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-rw-r--r--MAINTAINERS4
-rw-r--r--arch/s390/Kconfig7
-rw-r--r--arch/s390/configs/debug_defconfig1
-rw-r--r--arch/s390/configs/defconfig1
-rw-r--r--arch/s390/configs/zfcpdump_defconfig1
-rw-r--r--arch/s390/include/asm/pci_io.h32
-rw-r--r--arch/s390/kernel/fpu.c1
-rw-r--r--arch/s390/kernel/perf_pai_crypto.c80
-rw-r--r--arch/s390/kernel/perf_pai_ext.c79
-rw-r--r--arch/s390/kernel/ptrace.c1
-rw-r--r--arch/s390/mm/fault.c4
-rw-r--r--arch/s390/pci/pci_mmio.c12
-rw-r--r--drivers/s390/crypto/vfio_ap_ops.c268
-rw-r--r--drivers/s390/crypto/vfio_ap_private.h3
14 files changed, 299 insertions, 195 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index e350c4e6a198..dec0e3a84d4f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19124,7 +19124,7 @@ F: drivers/iommu/s390-iommu.c
S390 IUCV NETWORK LAYER
M: Alexandra Winter <wintera@linux.ibm.com>
-M: Wenjia Zhang <wenjia@linux.ibm.com>
+M: Thorsten Winkler <twinkler@linux.ibm.com>
L: linux-s390@vger.kernel.org
L: netdev@vger.kernel.org
S: Supported
@@ -19143,7 +19143,7 @@ F: arch/s390/mm
S390 NETWORK DRIVERS
M: Alexandra Winter <wintera@linux.ibm.com>
-M: Wenjia Zhang <wenjia@linux.ibm.com>
+M: Thorsten Winkler <twinkler@linux.ibm.com>
L: linux-s390@vger.kernel.org
L: netdev@vger.kernel.org
S: Supported
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8f39f0424796..fe565f3a3a91 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -216,7 +216,6 @@ config S390
select HAVE_VIRT_CPU_ACCOUNTING_IDLE
select IOMMU_HELPER if PCI
select IOMMU_SUPPORT if PCI
- select KEXEC
select MMU_GATHER_MERGE_VMAS
select MMU_GATHER_NO_GATHER
select MMU_GATHER_RCU_TABLE_FREE
@@ -443,7 +442,7 @@ config COMMAND_LINE_SIZE
line.
config COMPAT
- def_bool y
+ def_bool n
prompt "Kernel support for 31 bit emulation"
select ARCH_WANT_OLD_COMPAT_IPC
select COMPAT_OLD_SIGACTION
@@ -454,7 +453,9 @@ config COMPAT
Select this option if you want to enable your system kernel to
handle system-calls from ELF binaries for 31 bit ESA. This option
(and some other stuff like libraries and such) is needed for
- executing 31 bit applications. It is safe to say "Y".
+ executing 31 bit applications.
+
+ If unsure say N.
config SMP
def_bool y
diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig
index 85490d9373fc..67ba0157fbdb 100644
--- a/arch/s390/configs/debug_defconfig
+++ b/arch/s390/configs/debug_defconfig
@@ -40,6 +40,7 @@ CONFIG_SCHED_AUTOGROUP=y
CONFIG_EXPERT=y
# CONFIG_SYSFS_SYSCALL is not set
CONFIG_PROFILING=y
+CONFIG_KEXEC=y
CONFIG_KEXEC_FILE=y
CONFIG_KEXEC_SIG=y
CONFIG_CRASH_DUMP=y
diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig
index fb690fbbf54b..4c2650c1fbdd 100644
--- a/arch/s390/configs/defconfig
+++ b/arch/s390/configs/defconfig
@@ -38,6 +38,7 @@ CONFIG_SCHED_AUTOGROUP=y
CONFIG_EXPERT=y
# CONFIG_SYSFS_SYSCALL is not set
CONFIG_PROFILING=y
+CONFIG_KEXEC=y
CONFIG_KEXEC_FILE=y
CONFIG_KEXEC_SIG=y
CONFIG_CRASH_DUMP=y
diff --git a/arch/s390/configs/zfcpdump_defconfig b/arch/s390/configs/zfcpdump_defconfig
index 47028450eee1..30d2a1687665 100644
--- a/arch/s390/configs/zfcpdump_defconfig
+++ b/arch/s390/configs/zfcpdump_defconfig
@@ -10,7 +10,6 @@ CONFIG_BLK_DEV_INITRD=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_CRASH_DUMP=y
CONFIG_MARCH_Z13=y
-# CONFIG_COMPAT is not set
CONFIG_NR_CPUS=2
CONFIG_HZ_100=y
# CONFIG_CHSC_SCH is not set
diff --git a/arch/s390/include/asm/pci_io.h b/arch/s390/include/asm/pci_io.h
index 287bb88f7698..2686bee800e3 100644
--- a/arch/s390/include/asm/pci_io.h
+++ b/arch/s390/include/asm/pci_io.h
@@ -11,6 +11,8 @@
/* I/O size constraints */
#define ZPCI_MAX_READ_SIZE 8
#define ZPCI_MAX_WRITE_SIZE 128
+#define ZPCI_BOUNDARY_SIZE (1 << 12)
+#define ZPCI_BOUNDARY_MASK (ZPCI_BOUNDARY_SIZE - 1)
/* I/O Map */
#define ZPCI_IOMAP_SHIFT 48
@@ -125,16 +127,18 @@ out:
int zpci_write_block(volatile void __iomem *dst, const void *src,
unsigned long len);
-static inline u8 zpci_get_max_write_size(u64 src, u64 dst, int len, int max)
+static inline int zpci_get_max_io_size(u64 src, u64 dst, int len, int max)
{
- int count = len > max ? max : len, size = 1;
+ int offset = dst & ZPCI_BOUNDARY_MASK;
+ int size;
- while (!(src & 0x1) && !(dst & 0x1) && ((size << 1) <= count)) {
- dst = dst >> 1;
- src = src >> 1;
- size = size << 1;
- }
- return size;
