diff mbox series

[08/14] x86/xstate: Map/unmap xsave area in {compress,expand}_xsave_states()

Message ID 20241028154932.6797-9-alejandro.vallejo@cloud.com (mailing list archive)
State New
Headers show
Series x86: Address Space Isolation FPU preparations | expand

Commit Message

Alejandro Vallejo Oct. 28, 2024, 3:49 p.m. UTC 
No functional change.

Signed-off-by: Alejandro Vallejo <alejandro.vallejo@cloud.com>
---
 xen/arch/x86/xstate.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/xen/arch/x86/xstate.c b/xen/arch/x86/xstate.c
index 60e752a245ca..4019ca4aae83 100644
--- a/xen/arch/x86/xstate.c
+++ b/xen/arch/x86/xstate.c
@@ -177,7 +177,7 @@  static void setup_xstate_comp(uint16_t *comp_offsets,
  */
 void expand_xsave_states(const struct vcpu *v, void *dest, unsigned int size)
 {
-    const struct xsave_struct *xstate = v->arch.xsave_area;
+    const struct xsave_struct *xstate = vcpu_map_xsave_area(v);
     const void *src;
     uint16_t comp_offsets[sizeof(xfeature_mask)*8];
     u64 xstate_bv = xstate->xsave_hdr.xstate_bv;
@@ -228,6 +228,8 @@  void expand_xsave_states(const struct vcpu *v, void *dest, unsigned int size)
 
         valid &= ~feature;
     }
+
+    vcpu_unmap_xsave_area(v, xstate);
 }
 
 /*
@@ -242,7 +244,7 @@  void expand_xsave_states(const struct vcpu *v, void *dest, unsigned int size)
  */
 void compress_xsave_states(struct vcpu *v, const void *src, unsigned int size)
 {
-    struct xsave_struct *xstate = v->arch.xsave_area;
+    struct xsave_struct *xstate = vcpu_map_xsave_area(v);
     void *dest;
     uint16_t comp_offsets[sizeof(xfeature_mask)*8];
     u64 xstate_bv, valid;
@@ -294,6 +296,8 @@  void compress_xsave_states(struct vcpu *v, const void *src, unsigned int size)
 
         valid &= ~feature;
     }
+
+    vcpu_unmap_xsave_area(v, xstate);
 }
 
 void xsave(struct vcpu *v, uint64_t mask)