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Subject[patch 2/3] x86/paravirt: Unify 32/64 bit patch code
Large parts of these two files are identical. Merge them together.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/kernel/Makefile | 4 -
arch/x86/kernel/paravirt_patch.c | 106 ++++++++++++++++++++++++++++++++++++
arch/x86/kernel/paravirt_patch_32.c | 64 ---------------------
arch/x86/kernel/paravirt_patch_64.c | 72 ------------------------
4 files changed, 108 insertions(+), 138 deletions(-)

--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -30,7 +30,7 @@ KASAN_SANITIZE_paravirt.o := n

OBJECT_FILES_NON_STANDARD_relocate_kernel_$(BITS).o := y
OBJECT_FILES_NON_STANDARD_test_nx.o := y
-OBJECT_FILES_NON_STANDARD_paravirt_patch_$(BITS).o := y
+OBJECT_FILES_NON_STANDARD_paravirt_patch.o := y

ifdef CONFIG_FRAME_POINTER
OBJECT_FILES_NON_STANDARD_ftrace_$(BITS).o := y
@@ -112,7 +112,7 @@ obj-$(CONFIG_AMD_NB) += amd_nb.o
obj-$(CONFIG_DEBUG_NMI_SELFTEST) += nmi_selftest.o

obj-$(CONFIG_KVM_GUEST) += kvm.o kvmclock.o
-obj-$(CONFIG_PARAVIRT) += paravirt.o paravirt_patch_$(BITS).o
+obj-$(CONFIG_PARAVIRT) += paravirt.o paravirt_patch.o
obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= paravirt-spinlocks.o
obj-$(CONFIG_PARAVIRT_CLOCK) += pvclock.o
obj-$(CONFIG_X86_PMEM_LEGACY_DEVICE) += pmem.o
--- /dev/null
+++ b/arch/x86/kernel/paravirt_patch.c
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/stringify.h>
+
+#include <asm/paravirt.h>
+#include <asm/asm-offsets.h>
+
+#ifdef CONFIG_X86_64
+# ifdef CONFIG_PARAVIRT_XXL
+DEF_NATIVE(irq, irq_disable, "cli");
+DEF_NATIVE(irq, irq_enable, "sti");
+DEF_NATIVE(irq, restore_fl, "pushq %rdi; popfq");
+DEF_NATIVE(irq, save_fl, "pushfq; popq %rax");
+DEF_NATIVE(mmu, read_cr2, "movq %cr2, %rax");
+DEF_NATIVE(mmu, read_cr3, "movq %cr3, %rax");
+DEF_NATIVE(mmu, write_cr3, "movq %rdi, %cr3");
+DEF_NATIVE(cpu, wbinvd, "wbinvd");
+DEF_NATIVE(cpu, usergs_sysret64, "swapgs; sysretq");
+DEF_NATIVE(cpu, swapgs, "swapgs");
+DEF_NATIVE(, mov64, "mov %rdi, %rax");
+
+unsigned int paravirt_patch_ident_64(void *insnbuf, unsigned int len)
+{
+ return paravirt_patch_insns(insnbuf, len, start__mov64, end__mov64);
+}
+# endif /* CONFIG_PARAVIRT_XXL */
+
+# ifdef CONFIG_PARAVIRT_SPINLOCKS
+DEF_NATIVE(lock, queued_spin_unlock, "movb $0, (%rdi)");
+DEF_NATIVE(lock, vcpu_is_preempted, "xor %eax, %eax");
+# endif
+
+#else /* CONFIG_X86_64 */
+
+# ifdef CONFIG_PARAVIRT_XXL
+DEF_NATIVE(irq, irq_disable, "cli");
+DEF_NATIVE(irq, irq_enable, "sti");
+DEF_NATIVE(irq, restore_fl, "push %eax; popf");
+DEF_NATIVE(irq, save_fl, "pushf; pop %eax");
+DEF_NATIVE(cpu, iret, "iret");
+DEF_NATIVE(mmu, read_cr2, "mov %cr2, %eax");
+DEF_NATIVE(mmu, write_cr3, "mov %eax, %cr3");
+DEF_NATIVE(mmu, read_cr3, "mov %cr3, %eax");
+
