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Message-ID: <20251127070844.21919-18-jgross@suse.com>
Date: Thu, 27 Nov 2025 08:08:40 +0100
From: Juergen Gross <jgross@...e.com>
To: linux-kernel@...r.kernel.org,
x86@...nel.org
Cc: Juergen Gross <jgross@...e.com>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>,
"H. Peter Anvin" <hpa@...or.com>,
Josh Poimboeuf <jpoimboe@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
xen-devel@...ts.xenproject.org
Subject: [PATCH v4 17/21] 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@...e.com>
---
V2:
- new patch
---
arch/x86/xen/mmu_pv.c | 100 ++++++++++++++++--------------------------
tools/objtool/check.c | 1 -
2 files changed, 38 insertions(+), 63 deletions(-)
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index 2a4a8deaf612..9fa00c4a8858 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/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);
}
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 5c00bca8dc11..1c73426bea9f 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -593,7 +593,6 @@ 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;
--
2.51.0
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