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Commit 7b7e3952 authored by Ken Hofsass's avatar Ken Hofsass Committed by Radim Krčmář
Browse files

KVM: x86: add SYNC_REGS_SIZE_BYTES #define. 



Replace hardcoded padding size value for struct kvm_sync_regs
with #define SYNC_REGS_SIZE_BYTES.

Also update the value specified in api.txt from outdated hardcoded
value to SYNC_REGS_SIZE_BYTES.

Signed-off-by: default avatarKen Hofsass <hofsass@google.com>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Acked-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
parent faeb7833

Documentation/virtual/kvm/api.txt

+1 −1
Original line number Diff line number Diff line
@@ -3905,7 +3905,7 @@ in userspace. 
	__u64 kvm_dirty_regs;

	union {

		struct kvm_sync_regs regs;

		char padding[1024];

		char padding[SYNC_REGS_SIZE_BYTES];

	} s;



If KVM_CAP_SYNC_REGS is defined, these fields allow userspace to access

include/uapi/linux/kvm.h

+5 −1
Original line number Diff line number Diff line
@@ -396,6 +396,10 @@ struct kvm_run { 
		char padding[256];

	};



	/* 2048 is the size of the char array used to bound/pad the size

	 * of the union that holds sync regs.

	 */

	#define SYNC_REGS_SIZE_BYTES 2048

	/*

	 * shared registers between kvm and userspace.

	 * kvm_valid_regs specifies the register classes set by the host
@@ -407,7 +411,7 @@ struct kvm_run { 
	__u64 kvm_dirty_regs;

	union {

		struct kvm_sync_regs regs;

		char padding[2048];

		char padding[SYNC_REGS_SIZE_BYTES];

	} s;

};