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[Qemu-devel] [PATCH v18 4/6] KVM: Move hwpoison page related functions into include/sysemu/kvm_int.h

Xiang Zheng posted 6 patches 6 years, 5 months ago
Maintainers: Eduardo Habkost <ehabkost@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Shannon Zhao <shannon.zhaosl@gmail.com>, Peter Maydell <peter.maydell@linaro.org>, Marcelo Tosatti <mtosatti@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <rth@twiddle.net>, Igor Mammedov <imammedo@redhat.com>
There is a newer version of this series
[Qemu-devel] [PATCH v18 4/6] KVM: Move hwpoison page related functions into include/sysemu/kvm_int.h
Posted by Xiang Zheng 6 years, 5 months ago 
From: Dongjiu Geng <gengdongjiu@huawei.com>

kvm_hwpoison_page_add() and kvm_unpoison_all() will both be used by X86
and ARM platforms, so moving them into "include/sysemu/kvm_int.h" to
avoid duplicate code.

Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
---
 accel/kvm/kvm-all.c      | 33 +++++++++++++++++++++++++++++++++
 include/sysemu/kvm_int.h | 23 +++++++++++++++++++++++
 target/arm/kvm.c         |  3 +++
 target/i386/kvm.c        | 34 ----------------------------------
 4 files changed, 59 insertions(+), 34 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index b09bad0804..c6c052ba57 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -821,6 +821,39 @@ int kvm_vm_check_extension(KVMState *s, unsigned int extension)
     return ret;
 }
 
+typedef struct HWPoisonPage {
+    ram_addr_t ram_addr;
+    QLIST_ENTRY(HWPoisonPage) list;
+} HWPoisonPage;
+
+static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list =
+    QLIST_HEAD_INITIALIZER(hwpoison_page_list);
+
+void kvm_unpoison_all(void *param)
+{
+    HWPoisonPage *page, *next_page;
+
+    QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) {
+        QLIST_REMOVE(page, list);
+        qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE);
+        g_free(page);
+    }
+}
+
+void kvm_hwpoison_page_add(ram_addr_t ram_addr)
+{
+    HWPoisonPage *page;
+
+    QLIST_FOREACH(page, &hwpoison_page_list, list) {
+        if (page->ram_addr == ram_addr) {
+            return;
+        }
+    }
+    page = g_new(HWPoisonPage, 1);
+    page->ram_addr = ram_addr;
+    QLIST_INSERT_HEAD(&hwpoison_page_list, page, list);
+}
+
 static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size)
 {
 #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h
index 72b2d1b3ae..3ad49f9a28 100644
--- a/include/sysemu/kvm_int.h
+++ b/include/sysemu/kvm_int.h
@@ -41,4 +41,27 @@ typedef struct KVMMemoryListener {
 void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
                                   AddressSpace *as, int as_id);
 
+/**
+ * kvm_hwpoison_page_add:
+ *
+ * Parameters:
+ *  @ram_addr: the address in the RAM for the poisoned page
+ *
+ * Add a poisoned page to the list
+ *
+ * Return: None.
+ */
+void kvm_hwpoison_page_add(ram_addr_t ram_addr);
+
+/**
+ * kvm_unpoison_all:
+ *
+ * Parameters:
+ *  @param: some data may be passed to this function
+ *
+ * Free and remove all the poisoned pages in the list
+ *
+ * Return: None.
+ */
+void kvm_unpoison_all(void *param);
 #endif
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index b2eaa50b8d..3a110be7b8 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -20,6 +20,7 @@
 #include "sysemu/sysemu.h"
 #include "sysemu/kvm.h"
 #include "sysemu/kvm_int.h"
+#include "sysemu/reset.h"
 #include "kvm_arm.h"
 #include "cpu.h"
 #include "trace.h"
@@ -195,6 +196,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
 
     cap_has_mp_state = kvm_check_extension(s, KVM_CAP_MP_STATE);
 
+    qemu_register_reset(kvm_unpoison_all, NULL);
+
     return 0;
 }
 
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 8023c679ea..4f9f3682ee 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -476,40 +476,6 @@ uint32_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index)
     return msr_data.entries[0].data;
 }
 
