summaryrefslogtreecommitdiff
path: root/arch/xtensa/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/xtensa/kernel')
-rw-r--r--arch/xtensa/kernel/coprocessor.S8
-rw-r--r--arch/xtensa/kernel/entry.S53
-rw-r--r--arch/xtensa/kernel/head.S2
-rw-r--r--arch/xtensa/kernel/mcount.S11
-rw-r--r--arch/xtensa/kernel/pci-dma.c12
-rw-r--r--arch/xtensa/kernel/pci.c124
-rw-r--r--arch/xtensa/kernel/platform.c2
-rw-r--r--arch/xtensa/kernel/setup.c14
-rw-r--r--arch/xtensa/kernel/signal.c28
-rw-r--r--arch/xtensa/kernel/stacktrace.c5
-rw-r--r--arch/xtensa/kernel/syscalls/syscall.tbl2
-rw-r--r--arch/xtensa/kernel/traps.c12
12 files changed, 98 insertions, 175 deletions
diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S
index 92bf24a9da92..80828b95a51f 100644
--- a/arch/xtensa/kernel/coprocessor.S
+++ b/arch/xtensa/kernel/coprocessor.S
@@ -14,6 +14,7 @@
#include <linux/linkage.h>
#include <asm/asm-offsets.h>
+#include <asm/asmmacro.h>
#include <asm/processor.h>
#include <asm/coprocessor.h>
#include <asm/thread_info.h>
@@ -121,7 +122,9 @@
ENTRY(coprocessor_flush)
- entry a1, 32
+ /* reserve 4 bytes on stack to save a0 */
+ abi_entry(4)
+
s32i a0, a1, 0
movi a0, .Lsave_cp_regs_jump_table
addx8 a3, a3, a0
@@ -131,7 +134,8 @@ ENTRY(coprocessor_flush)
beqz a3, 1f
callx0 a3
1: l32i a0, a1, 0
- retw
+
+ abi_ret(4)
ENDPROC(coprocessor_flush)
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index e54af8b7e0f8..9e3676879168 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -414,7 +414,7 @@ common_exception:
movi a3, LOCKLEVEL
.Lexception:
- movi a0, 1 << PS_WOE_BIT
+ movi a0, PS_WOE_MASK
or a3, a3, a0
#else
addi a2, a2, -EXCCAUSE_LEVEL1_INTERRUPT
@@ -422,7 +422,7 @@ common_exception:
extui a3, a3, PS_INTLEVEL_SHIFT, PS_INTLEVEL_WIDTH
# a3 = PS.INTLEVEL
moveqz a3, a0, a2 # a3 = LOCKLEVEL iff interrupt
- movi a2, 1 << PS_WOE_BIT
+ movi a2, PS_WOE_MASK
or a3, a3, a2
rsr a2, exccause
#endif
@@ -922,7 +922,7 @@ ENTRY(unrecoverable_exception)
wsr a1, windowbase
rsync
- movi a1, (1 << PS_WOE_BIT) | LOCKLEVEL
+ movi a1, PS_WOE_MASK | LOCKLEVEL
wsr a1, ps
rsync
@@ -1003,7 +1003,41 @@ ENTRY(fast_alloca)
4: j _WindowUnderflow4
ENDPROC(fast_alloca)
+#ifdef CONFIG_USER_ABI_CALL0_PROBE
/*
+ * fast illegal instruction handler.
+ *
+ * This is used to fix up user PS.WOE on the exception caused
+ * by the first opcode related to register window. If PS.WOE is
+ * already set it goes directly to the common user exception handler.
+ *
+ * Entry condition:
+ *
+ * a0: trashed, original value saved on stack (PT_AREG0)
+ * a1: a1
+ * a2: new stack pointer, original in DEPC
+ * a3: a3
+ * depc: a2, original value saved on stack (PT_DEPC)
+ * excsave_1: dispatch table
+ */
+
+ENTRY(fast_illegal_instruction_user)
+
+ rsr a0, ps
+ bbsi.l a0, PS_WOE_BIT, user_exception
+ s32i a3, a2, PT_AREG3
+ movi a3, PS_WOE_MASK
+ or a0, a0, a3
+ wsr a0, ps
+ l32i a3, a2, PT_AREG3
+ l32i a0, a2, PT_AREG0
+ rsr a2, depc
+ rfe
+
+ENDPROC(fast_illegal_instruction_user)
+#endif
+
+ /*
* fast system calls.
