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-rw-r--r--arch/arm64/kernel/efi.c57
-rw-r--r--arch/arm64/kernel/head.S13
-rw-r--r--arch/arm64/kernel/hw_breakpoint.c4
-rw-r--r--arch/arm64/kernel/image.h1
-rw-r--r--arch/arm64/kernel/perf_callchain.c4
-rw-r--r--arch/arm64/kernel/smp_spin_table.c11
6 files changed, 66 insertions, 24 deletions
diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
index b6abc85..78f5248 100644
--- a/arch/arm64/kernel/efi.c
+++ b/arch/arm64/kernel/efi.c
@@ -17,22 +17,51 @@
#include <asm/efi.h>
-int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md)
+/*
+ * Only regions of type EFI_RUNTIME_SERVICES_CODE need to be
+ * executable, everything else can be mapped with the XN bits
+ * set. Also take the new (optional) RO/XP bits into account.
+ */
+static __init pteval_t create_mapping_protection(efi_memory_desc_t *md)
{
- pteval_t prot_val;
+ u64 attr = md->attribute;
+ u32 type = md->type;
- /*
- * Only regions of type EFI_RUNTIME_SERVICES_CODE need to be
- * executable, everything else can be mapped with the XN bits
- * set.
- */
- if ((md->attribute & EFI_MEMORY_WB) == 0)
- prot_val = PROT_DEVICE_nGnRE;
- else if (md->type == EFI_RUNTIME_SERVICES_CODE ||
- !PAGE_ALIGNED(md->phys_addr))
- prot_val = pgprot_val(PAGE_KERNEL_EXEC);
- else
- prot_val = pgprot_val(PAGE_KERNEL);
+ if (type == EFI_MEMORY_MAPPED_IO)
+ return PROT_DEVICE_nGnRE;
+
+ if (WARN_ONCE(!PAGE_ALIGNED(md->phys_addr),
+ "UEFI Runtime regions are not aligned to 64 KB -- buggy firmware?"))
+ /*
+ * If the region is not aligned to the page size of the OS, we
+ * can not use strict permissions, since that would also affect
+ * the mapping attributes of the adjacent regions.
+ */
+ return pgprot_val(PAGE_KERNEL_EXEC);
+
+ /* R-- */
+ if ((attr & (EFI_MEMORY_XP | EFI_MEMORY_RO)) ==
+ (EFI_MEMORY_XP | EFI_MEMORY_RO))
+ return pgprot_val(PAGE_KERNEL_RO);
+
+ /* R-X */
+ if (attr & EFI_MEMORY_RO)
+ return pgprot_val(PAGE_KERNEL_ROX);
+
+ /* RW- */
+ if (attr & EFI_MEMORY_XP || type != EFI_RUNTIME_SERVICES_CODE)
+ return pgprot_val(PAGE_KERNEL);
+
+ /* RWX */
+ return pgprot_val(PAGE_KERNEL_EXEC);
+}
+
+/* we will fill this structure from the stub, so don't put it in .bss */
+struct screen_info screen_info __section(.data);
+
+int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md)
+{
+ pteval_t prot_val = create_mapping_protection(md);
create_pgd_mapping(mm, md->phys_addr, md->virt_addr,
md->num_pages << EFI_PAGE_SHIFT,
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 564c340..2c6e598 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -547,6 +547,15 @@ set_hcr:
msr vpidr_el2, x0
msr vmpidr_el2, x1
+ /*
+ * When VHE is not in use, early init of EL2 and EL1 needs to be
+ * done here.
+ * When VHE _is_ in use, EL1 will not be used in the host and
+ * requires no configuration, and all non-hyp-specific EL2 setup
+ * will be done via the _EL1 system register aliases in __cpu_setup.
