[PATCH kvm-unit-tests v2 02/12] arm/arm64: add pgtable to thread_info

From: Andrew Jones <drjones@redhat.com>
To: kvm@vger.kernel.org
Cc: pbonzini@redhat.com, rkrcmar@redhat.com, cdall@linaro.org,
	david@redhat.com, lvivier@redhat.com, thuth@redhat.com
Subject: [PATCH kvm-unit-tests v2 02/12] arm/arm64: add pgtable to thread_info
Date: Wed, 17 Jan 2018 11:39:55 +0100	[thread overview]
Message-ID: <20180117104005.29211-3-drjones@redhat.com> (raw)
In-Reply-To: <20180117104005.29211-1-drjones@redhat.com>

Signed-off-by: Andrew Jones <drjones@redhat.com>
---
 lib/arm/asm/thread_info.h | 1 +
 lib/arm/mmu.c             | 5 +++--
 lib/arm/processor.c       | 1 +
 lib/arm/smp.c             | 1 +
 lib/arm64/processor.c     | 1 +
 5 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/arm/asm/thread_info.h b/lib/arm/asm/thread_info.h
index c2ecebb47d5a..80ab3954a6b0 100644
--- a/lib/arm/asm/thread_info.h
+++ b/lib/arm/asm/thread_info.h
@@ -47,6 +47,7 @@ static inline void *thread_stack_alloc(void)
 struct thread_info {
 	int cpu;
 	unsigned int flags;
+	void *pgtable;
 #ifdef __arm__
 	exception_fn exception_handlers[EXCPTN_MAX];
 #else
diff --git a/lib/arm/mmu.c b/lib/arm/mmu.c
index 9e420269f1c0..b9387efe0065 100644
--- a/lib/arm/mmu.c
+++ b/lib/arm/mmu.c
@@ -54,12 +54,13 @@ void mmu_mark_disabled(int cpu)
 extern void asm_mmu_enable(phys_addr_t pgtable);
 void mmu_enable(pgd_t *pgtable)
 {
-	int cpu = current_thread_info()->cpu;
+	struct thread_info *info = current_thread_info();
 
 	asm_mmu_enable(__pa(pgtable));
 	flush_tlb_all();
 
-	mmu_mark_enabled(cpu);
+	info->pgtable = pgtable;
+	mmu_mark_enabled(info->cpu);
 }
 
 extern void asm_mmu_disable(void);
diff --git a/lib/arm/processor.c b/lib/arm/processor.c
index 54fdb87ef019..49e852c06527 100644
--- a/lib/arm/processor.c
+++ b/lib/arm/processor.c
@@ -124,6 +124,7 @@ void start_usr(void (*func)(void *arg), void *arg, unsigned long sp_usr)
 	sp_usr &= (~7UL); /* stack ptr needs 8-byte alignment */
 
 	thread_info_init(thread_info_sp(sp_usr), TIF_USER_MODE);
+	thread_info_sp(sp_usr)->pgtable = current_thread_info()->pgtable;
 
 	asm volatile(
 		"mrs	r0, cpsr\n"
diff --git a/lib/arm/smp.c b/lib/arm/smp.c
index 3c4e307489b2..27f6fcd07109 100644
--- a/lib/arm/smp.c
+++ b/lib/arm/smp.c
@@ -33,6 +33,7 @@ secondary_entry_fn secondary_cinit(void)
 	secondary_entry_fn entry;
 
 	thread_info_init(ti, 0);
+	ti->pgtable = mmu_idmap;
 	mmu_mark_enabled(ti->cpu);
 
 	/*
diff --git a/lib/arm64/processor.c b/lib/arm64/processor.c
index 165980a97d44..96995ccb7733 100644
--- a/lib/arm64/processor.c
+++ b/lib/arm64/processor.c
@@ -238,6 +238,7 @@ void start_usr(void (*func)(void *arg), void *arg, unsigned long sp_usr)
 	sp_usr &= (~15UL); /* stack ptr needs 16-byte alignment */
 
 	__thread_info_init(thread_info_sp(sp_usr), TIF_USER_MODE);
+	thread_info_sp(sp_usr)->pgtable = current_thread_info()->pgtable;
 
 	asm volatile(
 		"mov	x0, %0\n"
-- 
2.13.6