-
-typedef struct HWPoisonPage {
-    ram_addr_t ram_addr;
-    QLIST_ENTRY(HWPoisonPage) list;
-} HWPoisonPage;
-
-static QLIST_HEAD(, HWPoisonPage) hwpoison_page_list =
-    QLIST_HEAD_INITIALIZER(hwpoison_page_list);
-
-static void kvm_unpoison_all(void *param)
-{
-    HWPoisonPage *page, *next_page;
-
-    QLIST_FOREACH_SAFE(page, &hwpoison_page_list, list, next_page) {
-        QLIST_REMOVE(page, list);
-        qemu_ram_remap(page->ram_addr, TARGET_PAGE_SIZE);
-        g_free(page);
-    }
-}
-
-static void kvm_hwpoison_page_add(ram_addr_t ram_addr)
-{
-    HWPoisonPage *page;
-
-    QLIST_FOREACH(page, &hwpoison_page_list, list) {
-        if (page->ram_addr == ram_addr) {
-            return;
-        }
-    }
-    page = g_new(HWPoisonPage, 1);
-    page->ram_addr = ram_addr;
-    QLIST_INSERT_HEAD(&hwpoison_page_list, page, list);
-}
-
 static int kvm_get_mce_cap_supported(KVMState *s, uint64_t *mce_cap,
                                      int *max_banks)
 {
-- 
2.19.1
Re: [Qemu-arm] [PATCH v18 4/6] KVM: Move hwpoison page related functions into include/sysemu/kvm_int.h
Posted by Peter Maydell 6 years, 4 months ago 
On Fri, 6 Sep 2019 at 09:33, Xiang Zheng <zhengxiang9@huawei.com> wrote:
>
> From: Dongjiu Geng <gengdongjiu@huawei.com>
>
> kvm_hwpoison_page_add() and kvm_unpoison_all() will both be used by X86
> and ARM platforms, so moving them into "include/sysemu/kvm_int.h" to
> avoid duplicate code.
>
> Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
> Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
> ---
>  accel/kvm/kvm-all.c      | 33 +++++++++++++++++++++++++++++++++
>  include/sysemu/kvm_int.h | 23 +++++++++++++++++++++++
>  target/arm/kvm.c         |  3 +++
>  target/i386/kvm.c        | 34 ----------------------------------
>  4 files changed, 59 insertions(+), 34 deletions(-)

>  static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size)
>  {
>  #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
> diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h
> index 72b2d1b3ae..3ad49f9a28 100644
> --- a/include/sysemu/kvm_int.h
> +++ b/include/sysemu/kvm_int.h
> @@ -41,4 +41,27 @@ typedef struct KVMMemoryListener {
>  void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
>                                    AddressSpace *as, int as_id);
>
> +/**
> + * kvm_hwpoison_page_add:
> + *
> + * Parameters:
> + *  @ram_addr: the address in the RAM for the poisoned page
> + *
> + * Add a poisoned page to the list
> + *
> + * Return: None.
> + */
> +void kvm_hwpoison_page_add(ram_addr_t ram_addr);
> +
> +/**
> + * kvm_unpoison_all:
> + *
> + * Parameters:
> + *  @param: some data may be passed to this function
> + *
> + * Free and remove all the poisoned pages in the list
> + *
> + * Return: None.
> + */
> +void kvm_unpoison_all(void *param);
>  #endif
> diff --git a/target/arm/kvm.c b/target/arm/kvm.c
> index b2eaa50b8d..3a110be7b8 100644
> --- a/target/arm/kvm.c
> +++ b/target/arm/kvm.c
> @@ -20,6 +20,7 @@
>  #include "sysemu/sysemu.h"
>  #include "sysemu/kvm.h"
>  #include "sysemu/kvm_int.h"
> +#include "sysemu/reset.h"
>  #include "kvm_arm.h"
>  #include "cpu.h"
>  #include "trace.h"
> @@ -195,6 +196,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
>
>      cap_has_mp_state = kvm_check_extension(s, KVM_CAP_MP_STATE);
>
> +    qemu_register_reset(kvm_unpoison_all, NULL);
> +

Rather than registering the same reset handler in
all the architectures, we could register it in the
generic kvm_init() function. (For architectures that
don't use the poison-list functionality the reset handler
will harmlessly do nothing, because there will be nothing
in the list.)