*
* WARNING: The kernel doesn't save the entire user context before
@@ -1359,7 +1393,7 @@ ENTRY(fast_syscall_spill_registers)
rsr a3, excsave1
l32i a1, a3, EXC_TABLE_KSTK
- movi a4, (1 << PS_WOE_BIT) | LOCKLEVEL
+ movi a4, PS_WOE_MASK | LOCKLEVEL
wsr a4, ps
rsync
@@ -1842,7 +1876,8 @@ ENDPROC(fast_store_prohibited)
ENTRY(system_call)
- entry a1, 32
+ /* reserve 4 bytes on stack for function parameter */
+ abi_entry(4)
/* regs->syscall = regs->areg[2] */
@@ -1892,7 +1927,7 @@ ENTRY(system_call)
s32i a6, a2, PT_AREG2
bnez a3, 1f
- retw
+ abi_ret(4)
1:
l32i a4, a1, 4
@@ -1901,7 +1936,7 @@ ENTRY(system_call)
mov a6, a2
call4 do_syscall_trace_leave
s32i a3, a2, PT_SYSCALL
- retw
+ abi_ret(4)
ENDPROC(system_call)
@@ -1952,7 +1987,7 @@ ENDPROC(system_call)
ENTRY(_switch_to)
- entry a1, 48
+ abi_entry(XTENSA_SPILL_STACK_RESERVE)
mov a11, a3 # and 'next' (a3)
@@ -2013,7 +2048,7 @@ ENTRY(_switch_to)
wsr a14, ps
rsync
- retw
+ abi_ret(XTENSA_SPILL_STACK_RESERVE)
ENDPROC(_switch_to)
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index 7f009719304e..4ae998b5a348 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -193,7 +193,7 @@ ENTRY(_startup)
movi a1, start_info
l32i a1, a1, 0
- movi a2, (1 << PS_WOE_BIT) | LOCKLEVEL
+ movi a2, PS_WOE_MASK | LOCKLEVEL
# WOE=1, INTLEVEL=LOCKLEVEL, UM=0
wsr a2, ps # (enable reg-windows; progmode stack)
rsync
diff --git a/arch/xtensa/kernel/mcount.S b/arch/xtensa/kernel/mcount.S
index 0eeda2e4a25e..5e4619f52858 100644
--- a/arch/xtensa/kernel/mcount.S
+++ b/arch/xtensa/kernel/mcount.S
@@ -11,6 +11,7 @@
*/
#include <linux/linkage.h>
+#include <asm/asmmacro.h>
#include <asm/ftrace.h>
/*
@@ -21,13 +22,13 @@
ENTRY(_mcount)
- entry a1, 16
+ abi_entry_default
movi a4, ftrace_trace_function
l32i a4, a4, 0
movi a3, ftrace_stub
bne a3, a4, 1f
- retw
+ abi_ret_default
1: xor a7, a2, a1
movi a3, 0x3fffffff
@@ -40,11 +41,11 @@ ENTRY(_mcount)
addi a6, a6, -MCOUNT_INSN_SIZE
callx4 a4
- retw
+ abi_ret_default
ENDPROC(_mcount)
ENTRY(ftrace_stub)
- entry a1, 16
- retw
+ abi_entry_default
+ abi_ret_default
ENDPROC(ftrace_stub)
diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c
index a87f8a308cc1..154979d62b73 100644
--- a/arch/xtensa/kernel/pci-dma.c
+++ b/arch/xtensa/kernel/pci-dma.c
@@ -163,15 +163,11 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
*handle = phys_to_dma(dev, page_to_phys(page));
- if (attrs & DMA_ATTR_NO_KERNEL_MAPPING) {
- return page;
- }
-
#ifdef CONFIG_MMU
if (PageHighMem(page)) {
void *p;
- p = dma_common_contiguous_remap(page, size, VM_MAP,
+ p = dma_common_contiguous_remap(page, size,
pgprot_noncached(PAGE_KERNEL),
__builtin_return_address(0));
if (!p) {
@@ -192,13 +188,11 @@ void arch_dma_free(struct device *dev, size_t size, void *vaddr,
unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
struct page *page;
- if (attrs & DMA_ATTR_NO_KERNEL_MAPPING) {
- page = vaddr;
- } else if (platform_vaddr_uncached(vaddr)) {
+ if (platform_vaddr_uncached(vaddr)) {
page = virt_to_page(platform_vaddr_to_cached(vaddr));
} else {
#ifdef CONFIG_MMU
- dma_common_free_remap(vaddr, size, VM_MAP);
+ dma_common_free_remap(vaddr, size);
#endif
page = pfn_to_page(PHYS_PFN(dma_to_phys(dev, dma_handle)));
}
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 8b823f94e568..3f32e275997a 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -24,23 +24,6 @@
#include <asm/pci-bridge.h>
