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authorLinus Torvalds <torvalds@linux-foundation.org>2022-09-24 01:28:51 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-09-24 01:28:51 +0300
commita63f2e7cb1107ab124f80407e5eb8579c04eb7a9 (patch)
treec8f5ee1470dc7e7a52d0bd85178720e46c385172 /arch
parent1707c39ae309bf91965aa6f04d63816a090d90a1 (diff)
parent13b0566962914e167cb3238fbe29ced618f07a27 (diff)
downloadlinux-a63f2e7cb1107ab124f80407e5eb8579c04eb7a9.tar.xz
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon: "These are all very simple and self-contained, although the CFI jump-table fix touches the generic linker script as that's where the problematic macro lives. - Fix false positive "sleeping while atomic" warning resulting from the kPTI rework taking a mutex too early. - Fix possible overflow in AMU frequency calculation - Fix incorrect shift in CMN PMU driver which causes problems with newer versions of the IP - Reduce alignment of the CFI jump table to avoid huge kernel images and link errors with !4KiB page size configurations" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: vmlinux.lds.h: CFI: Reduce alignment of jump-table to function alignment perf/arm-cmn: Add more bits to child node address offset field arm64: topology: fix possible overflow in amu_fie_setup() arm64: mm: don't acquire mutex when rewriting swapper
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/kernel/topology.c2
-rw-r--r--arch/arm64/mm/mmu.c32
2 files changed, 19 insertions, 15 deletions
diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
index ad2bfc794257..44ebf5b2fc4b 100644
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -237,7 +237,7 @@ static void amu_fie_setup(const struct cpumask *cpus)
for_each_cpu(cpu, cpus) {
if (!freq_counters_valid(cpu) ||
freq_inv_set_max_ratio(cpu,
- cpufreq_get_hw_max_freq(cpu) * 1000,
+ cpufreq_get_hw_max_freq(cpu) * 1000ULL,
arch_timer_get_rate()))
return;
}
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index e7ad44585f40..eb489302c28a 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -331,12 +331,6 @@ static void alloc_init_pud(pgd_t *pgdp, unsigned long addr, unsigned long end,
}
BUG_ON(p4d_bad(p4d));
- /*
- * No need for locking during early boot. And it doesn't work as
- * expected with KASLR enabled.
- */
- if (system_state != SYSTEM_BOOTING)
- mutex_lock(&fixmap_lock);
pudp = pud_set_fixmap_offset(p4dp, addr);
do {
pud_t old_pud = READ_ONCE(*pudp);
@@ -368,15 +362,13 @@ static void alloc_init_pud(pgd_t *pgdp, unsigned long addr, unsigned long end,
} while (pudp++, addr = next, addr != end);
pud_clear_fixmap();
- if (system_state != SYSTEM_BOOTING)
- mutex_unlock(&fixmap_lock);
}
-static void __create_pgd_mapping(pgd_t *pgdir, phys_addr_t phys,
- unsigned long virt, phys_addr_t size,
- pgprot_t prot,
- phys_addr_t (*pgtable_alloc)(int),
- int flags)
+static void __create_pgd_mapping_locked(pgd_t *pgdir, phys_addr_t phys,
+ unsigned long virt, phys_addr_t size,
+ pgprot_t prot,
+ phys_addr_t (*pgtable_alloc)(int),
+ int flags)
{
unsigned long addr, end, next;
pgd_t *pgdp = pgd_offset_pgd(pgdir, virt);
@@ -400,8 +392,20 @@ static void __create_pgd_mapping(pgd_t *pgdir, phys_addr_t phys,
} while (pgdp++, addr = next, addr != end);
}
+static void __create_pgd_mapping(pgd_t *pgdir, phys_addr_t phys,
+ unsigned long virt, phys_addr_t size,
+ pgprot_t prot,
+ phys_addr_t (*pgtable_alloc)(int),
+ int flags)
+{
+ mutex_lock(&fixmap_lock);
+ __create_pgd_mapping_locked(pgdir, phys, virt, size, prot,
+ pgtable_alloc, flags);
+ mutex_unlock(&fixmap_lock);
+}
+
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
-extern __alias(__create_pgd_mapping)
+extern __alias(__create_pgd_mapping_locked)
void create_kpti_ng_temp_pgd(pgd_t *pgdir, phys_addr_t phys, unsigned long virt,
phys_addr_t size, pgprot_t prot,
phys_addr_t (*pgtable_alloc)(int), int flags);