+ size = min3(len, ZPCI_BOUNDARY_SIZE - offset, max);
+ if (IS_ALIGNED(src, 8) && IS_ALIGNED(dst, 8) && IS_ALIGNED(size, 8))
+ return size;
+
+ if (size >= 8)
+ return 8;
+ return rounddown_pow_of_two(size);
}
static inline int zpci_memcpy_fromio(void *dst,
@@ -144,9 +148,9 @@ static inline int zpci_memcpy_fromio(void *dst,
int size, rc = 0;
while (n > 0) {
- size = zpci_get_max_write_size((u64 __force) src,
- (u64) dst, n,
- ZPCI_MAX_READ_SIZE);
+ size = zpci_get_max_io_size((u64 __force) src,
+ (u64) dst, n,
+ ZPCI_MAX_READ_SIZE);
rc = zpci_read_single(dst, src, size);
if (rc)
break;
@@ -166,9 +170,9 @@ static inline int zpci_memcpy_toio(volatile void __iomem *dst,
return -EINVAL;
while (n > 0) {
- size = zpci_get_max_write_size((u64 __force) dst,
- (u64) src, n,
- ZPCI_MAX_WRITE_SIZE);
+ size = zpci_get_max_io_size((u64 __force) dst,
+ (u64) src, n,
+ ZPCI_MAX_WRITE_SIZE);
if (size > 8) /* main path */
rc = zpci_write_block(dst, src, size);
else
diff --git a/arch/s390/kernel/fpu.c b/arch/s390/kernel/fpu.c
index 9e7c15fccfea..a4f3449cc814 100644
--- a/arch/s390/kernel/fpu.c
+++ b/arch/s390/kernel/fpu.c
@@ -208,7 +208,6 @@ void __load_fpu_regs(void)
}
clear_cpu_flag(CIF_FPU);
}
-EXPORT_SYMBOL(__load_fpu_regs);
void load_fpu_regs(void)
{
diff --git a/arch/s390/kernel/perf_pai_crypto.c b/arch/s390/kernel/perf_pai_crypto.c
index 39a91b00438a..bf8a672b15a4 100644
--- a/arch/s390/kernel/perf_pai_crypto.c
+++ b/arch/s390/kernel/perf_pai_crypto.c
@@ -111,11 +111,11 @@ static void paicrypt_event_destroy(struct perf_event *event)
mutex_unlock(&pai_reserve_mutex);
}
-static u64 paicrypt_getctr(struct paicrypt_map *cpump, int nr, bool kernel)
+static u64 paicrypt_getctr(unsigned long *page, int nr, bool kernel)
{
if (kernel)
nr += PAI_CRYPTO_MAXCTR;
- return cpump->page[nr];
+ return page[nr];
}
/* Read the counter values. Return value from location in CMP. For event
@@ -129,13 +129,13 @@ static u64 paicrypt_getdata(struct perf_event *event, bool kernel)
int i;
if (event->attr.config != PAI_CRYPTO_BASE) {
- return paicrypt_getctr(cpump,
+ return paicrypt_getctr(cpump->page,
event->attr.config - PAI_CRYPTO_BASE,
kernel);
}
for (i = 1; i <= paicrypt_cnt; i++) {
- u64 val = paicrypt_getctr(cpump, i, kernel);
+ u64 val = paicrypt_getctr(cpump->page, i, kernel);
if (!val)
continue;
@@ -317,10 +317,14 @@ static void paicrypt_start(struct perf_event *event, int flags)
* Events are added, deleted and re-added when 2 or more events
* are active at the same time.
*/
- if (!event->hw.last_tag) {
- event->hw.last_tag = 1;
- sum = paicrypt_getall(event); /* Get current value */
- local64_set(&event->hw.prev_count, sum);
+ if (!event->attr.sample_period) { /* Counting */
+ if (!event->hw.last_tag) {
+ event->hw.last_tag = 1;
+ sum = paicrypt_getall(event); /* Get current value */
+ local64_set(&event->hw.prev_count, sum);
+ }
+ } else { /* Sampling */
+ perf_sched_cb_inc(event->pmu);
}
}
@@ -336,19 +340,18 @@ static int paicrypt_add(struct perf_event *event, int flags)
local_ctl_set_bit(0, CR0_CRYPTOGRAPHY_COUNTER_BIT);
}
cpump->event = event;
- if (flags & PERF_EF_START && !event->attr.sample_period) {
- /* Only counting needs initial counter value */
+ if (flags & PERF_EF_START)
paicrypt_start(event, PERF_EF_RELOAD);
- }
event->hw.state = 0;
- if (event->attr.sample_period)
- perf_sched_cb_inc(event->pmu);
return 0;
}
static void paicrypt_stop(struct perf_event *event, int flags)
{
- paicrypt_read(event);
+ if (!event->attr.sample_period) /* Counting */
+ paicrypt_read(event);
+ else /* Sampling */
+ perf_sched_cb_dec(event->pmu);
event->hw.state = PERF_HES_STOPPED;
}
@@ -357,11 +360,7 @@ static void paicrypt_del(struct perf_event *event, int flags)
struct paicrypt_mapptr *mp = this_cpu_ptr(paicrypt_root.mapptr);
struct paicrypt_map *cpump = mp->mapptr;
- if (event->attr.sample_period)
- perf_sched_cb_dec(event->pmu);
- if (!event->attr.sample_period)
- /* Only counting needs to read counter */
- paicrypt_stop(event, PERF_EF_UPDATE);
+ paicrypt_stop(event, PERF_EF_UPDATE);
if (--cpump->active_events == 0) {
local_ctl_clear_bit(0, CR0_CRYPTOGRAPHY_COUNTER_BIT);
WRITE_ONCE(S390_lowcore.ccd, 0);
@@ -373,8 +372,7 @@ static void paicrypt_del(struct perf_event *event, int flags)
* 2 bytes: Number of counter
* 8 bytes: Value of counter
*/
-static size_t paicrypt_copy(struct pai_userdata *userdata,
