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-rw-r--r--arch/xtensa/Kconfig3
-rw-r--r--arch/xtensa/include/asm/processor.h6
-rw-r--r--arch/xtensa/kernel/asm-offsets.c16
-rw-r--r--arch/xtensa/kernel/head.S7
-rw-r--r--arch/xtensa/kernel/pci-dma.c2
-rw-r--r--arch/xtensa/kernel/process.c5
-rw-r--r--arch/xtensa/kernel/ptrace.c42
-rw-r--r--arch/xtensa/mm/kasan_init.c18
8 files changed, 73 insertions, 26 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index d29b7365da8d..36338e7564a3 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -1,7 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
config XTENSA
def_bool y
- select ARCH_HAS_SG_CHAIN
select ARCH_HAS_SYNC_DMA_FOR_CPU
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select ARCH_NO_COHERENT_DMA_MMAP if !MMU
@@ -10,7 +9,7 @@ config XTENSA
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
select COMMON_CLK
- select DMA_DIRECT_OPS
+ select DMA_REMAP if MMU
select GENERIC_ATOMIC64
select GENERIC_CLOCKEVENTS
select GENERIC_IRQ_SHOW
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index be9bfd9aa865..34a23016dd14 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -23,7 +23,11 @@
# error Linux requires the Xtensa Windowed Registers Option.
#endif
-#define ARCH_SLAB_MINALIGN XCHAL_DATA_WIDTH
+/* Xtensa ABI requires stack alignment to be at least 16 */
+
+#define STACK_ALIGN (XCHAL_DATA_WIDTH > 16 ? XCHAL_DATA_WIDTH : 16)
+
+#define ARCH_SLAB_MINALIGN STACK_ALIGN
/*
* User space process size: 1 GB.
diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
index 67904f55f188..120dd746a147 100644
--- a/arch/xtensa/kernel/asm-offsets.c
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -94,14 +94,14 @@ int main(void)
DEFINE(THREAD_SP, offsetof (struct task_struct, thread.sp));
DEFINE(THREAD_CPENABLE, offsetof (struct thread_info, cpenable));
#if XTENSA_HAVE_COPROCESSORS
- DEFINE(THREAD_XTREGS_CP0, offsetof (struct thread_info, xtregs_cp));
- DEFINE(THREAD_XTREGS_CP1, offsetof (struct thread_info, xtregs_cp));
- DEFINE(THREAD_XTREGS_CP2, offsetof (struct thread_info, xtregs_cp));
- DEFINE(THREAD_XTREGS_CP3, offsetof (struct thread_info, xtregs_cp));
- DEFINE(THREAD_XTREGS_CP4, offsetof (struct thread_info, xtregs_cp));
- DEFINE(THREAD_XTREGS_CP5, offsetof (struct thread_info, xtregs_cp));
- DEFINE(THREAD_XTREGS_CP6, offsetof (struct thread_info, xtregs_cp));
- DEFINE(THREAD_XTREGS_CP7, offsetof (struct thread_info, xtregs_cp));
+ DEFINE(THREAD_XTREGS_CP0, offsetof(struct thread_info, xtregs_cp.cp0));
+ DEFINE(THREAD_XTREGS_CP1, offsetof(struct thread_info, xtregs_cp.cp1));
+ DEFINE(THREAD_XTREGS_CP2, offsetof(struct thread_info, xtregs_cp.cp2));
+ DEFINE(THREAD_XTREGS_CP3, offsetof(struct thread_info, xtregs_cp.cp3));
+ DEFINE(THREAD_XTREGS_CP4, offsetof(struct thread_info, xtregs_cp.cp4));
+ DEFINE(THREAD_XTREGS_CP5, offsetof(struct thread_info, xtregs_cp.cp5));
