[xen staging] xen/ioreq: Make x86's hvm_ioreq_needs_completion() common

[patchbot@xxxxxxx]

commit 4607644168597c79b5c350ce326e81f8f27fbc11
Author:     Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
AuthorDate: Fri Jan 29 03:48:33 2021 +0200
Commit:     Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Fri Jan 29 16:18:15 2021 +0000

    xen/ioreq: Make x86's hvm_ioreq_needs_completion() common
    
    The IOREQ is a common feature now and this helper will be used
    on Arm as is. Move it to xen/ioreq.h and remove "hvm" prefix.
    
    Although PIO handling on Arm is not introduced with the current series
    (it will be implemented when we add support for vPCI), technically
    the PIOs exist on Arm (however they are accessed the same way as MMIO)
    and it would be better not to diverge now.
    
    Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
    Reviewed-by: Paul Durrant <paul@xxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>
    Reviewed-by: Alex Bennée <alex.bennee@xxxxxxxxxx>
    CC: Julien Grall <julien.grall@xxxxxxx>
    [On Arm only]
    Tested-by: Wei Chen <Wei.Chen@xxxxxxx>
---
 xen/arch/x86/hvm/emulate.c     | 4 ++--
 xen/arch/x86/hvm/io.c          | 2 +-
 xen/common/ioreq.c             | 4 ++--
 xen/include/asm-x86/hvm/vcpu.h | 7 -------
 xen/include/xen/ioreq.h        | 7 +++++++
 5 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/xen/arch/x86/hvm/emulate.c b/xen/arch/x86/hvm/emulate.c
index 60ca465603..c3487b583b 100644
--- a/xen/arch/x86/hvm/emulate.c
+++ b/xen/arch/x86/hvm/emulate.c
@@ -336,7 +336,7 @@ static int hvmemul_do_io(
             rc = hvm_send_ioreq(s, &p, 0);
             if ( rc != X86EMUL_RETRY || currd->is_shutting_down )
                 vio->io_req.state = STATE_IOREQ_NONE;
-            else if ( !hvm_ioreq_needs_completion(&vio->io_req) )
+            else if ( !ioreq_needs_completion(&vio->io_req) )
                 rc = X86EMUL_OKAY;
         }
         break;
@@ -2649,7 +2649,7 @@ static int _hvm_emulate_one(struct hvm_emulate_ctxt 
*hvmemul_ctxt,
     if ( rc == X86EMUL_OKAY && vio->mmio_retry )
         rc = X86EMUL_RETRY;
 
-    if ( !hvm_ioreq_needs_completion(&vio->io_req) )
+    if ( !ioreq_needs_completion(&vio->io_req) )
         completion = HVMIO_no_completion;
     else if ( completion == HVMIO_no_completion )
         completion = (vio->io_req.type != IOREQ_TYPE_PIO ||
diff --git a/xen/arch/x86/hvm/io.c b/xen/arch/x86/hvm/io.c
index 11e007d3da..ef8286b593 100644
--- a/xen/arch/x86/hvm/io.c
+++ b/xen/arch/x86/hvm/io.c
@@ -135,7 +135,7 @@ bool handle_pio(uint16_t port, unsigned int size, int dir)
 
     rc = hvmemul_do_pio_buffer(port, size, dir, &data);
 
-    if ( hvm_ioreq_needs_completion(&vio->io_req) )
+    if ( ioreq_needs_completion(&vio->io_req) )
         vio->io_completion = HVMIO_pio_completion;
 
     switch ( rc )
diff --git a/xen/common/ioreq.c b/xen/common/ioreq.c
index 4e7d91b79b..61ddd542c2 100644
--- a/xen/common/ioreq.c
+++ b/xen/common/ioreq.c
@@ -160,7 +160,7 @@ static bool hvm_wait_for_io(struct hvm_ioreq_vcpu *sv, 
ioreq_t *p)
     }
 
     p = &sv->vcpu->arch.hvm.hvm_io.io_req;
-    if ( hvm_ioreq_needs_completion(p) )
+    if ( ioreq_needs_completion(p) )
         p->data = data;
 
     sv->pending = false;
@@ -186,7 +186,7 @@ bool handle_hvm_io_completion(struct vcpu *v)
     if ( sv && !hvm_wait_for_io(sv, get_ioreq(s, v)) )
         return false;
 
-    vio->io_req.state = hvm_ioreq_needs_completion(&vio->io_req) ?
+    vio->io_req.state = ioreq_needs_completion(&vio->io_req) ?
         STATE_IORESP_READY : STATE_IOREQ_NONE;
 
     msix_write_completion(v);
diff --git a/xen/include/asm-x86/hvm/vcpu.h b/xen/include/asm-x86/hvm/vcpu.h
index 5ccd075815..6c1feda663 100644
--- a/xen/include/asm-x86/hvm/vcpu.h
+++ b/xen/include/asm-x86/hvm/vcpu.h
@@ -91,13 +91,6 @@ struct hvm_vcpu_io {
     const struct g2m_ioport *g2m_ioport;
 };
 
-static inline bool hvm_ioreq_needs_completion(const ioreq_t *ioreq)
-{
-    return ioreq->state == STATE_IOREQ_READY &&
-           !ioreq->data_is_ptr &&
-           (ioreq->type != IOREQ_TYPE_PIO || ioreq->dir != IOREQ_WRITE);
-}
-
 struct nestedvcpu {
     bool_t nv_guestmode; /* vcpu in guestmode? */
     void *nv_vvmcx; /* l1 guest virtual VMCB/VMCS */
diff --git a/xen/include/xen/ioreq.h b/xen/include/xen/ioreq.h
index 430fc227c9..e957b5286f 100644
--- a/xen/include/xen/ioreq.h
+++ b/xen/include/xen/ioreq.h
@@ -23,6 +23,13 @@
 
 #include <public/hvm/dm_op.h>
 
+static inline bool ioreq_needs_completion(const ioreq_t *ioreq)
+{
+    return ioreq->state == STATE_IOREQ_READY &&
+           !ioreq->data_is_ptr &&
+           (ioreq->type != IOREQ_TYPE_PIO || ioreq->dir != IOREQ_WRITE);
+}
+
 #define HANDLE_BUFIOREQ(s) \
     ((s)->bufioreq_handling != HVM_IOREQSRV_BUFIOREQ_OFF)
 
--
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