- struct paicrypt_map *cpump,
+static size_t paicrypt_copy(struct pai_userdata *userdata, unsigned long *page,
bool exclude_user, bool exclude_kernel)
{
int i, outidx = 0;
@@ -383,9 +381,9 @@ static size_t paicrypt_copy(struct pai_userdata *userdata,
u64 val = 0;
if (!exclude_kernel)
- val += paicrypt_getctr(cpump, i, true);
+ val += paicrypt_getctr(page, i, true);
if (!exclude_user)
- val += paicrypt_getctr(cpump, i, false);
+ val += paicrypt_getctr(page, i, false);
if (val) {
userdata[outidx].num = i;
userdata[outidx].value = val;
@@ -395,25 +393,14 @@ static size_t paicrypt_copy(struct pai_userdata *userdata,
return outidx * sizeof(struct pai_userdata);
}
-static int paicrypt_push_sample(void)
+static int paicrypt_push_sample(size_t rawsize, struct paicrypt_map *cpump,
+ struct perf_event *event)
{
- struct paicrypt_mapptr *mp = this_cpu_ptr(paicrypt_root.mapptr);
- struct paicrypt_map *cpump = mp->mapptr;
- struct perf_event *event = cpump->event;
struct perf_sample_data data;
struct perf_raw_record raw;
struct pt_regs regs;
- size_t rawsize;
int overflow;
- if (!cpump->event) /* No event active */
- return 0;
- rawsize = paicrypt_copy(cpump->save, cpump,
- cpump->event->attr.exclude_user,
- cpump->event->attr.exclude_kernel);
- if (!rawsize) /* No incremented counters */
- return 0;
-
/* Setup perf sample */
memset(&regs, 0, sizeof(regs));
memset(&raw, 0, sizeof(raw));
@@ -444,6 +431,25 @@ static int paicrypt_push_sample(void)
return overflow;
}
+/* Check if there is data to be saved on schedule out of a task. */
+static int paicrypt_have_sample(void)
+{
+ struct paicrypt_mapptr *mp = this_cpu_ptr(paicrypt_root.mapptr);
+ struct paicrypt_map *cpump = mp->mapptr;
+ struct perf_event *event = cpump->event;
+ size_t rawsize;
+ int rc = 0;
+
+ if (!event) /* No event active */
+ return 0;
+ rawsize = paicrypt_copy(cpump->save, cpump->page,
+ cpump->event->attr.exclude_user,
+ cpump->event->attr.exclude_kernel);
+ if (rawsize) /* No incremented counters */
+ rc = paicrypt_push_sample(rawsize, cpump, event);
+ return rc;
+}
+
/* Called on schedule-in and schedule-out. No access to event structure,
* but for sampling only event CRYPTO_ALL is allowed.
*/
@@ -453,7 +459,7 @@ static void paicrypt_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sch
* results on schedule_out and if page was dirty, clear values.
*/
if (!sched_in)
- paicrypt_push_sample();
+ paicrypt_have_sample();
}
/* Attribute definitions for paicrypt interface. As with other CPU
diff --git a/arch/s390/kernel/perf_pai_ext.c b/arch/s390/kernel/perf_pai_ext.c
index e7013a2e8960..af7f2b538c8f 100644
--- a/arch/s390/kernel/perf_pai_ext.c
+++ b/arch/s390/kernel/perf_pai_ext.c
@@ -276,9 +276,9 @@ static int paiext_event_init(struct perf_event *event)
return 0;
}
-static u64 paiext_getctr(struct paiext_map *cpump, int nr)
+static u64 paiext_getctr(unsigned long *area, int nr)
{
- return cpump->area[nr];
+ return area[nr];
}
/* Read the counter values. Return value from location in buffer. For event
@@ -292,10 +292,11 @@ static u64 paiext_getdata(struct perf_event *event)
int i;
if (event->attr.config != PAI_NNPA_BASE)
- return paiext_getctr(cpump, event->attr.config - PAI_NNPA_BASE);
+ return paiext_getctr(cpump->area,
+ event->attr.config - PAI_NNPA_BASE);
for (i = 1; i <= paiext_cnt; i++)
- sum += paiext_getctr(cpump, i);
+ sum += paiext_getctr(cpump->area, i);
return sum;
}
@@ -320,11 +321,15 @@ static void paiext_start(struct perf_event *event, int flags)
{
u64 sum;
- if (event->hw.last_tag)
- return;
- event->hw.last_tag = 1;
- sum = paiext_getall(event); /* Get current value */
- local64_set(&event->hw.prev_count, sum);
+ if (!event->attr.sample_period) { /* Counting */
+ if (!event->hw.last_tag) {
+ event->hw.last_tag = 1;
+ sum = paiext_getall(event); /* Get current value */
+ local64_set(&event->hw.prev_count, sum);
+ }
+ } else { /* Sampling */
+ perf_sched_cb_inc(event->pmu);
+ }
}
static int paiext_add(struct perf_event *event, int flags)
@@ -341,21 +346,19 @@ static int paiext_add(struct perf_event *event, int flags)
debug_sprintf_event(paiext_dbg, 4, "%s 1508 %llx acc %llx\n",
__func__, S390_lowcore.aicd, pcb->acc);
}
- if (flags & PERF_EF_START && !event->attr.sample_period) {
- /* Only counting needs initial counter value */
+ cpump->event = event;
