nt_size(NT_S390_PREFIX, sizeof(sa->prefix));
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
size += nt_size(NT_S390_VXRS_HIGH, sizeof(sa->vxrs_high));
size += nt_size(NT_S390_VXRS_LOW, sizeof(sa->vxrs_low));
}
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index eb43e5922a25..2345ea332b97 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -229,10 +229,8 @@ static __init void detect_machine_facilities(void)
}
if (test_facility(51))
S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_LC;
- if (test_facility(129)) {
- S390_lowcore.machine_flags |= MACHINE_FLAG_VX;
+ if (test_facility(129))
system_ctl_set_bit(0, CR0_VECTOR_BIT);
- }
if (test_facility(130))
S390_lowcore.machine_flags |= MACHINE_FLAG_NX;
if (test_facility(133))
@@ -271,14 +269,6 @@ static inline void setup_access_registers(void)
restore_access_regs(acrs);
}
-static int __init disable_vector_extension(char *str)
-{
- S390_lowcore.machine_flags &= ~MACHINE_FLAG_VX;
- system_ctl_clear_bit(0, CR0_VECTOR_BIT);
- return 0;
-}
-early_param("novx", disable_vector_extension);
-
char __bootdata(early_command_line)[COMMAND_LINE_SIZE];
static void __init setup_boot_command_line(void)
{
diff --git a/arch/s390/kernel/fpu.c b/arch/s390/kernel/fpu.c
index 4666b29ac8a1..9e7c15fccfea 100644
--- a/arch/s390/kernel/fpu.c
+++ b/arch/s390/kernel/fpu.c
@@ -24,7 +24,7 @@ void __kernel_fpu_begin(struct kernel_fpu *state, u32 flags)
/* Save floating point control */
asm volatile("stfpc %0" : "=Q" (state->fpc));
- if (!MACHINE_HAS_VX) {
+ if (!cpu_has_vx()) {
if (flags & KERNEL_VXR_V0V7) {
/* Save floating-point registers */
asm volatile("std 0,%0" : "=Q" (state->fprs[0]));
@@ -106,7 +106,7 @@ void __kernel_fpu_end(struct kernel_fpu *state, u32 flags)
/* Restore floating-point controls */
asm volatile("lfpc %0" : : "Q" (state->fpc));
- if (!MACHINE_HAS_VX) {
+ if (!cpu_has_vx()) {
if (flags & KERNEL_VXR_V0V7) {
/* Restore floating-point registers */
asm volatile("ld 0,%0" : : "Q" (state->fprs[0]));
@@ -177,11 +177,11 @@ EXPORT_SYMBOL(__kernel_fpu_end);
void __load_fpu_regs(void)
{
- struct fpu *state = &current->thread.fpu;
unsigned long *regs = current->thread.fpu.regs;
+ struct fpu *state = &current->thread.fpu;
- asm volatile("lfpc %0" : : "Q" (state->fpc));
- if (likely(MACHINE_HAS_VX)) {
+ sfpc_safe(state->fpc);
+ if (likely(cpu_has_vx())) {
asm volatile("lgr 1,%0\n"
"VLM 0,15,0,1\n"
"VLM 16,31,256,1\n"
@@ -232,7 +232,7 @@ void save_fpu_regs(void)
regs = current->thread.fpu.regs;
asm volatile("stfpc %0" : "=Q" (state->fpc));
- if (likely(MACHINE_HAS_VX)) {
+ if (likely(cpu_has_vx())) {
asm volatile("lgr 1,%0\n"
"VSTM 0,15,0,1\n"
"VSTM 16,31,256,1\n"
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index bb0d4d68fcbe..aa22ffc16bcd 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -91,7 +91,7 @@ static noinline void __machine_kdump(void *image)
}
/* Store status of the boot CPU */
mcesa = __va(S390_lowcore.mcesad & MCESA_ORIGIN_MASK);
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
save_vx_regs((__vector128 *) mcesa->vector_save_area);
if (MACHINE_HAS_GS) {
local_ctl_store(2, &cr2_old.reg);
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 0daf0f1cdfc9..9ad44c26d1a2 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -32,6 +32,7 @@
#include <asm/asm-offsets.h>
#include <asm/pai.h>
#include <asm/vx-insn.h>
+#include <asm/fpu/api.h>
struct mcck_struct {
unsigned int kill_task : 1;
@@ -45,7 +46,7 @@ static DEFINE_PER_CPU(struct mcck_struct, cpu_mcck);
static inline int nmi_needs_mcesa(void)
{
- return MACHINE_HAS_VX || MACHINE_HAS_GS;
+ return cpu_has_vx() || MACHINE_HAS_GS;
}
/*
@@ -159,16 +160,17 @@ NOKPROBE_SYMBOL(s390_handle_damage);
void s390_handle_mcck(void)
{
struct mcck_struct mcck;
+ unsigned long mflags;
/*
* Disable machine checks and get the current state of accumulated
* machine checks. Afterwards delete the old state and enable machine
* checks again.
