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Diffstat (limited to 'arch/arm64/mm')
-rw-r--r--arch/arm64/mm/context.c2
-rw-r--r--arch/arm64/mm/fault.c20
-rw-r--r--arch/arm64/mm/flush.c1
-rw-r--r--arch/arm64/mm/init.c44
-rw-r--r--arch/arm64/mm/kasan_init.c17
-rw-r--r--arch/arm64/mm/mmu.c13
-rw-r--r--arch/arm64/mm/proc.S19
7 files changed, 80 insertions, 36 deletions
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index e1e0dca01839..188197590fc9 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -364,8 +364,8 @@ void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm)
ttbr1 &= ~TTBR_ASID_MASK;
ttbr1 |= FIELD_PREP(TTBR_ASID_MASK, asid);
+ cpu_set_reserved_ttbr0_nosync();
write_sysreg(ttbr1, ttbr1_el1);
- isb();
write_sysreg(ttbr0, ttbr0_el1);
isb();
post_ttbr_update_workaround();
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 6045a5117ac1..c85b6d70b222 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -66,6 +66,8 @@ static inline const struct fault_info *esr_to_debug_fault_info(unsigned long esr
static void data_abort_decode(unsigned long esr)
{
+ unsigned long iss2 = ESR_ELx_ISS2(esr);
+
pr_alert("Data abort info:\n");
if (esr & ESR_ELx_ISV) {
@@ -78,12 +80,21 @@ static void data_abort_decode(unsigned long esr)
(esr & ESR_ELx_SF) >> ESR_ELx_SF_SHIFT,
(esr & ESR_ELx_AR) >> ESR_ELx_AR_SHIFT);
} else {
- pr_alert(" ISV = 0, ISS = 0x%08lx\n", esr & ESR_ELx_ISS_MASK);
+ pr_alert(" ISV = 0, ISS = 0x%08lx, ISS2 = 0x%08lx\n",
+ esr & ESR_ELx_ISS_MASK, iss2);
}
- pr_alert(" CM = %lu, WnR = %lu\n",
+ pr_alert(" CM = %lu, WnR = %lu, TnD = %lu, TagAccess = %lu\n",
(esr & ESR_ELx_CM) >> ESR_ELx_CM_SHIFT,
- (esr & ESR_ELx_WNR) >> ESR_ELx_WNR_SHIFT);
+ (esr & ESR_ELx_WNR) >> ESR_ELx_WNR_SHIFT,
+ (iss2 & ESR_ELx_TnD) >> ESR_ELx_TnD_SHIFT,
+ (iss2 & ESR_ELx_TagAccess) >> ESR_ELx_TagAccess_SHIFT);
+
+ pr_alert(" GCS = %ld, Overlay = %lu, DirtyBit = %lu, Xs = %llu\n",
+ (iss2 & ESR_ELx_GCS) >> ESR_ELx_GCS_SHIFT,
+ (iss2 & ESR_ELx_Overlay) >> ESR_ELx_Overlay_SHIFT,
+ (iss2 & ESR_ELx_DirtyBit) >> ESR_ELx_DirtyBit_SHIFT,
+ (iss2 & ESR_ELx_Xs_MASK) >> ESR_ELx_Xs_SHIFT);
}
static void mem_abort_decode(unsigned long esr)
@@ -885,9 +896,6 @@ void do_sp_pc_abort(unsigned long addr, unsigned long esr, struct pt_regs *regs)
}
NOKPROBE_SYMBOL(do_sp_pc_abort);
-int __init early_brk64(unsigned long addr, unsigned long esr,
- struct pt_regs *regs);
-
/*
* __refdata because early_brk64 is __init, but the reference to it is
* clobbered at arch_initcall time.
diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c
index 5f9379b3c8c8..4e6476094952 100644
--- a/arch/arm64/mm/flush.c
+++ b/arch/arm64/mm/flush.c
@@ -8,6 +8,7 @@
#include <linux/export.h>
#include <linux/mm.h>
+#include <linux/libnvdimm.h>
#include <linux/pagemap.h>
#include <asm/cacheflush.h>
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 66e70ca47680..c28c2c8483cc 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -69,6 +69,7 @@ phys_addr_t __ro_after_init arm64_dma_phys_limit;
#define CRASH_ADDR_LOW_MAX arm64_dma_phys_limit
#define CRASH_ADDR_HIGH_MAX (PHYS_MASK + 1)
+#define CRASH_HIGH_SEARCH_BASE SZ_4G
#define DEFAULT_CRASH_KERNEL_LOW_SIZE (128UL << 20)
@@ -101,12 +102,13 @@ static int __init reserve_crashkernel_low(unsigned long long low_size)
*/
static void __init reserve_crashkernel(void)
{
- unsigned long long crash_base, crash_size;
- unsigned long long crash_low_size = 0;
+ unsigned long long crash_low_size = 0, search_base = 0;
unsigned long long crash_max = CRASH_ADDR_LOW_MAX;
+ unsigned long long crash_base, crash_size;
char *cmdline = boot_command_line;
- int ret;
bool fixed_base = false;
+ bool high = false;
+ int ret;
if (!IS_ENABLED(CONFIG_KEXEC_CORE))
return;
@@ -129,7 +131,9 @@ static void __init reserve_crashkernel(void)
else if (ret)
return;
+ search_base = CRASH_HIGH_SEARCH_BASE;
crash_max = CRASH_ADDR_HIGH_MAX;
+ high = true;
} else if (ret || !crash_size) {
/* The specified value is invalid */
return;
@@ -140,31 +144,51 @@ static void __init reserve_crashkernel(void)
/* User specifies base address explicitly. */
if (crash_base) {
fixed_base = true;
+ search_base = crash_base;
crash_max = crash_base + crash_size;
}
retry:
crash_base = memblock_phys_alloc_range(crash_size, CRASH_ALIGN,
- crash_base, crash_max);
+ search_base, crash_max);
if (!crash_base) {
/*
- * If the first attempt was for low memory, fall back to
- * high memory, the minimum required low memory will be
- * reserved later.
+ * For crashkernel=size[KMG]@offset[KMG], print out failure
+ * message if can't reserve the specified region.
*/
- if (!fixed_base && (crash_max == CRASH_ADDR_LOW_MAX)) {
+ if (fixed_base) {
+ pr_warn("crashkernel reservation failed - memory is in use.\n");
+ return;
+ }
+
+ /*
+ * For crashkernel=size[KMG], if the first attempt was for
+ * low memory, fall back to high memory, the minimum required
+ * low memory will be reserved later.
+ */
+ if (!high && crash_max == CRASH_ADDR_LOW_MAX) {
crash_max = CRASH_ADDR_HIGH_MAX;
+ search_base = CRASH_ADDR_LOW_MAX;
crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
goto retry;
}
+ /*
+ * For crashkernel=size[KMG],high, if the first attempt was
+ * for high memory, fall back to low memory.
+ */
+ if (high && crash_max == CRASH_ADDR_HIGH_MAX) {
+ crash_max = CRASH_ADDR_LOW_MAX;
+ search_base = 0;
+ goto retry;
+ }
pr_warn("cannot allocate crashkernel (size:0x%llx)\n",
crash_size);
return;
}
- if ((crash_base > CRASH_ADDR_LOW_MAX - crash_low_size) &&
- crash_low_size && reserve_crashkernel_low(crash_low_size)) {
+ if ((crash_base >= CRASH_ADDR_LOW_MAX) && crash_low_size &&
+ reserve_crashkernel_low(crash_low_size)) {
memblock_phys_free(crash_base, crash_size);
return;
}
diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c
index e969e68de005..f17d066e85eb 100644
--- a/arch/arm64/mm/kasan_init.c
+++ b/arch/arm64/mm/kasan_init.c
@@ -214,7 +214,7 @@ static void __init clear_pgds(unsigned long start,
static void __init kasan_init_shadow(void)
{
u64 kimg_shadow_start, kimg_shadow_end;
- u64 mod_shadow_start, mod_shadow_end;
+ u64 mod_shadow_start;
u64 vmalloc_shadow_end;
phys_addr_t pa_start, pa_end;
u64 i;
@@ -223,7 +223,6 @@ static void __init kasan_init_shadow(void)
kimg_shadow_end = PAGE_ALIGN((u64)kasan_mem_to_shadow(KERNEL_END));
mod_shadow_start = (u64)kasan_mem_to_shadow((void *)MODULES_VADDR);
- mod_shadow_end = (u64)kasan_mem_to_shadow((void *)MODULES_END);