+ if (flags & PERF_EF_START)
paiext_start(event, PERF_EF_RELOAD);
- }
event->hw.state = 0;
- if (event->attr.sample_period) {
- cpump->event = event;
- perf_sched_cb_inc(event->pmu);
- }
return 0;
}
static void paiext_stop(struct perf_event *event, int flags)
{
- paiext_read(event);
+ if (!event->attr.sample_period) /* Counting */
+ paiext_read(event);
+ else /* Sampling */
+ perf_sched_cb_dec(event->pmu);
event->hw.state = PERF_HES_STOPPED;
}
@@ -365,12 +368,7 @@ static void paiext_del(struct perf_event *event, int flags)
struct paiext_map *cpump = mp->mapptr;
struct paiext_cb *pcb = cpump->paiext_cb;
- if (event->attr.sample_period)
- perf_sched_cb_dec(event->pmu);
- if (!event->attr.sample_period) {
- /* Only counting needs to read counter */
- paiext_stop(event, PERF_EF_UPDATE);
- }
+ paiext_stop(event, PERF_EF_UPDATE);
if (--cpump->active_events == 0) {
/* Disable CPU instruction lookup for PAIE1 control block */
local_ctl_clear_bit(0, CR0_PAI_EXTENSION_BIT);
@@ -386,13 +384,12 @@ static void paiext_del(struct perf_event *event, int flags)
* 2 bytes: Number of counter
* 8 bytes: Value of counter
*/
-static size_t paiext_copy(struct paiext_map *cpump)
+static size_t paiext_copy(struct pai_userdata *userdata, unsigned long *area)
{
- struct pai_userdata *userdata = cpump->save;
int i, outidx = 0;
for (i = 1; i <= paiext_cnt; i++) {
- u64 val = paiext_getctr(cpump, i);
+ u64 val = paiext_getctr(area, i);
if (val) {
userdata[outidx].num = i;
@@ -418,21 +415,14 @@ static size_t paiext_copy(struct paiext_map *cpump)
* sched_task() callback. That callback is not active after paiext_del()
* returns and has deleted the event on that CPU.
*/
-static int paiext_push_sample(void)
+static int paiext_push_sample(size_t rawsize, struct paiext_map *cpump,
+ struct perf_event *event)
{
- struct paiext_mapptr *mp = this_cpu_ptr(paiext_root.mapptr);
- struct paiext_map *cpump = mp->mapptr;
- struct perf_event *event = cpump->event;
struct perf_sample_data data;
struct perf_raw_record raw;
struct pt_regs regs;
- size_t rawsize;
int overflow;
- rawsize = paiext_copy(cpump);
- if (!rawsize) /* No incremented counters */
- return 0;
-
/* Setup perf sample */
memset(&regs, 0, sizeof(regs));
memset(&raw, 0, sizeof(raw));
@@ -461,6 +451,23 @@ static int paiext_push_sample(void)
return overflow;
}
+/* Check if there is data to be saved on schedule out of a task. */
+static int paiext_have_sample(void)
+{
+ struct paiext_mapptr *mp = this_cpu_ptr(paiext_root.mapptr);
+ struct paiext_map *cpump = mp->mapptr;
+ struct perf_event *event = cpump->event;
+ size_t rawsize;
+ int rc = 0;
+
+ if (!event)
+ return 0;
+ rawsize = paiext_copy(cpump->save, cpump->area);
+ if (rawsize) /* Incremented counters */
+ rc = paiext_push_sample(rawsize, cpump, event);
+ return rc;
+}
+
/* Called on schedule-in and schedule-out. No access to event structure,
* but for sampling only event NNPA_ALL is allowed.
*/
@@ -470,7 +477,7 @@ static void paiext_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched
* results on schedule_out and if page was dirty, clear values.
*/
if (!sched_in)
- paiext_push_sample();
+ paiext_have_sample();
}
/* Attribute definitions for pai extension1 interface. As with other CPU
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 2e6754b62b20..f1897a8bb221 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -917,7 +917,6 @@ static int s390_fpregs_set(struct task_struct *target,
else
memcpy(&fprs, target->thread.fpu.fprs, sizeof(fprs));
- /* If setting FPC, must validate it first. */
if (count > 0 && pos < offsetof(s390_fp_regs, fprs)) {
u32 ufpc[2] = { target->thread.fpu.fpc, 0 };
rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &ufpc,
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index ab4098886e56..ac4c78546d97 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -280,7 +280,6 @@ static void do_sigbus(struct pt_regs *regs)
static void do_exception(struct pt_regs *regs, int access)
{
struct vm_area_struct *vma;
- struct task_struct *tsk;
unsigned long address;
struct mm_struct *mm;
enum fault_type type;
@@ -289,7 +288,6 @@ static void do_exception(struct pt_regs *regs, int access)
vm_fault_t fault;
bool is_write;
- tsk = current;
/*
* The instruction that caused the program check has
* been nullified. Don't signal single step via SIGTRAP.
