[xen staging] x86/pv: don't populate the GDT/LDT L3 slot at domain creation

[patchbot@xxxxxxx]

commit fcf91ce9de66e167f2779c831501f5ad91d02dfc
Author:     Roger Pau Monné <roger.pau@xxxxxxxxxx>
AuthorDate: Tue Nov 26 11:23:58 2024 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Nov 26 11:23:58 2024 +0100

    x86/pv: don't populate the GDT/LDT L3 slot at domain creation
    
    The current code in pv_domain_initialise() populates the L3 slot used for 
the
    GDT/LDT, however that's not needed, since the create_perdomain_mapping() in
    pv_create_gdt_ldt_l1tab() will already take care of allocating an L2 and
    populating the L3 entry if not present.
    
    No functional change intended.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/pv/domain.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/xen/arch/x86/pv/domain.c b/xen/arch/x86/pv/domain.c
index d5a8564c1c..7aef628f55 100644
--- a/xen/arch/x86/pv/domain.c
+++ b/xen/arch/x86/pv/domain.c
@@ -376,12 +376,6 @@ int pv_domain_initialise(struct domain *d)
          (d->arch.pv.cpuidmasks = xmemdup(&cpuidmask_defaults)) == NULL )
         goto fail;
 
-    rc = create_perdomain_mapping(d, GDT_LDT_VIRT_START,
-                                  GDT_LDT_MBYTES << (20 - PAGE_SHIFT),
-                                  NULL, NULL);
-    if ( rc )
-        goto fail;
-
     d->arch.ctxt_switch = &pv_csw;
 
     if ( !is_pv_32bit_domain(d) && use_invpcid && cpu_has_pcid )
--
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