+ DEFINE(THREAD_XTREGS_CP6, offsetof(struct thread_info, xtregs_cp.cp6));
+ DEFINE(THREAD_XTREGS_CP7, offsetof(struct thread_info, xtregs_cp.cp7));
#endif
DEFINE(THREAD_XTREGS_USER, offsetof (struct thread_info, xtregs_user));
DEFINE(XTREGS_USER_SIZE, sizeof(xtregs_user_t));
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index 2f76118ecf62..9053a5622d2c 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -88,9 +88,12 @@ _SetupMMU:
initialize_mmu
#if defined(CONFIG_MMU) && XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
rsr a2, excsave1
- movi a3, 0x08000000
+ movi a3, XCHAL_KSEG_PADDR
+ bltu a2, a3, 1f
+ sub a2, a2, a3
+ movi a3, XCHAL_KSEG_SIZE
bgeu a2, a3, 1f
- movi a3, 0xd0000000
+ movi a3, XCHAL_KSEG_CACHED_VADDR
add a2, a2, a3
wsr a2, excsave1
1:
diff --git a/arch/xtensa/kernel/pci-dma.c b/arch/xtensa/kernel/pci-dma.c
index 1fc138b6bc0a..9171bff76fc4 100644
--- a/arch/xtensa/kernel/pci-dma.c
+++ b/arch/xtensa/kernel/pci-dma.c
@@ -160,7 +160,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
flag & __GFP_NOWARN);
if (!page)
- page = alloc_pages(flag, get_order(size));
+ page = alloc_pages(flag | __GFP_ZERO, get_order(size));
if (!page)
return NULL;
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 483dcfb6e681..4bb68133a72a 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -94,18 +94,21 @@ void coprocessor_release_all(struct thread_info *ti)
void coprocessor_flush_all(struct thread_info *ti)
{
- unsigned long cpenable;
+ unsigned long cpenable, old_cpenable;
int i;
preempt_disable();
+ RSR_CPENABLE(old_cpenable);
cpenable = ti->cpenable;
+ WSR_CPENABLE(cpenable);
for (i = 0; i < XCHAL_CP_MAX; i++) {
if ((cpenable & 1) != 0 && coprocessor_owner[i] == ti)
coprocessor_flush(ti, i);
cpenable >>= 1;
}
+ WSR_CPENABLE(old_cpenable);
preempt_enable();
}
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
index c0845cb1cbb9..d9541be0605a 100644
--- a/arch/xtensa/kernel/ptrace.c
+++ b/arch/xtensa/kernel/ptrace.c
@@ -127,12 +127,37 @@ static int ptrace_setregs(struct task_struct *child, void __user *uregs)
}
+#if XTENSA_HAVE_COPROCESSORS
+#define CP_OFFSETS(cp) \
+ { \
+ .elf_xtregs_offset = offsetof(elf_xtregs_t, cp), \
+ .ti_offset = offsetof(struct thread_info, xtregs_cp.cp), \
+ .sz = sizeof(xtregs_ ## cp ## _t), \
+ }
+
+static const struct {
+ size_t elf_xtregs_offset;
+ size_t ti_offset;
+ size_t sz;
+} cp_offsets[] = {
+ CP_OFFSETS(cp0),
+ CP_OFFSETS(cp1),
+ CP_OFFSETS(cp2),
+ CP_OFFSETS(cp3),
+ CP_OFFSETS(cp4),
+ CP_OFFSETS(cp5),
+ CP_OFFSETS(cp6),
+ CP_OFFSETS(cp7),
+};
+#endif
+
static int ptrace_getxregs(struct task_struct *child, void __user *uregs)
{
struct pt_regs *regs = task_pt_regs(child);
struct thread_info *ti = task_thread_info(child);
elf_xtregs_t __user *xtregs = uregs;
int ret = 0;
+ int i __maybe_unused;
if (!access_ok(VERIFY_WRITE, uregs, sizeof(elf_xtregs_t)))
return -EIO;