*/
- local_mcck_disable();
+ local_mcck_save(mflags);
mcck = *this_cpu_ptr(&cpu_mcck);
memset(this_cpu_ptr(&cpu_mcck), 0, sizeof(mcck));
- local_mcck_enable();
+ local_mcck_restore(mflags);
if (mcck.channel_report)
crw_handle_channel_report();
@@ -234,7 +236,7 @@ static int notrace s390_validate_registers(union mci mci)
}
mcesa = __va(S390_lowcore.mcesad & MCESA_ORIGIN_MASK);
- if (!MACHINE_HAS_VX) {
+ if (!cpu_has_vx()) {
/* Validate floating point registers */
asm volatile(
" ld 0,0(%0)\n"
diff --git a/arch/s390/kernel/perf_regs.c b/arch/s390/kernel/perf_regs.c
index 6e9e5d5e927e..3d93656bd948 100644
--- a/arch/s390/kernel/perf_regs.c
+++ b/arch/s390/kernel/perf_regs.c
@@ -20,8 +20,10 @@ u64 perf_reg_value(struct pt_regs *regs, int idx)
return 0;
idx -= PERF_REG_S390_FP0;
- fp = MACHINE_HAS_VX ? *(freg_t *)(current->thread.fpu.vxrs + idx)
- : current->thread.fpu.fprs[idx];
+ if (cpu_has_vx())
+ fp = *(freg_t *)(current->thread.fpu.vxrs + idx);
+ else
+ fp = current->thread.fpu.fprs[idx];
return fp.ui;
}
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 258000417724..4e3b366589fb 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -89,7 +89,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
*/
save_fpu_regs();
- memcpy(dst, src, arch_task_struct_size);
+ *dst = *src;
dst->thread.fpu.regs = dst->thread.fpu.fprs;
/*
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index 0a999c8226d7..65c1464eea4f 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -201,11 +201,8 @@ static int __init setup_hwcaps(void)
if (MACHINE_HAS_TE)
elf_hwcap |= HWCAP_TE;
- /*
- * Vector extension can be disabled with the "novx" parameter.
- * Use MACHINE_HAS_VX instead of facility bit 129.
