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-rw-r--r--arch/powerpc/include/asm/page.h12
-rw-r--r--arch/powerpc/kernel/time.c14
-rw-r--r--arch/powerpc/kvm/book3s_pr_papr.c34
-rw-r--r--arch/powerpc/platforms/cell/spufs/coredump.c2
4 files changed, 51 insertions, 11 deletions
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h
index 3140c19c448c..70b379ee6b7e 100644
--- a/arch/powerpc/include/asm/page.h
+++ b/arch/powerpc/include/asm/page.h
@@ -132,7 +132,19 @@ extern long long virt_phys_offset;
#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
+
+#ifdef CONFIG_PPC_BOOK3S_64
+/*
+ * On hash the vmalloc and other regions alias to the kernel region when passed
+ * through __pa(), which virt_to_pfn() uses. That means virt_addr_valid() can
+ * return true for some vmalloc addresses, which is incorrect. So explicitly
+ * check that the address is in the kernel region.
+ */
+#define virt_addr_valid(kaddr) (REGION_ID(kaddr) == KERNEL_REGION_ID && \
+ pfn_valid(virt_to_pfn(kaddr)))
+#else
#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
+#endif
/*
* On Book-E parts we need __va to parse the device tree and we can't
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 1be1092c7204..9baba9576e99 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -686,12 +686,20 @@ static int __init get_freq(char *name, int cells, unsigned long *val)
static void start_cpu_decrementer(void)
{
#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
+ unsigned int tcr;
+
/* Clear any pending timer interrupts */
mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
- /* Enable decrementer interrupt */
- mtspr(SPRN_TCR, TCR_DIE);
-#endif /* defined(CONFIG_BOOKE) || defined(CONFIG_40x) */
+ tcr = mfspr(SPRN_TCR);
+ /*
+ * The watchdog may have already been enabled by u-boot. So leave
+ * TRC[WP] (Watchdog Period) alone.
+ */
+ tcr &= TCR_WP_MASK; /* Clear all bits except for TCR[WP] */
+ tcr |= TCR_DIE; /* Enable decrementer */
+ mtspr(SPRN_TCR, tcr);
+#endif
}
void __init generic_calibrate_decr(void)
diff --git a/arch/powerpc/kvm/book3s_pr_papr.c b/arch/powerpc/kvm/book3s_pr_papr.c
index f2c75a1e0536..0d91baf63fed 100644
--- a/arch/powerpc/kvm/book3s_pr_papr.c
+++ b/arch/powerpc/kvm/book3s_pr_papr.c
@@ -50,7 +50,9 @@ static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
pteg_addr = get_pteg_addr(vcpu, pte_index);
mutex_lock(&vcpu->kvm->arch.hpt_mutex);
- copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg));
+ ret = H_FUNCTION;
+ if (copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg)))
+ goto done;
hpte = pteg;
ret = H_PTEG_FULL;
@@ -71,7 +73,9 @@ static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
hpte[0] = cpu_to_be64(kvmppc_get_gpr(vcpu, 6));
hpte[1] = cpu_to_be64(kvmppc_get_gpr(vcpu, 7));
pteg_addr += i * HPTE_SIZE;
- copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE);
+ ret = H_FUNCTION;
+ if (copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE))
+ goto done;
kvmppc_set_gpr(vcpu, 4, pte_index | i);
ret = H_SUCCESS;
@@ -93,7 +97,9 @@ static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
pteg = get_pteg_addr(vcpu, pte_index);
mutex_lock(&vcpu->kvm->arch.hpt_mutex);
- copy_from_user(pte, (void __user *)pteg, sizeof(pte));
+ ret = H_FUNCTION;
+ if (copy_from_user(pte, (void __user *)pteg, sizeof(pte)))
+ goto done;
pte[0] = be64_to_cpu((__force __be64)pte[0]);
pte[1] = be64_to_cpu((__force __be64)pte[1]);
@@ -103,7 +109,9 @@ static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
((flags & H_ANDCOND) && (pte[0] & avpn) != 0))
goto done;
- copy_to_user((void __user *)pteg, &v, sizeof(v));
+ ret = H_FUNCTION;
+ if (copy_to_user((void __user *)pteg, &v, sizeof(v)))
+ goto done;
rb = compute_tlbie_rb(pte[0], pte[1], pte_index);
vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
@@ -171,7 +179,10 @@ static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
}
pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX);
- copy_from_user(pte, (void __user *)pteg, sizeof(pte));
+ if (copy_from_user(pte, (void __user *)pteg, sizeof(pte))) {
+ ret = H_FUNCTION;
+ break;
+ }
pte[0] = be64_to_cpu((__force __be64)pte[0]);
pte[1] = be64_to_cpu((__force __be64)pte[1]);
@@ -184,7 +195,10 @@ static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
tsh |= H_BULK_REMOVE_NOT_FOUND;
} else {
/* Splat the pteg in (userland) hpt */
- copy_to_user((void __user *)pteg, &v, sizeof(v));
+ if (copy_to_user((void __user *)pteg, &v, sizeof(v))) {
+ ret = H_FUNCTION;
+ break;
+ }
rb = compute_tlbie_rb(pte[0], pte[1],
tsh & H_BULK_REMOVE_PTEX);
@@ -211,7 +225,9 @@ static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
pteg = get_pteg_addr(vcpu, pte_index);
mutex_lock(&vcpu->kvm->arch.hpt_mutex);
- copy_from_user(pte, (void __user *)pteg, sizeof(pte));
+ ret = H_FUNCTION;
+ if (copy_from_user(pte, (void __user *)pteg, sizeof(pte)))
+ goto done;
pte[0] = be64_to_cpu((__force __be64)pte[0]);
pte[1] = be64_to_cpu((__force __be64)pte[1]);
@@ -234,7 +250,9 @@ static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
pte[0] = (__force u64)cpu_to_be64(pte[0]);
pte[1] = (__force u64)cpu_to_be64(pte[1]);
- copy_to_user((void __user *)pteg, pte, sizeof(pte));
+ ret = H_FUNCTION;
+ if (copy_to_user((void __user *)pteg, pte, sizeof(pte)))
+ goto done;
ret = H_SUCCESS;
done:
diff --git a/arch/powerpc/platforms/cell/spufs/coredump.c b/arch/powerpc/platforms/cell/spufs/coredump.c
index be6212ddbf06..7e42e3ec2142 100644
--- a/arch/powerpc/platforms/cell/spufs/coredump.c
+++ b/arch/powerpc/platforms/cell/spufs/coredump.c
@@ -174,6 +174,8 @@ static int spufs_arch_write_note(struct spu_context *ctx, int i,
if (!dump_skip(cprm,
roundup(cprm->written - total + sz, 4) - cprm->written))
goto Eio;
+
+ rc = 0;
out:
free_page((unsigned long)buf);
return rc;
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-09 17:08:08 +0000