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Message-Id: <20200815100641.26362-6-jgross@suse.com>
Date: Sat, 15 Aug 2020 12:06:40 +0200
From: Juergen Gross <jgross@...e.com>
To: xen-devel@...ts.xenproject.org, x86@...nel.org,
virtualization@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org
Cc: Juergen Gross <jgross@...e.com>, Deep Shah <sdeep@...are.com>,
"VMware, Inc." <pv-drivers@...are.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
"H. Peter Anvin" <hpa@...or.com>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Stefano Stabellini <sstabellini@...nel.org>,
Steven Rostedt <rostedt@...dmis.org>
Subject: [PATCH v4 5/6] x86/paravirt: remove set_pte_at pv-op
On x86 set_pte_at() is now always falling back to set_pte(). So instead
of having this fallback after the paravirt maze just drop the
set_pte_at paravirt operation and let set_pte_at() use the set_pte()
function directly.
Signed-off-by: Juergen Gross <jgross@...e.com>
---
arch/x86/include/asm/paravirt.h | 8 +-------
arch/x86/include/asm/paravirt_types.h | 2 --
arch/x86/include/asm/pgtable.h | 7 +++----
arch/x86/kernel/paravirt.c | 1 -
arch/x86/xen/mmu_pv.c | 8 --------
include/trace/events/xen.h | 20 --------------------
6 files changed, 4 insertions(+), 42 deletions(-)
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index e02c409fa054..f0464b88ea1e 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -412,12 +412,6 @@ static inline void set_pte(pte_t *ptep, pte_t pte)
PVOP_VCALL2(mmu.set_pte, ptep, pte.pte);
}
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte)
-{
- PVOP_VCALL4(mmu.set_pte_at, mm, addr, ptep, pte.pte);
-}
-
static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
{
PVOP_VCALL2(mmu.set_pmd, pmdp, native_pmd_val(pmd));
@@ -510,7 +504,7 @@ static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
{
- set_pte_at(mm, addr, ptep, __pte(0));
+ set_pte(ptep, __pte(0));
}
static inline void pmd_clear(pmd_t *pmdp)
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index f27c3febaa6e..0fad9f61c76a 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -242,8 +242,6 @@ struct pv_mmu_ops {
/* Pagetable manipulation functions */
void (*set_pte)(pte_t *ptep, pte_t pteval);
- void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pteval);
void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr,
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index b836138ce852..7414b416779b 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -63,7 +63,6 @@ extern pmdval_t early_pmd_flags;
#include <asm/paravirt.h>
#else /* !CONFIG_PARAVIRT_XXL */
#define set_pte(ptep, pte) native_set_pte(ptep, pte)
-#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
#define set_pte_atomic(ptep, pte) \
native_set_pte_atomic(ptep, pte)
@@ -1033,10 +1032,10 @@ static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp)
return res;
}
-static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep , pte_t pte)
+static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte)
{
- native_set_pte(ptep, pte);
+ set_pte(ptep, pte);
}
static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index e56a144c13b3..6c3407ba6ee9 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -360,7 +360,6 @@ struct paravirt_patch_template pv_ops = {
.mmu.release_p4d = paravirt_nop,
.mmu.set_pte = native_set_pte,
- .mmu.set_pte_at = native_set_pte_at,
.mmu.set_pmd = native_set_pmd,
.mmu.ptep_modify_prot_start = __ptep_modify_prot_start,
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index 3273c985d3dd..eda78144c000 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -285,13 +285,6 @@ static void xen_set_pte(pte_t *ptep, pte_t pteval)
__xen_set_pte(ptep, pteval);
}
-static void xen_set_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pteval)
-{
- trace_xen_mmu_set_pte_at(mm, addr, ptep, pteval);
- __xen_set_pte(ptep, pteval);
-}
-
pte_t xen_ptep_modify_prot_start(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
{
@@ -2105,7 +2098,6 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.release_pmd = xen_release_pmd_init,
.set_pte = xen_set_pte_init,
- .set_pte_at = xen_set_pte_at,
.set_pmd = xen_set_pmd_hyper,
.ptep_modify_prot_start = __ptep_modify_prot_start,
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index a5ccfa67bc5c..3b61b587e137 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -153,26 +153,6 @@ DECLARE_EVENT_CLASS(xen_mmu__set_pte,
DEFINE_XEN_MMU_SET_PTE(xen_mmu_set_pte);
-TRACE_EVENT(xen_mmu_set_pte_at,
- TP_PROTO(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pteval),
- TP_ARGS(mm, addr, ptep, pteval),
- TP_STRUCT__entry(
- __field(struct mm_struct *, mm)
- __field(unsigned long, addr)
- __field(pte_t *, ptep)
- __field(pteval_t, pteval)
- ),
- TP_fast_assign(__entry->mm = mm;
- __entry->addr = addr;
- __entry->ptep = ptep;
- __entry->pteval = pteval.pte),
- TP_printk("mm %p addr %lx ptep %p pteval %0*llx (raw %0*llx)",
- __entry->mm, __entry->addr, __entry->ptep,
- (int)sizeof(pteval_t) * 2, (unsigned long long)pte_val(native_make_pte(__entry->pteval)),
- (int)sizeof(pteval_t) * 2, (unsigned long long)__entry->pteval)
- );
-
TRACE_DEFINE_SIZEOF(pmdval_t);
TRACE_EVENT(xen_mmu_set_pmd,
--
2.26.2
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