- */
- if (MACHINE_HAS_VX) {
+ /* vector */
+ if (test_facility(129)) {
elf_hwcap |= HWCAP_VXRS;
if (test_facility(134))
elf_hwcap |= HWCAP_VXRS_BCD;
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 046403471c5d..2e6754b62b20 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -30,6 +30,7 @@
#include <asm/switch_to.h>
#include <asm/runtime_instr.h>
#include <asm/facility.h>
+#include <asm/fpu/api.h>
#include "entry.h"
@@ -254,7 +255,7 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr)
* or the child->thread.fpu.vxrs array
*/
offset = addr - offsetof(struct user, regs.fp_regs.fprs);
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
tmp = *(addr_t *)
((addr_t) child->thread.fpu.vxrs + 2*offset);
else
@@ -392,8 +393,7 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
/*
* floating point control reg. is in the thread structure
*/
- if ((unsigned int) data != 0 ||
- test_fp_ctl(data >> (BITS_PER_LONG - 32)))
+ if ((unsigned int)data != 0)
return -EINVAL;
child->thread.fpu.fpc = data >> (BITS_PER_LONG - 32);
@@ -403,7 +403,7 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
* or the child->thread.fpu.vxrs array
*/
offset = addr - offsetof(struct user, regs.fp_regs.fprs);
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
*(addr_t *)((addr_t)
child->thread.fpu.vxrs + 2*offset) = data;
else
@@ -630,7 +630,7 @@ static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
* or the child->thread.fpu.vxrs array
*/
offset = addr - offsetof(struct compat_user, regs.fp_regs.fprs);
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
tmp = *(__u32 *)
((addr_t) child->thread.fpu.vxrs + 2*offset);
else
@@ -748,8 +748,6 @@ static int __poke_user_compat(struct task_struct *child,
/*
* floating point control reg. is in the thread structure
*/
- if (test_fp_ctl(tmp))
- return -EINVAL;
child->thread.fpu.fpc = data;
} else if (addr < offsetof(struct compat_user, regs.fp_regs) + sizeof(s390_fp_regs)) {
@@ -758,7 +756,7 @@ static int __poke_user_compat(struct task_struct *child,
* or the child->thread.fpu.vxrs array
*/
offset = addr - offsetof(struct compat_user, regs.fp_regs.fprs);
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
*(__u32 *)((addr_t)
child->thread.fpu.vxrs + 2*offset) = tmp;
else
@@ -914,7 +912,7 @@ static int s390_fpregs_set(struct task_struct *target,
if (target == current)
save_fpu_regs();
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
convert_vx_to_fp(fprs, target->thread.fpu.vxrs);
else
memcpy(&fprs, target->thread.fpu.fprs, sizeof(fprs));
@@ -926,7 +924,7 @@ static int s390_fpregs_set(struct task_struct *target,
0, offsetof(s390_fp_regs, fprs));
if (rc)
return rc;
- if (ufpc[1] != 0 || test_fp_ctl(ufpc[0]))
+ if (ufpc[1] != 0)
return -EINVAL;
target->thread.fpu.fpc = ufpc[0];
}
@@ -937,7 +935,7 @@ static int s390_fpregs_set(struct task_struct *target,
if (rc)
return rc;
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
convert_fp_to_vx(target->thread.fpu.vxrs, fprs);
else
memcpy(target->thread.fpu.fprs, &fprs, sizeof(fprs));
@@ -988,7 +986,7 @@ static int s390_vxrs_low_get(struct task_struct *target,
__u64 vxrs[__NUM_VXRS_LOW];
int i;
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
return -ENODEV;
if (target == current)
save_fpu_regs();
@@ -1005,7 +1003,7 @@ static int s390_vxrs_low_set(struct task_struct *target,
__u64 vxrs[__NUM_VXRS_LOW];
int i, rc;
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
return -ENODEV;
if (target == current)
save_fpu_regs();
@@ -1025,7 +1023,7 @@ static int s390_vxrs_high_get(struct task_struct *target,
const struct user_regset *regset,
struct membuf to)
{
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
return -ENODEV;
if (target == current)
save_fpu_regs();
@@ -1040,7 +1038,7 @@ static int s390_vxrs_high_set(struct task_struct *target,
{
int rc;
- if (!MACHINE_HAS_VX)
+ if (!cpu_has_vx())
return -ENODEV;
if (target == current)
save_fpu_regs();
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 5701356f4f33..d1f3b56e7afc 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -408,15 +408,15 @@ static void __init setup_lowcore(void)
lc->restart_psw.mask = PSW_KERNEL_BITS & ~PSW_MASK_DAT;
lc->restart_psw.addr = __pa(restart_int_handler);
- lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
+ lc->external_new_psw.mask = PSW_KERNEL_BITS;
lc->external_new_psw.addr = (unsigned long) ext_int_handler;
- lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
+ lc->svc_new_psw.mask = PSW_KERNEL_BITS;
lc->svc_new_psw.addr = (unsigned long) system_call;
- lc->program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
+ lc->program_new_psw.mask = PSW_KERNEL_BITS;
lc->program_new_psw.addr = (unsigned long) pgm_check_handler;
lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
lc->mcck_new_psw.addr = (unsigned long) mcck_int_handler;
- lc->io_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
+ lc->io_new_psw.mask = PSW_KERNEL_BITS;
lc->io_new_psw.addr = (unsigned long) io_int_handler;
lc->clock_comparator = clock_comparator_max;
lc->current_task = (unsigned long)&init_task;
@@ -820,22 +820,6 @@ static void __init setup_randomness(void)
}
/*
- * Find the correct size for the task_struct. This depends on
- * the size of the struct fpu at the end of the thread_struct
- * which is embedded in the task_struct.