+ */
+ cbnz x2, 1f
+
/* sctlr_el1 */
mov x0, #0x0800 // Set/clear RES{1,0} bits
CPU_BE( movk x0, #0x33d0, lsl #16 ) // Set EE and E0E on BE systems
@@ -556,6 +565,7 @@ CPU_LE( movk x0, #0x30d0, lsl #16 ) // Clear EE and E0E on LE systems
/* Coprocessor traps. */
mov x0, #0x33ff
msr cptr_el2, x0 // Disable copro. traps to EL2
+1:
#ifdef CONFIG_COMPAT
msr hstr_el2, xzr // Disable CP15 traps to EL2
@@ -690,7 +700,8 @@ ENDPROC(__secondary_switched)
.macro update_early_cpu_boot_status status, tmp1, tmp2
mov \tmp2, #\status
- str_l \tmp2, __early_cpu_boot_status, \tmp1
+ adr_l \tmp1, __early_cpu_boot_status
+ str \tmp2, [\tmp1]
dmb sy
dc ivac, \tmp1 // Invalidate potentially stale cache line
.endm
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index 11dc50a..ce21aa8 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -616,7 +616,7 @@ static int breakpoint_handler(unsigned long unused, unsigned int esr,
perf_bp_event(bp, regs);
/* Do we need to handle the stepping? */
- if (!bp->overflow_handler)
+ if (is_default_overflow_handler(bp))
step = 1;
unlock:
rcu_read_unlock();
@@ -712,7 +712,7 @@ static int watchpoint_handler(unsigned long addr, unsigned int esr,
perf_bp_event(wp, regs);
/* Do we need to handle the stepping? */
- if (!wp->overflow_handler)
+ if (is_default_overflow_handler(wp))
step = 1;
unlock:
diff --git a/arch/arm64/kernel/image.h b/arch/arm64/kernel/image.h
index 86d444f..c7fcb23 100644
--- a/arch/arm64/kernel/image.h
+++ b/arch/arm64/kernel/image.h
@@ -114,6 +114,7 @@ __efistub___memset = KALLSYMS_HIDE(__pi_memset);
__efistub__text = KALLSYMS_HIDE(_text);
__efistub__end = KALLSYMS_HIDE(_end);
__efistub__edata = KALLSYMS_HIDE(_edata);
+__efistub_screen_info = KALLSYMS_HIDE(screen_info);
#endif
diff --git a/arch/arm64/kernel/perf_callchain.c b/arch/arm64/kernel/perf_callchain.c
index ff46654..32c3c6e 100644
--- a/arch/arm64/kernel/perf_callchain.c
+++ b/arch/arm64/kernel/perf_callchain.c
@@ -122,7 +122,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry,
tail = (struct frame_tail __user *)regs->regs[29];
- while (entry->nr < PERF_MAX_STACK_DEPTH &&
+ while (entry->nr < sysctl_perf_event_max_stack &&
tail && !((unsigned long)tail & 0xf))
tail = user_backtrace(tail, entry);
} else {
@@ -132,7 +132,7 @@ void perf_callchain_user(struct perf_callchain_entry *entry,
tail = (struct compat_frame_tail __user *)regs->compat_fp - 1;
- while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
+ while ((entry->nr < sysctl_perf_event_max_stack) &&
tail && !((unsigned long)tail & 0x3))
tail = compat_user_backtrace(tail, entry);
#endif
diff --git a/arch/arm64/kernel/smp_spin_table.c b/arch/arm64/kernel/smp_spin_table.c
index aef3605..18a71bc 100644
--- a/arch/arm64/kernel/smp_spin_table.c
+++ b/arch/arm64/kernel/smp_spin_table.c
@@ -52,6 +52,7 @@ static void write_pen_release(u64 val)
static int smp_spin_table_cpu_init(unsigned int cpu)
{
struct device_node *dn;
+ int ret;
dn = of_get_cpu_node(cpu, NULL);
if (!dn)
@@ -60,15 +61,15 @@ static int smp_spin_table_cpu_init(unsigned int cpu)
/*
* Determine the address from which the CPU is polling.
*/
- if (of_property_read_u64(dn, "cpu-release-addr",
- &cpu_release_addr[cpu])) {
+ ret = of_property_read_u64(dn, "cpu-release-addr",
+ &cpu_release_addr[cpu]);
+ if (ret)
pr_err("CPU %d: missing or invalid cpu-release-addr property\n",
cpu);
- return -1;
- }
+ of_node_put(dn);
- return 0;
+ return ret;
}
static int smp_spin_table_cpu_prepare(unsigned int cpu)
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