vmalloc_shadow_end = (u64)kasan_mem_to_shadow((void *)VMALLOC_END);
@@ -246,17 +245,9 @@ static void __init kasan_init_shadow(void)
kasan_populate_early_shadow(kasan_mem_to_shadow((void *)PAGE_END),
(void *)mod_shadow_start);
- if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
- BUILD_BUG_ON(VMALLOC_START != MODULES_END);
- kasan_populate_early_shadow((void *)vmalloc_shadow_end,
- (void *)KASAN_SHADOW_END);
- } else {
- kasan_populate_early_shadow((void *)kimg_shadow_end,
- (void *)KASAN_SHADOW_END);
- if (kimg_shadow_start > mod_shadow_end)
- kasan_populate_early_shadow((void *)mod_shadow_end,
- (void *)kimg_shadow_start);
- }
+ BUILD_BUG_ON(VMALLOC_START != MODULES_END);
+ kasan_populate_early_shadow((void *)vmalloc_shadow_end,
+ (void *)KASAN_SHADOW_END);
for_each_mem_range(i, &pa_start, &pa_end) {
void *start = (void *)__phys_to_virt(pa_start);
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index af6bc8403ee4..95d360805f8a 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -451,7 +451,7 @@ static phys_addr_t pgd_pgtable_alloc(int shift)
void __init create_mapping_noalloc(phys_addr_t phys, unsigned long virt,
phys_addr_t size, pgprot_t prot)
{
- if ((virt >= PAGE_END) && (virt < VMALLOC_START)) {
+ if (virt < PAGE_OFFSET) {
pr_warn("BUG: not creating mapping for %pa at 0x%016lx - outside kernel range\n",
&phys, virt);
return;
@@ -478,7 +478,7 @@ void __init create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
static void update_mapping_prot(phys_addr_t phys, unsigned long virt,
phys_addr_t size, pgprot_t prot)
{
- if ((virt >= PAGE_END) && (virt < VMALLOC_START)) {
+ if (virt < PAGE_OFFSET) {
pr_warn("BUG: not updating mapping for %pa at 0x%016lx - outside kernel range\n",
&phys, virt);
return;
@@ -663,12 +663,17 @@ static void __init map_kernel_segment(pgd_t *pgdp, void *va_start, void *va_end,
vm_area_add_early(vma);
}
+static pgprot_t kernel_exec_prot(void)
+{
+ return rodata_enabled ? PAGE_KERNEL_ROX : PAGE_KERNEL_EXEC;
+}
+
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
static int __init map_entry_trampoline(void)
{
int i;
- pgprot_t prot = rodata_enabled ? PAGE_KERNEL_ROX : PAGE_KERNEL_EXEC;
+ pgprot_t prot = kernel_exec_prot();
phys_addr_t pa_start = __pa_symbol(__entry_tramp_text_start);
/* The trampoline is always mapped and can therefore be global */
@@ -723,7 +728,7 @@ static void __init map_kernel(pgd_t *pgdp)
* mapping to install SW breakpoints. Allow this (only) when
* explicitly requested with rodata=off.
*/
- pgprot_t text_prot = rodata_enabled ? PAGE_KERNEL_ROX : PAGE_KERNEL_EXEC;
+ pgprot_t text_prot = kernel_exec_prot();
/*
* If we have a CPU that supports BTI and a kernel built for
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index c2cb437821ca..2baeec419f62 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -199,7 +199,7 @@ SYM_FUNC_END(idmap_cpu_replace_ttbr1)
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
-#define KPTI_NG_PTE_FLAGS (PTE_ATTRINDX(MT_NORMAL) | SWAPPER_PTE_FLAGS)
+#define KPTI_NG_PTE_FLAGS (PTE_ATTRINDX(MT_NORMAL) | SWAPPER_PTE_FLAGS | PTE_WRITE)
.pushsection ".idmap.text", "a"
@@ -290,7 +290,7 @@ SYM_TYPED_FUNC_START(idmap_kpti_install_ng_mappings)
isb
mov temp_pte, x5
- mov pte_flags, #KPTI_NG_PTE_FLAGS
+ mov_q pte_flags, KPTI_NG_PTE_FLAGS
/* Everybody is enjoying the idmap, so we can rewrite swapper. */
/* PGD */
@@ -454,6 +454,21 @@ SYM_FUNC_START(__cpu_setup)
#endif /* CONFIG_ARM64_HW_AFDBM */
msr mair_el1, mair
msr tcr_el1, tcr
+
+ mrs_s x1, SYS_ID_AA64MMFR3_EL1
+ ubfx x1, x1, #ID_AA64MMFR3_EL1_S1PIE_SHIFT, #4
+ cbz x1, .Lskip_indirection
+
+ mov_q x0, PIE_E0
+ msr REG_PIRE0_EL1, x0
+ mov_q x0, PIE_E1
+ msr REG_PIR_EL1, x0
+
+ mov x0, TCR2_EL1x_PIE
+ msr REG_TCR2_EL1, x0
+
+.Lskip_indirection:
+
/*
* Prepare SCTLR
*/
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-12 18:23:26 +0300