- */
-static void __init setup_task_size(void)
-{
- int task_size = sizeof(struct task_struct);
-
- if (!MACHINE_HAS_VX) {
- task_size -= sizeof(__vector128) * __NUM_VXRS;
- task_size += sizeof(freg_t) * __NUM_FPRS;
- }
- arch_task_struct_size = task_size;
-}
-
-/*
* Issue diagnose 318 to set the control program name and
* version codes.
*/
@@ -927,7 +911,6 @@ void __init setup_arch(char **cmdline_p)
os_info_init();
setup_ipl();
- setup_task_size();
setup_control_program_code();
/* Do some memory reservations *before* memory is added to memblock */
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 48e46809ee27..43e9661cd715 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -150,10 +150,6 @@ static int restore_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
if (!is_ri_task(current) && (user_sregs.regs.psw.mask & PSW_MASK_RI))
return -EINVAL;
- /* Test the floating-point-control word. */
- if (test_fp_ctl(user_sregs.fpregs.fpc))
- return -EINVAL;
-
/* Use regs->psw.mask instead of PSW_USER_BITS to preserve PER bit. */
regs->psw.mask = (regs->psw.mask & ~(PSW_MASK_USER | PSW_MASK_RI)) |
(user_sregs.regs.psw.mask & (PSW_MASK_USER | PSW_MASK_RI));
@@ -183,7 +179,7 @@ static int save_sigregs_ext(struct pt_regs *regs,
int i;
/* Save vector registers to signal stack */
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
for (i = 0; i < __NUM_VXRS_LOW; i++)
vxrs[i] = current->thread.fpu.vxrs[i].low;
if (__copy_to_user(&sregs_ext->vxrs_low, vxrs,
@@ -203,7 +199,7 @@ static int restore_sigregs_ext(struct pt_regs *regs,
int i;
/* Restore vector registers from signal stack */
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
if (__copy_from_user(vxrs, &sregs_ext->vxrs_low,
sizeof(sregs_ext->vxrs_low)) ||
__copy_from_user(current->thread.fpu.vxrs + __NUM_VXRS_LOW,
@@ -301,7 +297,7 @@ static int setup_frame(int sig, struct k_sigaction *ka,
* included in the signal frame on a 31-bit system.
*/
frame_size = sizeof(*frame) - sizeof(frame->sregs_ext);
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
frame_size += sizeof(frame->sregs_ext);
frame = get_sigframe(ka, regs, frame_size);
if (frame == (void __user *) -1UL)
@@ -378,7 +374,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
* included in the signal frame on a 31-bit system.