@@ -297,7 +295,7 @@ static void do_exception(struct pt_regs *regs, int access)
clear_thread_flag(TIF_PER_TRAP);
if (kprobe_page_fault(regs, 14))
return;
- mm = tsk->mm;
+ mm = current->mm;
address = get_fault_address(regs);
is_write = fault_is_write(regs);
type = get_fault_type(regs);
diff --git a/arch/s390/pci/pci_mmio.c b/arch/s390/pci/pci_mmio.c
index 588089332931..a90499c087f0 100644
--- a/arch/s390/pci/pci_mmio.c
+++ b/arch/s390/pci/pci_mmio.c
@@ -97,9 +97,9 @@ static inline int __memcpy_toio_inuser(void __iomem *dst,
return -EINVAL;
while (n > 0) {
- size = zpci_get_max_write_size((u64 __force) dst,
- (u64 __force) src, n,
- ZPCI_MAX_WRITE_SIZE);
+ size = zpci_get_max_io_size((u64 __force) dst,
+ (u64 __force) src, n,
+ ZPCI_MAX_WRITE_SIZE);
if (size > 8) /* main path */
rc = __pcistb_mio_inuser(dst, src, size, &status);
else
@@ -242,9 +242,9 @@ static inline int __memcpy_fromio_inuser(void __user *dst,
u8 status;
while (n > 0) {
- size = zpci_get_max_write_size((u64 __force) src,
- (u64 __force) dst, n,
- ZPCI_MAX_READ_SIZE);
+ size = zpci_get_max_io_size((u64 __force) src,
+ (u64 __force) dst, n,
+ ZPCI_MAX_READ_SIZE);
rc = __pcilg_mio_inuser(dst, src, size, &status);
if (rc)
break;
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index acb710d3d7bc..983b3b16196c 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -32,7 +32,8 @@
#define AP_RESET_INTERVAL 20 /* Reset sleep interval (20ms) */
-static int vfio_ap_mdev_reset_queues(struct ap_queue_table *qtable);
+static int vfio_ap_mdev_reset_queues(struct ap_matrix_mdev *matrix_mdev);
+static int vfio_ap_mdev_reset_qlist(struct list_head *qlist);
static struct vfio_ap_queue *vfio_ap_find_queue(int apqn);
static const struct vfio_device_ops vfio_ap_matrix_dev_ops;
static void vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q);
@@ -665,17 +666,23 @@ static bool vfio_ap_mdev_filter_cdoms(struct ap_matrix_mdev *matrix_mdev)
* device driver.
*
* @matrix_mdev: the matrix mdev whose matrix is to be filtered.
+ * @apm_filtered: a 256-bit bitmap for storing the APIDs filtered from the
+ * guest's AP configuration that are still in the host's AP
+ * configuration.
*
* Note: If an APQN referencing a queue device that is not bound to the vfio_ap
* driver, its APID will be filtered from the guest's APCB. The matrix
* structure precludes filtering an individual APQN, so its APID will be
- * filtered.
+ * filtered. Consequently, all queues associated with the adapter that
+ * are in the host's AP configuration must be reset. If queues are
+ * subsequently made available again to the guest, they should re-appear
+ * in a reset state
*
* Return: a boolean value indicating whether the KVM guest's APCB was changed
* by the filtering or not.
*/
-static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
- struct ap_matrix_mdev *matrix_mdev)
+static bool vfio_ap_mdev_filter_matrix(struct ap_matrix_mdev *matrix_mdev,
+ unsigned long *apm_filtered)
{
unsigned long apid, apqi, apqn;
DECLARE_BITMAP(prev_shadow_apm, AP_DEVICES);
@@ -685,6 +692,7 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
bitmap_copy(prev_shadow_apm, matrix_mdev->shadow_apcb.apm, AP_DEVICES);
bitmap_copy(prev_shadow_aqm, matrix_mdev->shadow_apcb.aqm, AP_DOMAINS);
vfio_ap_matrix_init(&matrix_dev->info, &matrix_mdev->shadow_apcb);
+ bitmap_clear(apm_filtered, 0, AP_DEVICES);
/*
* Copy the adapters, domains and control domains to the shadow_apcb
@@ -696,8 +704,9 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
bitmap_and(matrix_mdev->shadow_apcb.aqm, matrix_mdev->matrix.aqm,
(unsigned long *)matrix_dev->info.aqm, AP_DOMAINS);
- for_each_set_bit_inv(apid, apm, AP_DEVICES) {
- for_each_set_bit_inv(apqi, aqm, AP_DOMAINS) {
+ for_each_set_bit_inv(apid, matrix_mdev->shadow_apcb.apm, AP_DEVICES) {
+ for_each_set_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm,
+ AP_DOMAINS) {
/*
* If the APQN is not bound to the vfio_ap device
* driver, then we can't assign it to the guest's
@@ -709,8 +718,16 @@ static bool vfio_ap_mdev_filter_matrix(unsigned long *apm, unsigned long *aqm,
apqn = AP_MKQID(apid, apqi);
q = vfio_ap_mdev_get_queue(matrix_mdev, apqn);
if (!q || q->reset_status.response_code) {
- clear_bit_inv(apid,
- matrix_mdev->shadow_apcb.apm);
+ clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
+
+ /*
+ * If the adapter was previously plugged into
+ * the guest, let's let the caller know that
+ * the APID was filtered.