#include <asm/platform.h>
-/* PCI Controller */
-
-
-/*
- * pcibios_alloc_controller
- * pcibios_enable_device
- * pcibios_fixups
- * pcibios_align_resource
- * pcibios_fixup_bus
- * pci_bus_add_device
- */
-
-static struct pci_controller *pci_ctrl_head;
-static struct pci_controller **pci_ctrl_tail = &pci_ctrl_head;
-
-static int pci_bus_count;
-
/*
* We need to avoid collisions with `mirrored' VGA ports
* and other strange ISA hardware, so we always want the
@@ -75,81 +58,6 @@ pcibios_align_resource(void *data, const struct resource *res,
return start;
}
-static void __init pci_controller_apertures(struct pci_controller *pci_ctrl,
- struct list_head *resources)
-{
- struct resource *res;
- unsigned long io_offset;
- int i;
-
- io_offset = (unsigned long)pci_ctrl->io_space.base;
- res = &pci_ctrl->io_resource;
- if (!res->flags) {
- if (io_offset)
- pr_err("I/O resource not set for host bridge %d\n",
- pci_ctrl->index);
- res->start = 0;
- res->end = IO_SPACE_LIMIT;
- res->flags = IORESOURCE_IO;
- }
- res->start += io_offset;
- res->end += io_offset;
- pci_add_resource_offset(resources, res, io_offset);
-
- for (i = 0; i < 3; i++) {
- res = &pci_ctrl->mem_resources[i];
- if (!res->flags) {
- if (i > 0)
- continue;
- pr_err("Memory resource not set for host bridge %d\n",
- pci_ctrl->index);
- res->start = 0;
- res->end = ~0U;
- res->flags = IORESOURCE_MEM;
- }
- pci_add_resource(resources, res);
- }
-}
-
-static int __init pcibios_init(void)
-{
- struct pci_controller *pci_ctrl;
- struct list_head resources;
- struct pci_bus *bus;
- int next_busno = 0, ret;
-
- pr_info("PCI: Probing PCI hardware\n");
-
- /* Scan all of the recorded PCI controllers. */
- for (pci_ctrl = pci_ctrl_head; pci_ctrl; pci_ctrl = pci_ctrl->next) {
- pci_ctrl->last_busno = 0xff;
- INIT_LIST_HEAD(&resources);
- pci_controller_apertures(pci_ctrl, &resources);
- bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno,
- pci_ctrl->ops, pci_ctrl, &resources);
- if (!bus)
- continue;
-
- pci_ctrl->bus = bus;
- pci_ctrl->last_busno = bus->busn_res.end;
- if (next_busno <= pci_ctrl->last_busno)
- next_busno = pci_ctrl->last_busno+1;
- }
- pci_bus_count = next_busno;
- ret = platform_pcibios_fixup();
- if (ret)
- return ret;
-
- for (pci_ctrl = pci_ctrl_head; pci_ctrl; pci_ctrl = pci_ctrl->next) {
- if (pci_ctrl->bus)
- pci_bus_add_devices(pci_ctrl->bus);
- }
-
- return 0;
-}
-
-subsys_initcall(pcibios_init);
-
void pcibios_fixup_bus(struct pci_bus *bus)
{
if (bus->parent) {
@@ -158,38 +66,6 @@ void pcibios_fixup_bus(struct pci_bus *bus)
}
}
-void pcibios_set_master(struct pci_dev *dev)
-{
- /* No special bus mastering setup handling */
-}
-
-int pcibios_enable_device(struct pci_dev *dev, int mask)
-{
- u16 cmd, old_cmd;
- int idx;
- struct resource *r;
-
- pci_read_config_word(dev, PCI_COMMAND, &cmd);
- old_cmd = cmd;
- for (idx=0; idx<6; idx++) {
- r = &dev->resource[idx];
- if (!r->start && r->end) {
- pci_err(dev, "can't enable device: resource collisions\n");
- return -EINVAL;
- }
- if (r->flags & IORESOURCE_IO)
- cmd |= PCI_COMMAND_IO;
- if (r->flags & IORESOURCE_MEM)
- cmd |= PCI_COMMAND_MEMORY;
- }
- if (cmd != old_cmd) {
- pci_info(dev, "enabling device (%04x -> %04x)\n", old_cmd, cmd);
- pci_write_config_word(dev, PCI_COMMAND, cmd);
- }
-
- return 0;
-}
-
/*
* Platform support for /proc/bus/pci/X/Y mmap()s.