@@ -140,8 +165,13 @@ static int ptrace_getxregs(struct task_struct *child, void __user *uregs)
#if XTENSA_HAVE_COPROCESSORS
/* Flush all coprocessor registers to memory. */
coprocessor_flush_all(ti);
- ret |= __copy_to_user(&xtregs->cp0, &ti->xtregs_cp,
- sizeof(xtregs_coprocessor_t));
+
+ for (i = 0; i < ARRAY_SIZE(cp_offsets); ++i)
+ ret |= __copy_to_user((char __user *)xtregs +
+ cp_offsets[i].elf_xtregs_offset,
+ (const char *)ti +
+ cp_offsets[i].ti_offset,
+ cp_offsets[i].sz);
#endif
ret |= __copy_to_user(&xtregs->opt, &regs->xtregs_opt,
sizeof(xtregs->opt));
@@ -157,6 +187,7 @@ static int ptrace_setxregs(struct task_struct *child, void __user *uregs)
struct pt_regs *regs = task_pt_regs(child);
elf_xtregs_t *xtregs = uregs;
int ret = 0;
+ int i __maybe_unused;
if (!access_ok(VERIFY_READ, uregs, sizeof(elf_xtregs_t)))
return -EFAULT;
@@ -166,8 +197,11 @@ static int ptrace_setxregs(struct task_struct *child, void __user *uregs)
coprocessor_flush_all(ti);
coprocessor_release_all(ti);
- ret |= __copy_from_user(&ti->xtregs_cp, &xtregs->cp0,
- sizeof(xtregs_coprocessor_t));
+ for (i = 0; i < ARRAY_SIZE(cp_offsets); ++i)
+ ret |= __copy_from_user((char *)ti + cp_offsets[i].ti_offset,
+ (const char __user *)xtregs +
+ cp_offsets[i].elf_xtregs_offset,
+ cp_offsets[i].sz);
#endif
ret |= __copy_from_user(&regs->xtregs_opt, &xtregs->opt,
sizeof(xtregs->opt));
diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c
index 6b95ca43aec0..1734cda6bc4a 100644
--- a/arch/xtensa/mm/kasan_init.c
+++ b/arch/xtensa/mm/kasan_init.c
@@ -24,12 +24,13 @@ void __init kasan_early_init(void)
int i;
for (i = 0; i < PTRS_PER_PTE; ++i)
- set_pte(kasan_zero_pte + i,
- mk_pte(virt_to_page(kasan_zero_page), PAGE_KERNEL));
+ set_pte(kasan_early_shadow_pte + i,
+ mk_pte(virt_to_page(kasan_early_shadow_page),
+ PAGE_KERNEL));
for (vaddr = 0; vaddr < KASAN_SHADOW_SIZE; vaddr += PMD_SIZE, ++pmd) {
BUG_ON(!pmd_none(*pmd));
- set_pmd(pmd, __pmd((unsigned long)kasan_zero_pte));
+ set_pmd(pmd, __pmd((unsigned long)kasan_early_shadow_pte));
}
early_trap_init();
}
@@ -80,13 +81,16 @@ void __init kasan_init(void)
populate(kasan_mem_to_shadow((void *)VMALLOC_START),
kasan_mem_to_shadow((void *)XCHAL_KSEG_BYPASS_VADDR));
- /* Write protect kasan_zero_page and zero-initialize it again. */
+ /*
+ * Write protect kasan_early_shadow_page and zero-initialize it again.
+ */
for (i = 0; i < PTRS_PER_PTE; ++i)
- set_pte(kasan_zero_pte + i,
- mk_pte(virt_to_page(kasan_zero_page), PAGE_KERNEL_RO));
+ set_pte(kasan_early_shadow_pte + i,
+ mk_pte(virt_to_page(kasan_early_shadow_page),
+ PAGE_KERNEL_RO));
local_flush_tlb_all();
- memset(kasan_zero_page, 0, PAGE_SIZE);
+ memset(kasan_early_shadow_page, 0, PAGE_SIZE);
/* At this point kasan is fully initialized. Enable error messages. */
current->kasan_depth = 0;
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-30 03:38:03 +0100