*/
uc_flags = 0;
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
frame_size += sizeof(_sigregs_ext);
uc_flags |= UC_VXRS;
}
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index f7fcfff09acf..c39d9f0d4b1c 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -582,7 +582,7 @@ int smp_store_status(int cpu)
if (__pcpu_sigp_relax(pcpu->address, SIGP_STORE_STATUS_AT_ADDRESS,
pa) != SIGP_CC_ORDER_CODE_ACCEPTED)
return -EIO;
- if (!MACHINE_HAS_VX && !MACHINE_HAS_GS)
+ if (!cpu_has_vx() && !MACHINE_HAS_GS)
return 0;
pa = lc->mcesad & MCESA_ORIGIN_MASK;
if (MACHINE_HAS_GS)
@@ -638,7 +638,7 @@ void __init smp_save_dump_ipl_cpu(void)
copy_oldmem_kernel(regs, __LC_FPREGS_SAVE_AREA, 512);
save_area_add_regs(sa, regs);
memblock_free(regs, 512);
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
save_area_add_vxrs(sa, boot_cpu_vector_save_area);
}
@@ -671,7 +671,7 @@ void __init smp_save_dump_secondary_cpus(void)
panic("could not allocate memory for save area\n");
__pcpu_sigp_relax(addr, SIGP_STORE_STATUS_AT_ADDRESS, __pa(page));
save_area_add_regs(sa, page);
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
__pcpu_sigp_relax(addr, SIGP_STORE_ADDITIONAL_STATUS, __pa(page));
save_area_add_vxrs(sa, page);
}
diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
index b5e364358ce4..f6f8f498c9be 100644
--- a/arch/s390/kernel/sysinfo.c
+++ b/arch/s390/kernel/sysinfo.c
@@ -81,10 +81,12 @@ static bool convert_ext_name(unsigned char encoding, char *name, size_t len)
static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
{
+ bool has_var_cap;
int i;
if (stsi(info, 1, 1, 1))
return;
+ has_var_cap = !!info->model_var_cap[0];
EBCASC(info->manufacturer, sizeof(info->manufacturer));
EBCASC(info->type, sizeof(info->type));
EBCASC(info->model, sizeof(info->model));
@@ -93,6 +95,8 @@ static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
EBCASC(info->model_capacity, sizeof(info->model_capacity));
EBCASC(info->model_perm_cap, sizeof(info->model_perm_cap));
EBCASC(info->model_temp_cap, sizeof(info->model_temp_cap));
+ if (has_var_cap)
+ EBCASC(info->model_var_cap, sizeof(info->model_var_cap));
seq_printf(m, "Manufacturer: %-16.16s\n", info->manufacturer);
seq_printf(m, "Type: %-4.4s\n", info->type);
if (info->lic)
@@ -120,12 +124,18 @@ static void stsi_1_1_1(struct seq_file *m, struct sysinfo_1_1_1 *info)
seq_printf(m, "Model Temp. Capacity: %-16.16s %08u\n",
info->model_temp_cap,
info->model_temp_cap_rating);
+ if (has_var_cap && info->model_var_cap_rating)
+ seq_printf(m, "Model Var. Capacity: %-16.16s %08u\n",
+ info->model_var_cap,
+ info->model_var_cap_rating);
if (info->ncr)
seq_printf(m, "Nominal Cap. Rating: %08u\n", info->ncr);
if (info->npr)
seq_printf(m, "Nominal Perm. Rating: %08u\n", info->npr);
if (info->ntr)
seq_printf(m, "Nominal Temp. Rating: %08u\n", info->ntr);
+ if (has_var_cap && info->nvr)
+ seq_printf(m, "Nominal Var. Rating: %08u\n", info->nvr);
if (info->cai) {
seq_printf(m, "Capacity Adj. Ind.: %d\n", info->cai);
seq_printf(m, "Capacity Ch. Reason: %d\n", info->ccr);
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index cc3e3a01dfa5..46dac4540ca8 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -195,7 +195,7 @@ static void vector_exception(struct pt_regs *regs)
{
int si_code, vic;
- if (!MACHINE_HAS_VX) {