* -- paulus.
diff --git a/arch/xtensa/kernel/platform.c b/arch/xtensa/kernel/platform.c
index 1cf008284dd2..a95ba05b0abe 100644
--- a/arch/xtensa/kernel/platform.c
+++ b/arch/xtensa/kernel/platform.c
@@ -34,8 +34,6 @@ _F(void, halt, (void), { while(1); });
_F(void, power_off, (void), { while(1); });
_F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); });
_F(void, heartbeat, (void), { });
-_F(int, pcibios_fixup, (void), { return 0; });
-_F(void, pcibios_init, (void), { });
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
_F(void, calibrate_ccount, (void),
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 176cb46bcf12..e0e1e1892b86 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -61,7 +61,6 @@ struct screen_info screen_info = {
#ifdef CONFIG_BLK_DEV_INITRD
extern unsigned long initrd_start;
extern unsigned long initrd_end;
-int initrd_is_mapped = 0;
extern int initrd_below_start_ok;
#endif
@@ -332,13 +331,11 @@ void __init setup_arch(char **cmdline_p)
/* Reserve some memory regions */
#ifdef CONFIG_BLK_DEV_INITRD
- if (initrd_start < initrd_end) {
- initrd_is_mapped = mem_reserve(__pa(initrd_start),
- __pa(initrd_end)) == 0;
+ if (initrd_start < initrd_end &&
+ !mem_reserve(__pa(initrd_start), __pa(initrd_end)))
initrd_below_start_ok = 1;
- } else {
+ else
initrd_start = 0;
- }
#endif
mem_reserve(__pa(_stext), __pa(_end));
@@ -405,10 +402,6 @@ void __init setup_arch(char **cmdline_p)
conswitchp = &dummy_con;
# endif
#endif
-
-#ifdef CONFIG_PCI
- platform_pcibios_init();
-#endif
}
static DEFINE_PER_CPU(struct cpu, cpu_data);
@@ -515,6 +508,7 @@ void cpu_reset(void)
"add %2, %2, %7\n\t"
"addi %0, %0, -1\n\t"
"bnez %0, 1b\n\t"
+ "isync\n\t"
/* Jump to identity mapping */
"jx %3\n"
"2:\n\t"
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index dc22a238ed9c..dae83cddd6ca 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -270,7 +270,7 @@ asmlinkage long xtensa_rt_sigreturn(long a0, long a1, long a2, long a3,
return ret;
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
return 0;
}
@@ -335,7 +335,8 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set,
{
struct rt_sigframe *frame;
int err = 0, sig = ksig->sig;
- unsigned long sp, ra, tp;
+ unsigned long sp, ra, tp, ps;
+ unsigned int base;
sp = regs->areg[1];
@@ -385,17 +386,26 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set,
/* Set up registers for signal handler; preserve the threadptr */
tp = regs->threadptr;
+ ps = regs->ps;
start_thread(regs, (unsigned long) ksig->ka.sa.sa_handler,
(unsigned long) frame);
- /* Set up a stack frame for a call4
- * Note: PS.CALLINC is set to one by start_thread
- */
- regs->areg[4] = (((unsigned long) ra) & 0x3fffffff) | 0x40000000;
- regs->areg[6] = (unsigned long) sig;
- regs->areg[7] = (unsigned long) &frame->info;
- regs->areg[8] = (unsigned long) &frame->uc;
+ /* Set up a stack frame for a call4 if userspace uses windowed ABI */
+ if (ps & PS_WOE_MASK) {
+ base = 4;
+ regs->areg[base] =
+ (((unsigned long) ra) & 0x3fffffff) | 0x40000000;
+ ps = (ps & ~(PS_CALLINC_MASK | PS_OWB_MASK)) |
