From: James Hogan <james.hogan@imgtec.com>
To: linux-mips@linux-mips.org
Cc: "James Hogan" <james.hogan@imgtec.com>,
"Ralf Baechle" <ralf@linux-mips.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
kvm@vger.kernel.org
Subject: [PATCH v2 1/30] MIPS: Move pgd_alloc() out of header
Date: Thu, 2 Feb 2017 12:04:14 +0000 [thread overview]
Message-ID: <21f45e82ab0d734ea1ef614551639f2e8d900557.1486036366.git-series.james.hogan@imgtec.com> (raw)
Message-ID: <20170202120414.3UyNxCs6UYNVhCd3MNxAw434GwvDKYkwYSl1JqHFOUU@z> (raw)
In-Reply-To: <cover.e37f86dece46fc3ed00a075d68119cab361cda8e.1486036366.git-series.james.hogan@imgtec.com>
pgd_alloc() references init_mm which is not exported to modules. In
order for KVM to be able to use pgd_alloc() to allocate GVA page tables,
move pgd_alloc() into a new pgtable.c file and export it to modules.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
---
Changes in v2:
- Move pgd_alloc() into C code rather than exporting init_mm itself
(feedback from Arjan van de Ven).
---
arch/mips/include/asm/pgalloc.h | 16 +---------------
arch/mips/mm/Makefile | 2 +-
arch/mips/mm/pgtable.c | 25 +++++++++++++++++++++++++
3 files changed, 27 insertions(+), 16 deletions(-)
create mode 100644 arch/mips/mm/pgtable.c
diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h
index a03e86969f78..a8705f6c8180 100644
--- a/arch/mips/include/asm/pgalloc.h
+++ b/arch/mips/include/asm/pgalloc.h
@@ -43,21 +43,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
* Initialize a new pgd / pmd table with invalid pointers.
*/
extern void pgd_init(unsigned long page);
-
-static inline pgd_t *pgd_alloc(struct mm_struct *mm)
-{
- pgd_t *ret, *init;
-
- ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
- if (ret) {
- init = pgd_offset(&init_mm, 0UL);
- pgd_init((unsigned long)ret);
- memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
- (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
- }
-
- return ret;
-}
+extern pgd_t *pgd_alloc(struct mm_struct *mm);
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile
index b4c64bd3f723..b4cc8811a664 100644
--- a/arch/mips/mm/Makefile
+++ b/arch/mips/mm/Makefile
@@ -4,7 +4,7 @@
obj-y += cache.o dma-default.o extable.o fault.o \
gup.o init.o mmap.o page.o page-funcs.o \
- tlbex.o tlbex-fault.o tlb-funcs.o
+ pgtable.o tlbex.o tlbex-fault.o tlb-funcs.o
ifdef CONFIG_CPU_MICROMIPS
obj-y += uasm-micromips.o
diff --git a/arch/mips/mm/pgtable.c b/arch/mips/mm/pgtable.c
new file mode 100644
index 000000000000..05560b042d82
--- /dev/null
+++ b/arch/mips/mm/pgtable.c
@@ -0,0 +1,25 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/export.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <asm/pgalloc.h>
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+ pgd_t *ret, *init;
+
+ ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
+ if (ret) {
+ init = pgd_offset(&init_mm, 0UL);
+ pgd_init((unsigned long)ret);
+ memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
+ (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pgd_alloc);
--
git-series 0.8.10
next prev parent reply other threads:[~2017-02-02 12:04 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-02 12:04 [PATCH v2 0/30] KVM: MIPS: Implement GVA page tables James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` James Hogan [this message]
2017-02-02 12:04 ` [PATCH v2 1/30] MIPS: Move pgd_alloc() out of header James Hogan
2017-02-02 12:04 ` [PATCH v2 2/30] MIPS: Export pgd/pmd symbols for KVM James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 3/30] MIPS: uasm: Add include guards in asm/uasm.h James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 4/30] MIPS: Export some tlbex internals for KVM to use James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 5/30] KVM: MIPS: Drop partial KVM_NMI implementation James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 6/30] KVM: MIPS/MMU: Simplify ASID restoration James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 7/30] KVM: MIPS: Convert get/set_regs -> vcpu_load/put James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 8/30] KVM: MIPS/MMU: Move preempt/ASID handling to implementation James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 9/30] KVM: MIPS: Remove duplicated ASIDs from vcpu James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 10/30] KVM: MIPS: Add vcpu_run() & vcpu_reenter() callbacks James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 11/30] KVM: MIPS/T&E: Restore host asid on return to host James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 12/30] KVM: MIPS/T&E: active_mm = init_mm in guest context James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 13/30] KVM: MIPS: Wire up vcpu uninit James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 14/30] KVM: MIPS/T&E: Allocate GVA -> HPA page tables James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 15/30] KVM: MIPS/T&E: Activate GVA page tables in guest context James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 16/30] KVM: MIPS: Support NetLogic KScratch registers James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 17/30] KVM: MIPS: Add fast path TLB refill handler James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 18/30] KVM: MIPS/TLB: Fix off-by-one in TLB invalidate James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 19/30] KVM: MIPS/TLB: Generalise host TLB invalidate to kernel ASID James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 20/30] KVM: MIPS/MMU: Invalidate GVA PTs on ASID changes James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 21/30] KVM: MIPS/MMU: Invalidate stale GVA PTEs on TLBW James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 22/30] KVM: MIPS/MMU: Convert KSeg0 faults to page tables James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 23/30] KVM: MIPS/MMU: Convert TLB mapped " James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 24/30] KVM: MIPS/MMU: Convert commpage fault handling " James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 25/30] KVM: MIPS: Drop vm_init() callback James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 26/30] KVM: MIPS: Use uaccess to read/modify guest instructions James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 27/30] KVM: MIPS/Emulate: Fix CACHE emulation for EVA hosts James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 28/30] KVM: MIPS/TLB: Drop kvm_local_flush_tlb_all() James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 29/30] KVM: MIPS/Emulate: Drop redundant TLB flushes on exceptions James Hogan
2017-02-02 12:04 ` James Hogan
2017-02-02 12:04 ` [PATCH v2 30/30] KVM: MIPS/MMU: Drop kvm_get_new_mmu_context() James Hogan
2017-02-02 12:04 ` James Hogan
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