+ */
+ if (test_bit_inv(apid, prev_shadow_apm))
+ set_bit_inv(apid, apm_filtered);
+
break;
}
}
@@ -812,7 +829,7 @@ static void vfio_ap_mdev_remove(struct mdev_device *mdev)
mutex_lock(&matrix_dev->guests_lock);
mutex_lock(&matrix_dev->mdevs_lock);
- vfio_ap_mdev_reset_queues(&matrix_mdev->qtable);
+ vfio_ap_mdev_reset_queues(matrix_mdev);
vfio_ap_mdev_unlink_fr_queues(matrix_mdev);
list_del(&matrix_mdev->node);
mutex_unlock(&matrix_dev->mdevs_lock);
@@ -922,6 +939,47 @@ static void vfio_ap_mdev_link_adapter(struct ap_matrix_mdev *matrix_mdev,
AP_MKQID(apid, apqi));
}
+static void collect_queues_to_reset(struct ap_matrix_mdev *matrix_mdev,
+ unsigned long apid,
+ struct list_head *qlist)
+{
+ struct vfio_ap_queue *q;
+ unsigned long apqi;
+
+ for_each_set_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm, AP_DOMAINS) {
+ q = vfio_ap_mdev_get_queue(matrix_mdev, AP_MKQID(apid, apqi));
+ if (q)
+ list_add_tail(&q->reset_qnode, qlist);
+ }
+}
+
+static void reset_queues_for_apid(struct ap_matrix_mdev *matrix_mdev,
+ unsigned long apid)
+{
+ struct list_head qlist;
+
+ INIT_LIST_HEAD(&qlist);
+ collect_queues_to_reset(matrix_mdev, apid, &qlist);
+ vfio_ap_mdev_reset_qlist(&qlist);
+}
+
+static int reset_queues_for_apids(struct ap_matrix_mdev *matrix_mdev,
+ unsigned long *apm_reset)
+{
+ struct list_head qlist;
+ unsigned long apid;
+
+ if (bitmap_empty(apm_reset, AP_DEVICES))
+ return 0;
+
+ INIT_LIST_HEAD(&qlist);
+
+ for_each_set_bit_inv(apid, apm_reset, AP_DEVICES)
+ collect_queues_to_reset(matrix_mdev, apid, &qlist);
+
+ return vfio_ap_mdev_reset_qlist(&qlist);
+}
+
/**
* assign_adapter_store - parses the APID from @buf and sets the
* corresponding bit in the mediated matrix device's APM
@@ -962,7 +1020,7 @@ static ssize_t assign_adapter_store(struct device *dev,
{
int ret;
unsigned long apid;
- DECLARE_BITMAP(apm_delta, AP_DEVICES);
+ DECLARE_BITMAP(apm_filtered, AP_DEVICES);
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
mutex_lock(&ap_perms_mutex);
@@ -991,12 +1049,11 @@ static ssize_t assign_adapter_store(struct device *dev,
}
vfio_ap_mdev_link_adapter(matrix_mdev, apid);
- memset(apm_delta, 0, sizeof(apm_delta));
- set_bit_inv(apid, apm_delta);
- if (vfio_ap_mdev_filter_matrix(apm_delta,
- matrix_mdev->matrix.aqm, matrix_mdev))
+ if (vfio_ap_mdev_filter_matrix(matrix_mdev, apm_filtered)) {
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
+ reset_queues_for_apids(matrix_mdev, apm_filtered);
+ }
ret = count;
done:
@@ -1027,11 +1084,12 @@ static struct vfio_ap_queue
* adapter was assigned.
* @matrix_mdev: the matrix mediated device to which the adapter was assigned.
* @apid: the APID of the unassigned adapter.
- * @qtable: table for storing queues associated with unassigned adapter.
+ * @qlist: list for storing queues associated with unassigned adapter that
+ * need to be reset.
*/
static void vfio_ap_mdev_unlink_adapter(struct ap_matrix_mdev *matrix_mdev,
unsigned long apid,
- struct ap_queue_table *qtable)
+ struct list_head *qlist)
{
unsigned long apqi;
struct vfio_ap_queue *q;
@@ -1039,11 +1097,10 @@ static void vfio_ap_mdev_unlink_adapter(struct ap_matrix_mdev *matrix_mdev,
for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, AP_DOMAINS) {
q = vfio_ap_unlink_apqn_fr_mdev(matrix_mdev, apid, apqi);
- if (q && qtable) {
+ if (q && qlist) {
if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
- hash_add(qtable->queues, &q->mdev_qnode,
- q->apqn);
+ list_add_tail(&q->reset_qnode, qlist);
}
}
}
@@ -1051,26 +1108,23 @@ static void vfio_ap_mdev_unlink_adapter(struct ap_matrix_mdev *matrix_mdev,
static void vfio_ap_mdev_hot_unplug_adapter(struct ap_matrix_mdev *matrix_mdev,
unsigned long apid)
{
- int loop_cursor;
- struct vfio_ap_queue *q;
- struct ap_queue_table *qtable = kzalloc(sizeof(*qtable), GFP_KERNEL);
+ struct vfio_ap_queue *q, *tmpq;
+ struct list_head qlist;
- hash_init(qtable->queues);
- vfio_ap_mdev_unlink_adapter(matrix_mdev, apid, qtable);
+ INIT_LIST_HEAD(&qlist);
+ vfio_ap_mdev_unlink_adapter(matrix_mdev, apid, &qlist);
if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm)) {
clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
}
- vfio_ap_mdev_reset_queues(qtable);
+ vfio_ap_mdev_reset_qlist(&qlist);
- hash_for_each(qtable->queues, loop_cursor, q, mdev_qnode) {
+ list_for_each_entry_safe(q, tmpq, &qlist, reset_qnode) {
vfio_ap_unlink_mdev_fr_queue(q);
- hash_del(&q->mdev_qnode);
+ list_del(&q->reset_qnode);
}
-
- kfree(qtable);
}
/**
@@ -1171,7 +1225,7 @@ static ssize_t assign_domain_store(struct device *dev,
{
int ret;
unsigned long apqi;
- DECLARE_BITMAP(aqm_delta, AP_DOMAINS);
+ DECLARE_BITMAP(apm_filtered, AP_DEVICES);