+unsigned int paravirt_patch_ident_64(void *insnbuf, unsigned int len)
+{
+ /* arg in %edx:%eax, return in %edx:%eax */
+ return 0;
+}
+# endif /* CONFIG_PARAVIRT_XXL */
+
+# ifdef CONFIG_PARAVIRT_SPINLOCKS
+DEF_NATIVE(lock, queued_spin_unlock, "movb $0, (%eax)");
+DEF_NATIVE(lock, vcpu_is_preempted, "xor %eax, %eax");
+# endif
+
+#endif /* !CONFIG_X86_64 */
+
+unsigned int native_patch(u8 type, void *ibuf, unsigned long addr,
+ unsigned int len)
+{
+#define PATCH_SITE(ops, x) \
+ case PARAVIRT_PATCH(ops.x): \
+ return paravirt_patch_insns(ibuf, len, start_##ops##_##x, end_##ops##_##x)
+
+ switch (type) {
+#ifdef CONFIG_PARAVIRT_XXL
+ PATCH_SITE(irq, restore_fl);
+ PATCH_SITE(irq, save_fl);
+ PATCH_SITE(irq, irq_enable);
+ PATCH_SITE(irq, irq_disable);
+
+ PATCH_SITE(mmu, read_cr2);
+ PATCH_SITE(mmu, read_cr3);
+ PATCH_SITE(mmu, write_cr3);
+
+# ifdef CONFIG_X86_64
+ PATCH_SITE(cpu, usergs_sysret64);
+ PATCH_SITE(cpu, swapgs);
+ PATCH_SITE(cpu, wbinvd);
+# else
+ PATCH_SITE(cpu, iret);
+# endif
+#endif
+
+#ifdef CONFIG_PARAVIRT_SPINLOCKS
+ case PARAVIRT_PATCH(lock.queued_spin_unlock):
+ if (pv_is_native_spin_unlock())
+ return paravirt_patch_insns(ibuf, len,
+ start_lock_queued_spin_unlock,
+ end_lock_queued_spin_unlock);
+ break;
+
+ case PARAVIRT_PATCH(lock.vcpu_is_preempted):
+ if (pv_is_native_vcpu_is_preempted())
+ return paravirt_patch_insns(ibuf, len,
+ start_lock_vcpu_is_preempted,
+ end_lock_vcpu_is_preempted);
+ break;
+#endif
+
+ default:
+ break;
+ }
+#undef PATCH_SITE
+ return paravirt_patch_default(type, ibuf, addr, len);
+}
--- a/arch/x86/kernel/paravirt_patch_32.c
+++ /dev/null
@@ -1,64 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <asm/paravirt.h>
-
-#ifdef CONFIG_PARAVIRT_XXL
-DEF_NATIVE(irq, irq_disable, "cli");
-DEF_NATIVE(irq, irq_enable, "sti");
-DEF_NATIVE(irq, restore_fl, "push %eax; popf");
-DEF_NATIVE(irq, save_fl, "pushf; pop %eax");
-DEF_NATIVE(cpu, iret, "iret");
-DEF_NATIVE(mmu, read_cr2, "mov %cr2, %eax");
-DEF_NATIVE(mmu, write_cr3, "mov %eax, %cr3");
-DEF_NATIVE(mmu, read_cr3, "mov %cr3, %eax");
-
-unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
-{
- /* arg in %edx:%eax, return in %edx:%eax */
- return 0;
-}
-#endif
-
-#if defined(CONFIG_PARAVIRT_SPINLOCKS)
-DEF_NATIVE(lock, queued_spin_unlock, "movb $0, (%eax)");
-DEF_NATIVE(lock, vcpu_is_preempted, "xor %eax, %eax");
-#endif
-
-unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
-{
-#define PATCH_SITE(ops, x) \
- case PARAVIRT_PATCH(ops.x): \
- return paravirt_patch_insns(ibuf, len, start_##ops##_##x, end_##ops##_##x)
-
- switch (type) {
-#ifdef CONFIG_PARAVIRT_XXL
- PATCH_SITE(irq, irq_disable);
- PATCH_SITE(irq, irq_enable);
- PATCH_SITE(irq, restore_fl);
- PATCH_SITE(irq, save_fl);
- PATCH_SITE(cpu, iret);
- PATCH_SITE(mmu, read_cr2);
