x86/xen: Drop xen_mmu_ops

Instead of having a pre-filled array xen_mmu_ops for Xen PV paravirt
functions, drop the array and assign each element individually.

This is in preparation of reducing the paravirt include hell by
splitting paravirt.h into multiple more fine grained header files,
which will in turn require to split up the pv_ops vector as well.
Dropping the pre-filled array makes life easier for objtool to
detect missing initializers in multiple pv_ops_ arrays.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://patch.msgid.link/20260105110520.21356-18-jgross@suse.com

Author: jgross1

arch/x86/xen/mmu_pv.c

@@ -2175,73 +2175,49 @@ static void xen_leave_lazy_mmu(void)
 	preempt_enable();
 }
 
-static const typeof(pv_ops) xen_mmu_ops __initconst = {
-	.mmu = {
-		.read_cr2 = __PV_IS_CALLEE_SAVE(xen_read_cr2),
-		.write_cr2 = xen_write_cr2,
-
-		.read_cr3 = xen_read_cr3,
-		.write_cr3 = xen_write_cr3_init,
-
-		.flush_tlb_user = xen_flush_tlb,
-		.flush_tlb_kernel = xen_flush_tlb,
-		.flush_tlb_one_user = xen_flush_tlb_one_user,
-		.flush_tlb_multi = xen_flush_tlb_multi,
-
-		.pgd_alloc = xen_pgd_alloc,
-		.pgd_free = xen_pgd_free,
-
-		.alloc_pte = xen_alloc_pte_init,
-		.release_pte = xen_release_pte_init,
-		.alloc_pmd = xen_alloc_pmd_init,
-		.release_pmd = xen_release_pmd_init,
-
-		.set_pte = xen_set_pte_init,
-		.set_pmd = xen_set_pmd_hyper,
-
-		.ptep_modify_prot_start = xen_ptep_modify_prot_start,
-		.ptep_modify_prot_commit = xen_ptep_modify_prot_commit,
-
-		.pte_val = PV_CALLEE_SAVE(xen_pte_val),
-		.pgd_val = PV_CALLEE_SAVE(xen_pgd_val),
-
-		.make_pte = PV_CALLEE_SAVE(xen_make_pte_init),
-		.make_pgd = PV_CALLEE_SAVE(xen_make_pgd),
-
-		.set_pud = xen_set_pud_hyper,
-
-		.make_pmd = PV_CALLEE_SAVE(xen_make_pmd),
-		.pmd_val = PV_CALLEE_SAVE(xen_pmd_val),
-
-		.pud_val = PV_CALLEE_SAVE(xen_pud_val),
-		.make_pud = PV_CALLEE_SAVE(xen_make_pud),
-		.set_p4d = xen_set_p4d_hyper,
-
-		.alloc_pud = xen_alloc_pmd_init,
-		.release_pud = xen_release_pmd_init,
-
-		.p4d_val = PV_CALLEE_SAVE(xen_p4d_val),
-		.make_p4d = PV_CALLEE_SAVE(xen_make_p4d),
-
-		.enter_mmap = xen_enter_mmap,
-		.exit_mmap = xen_exit_mmap,
-
-		.lazy_mode = {
-			.enter = xen_enter_lazy_mmu,
-			.leave = xen_leave_lazy_mmu,
-			.flush = xen_flush_lazy_mmu,
-		},
-
-		.set_fixmap = xen_set_fixmap,
-	},
-};
-
 void __init xen_init_mmu_ops(void)
 {
 	x86_init.paging.pagetable_init = xen_pagetable_init;
 	x86_init.hyper.init_after_bootmem = xen_after_bootmem;
 
-	pv_ops.mmu = xen_mmu_ops.mmu;
+	pv_ops.mmu.read_cr2 = __PV_IS_CALLEE_SAVE(xen_read_cr2);
+	pv_ops.mmu.write_cr2 = xen_write_cr2;
+	pv_ops.mmu.read_cr3 = xen_read_cr3;
+	pv_ops.mmu.write_cr3 = xen_write_cr3_init;
+	pv_ops.mmu.flush_tlb_user = xen_flush_tlb;
+	pv_ops.mmu.flush_tlb_kernel = xen_flush_tlb;
+	pv_ops.mmu.flush_tlb_one_user = xen_flush_tlb_one_user;
+	pv_ops.mmu.flush_tlb_multi = xen_flush_tlb_multi;
+	pv_ops.mmu.pgd_alloc = xen_pgd_alloc;
+	pv_ops.mmu.pgd_free = xen_pgd_free;
+	pv_ops.mmu.alloc_pte = xen_alloc_pte_init;
+	pv_ops.mmu.release_pte = xen_release_pte_init;
+	pv_ops.mmu.alloc_pmd = xen_alloc_pmd_init;
+	pv_ops.mmu.release_pmd = xen_release_pmd_init;
+	pv_ops.mmu.set_pte = xen_set_pte_init;
+	pv_ops.mmu.set_pmd = xen_set_pmd_hyper;
+	pv_ops.mmu.ptep_modify_prot_start = xen_ptep_modify_prot_start;
+	pv_ops.mmu.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;
+	pv_ops.mmu.pte_val = PV_CALLEE_SAVE(xen_pte_val);
+	pv_ops.mmu.pgd_val = PV_CALLEE_SAVE(xen_pgd_val);
+	pv_ops.mmu.make_pte = PV_CALLEE_SAVE(xen_make_pte_init);
+	pv_ops.mmu.make_pgd = PV_CALLEE_SAVE(xen_make_pgd);
+	pv_ops.mmu.set_pud = xen_set_pud_hyper;
+	pv_ops.mmu.make_pmd = PV_CALLEE_SAVE(xen_make_pmd);
+	pv_ops.mmu.pmd_val = PV_CALLEE_SAVE(xen_pmd_val);
+	pv_ops.mmu.pud_val = PV_CALLEE_SAVE(xen_pud_val);
+	pv_ops.mmu.make_pud = PV_CALLEE_SAVE(xen_make_pud);
+	pv_ops.mmu.set_p4d = xen_set_p4d_hyper;
+	pv_ops.mmu.alloc_pud = xen_alloc_pmd_init;
+	pv_ops.mmu.release_pud = xen_release_pmd_init;
+	pv_ops.mmu.p4d_val = PV_CALLEE_SAVE(xen_p4d_val);
+	pv_ops.mmu.make_p4d = PV_CALLEE_SAVE(xen_make_p4d);
+	pv_ops.mmu.enter_mmap = xen_enter_mmap;
+	pv_ops.mmu.exit_mmap = xen_exit_mmap;
+	pv_ops.mmu.lazy_mode.enter = xen_enter_lazy_mmu;
+	pv_ops.mmu.lazy_mode.leave = xen_leave_lazy_mmu;
+	pv_ops.mmu.lazy_mode.flush = xen_flush_lazy_mmu;
+	pv_ops.mmu.set_fixmap = xen_set_fixmap;
 
 	memset(dummy_mapping, 0xff, PAGE_SIZE);
 }

tools/objtool/check.c

@@ -570,7 +570,6 @@ static int init_pv_ops(struct objtool_file *file)
 {
 	static const char *pv_ops_tables[] = {
 		"pv_ops",
-		"xen_mmu_ops",
 		NULL,
 	};
 	const char *pv_ops;