+ if (!cpu_has_vx()) {
do_trap(regs, SIGILL, ILL_ILLOPN, "illegal operation");
return;
}
@@ -288,6 +288,17 @@ static void __init test_monitor_call(void)
void __init trap_init(void)
{
+ unsigned long flags;
+ struct ctlreg cr0;
+
+ local_irq_save(flags);
+ cr0 = local_ctl_clear_bit(0, CR0_LOW_ADDRESS_PROTECTION_BIT);
+ psw_bits(S390_lowcore.external_new_psw).mcheck = 1;
+ psw_bits(S390_lowcore.program_new_psw).mcheck = 1;
+ psw_bits(S390_lowcore.svc_new_psw).mcheck = 1;
+ psw_bits(S390_lowcore.io_new_psw).mcheck = 1;
+ local_ctl_load(0, &cr0);
+ local_irq_restore(flags);
local_mcck_enable();
test_monitor_call();
}
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 2ae201ebf90b..e32ef446f451 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -52,6 +52,7 @@ SECTIONS
SOFTIRQENTRY_TEXT
FTRACE_HOTPATCH_TRAMPOLINES_TEXT
*(.text.*_indirect_*)
+ *(.fixup)
*(.gnu.warning)
. = ALIGN(PAGE_SIZE);
_etext = .; /* End of text section */
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index efaebba5ee19..fc4007cc067a 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -639,7 +639,7 @@ static int __write_machine_check(struct kvm_vcpu *vcpu,
rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
/* Register-save areas */
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
} else {
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 7aa0e668488f..acc81ca6492e 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -618,7 +618,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = MACHINE_HAS_ESOP;
break;
case KVM_CAP_S390_VECTOR_REGISTERS:
- r = MACHINE_HAS_VX;
+ r = test_facility(129);
break;
case KVM_CAP_S390_RI:
r = test_facility(64);
@@ -767,7 +767,7 @@ int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
mutex_lock(&kvm->lock);
if (kvm->created_vcpus) {
r = -EBUSY;
- } else if (MACHINE_HAS_VX) {
+ } else if (cpu_has_vx()) {
set_kvm_facility(kvm->arch.model.fac_mask, 129);
set_kvm_facility(kvm->arch.model.fac_list, 129);
if (test_facility(134)) {
@@ -3962,9 +3962,9 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
if (test_kvm_facility(vcpu->kvm, 156))
vcpu->run->kvm_valid_regs |= KVM_SYNC_ETOKEN;
/* fprs can be synchronized via vrs, even if the guest has no vx. With
- * MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
+ * cpu_has_vx(), (load|store)_fpu_regs() will work with vrs format.
*/
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS;
else
vcpu->run->kvm_valid_regs |= KVM_SYNC_FPRS;
@@ -4316,18 +4316,13 @@ int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
vcpu_load(vcpu);
- if (test_fp_ctl(fpu->fpc)) {
- ret = -EINVAL;
- goto out;
- }
vcpu->run->s.regs.fpc = fpu->fpc;
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
convert_fp_to_vx((__vector128 *) vcpu->run->s.regs.vrs,
(freg_t *) fpu->fprs);
else
memcpy(vcpu->run->s.regs.fprs, &fpu->fprs, sizeof(fpu->fprs));
-out:
vcpu_put(vcpu);
return ret;
}
@@ -4336,9 +4331,7 @@ int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
vcpu_load(vcpu);
- /* make sure we have the latest values */
- save_fpu_regs();
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
convert_vx_to_fp((freg_t *) fpu->fprs,
(__vector128 *) vcpu->run->s.regs.vrs);
else
@@ -4963,14 +4956,11 @@ static void sync_regs(struct kvm_vcpu *vcpu)
save_fpu_regs();