This would allow you to not have to make the
kvm_unpoison_all() function global -- it can be static
in accel/tcg/kvm-all.c.

>      return 0;
>  }

thanks
-- PMM
Re: [Qemu-arm] [PATCH v18 4/6] KVM: Move hwpoison page related functions into include/sysemu/kvm_int.h
Posted by Xiang Zheng 6 years, 4 months ago 

On 2019/9/27 21:19, Peter Maydell wrote:
> On Fri, 6 Sep 2019 at 09:33, Xiang Zheng <zhengxiang9@huawei.com> wrote:
>>
>> From: Dongjiu Geng <gengdongjiu@huawei.com>
>>
>> kvm_hwpoison_page_add() and kvm_unpoison_all() will both be used by X86
>> and ARM platforms, so moving them into "include/sysemu/kvm_int.h" to
>> avoid duplicate code.
>>
>> Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
>> Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
>> ---
>>  accel/kvm/kvm-all.c      | 33 +++++++++++++++++++++++++++++++++
>>  include/sysemu/kvm_int.h | 23 +++++++++++++++++++++++
>>  target/arm/kvm.c         |  3 +++
>>  target/i386/kvm.c        | 34 ----------------------------------
>>  4 files changed, 59 insertions(+), 34 deletions(-)
> 
>>  static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size)
>>  {
>>  #if defined(HOST_WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
>> diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h
>> index 72b2d1b3ae..3ad49f9a28 100644
>> --- a/include/sysemu/kvm_int.h
>> +++ b/include/sysemu/kvm_int.h
>> @@ -41,4 +41,27 @@ typedef struct KVMMemoryListener {
>>  void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
>>                                    AddressSpace *as, int as_id);
>>
>> +/**
>> + * kvm_hwpoison_page_add:
>> + *
>> + * Parameters:
>> + *  @ram_addr: the address in the RAM for the poisoned page
>> + *
>> + * Add a poisoned page to the list
>> + *
>> + * Return: None.
>> + */
>> +void kvm_hwpoison_page_add(ram_addr_t ram_addr);
>> +
>> +/**
>> + * kvm_unpoison_all:
>> + *
>> + * Parameters:
>> + *  @param: some data may be passed to this function
>> + *
>> + * Free and remove all the poisoned pages in the list
>> + *
>> + * Return: None.
>> + */
>> +void kvm_unpoison_all(void *param);
>>  #endif
>> diff --git a/target/arm/kvm.c b/target/arm/kvm.c
>> index b2eaa50b8d..3a110be7b8 100644
>> --- a/target/arm/kvm.c
>> +++ b/target/arm/kvm.c
>> @@ -20,6 +20,7 @@
>>  #include "sysemu/sysemu.h"
>>  #include "sysemu/kvm.h"
>>  #include "sysemu/kvm_int.h"
>> +#include "sysemu/reset.h"
>>  #include "kvm_arm.h"
>>  #include "cpu.h"
>>  #include "trace.h"
>> @@ -195,6 +196,8 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
>>
>>      cap_has_mp_state = kvm_check_extension(s, KVM_CAP_MP_STATE);
>>
>> +    qemu_register_reset(kvm_unpoison_all, NULL);
>> +
> 
> Rather than registering the same reset handler in
> all the architectures, we could register it in the
> generic kvm_init() function. (For architectures that
> don't use the poison-list functionality the reset handler
> will harmlessly do nothing, because there will be nothing
> in the list.)
> 
> This would allow you to not have to make the
> kvm_unpoison_all() function global -- it can be static
> in accel/tcg/kvm-all.c.

OK, I will move the register code into the kvm_init() function.

> 
>>      return 0;
>>  }
> 
> thanks
> -- PMM
> 
> .
> 

-- 

Thanks,
Xiang

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