- PATCH_SITE(mmu, read_cr3);
- PATCH_SITE(mmu, write_cr3);
-#endif
-#if defined(CONFIG_PARAVIRT_SPINLOCKS)
- case PARAVIRT_PATCH(lock.queued_spin_unlock):
- if (pv_is_native_spin_unlock())
- return paravirt_patch_insns(ibuf, len,
- start_lock_queued_spin_unlock,
- end_lock_queued_spin_unlock);
- break;
-
- case PARAVIRT_PATCH(lock.vcpu_is_preempted):
- if (pv_is_native_vcpu_is_preempted())
- return paravirt_patch_insns(ibuf, len,
- start_lock_vcpu_is_preempted,
- end_lock_vcpu_is_preempted);
- break;
-#endif
-
- default:
- break;
- }
-#undef PATCH_SITE
- return paravirt_patch_default(type, ibuf, addr, len);
-}
--- a/arch/x86/kernel/paravirt_patch_64.c
+++ /dev/null
@@ -1,72 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <asm/paravirt.h>
-#include <asm/asm-offsets.h>
-#include <linux/stringify.h>
-
-#ifdef CONFIG_PARAVIRT_XXL
-DEF_NATIVE(irq, irq_disable, "cli");
-DEF_NATIVE(irq, irq_enable, "sti");
-DEF_NATIVE(irq, restore_fl, "pushq %rdi; popfq");
-DEF_NATIVE(irq, save_fl, "pushfq; popq %rax");
-DEF_NATIVE(mmu, read_cr2, "movq %cr2, %rax");
-DEF_NATIVE(mmu, read_cr3, "movq %cr3, %rax");
-DEF_NATIVE(mmu, write_cr3, "movq %rdi, %cr3");
-DEF_NATIVE(cpu, wbinvd, "wbinvd");
-
-DEF_NATIVE(cpu, usergs_sysret64, "swapgs; sysretq");
-DEF_NATIVE(cpu, swapgs, "swapgs");
-DEF_NATIVE(, mov64, "mov %rdi, %rax");
-
-unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
-{
- return paravirt_patch_insns(insnbuf, len,
- start__mov64, end__mov64);
-}
-#endif
-
-#if defined(CONFIG_PARAVIRT_SPINLOCKS)
-DEF_NATIVE(lock, queued_spin_unlock, "movb $0, (%rdi)");
-DEF_NATIVE(lock, vcpu_is_preempted, "xor %eax, %eax");
-#endif
-
-unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
-{
-#define PATCH_SITE(ops, x) \
- case PARAVIRT_PATCH(ops.x): \
- return paravirt_patch_insns(ibuf, len, start_##ops##_##x, end_##ops##_##x)
-
- switch (type) {
-#ifdef CONFIG_PARAVIRT_XXL
- PATCH_SITE(irq, restore_fl);
- PATCH_SITE(irq, save_fl);
- PATCH_SITE(irq, irq_enable);
- PATCH_SITE(irq, irq_disable);
- PATCH_SITE(cpu, usergs_sysret64);
- PATCH_SITE(cpu, swapgs);
- PATCH_SITE(cpu, wbinvd);
- PATCH_SITE(mmu, read_cr2);
- PATCH_SITE(mmu, read_cr3);
- PATCH_SITE(mmu, write_cr3);
-#endif
-#if defined(CONFIG_PARAVIRT_SPINLOCKS)
- case PARAVIRT_PATCH(lock.queued_spin_unlock):
- if (pv_is_native_spin_unlock())
- return paravirt_patch_insns(ibuf, len,
- start_lock_queued_spin_unlock,
- end_lock_queued_spin_unlock);
- break;
-
- case PARAVIRT_PATCH(lock.vcpu_is_preempted):
- if (pv_is_native_vcpu_is_preempted())
- return paravirt_patch_insns(ibuf, len,
- start_lock_vcpu_is_preempted,
- end_lock_vcpu_is_preempted);
- break;
-#endif
-
- default:
- break;
- }
-#undef PATCH_SITE
- return paravirt_patch_default(type, ibuf, addr, len);
-}

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