vcpu->arch.host_fpregs.fpc = current->thread.fpu.fpc;
vcpu->arch.host_fpregs.regs = current->thread.fpu.regs;
- if (MACHINE_HAS_VX)
+ if (cpu_has_vx())
current->thread.fpu.regs = vcpu->run->s.regs.vrs;
else
current->thread.fpu.regs = vcpu->run->s.regs.fprs;
current->thread.fpu.fpc = vcpu->run->s.regs.fpc;
- if (test_fp_ctl(current->thread.fpu.fpc))
- /* User space provided an invalid FPC, let's clear it */
- current->thread.fpu.fpc = 0;
/* Sync fmt2 only data */
if (likely(!kvm_s390_pv_cpu_is_protected(vcpu))) {
@@ -5145,7 +5135,7 @@ int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
gpa -= __LC_FPREGS_SAVE_AREA;
/* manually convert vector registers if necessary */
- if (MACHINE_HAS_VX) {
+ if (cpu_has_vx()) {
convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
rc = write_guest_abs(vcpu, gpa + __LC_FPREGS_SAVE_AREA,
fprs, 128);
diff --git a/arch/s390/lib/test_unwind.c b/arch/s390/lib/test_unwind.c
index 7231bf97b93a..2848e3fb2ff5 100644
--- a/arch/s390/lib/test_unwind.c
+++ b/arch/s390/lib/test_unwind.c
@@ -350,15 +350,15 @@ static noinline int unwindme_func3(struct unwindme *u)
/* This function must appear in the backtrace. */
static noinline int unwindme_func2(struct unwindme *u)
{
- unsigned long flags;
+ unsigned long flags, mflags;
int rc;
if (u->flags & UWM_SWITCH_STACK) {
local_irq_save(flags);
- local_mcck_disable();
+ local_mcck_save(mflags);
rc = call_on_stack(1, S390_lowcore.nodat_stack,
int, unwindme_func3, struct unwindme *, u);
- local_mcck_enable();
+ local_mcck_restore(mflags);
local_irq_restore(flags);
return rc;
} else {
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 5cb92941540b..99422926efe1 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -125,32 +125,23 @@ static inline pte_t ptep_flush_lazy(struct mm_struct *mm,
static inline pgste_t pgste_get_lock(pte_t *ptep)
{
- unsigned long new = 0;
+ unsigned long value = 0;
#ifdef CONFIG_PGSTE
- unsigned long old;
-
- asm(
- " lg %0,%2\n"
- "0: lgr %1,%0\n"
- " nihh %0,0xff7f\n" /* clear PCL bit in old */
- " oihh %1,0x0080\n" /* set PCL bit in new */
- " csg %0,%1,%2\n"
- " jl 0b\n"
- : "=&d" (old), "=&d" (new), "=Q" (ptep[PTRS_PER_PTE])
- : "Q" (ptep[PTRS_PER_PTE]) : "cc", "memory");
+ unsigned long *ptr = (unsigned long *)(ptep + PTRS_PER_PTE);
+
+ do {
+ value = __atomic64_or_barrier(PGSTE_PCL_BIT, ptr);
+ } while (value & PGSTE_PCL_BIT);
+ value |= PGSTE_PCL_BIT;
#endif
- return __pgste(new);
+ return __pgste(value);
}
static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste)
{
#ifdef CONFIG_PGSTE
- asm(
- " nihh %1,0xff7f\n" /* clear PCL bit */
- " stg %1,%0\n"
- : "=Q" (ptep[PTRS_PER_PTE])
- : "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE])
- : "cc", "memory");
+ barrier();
+ WRITE_ONCE(*(unsigned long *)(ptep + PTRS_PER_PTE), pgste_val(pgste) & ~PGSTE_PCL_BIT);
#endif
}
diff --git a/arch/s390/tools/gen_facilities.c b/arch/s390/tools/gen_facilities.c
index cb0aff5c0187..68580cbea4e6 100644
--- a/arch/s390/tools/gen_facilities.c
+++ b/arch/s390/tools/gen_facilities.c
@@ -46,6 +46,7 @@ static struct facility_def facility_defs[] = {
#endif
#ifdef CONFIG_HAVE_MARCH_Z13_FEATURES
53, /* load-and-zero-rightmost-byte, etc. */
+ 129, /* vector */
#endif
#ifdef CONFIG_HAVE_MARCH_Z14_FEATURES
58, /* miscellaneous-instruction-extension 2 */