struct ap_matrix_mdev *matrix_mdev = dev_get_drvdata(dev);
mutex_lock(&ap_perms_mutex);
@@ -1200,12 +1254,11 @@ static ssize_t assign_domain_store(struct device *dev,
}
vfio_ap_mdev_link_domain(matrix_mdev, apqi);
- memset(aqm_delta, 0, sizeof(aqm_delta));
- set_bit_inv(apqi, aqm_delta);
- if (vfio_ap_mdev_filter_matrix(matrix_mdev->matrix.apm, aqm_delta,
- matrix_mdev))
+ if (vfio_ap_mdev_filter_matrix(matrix_mdev, apm_filtered)) {
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
+ reset_queues_for_apids(matrix_mdev, apm_filtered);
+ }
ret = count;
done:
@@ -1218,7 +1271,7 @@ static DEVICE_ATTR_WO(assign_domain);
static void vfio_ap_mdev_unlink_domain(struct ap_matrix_mdev *matrix_mdev,
unsigned long apqi,
- struct ap_queue_table *qtable)
+ struct list_head *qlist)
{
unsigned long apid;
struct vfio_ap_queue *q;
@@ -1226,11 +1279,10 @@ static void vfio_ap_mdev_unlink_domain(struct ap_matrix_mdev *matrix_mdev,
for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, AP_DEVICES) {
q = vfio_ap_unlink_apqn_fr_mdev(matrix_mdev, apid, apqi);
- if (q && qtable) {
+ if (q && qlist) {
if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm))
- hash_add(qtable->queues, &q->mdev_qnode,
- q->apqn);
+ list_add_tail(&q->reset_qnode, qlist);
}
}
}
@@ -1238,26 +1290,23 @@ static void vfio_ap_mdev_unlink_domain(struct ap_matrix_mdev *matrix_mdev,
static void vfio_ap_mdev_hot_unplug_domain(struct ap_matrix_mdev *matrix_mdev,
unsigned long apqi)
{
- int loop_cursor;
- struct vfio_ap_queue *q;
- struct ap_queue_table *qtable = kzalloc(sizeof(*qtable), GFP_KERNEL);
+ struct vfio_ap_queue *q, *tmpq;
+ struct list_head qlist;
- hash_init(qtable->queues);
- vfio_ap_mdev_unlink_domain(matrix_mdev, apqi, qtable);
+ INIT_LIST_HEAD(&qlist);
+ vfio_ap_mdev_unlink_domain(matrix_mdev, apqi, &qlist);
if (test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm)) {
clear_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm);
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
}
- vfio_ap_mdev_reset_queues(qtable);
+ vfio_ap_mdev_reset_qlist(&qlist);
- hash_for_each(qtable->queues, loop_cursor, q, mdev_qnode) {
+ list_for_each_entry_safe(q, tmpq, &qlist, reset_qnode) {
vfio_ap_unlink_mdev_fr_queue(q);
- hash_del(&q->mdev_qnode);
+ list_del(&q->reset_qnode);
}
-
- kfree(qtable);
}
/**
@@ -1612,7 +1661,7 @@ static void vfio_ap_mdev_unset_kvm(struct ap_matrix_mdev *matrix_mdev)
get_update_locks_for_kvm(kvm);
kvm_arch_crypto_clear_masks(kvm);
- vfio_ap_mdev_reset_queues(&matrix_mdev->qtable);
+ vfio_ap_mdev_reset_queues(matrix_mdev);
kvm_put_kvm(kvm);
matrix_mdev->kvm = NULL;
@@ -1748,15 +1797,33 @@ static void vfio_ap_mdev_reset_queue(struct vfio_ap_queue *q)
}
}
-static int vfio_ap_mdev_reset_queues(struct ap_queue_table *qtable)
+static int vfio_ap_mdev_reset_queues(struct ap_matrix_mdev *matrix_mdev)
{
int ret = 0, loop_cursor;
struct vfio_ap_queue *q;
- hash_for_each(qtable->queues, loop_cursor, q, mdev_qnode)
+ hash_for_each(matrix_mdev->qtable.queues, loop_cursor, q, mdev_qnode)
vfio_ap_mdev_reset_queue(q);
- hash_for_each(qtable->queues, loop_cursor, q, mdev_qnode) {
+ hash_for_each(matrix_mdev->qtable.queues, loop_cursor, q, mdev_qnode) {
+ flush_work(&q->reset_work);
+
+ if (q->reset_status.response_code)
+ ret = -EIO;
+ }
+
+ return ret;
+}
+
+static int vfio_ap_mdev_reset_qlist(struct list_head *qlist)
+{
+ int ret = 0;
+ struct vfio_ap_queue *q;
+
+ list_for_each_entry(q, qlist, reset_qnode)
+ vfio_ap_mdev_reset_queue(q);
+
+ list_for_each_entry(q, qlist, reset_qnode) {
flush_work(&q->reset_work);
if (q->reset_status.response_code)
@@ -1942,7 +2009,7 @@ static ssize_t vfio_ap_mdev_ioctl(struct vfio_device *vdev,
ret = vfio_ap_mdev_get_device_info(arg);
break;
case VFIO_DEVICE_RESET:
- ret = vfio_ap_mdev_reset_queues(&matrix_mdev->qtable);
+ ret = vfio_ap_mdev_reset_queues(matrix_mdev);
break;
case VFIO_DEVICE_GET_IRQ_INFO:
ret = vfio_ap_get_irq_info(arg);
@@ -2088,6 +2155,7 @@ int vfio_ap_mdev_probe_queue(struct ap_device *apdev)
{
int ret;
struct vfio_ap_queue *q;
+ DECLARE_BITMAP(apm_filtered, AP_DEVICES);
struct ap_matrix_mdev *matrix_mdev;
ret = sysfs_create_group(&apdev->device.kobj, &vfio_queue_attr_group);
@@ -2109,15 +2177,28 @@ int vfio_ap_mdev_probe_queue(struct ap_device *apdev)
if (matrix_mdev) {
vfio_ap_mdev_link_queue(matrix_mdev, q);
- if (vfio_ap_mdev_filter_matrix(matrix_mdev->matrix.apm,
- matrix_mdev->matrix.aqm,
- matrix_mdev))
+ /*
+ * If we're in the process of handling the adding of adapters or
+ * domains to the host's AP configuration, then let the
+ * vfio_ap device driver's on_scan_complete callback filter the
+ * matrix and update the guest's AP configuration after all of
+ * the new queue devices are probed.
