Merge tag 'kvmarm-fixes-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.12, take #1

- Fix pKVM error path on init, making sure we do not change critical
  system registers as we're about to fail

- Make sure that the host's vector length is at capped by a value
  common to all CPUs

- Fix kvm_has_feat*() handling of "negative" features, as the current
  code is pretty broken

- Promote Joey to the status of official reviewer, while James steps
  down -- hopefully only temporarly

1 files changed, 37 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/code-patching.h b/arch/powerpc/include/asm/code-patching.h
index 0e29ccf903d09..e7f14720f6307 100644
--- a/arch/powerpc/include/asm/code-patching.h
+++ b/arch/powerpc/include/asm/code-patching.h
@@ -76,6 +76,43 @@ int patch_instruction(u32 *addr, ppc_inst_t instr);
 int raw_patch_instruction(u32 *addr, ppc_inst_t instr);
 int patch_instructions(u32 *addr, u32 *code, size_t len, bool repeat_instr);
 
+/*
+ * The data patching functions patch_uint() and patch_ulong(), etc., must be
+ * called on aligned addresses.
+ *
+ * The instruction patching functions patch_instruction() and similar must be
+ * called on addresses satisfying instruction alignment requirements.
+ */
+
+#ifdef CONFIG_PPC64
+
+int patch_uint(void *addr, unsigned int val);
+int patch_ulong(void *addr, unsigned long val);
+
+#define patch_u64 patch_ulong
+
+#else
+
+static inline int patch_uint(void *addr, unsigned int val)
+{
+	if (!IS_ALIGNED((unsigned long)addr, sizeof(unsigned int)))
+		return -EINVAL;
+
+	return patch_instruction(addr, ppc_inst(val));
+}
+
+static inline int patch_ulong(void *addr, unsigned long val)
+{
+	if (!IS_ALIGNED((unsigned long)addr, sizeof(unsigned long)))
+		return -EINVAL;
+
+	return patch_instruction(addr, ppc_inst(val));
+}
+
+#endif
+
+#define patch_u32 patch_uint
+
 static inline unsigned long patch_site_addr(s32 *site)
 {
 	return (unsigned long)site + *site;