diff mbox

[v5,02/12] KVM: hide KVM_MEMSLOT_INVALID from userspace

Message ID 5020E481.1050203@linux.vnet.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Xiao Guangrong Aug. 7, 2012, 9:48 a.m. UTC
Quote Avi's comment:
| KVM_MEMSLOT_INVALID is actually an internal symbol, not used by
| userspace.  Please move it to kvm_host.h.

Also, move KVM_MEMSLOT_INVALID to the highest bit

Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
---
 include/linux/kvm.h      |    1 -
 include/linux/kvm_host.h |    2 ++
 2 files changed, 2 insertions(+), 1 deletions(-)

Comments

Marcelo Tosatti Aug. 9, 2012, 6:48 p.m. UTC | #1
On Tue, Aug 07, 2012 at 05:48:49PM +0800, Xiao Guangrong wrote:
> Quote Avi's comment:
> | KVM_MEMSLOT_INVALID is actually an internal symbol, not used by
> | userspace.  Please move it to kvm_host.h.
> 
> Also, move KVM_MEMSLOT_INVALID to the highest bit
> 
> Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
> ---
>  include/linux/kvm.h      |    1 -
>  include/linux/kvm_host.h |    2 ++
>  2 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/include/linux/kvm.h b/include/linux/kvm.h
> index 2ce09aa..dc3aa2a 100644
> --- a/include/linux/kvm.h
> +++ b/include/linux/kvm.h
> @@ -103,7 +103,6 @@ struct kvm_userspace_memory_region {
> 
>  /* for kvm_memory_region::flags */
>  #define KVM_MEM_LOG_DIRTY_PAGES  1UL
> -#define KVM_MEMSLOT_INVALID      (1UL << 1)
> 
>  /* for KVM_IRQ_LINE */
>  struct kvm_irq_level {
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index d2b897e..4c2da5a 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -35,6 +35,8 @@
>  #define KVM_MMIO_SIZE 8
>  #endif
> 
> +#define KVM_MEMSLOT_INVALID	(1UL << 31)
> +
>  /*
>   * If we support unaligned MMIO, at most one fragment will be split into two:
>   */

Please document which range is for userspace visible flags, which range
is reserved. Mention that in both headers, point to each other
("userspace definitions are there" / "internal definitions are there").

16/16 bits for each should be fine.


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Xiao Guangrong Aug. 10, 2012, 2:11 a.m. UTC | #2
On 08/10/2012 02:48 AM, Marcelo Tosatti wrote:

>> +#define KVM_MEMSLOT_INVALID	(1UL << 31)
>> +
>>  /*
>>   * If we support unaligned MMIO, at most one fragment will be split into two:
>>   */
> 
> Please document which range is for userspace visible flags, which range
> is reserved. Mention that in both headers, point to each other
> ("userspace definitions are there" / "internal definitions are there").
> 
> 16/16 bits for each should be fine.

Okay, good to me, will do it in the next version, thank you, Marcelo!


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diff mbox

Patch

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 2ce09aa..dc3aa2a 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -103,7 +103,6 @@  struct kvm_userspace_memory_region {

 /* for kvm_memory_region::flags */
 #define KVM_MEM_LOG_DIRTY_PAGES  1UL
-#define KVM_MEMSLOT_INVALID      (1UL << 1)

 /* for KVM_IRQ_LINE */
 struct kvm_irq_level {
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index d2b897e..4c2da5a 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -35,6 +35,8 @@ 
 #define KVM_MMIO_SIZE 8
 #endif

+#define KVM_MEMSLOT_INVALID	(1UL << 31)
+
 /*
  * If we support unaligned MMIO, at most one fragment will be split into two:
  */