+ */
+ if (!bitmap_empty(matrix_mdev->apm_add, AP_DEVICES) ||
+ !bitmap_empty(matrix_mdev->aqm_add, AP_DOMAINS))
+ goto done;
+
+ if (vfio_ap_mdev_filter_matrix(matrix_mdev, apm_filtered)) {
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
+ reset_queues_for_apids(matrix_mdev, apm_filtered);
+ }
}
+
+done:
dev_set_drvdata(&apdev->device, q);
release_update_locks_for_mdev(matrix_mdev);
- return 0;
+ return ret;
err_remove_group:
sysfs_remove_group(&apdev->device.kobj, &vfio_queue_attr_group);
@@ -2134,26 +2215,40 @@ void vfio_ap_mdev_remove_queue(struct ap_device *apdev)
q = dev_get_drvdata(&apdev->device);
get_update_locks_for_queue(q);
matrix_mdev = q->matrix_mdev;
+ apid = AP_QID_CARD(q->apqn);
+ apqi = AP_QID_QUEUE(q->apqn);
if (matrix_mdev) {
- vfio_ap_unlink_queue_fr_mdev(q);
-
- apid = AP_QID_CARD(q->apqn);
- apqi = AP_QID_QUEUE(q->apqn);
-
- /*
- * If the queue is assigned to the guest's APCB, then remove
- * the adapter's APID from the APCB and hot it into the guest.
- */
+ /* If the queue is assigned to the guest's AP configuration */
if (test_bit_inv(apid, matrix_mdev->shadow_apcb.apm) &&
test_bit_inv(apqi, matrix_mdev->shadow_apcb.aqm)) {
+ /*
+ * Since the queues are defined via a matrix of adapters
+ * and domains, it is not possible to hot unplug a
+ * single queue; so, let's unplug the adapter.
+ */
clear_bit_inv(apid, matrix_mdev->shadow_apcb.apm);
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
+ reset_queues_for_apid(matrix_mdev, apid);
+ goto done;
}
}
- vfio_ap_mdev_reset_queue(q);
- flush_work(&q->reset_work);
+ /*
+ * If the queue is not in the host's AP configuration, then resetting
+ * it will fail with response code 01, (APQN not valid); so, let's make
+ * sure it is in the host's config.
+ */
+ if (test_bit_inv(apid, (unsigned long *)matrix_dev->info.apm) &&
+ test_bit_inv(apqi, (unsigned long *)matrix_dev->info.aqm)) {
+ vfio_ap_mdev_reset_queue(q);
+ flush_work(&q->reset_work);
+ }
+
+done:
+ if (matrix_mdev)
+ vfio_ap_unlink_queue_fr_mdev(q);
+
dev_set_drvdata(&apdev->device, NULL);
kfree(q);
release_update_locks_for_mdev(matrix_mdev);
@@ -2461,39 +2556,30 @@ void vfio_ap_on_cfg_changed(struct ap_config_info *cur_cfg_info,
static void vfio_ap_mdev_hot_plug_cfg(struct ap_matrix_mdev *matrix_mdev)
{
- bool do_hotplug = false;
- int filter_domains = 0;
- int filter_adapters = 0;
- DECLARE_BITMAP(apm, AP_DEVICES);
- DECLARE_BITMAP(aqm, AP_DOMAINS);
+ DECLARE_BITMAP(apm_filtered, AP_DEVICES);
+ bool filter_domains, filter_adapters, filter_cdoms, do_hotplug = false;
mutex_lock(&matrix_mdev->kvm->lock);
mutex_lock(&matrix_dev->mdevs_lock);
- filter_adapters = bitmap_and(apm, matrix_mdev->matrix.apm,
- matrix_mdev->apm_add, AP_DEVICES);
- filter_domains = bitmap_and(aqm, matrix_mdev->matrix.aqm,
- matrix_mdev->aqm_add, AP_DOMAINS);
-
- if (filter_adapters && filter_domains)
- do_hotplug |= vfio_ap_mdev_filter_matrix(apm, aqm, matrix_mdev);
- else if (filter_adapters)
- do_hotplug |=
- vfio_ap_mdev_filter_matrix(apm,
- matrix_mdev->shadow_apcb.aqm,
- matrix_mdev);
- else
- do_hotplug |=
- vfio_ap_mdev_filter_matrix(matrix_mdev->shadow_apcb.apm,
- aqm, matrix_mdev);
+ filter_adapters = bitmap_intersects(matrix_mdev->matrix.apm,
+ matrix_mdev->apm_add, AP_DEVICES);
+ filter_domains = bitmap_intersects(matrix_mdev->matrix.aqm,
+ matrix_mdev->aqm_add, AP_DOMAINS);
+ filter_cdoms = bitmap_intersects(matrix_mdev->matrix.adm,
+ matrix_mdev->adm_add, AP_DOMAINS);
- if (bitmap_intersects(matrix_mdev->matrix.adm, matrix_mdev->adm_add,
- AP_DOMAINS))
+ if (filter_adapters || filter_domains)
+ do_hotplug = vfio_ap_mdev_filter_matrix(matrix_mdev, apm_filtered);
+
+ if (filter_cdoms)
do_hotplug |= vfio_ap_mdev_filter_cdoms(matrix_mdev);
if (do_hotplug)
vfio_ap_mdev_update_guest_apcb(matrix_mdev);
+ reset_queues_for_apids(matrix_mdev, apm_filtered);
+
mutex_unlock(&matrix_dev->mdevs_lock);
mutex_unlock(&matrix_mdev->kvm->lock);
}
diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h
index 88aff8b81f2f..98d37aa27044 100644
--- a/drivers/s390/crypto/vfio_ap_private.h
+++ b/drivers/s390/crypto/vfio_ap_private.h
@@ -133,6 +133,8 @@ struct ap_matrix_mdev {
* @apqn: the APQN of the AP queue device
* @saved_isc: the guest ISC registered with the GIB interface
* @mdev_qnode: allows the vfio_ap_queue struct to be added to a hashtable
+ * @reset_qnode: allows the vfio_ap_queue struct to be added to a list of queues
+ * that need to be reset
* @reset_status: the status from the last reset of the queue
* @reset_work: work to wait for queue reset to complete
*/
@@ -143,6 +145,7 @@ struct vfio_ap_queue {
#define VFIO_AP_ISC_INVALID 0xff
unsigned char saved_isc;
struct hlist_node mdev_qnode;
+ struct list_head reset_qnode;
struct ap_queue_status reset_status;
struct work_struct reset_work;
};
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-03 13:16:41 +0300