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[v2,07/13] x86/domctl: Map/unmap xsave area in arch_get_info_guest()

Message ID 20241105143310.28301-8-alejandro.vallejo@cloud.com (mailing list archive)
State New
Headers show
Series x86: Address Space Isolation FPU preparations | expand

Commit Message

Alejandro Vallejo Nov. 5, 2024, 2:33 p.m. UTC 
No functional change.

Signed-off-by: Alejandro Vallejo <alejandro.vallejo@cloud.com>
---
v2:
  * No change
---
 xen/arch/x86/domctl.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
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Patch

diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index 5f01111619da..3044f706de1c 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -1377,16 +1377,17 @@  void arch_get_info_guest(struct vcpu *v, vcpu_guest_context_u c)
     unsigned int i;
     const struct domain *d = v->domain;
     bool compat = is_pv_32bit_domain(d);
+    const struct xsave_struct *xsave_area;
 #ifdef CONFIG_COMPAT
 #define c(fld) (!compat ? (c.nat->fld) : (c.cmp->fld))
 #else
 #define c(fld) (c.nat->fld)
 #endif
 
-    BUILD_BUG_ON(sizeof(c.nat->fpu_ctxt) !=
-                 sizeof(v->arch.xsave_area->fpu_sse));
-    memcpy(&c.nat->fpu_ctxt, &v->arch.xsave_area->fpu_sse,
-           sizeof(c.nat->fpu_ctxt));
+    xsave_area = VCPU_MAP_XSAVE_AREA(v);
+    BUILD_BUG_ON(sizeof(c.nat->fpu_ctxt) != sizeof(xsave_area->fpu_sse));
+    memcpy(&c.nat->fpu_ctxt, &xsave_area->fpu_sse, sizeof(c.nat->fpu_ctxt));
+    VCPU_UNMAP_XSAVE_AREA(v, xsave_area);
 
     if ( is_pv_domain(d) )
         c(flags = v->arch.pv.vgc_flags & ~(VGCF_i387_valid|VGCF_in_kernel));