+ (1 << PS_CALLINC_SHIFT);
+ } else {
+ base = 0;
+ regs->areg[base] = (unsigned long) ra;
+ }
+ regs->areg[base + 2] = (unsigned long) sig;
+ regs->areg[base + 3] = (unsigned long) &frame->info;
+ regs->areg[base + 4] = (unsigned long) &frame->uc;
regs->threadptr = tp;
+ regs->ps = ps;
pr_debug("SIG rt deliver (%s:%d): signal=%d sp=%p pc=%08lx\n",
current->comm, current->pid, sig, frame, regs->pc);
diff --git a/arch/xtensa/kernel/stacktrace.c b/arch/xtensa/kernel/stacktrace.c
index b9f82510c650..c822abb93d20 100644
--- a/arch/xtensa/kernel/stacktrace.c
+++ b/arch/xtensa/kernel/stacktrace.c
@@ -44,6 +44,11 @@ void xtensa_backtrace_user(struct pt_regs *regs, unsigned int depth,
if (pc == 0 || pc >= TASK_SIZE || ufn(&frame, data))
return;
+ if (IS_ENABLED(CONFIG_USER_ABI_CALL0_ONLY) ||
+ (IS_ENABLED(CONFIG_USER_ABI_CALL0_PROBE) &&
+ !(regs->ps & PS_WOE_MASK)))
+ return;
+
/* Two steps:
*
* 1. Look through the register window for the
diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
index 5fa0ee1c8e00..25f4de729a6d 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -404,3 +404,5 @@
431 common fsconfig sys_fsconfig
432 common fsmount sys_fsmount
433 common fspick sys_fspick
+434 common pidfd_open sys_pidfd_open
+435 common clone3 sys_clone3
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c
index 454d53096bc9..4a6c495ce9b6 100644
--- a/arch/xtensa/kernel/traps.c
+++ b/arch/xtensa/kernel/traps.c
@@ -51,6 +51,7 @@
extern void kernel_exception(void);
extern void user_exception(void);
+extern void fast_illegal_instruction_user(void);
extern void fast_syscall_user(void);
extern void fast_alloca(void);
extern void fast_unaligned(void);
@@ -87,6 +88,9 @@ typedef struct {
static dispatch_init_table_t __initdata dispatch_init_table[] = {
+#ifdef CONFIG_USER_ABI_CALL0_PROBE
+{ EXCCAUSE_ILLEGAL_INSTRUCTION, USER, fast_illegal_instruction_user },
+#endif
{ EXCCAUSE_ILLEGAL_INSTRUCTION, 0, do_illegal_instruction},
{ EXCCAUSE_SYSTEM_CALL, USER, fast_syscall_user },
{ EXCCAUSE_SYSTEM_CALL, 0, system_call },
@@ -184,7 +188,7 @@ void do_unhandled(struct pt_regs *regs, unsigned long exccause)
"\tEXCCAUSE is %ld\n",
current->comm, task_pid_nr(current), regs->pc,
exccause);
- force_sig(SIGILL, current);
+ force_sig(SIGILL);
}
/*
@@ -306,7 +310,7 @@ do_illegal_instruction(struct pt_regs *regs)
pr_info_ratelimited("Illegal Instruction in '%s' (pid = %d, pc = %#010lx)\n",
current->comm, task_pid_nr(current), regs->pc);
- force_sig(SIGILL, current);
+ force_sig(SIGILL);
}
@@ -330,7 +334,7 @@ do_unaligned_user (struct pt_regs *regs)
"(pid = %d, pc = %#010lx)\n",
regs->excvaddr, current->comm,
task_pid_nr(current), regs->pc);
- force_sig_fault(SIGBUS, BUS_ADRALN, (void *) regs->excvaddr, current);
+ force_sig_fault(SIGBUS, BUS_ADRALN, (void *) regs->excvaddr);
}
#endif
@@ -354,7 +358,7 @@ do_debug(struct pt_regs *regs)
/* If in user mode, send SIGTRAP signal to current process */
- force_sig(SIGTRAP, current);
+ force_sig(SIGTRAP);
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-04 01:32:28 +0300