OvmfPkg/XenBusDxe: Add XenStore client implementation
XenStore is a key/value database, which is running on another virtual machine. It can be accessed through shared memory. This is a client implementation. Change in V3: - moving xs_wire.h from patch #1 to this patch - fix return value of XenStoreListDirectory - Use a timeout to print a debug message if the other side of the xenstore ring does not notify through the event channel. This is done with the new XenStoreWaitForEvent function. - Have XenStoreReadReply check status of XenStoreProcessMessage and return an error if needed. - Have XenStoreTalkv return the status of XenStoreReadReply. - Have a loop to check for the quiescent of the response ring in the XenStoreInitComms function. (with a timeout of 5 seconds) - use the recently introduced XenStore 'closing' feature. Change in V2: - Change comment style, from freebsd to ovmf - Fix type of EventChannel - Fix debug print, no more cast - Implement XenStoreDeinit. - Clean up comments - Fix few codding style issue - Add FAIL xenstore status value. Origin: FreeBSD 10.0 License: This patch adds several files under the MIT licence. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Jordan Justen <jordan.l.justen@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16267 6f19259b-4bc3-4df7-8a09-765794883524
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@@ -32,6 +32,35 @@
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///
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typedef struct _XENBUS_PROTOCOL XENBUS_PROTOCOL;
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typedef enum xenbus_state XenBusState;
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typedef struct
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{
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UINT32 Id;
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} XENSTORE_TRANSACTION;
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#define XST_NIL ((XENSTORE_TRANSACTION) { 0 })
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typedef enum {
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XENSTORE_STATUS_SUCCESS = 0,
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XENSTORE_STATUS_FAIL,
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XENSTORE_STATUS_EINVAL,
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XENSTORE_STATUS_EACCES,
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XENSTORE_STATUS_EEXIST,
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XENSTORE_STATUS_EISDIR,
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XENSTORE_STATUS_ENOENT,
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XENSTORE_STATUS_ENOMEM,
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XENSTORE_STATUS_ENOSPC,
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XENSTORE_STATUS_EIO,
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XENSTORE_STATUS_ENOTEMPTY,
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XENSTORE_STATUS_ENOSYS,
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XENSTORE_STATUS_EROFS,
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XENSTORE_STATUS_EBUSY,
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XENSTORE_STATUS_EAGAIN,
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XENSTORE_STATUS_EISCONN,
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XENSTORE_STATUS_E2BIG
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} XENSTORE_STATUS;
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#include <IndustryStandard/Xen/grant_table.h>
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