diff options
Diffstat (limited to 'system/xen/xsa/xsa192.patch')
| -rw-r--r-- | system/xen/xsa/xsa192.patch | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/system/xen/xsa/xsa192.patch b/system/xen/xsa/xsa192.patch deleted file mode 100644 index b573a132c9fde..0000000000000 --- a/system/xen/xsa/xsa192.patch +++ /dev/null @@ -1,64 +0,0 @@ -From: Jan Beulich <jbeulich@suse.com> -Subject: x86/HVM: don't load LDTR with VM86 mode attrs during task switch - -Just like TR, LDTR is purely a protected mode facility and hence needs -to be loaded accordingly. Also move its loading to where it -architecurally belongs. - -This is XSA-192. - -Signed-off-by: Jan Beulich <jbeulich@suse.com> -Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> -Tested-by: Andrew Cooper <andrew.cooper3@citrix.com> - ---- a/xen/arch/x86/hvm/hvm.c -+++ b/xen/arch/x86/hvm/hvm.c -@@ -2728,17 +2728,16 @@ static void hvm_unmap_entry(void *p) - } - - static int hvm_load_segment_selector( -- enum x86_segment seg, uint16_t sel) -+ enum x86_segment seg, uint16_t sel, unsigned int eflags) - { - struct segment_register desctab, cs, segr; - struct desc_struct *pdesc, desc; - u8 dpl, rpl, cpl; - bool_t writable; - int fault_type = TRAP_invalid_tss; -- struct cpu_user_regs *regs = guest_cpu_user_regs(); - struct vcpu *v = current; - -- if ( regs->eflags & X86_EFLAGS_VM ) -+ if ( eflags & X86_EFLAGS_VM ) - { - segr.sel = sel; - segr.base = (uint32_t)sel << 4; -@@ -2986,6 +2985,8 @@ void hvm_task_switch( - if ( rc != HVMCOPY_okay ) - goto out; - -+ if ( hvm_load_segment_selector(x86_seg_ldtr, tss.ldt, 0) ) -+ goto out; - - if ( hvm_set_cr3(tss.cr3, 1) ) - goto out; -@@ -3008,13 +3009,12 @@ void hvm_task_switch( - } - - exn_raised = 0; -- if ( hvm_load_segment_selector(x86_seg_ldtr, tss.ldt) || -- hvm_load_segment_selector(x86_seg_es, tss.es) || -- hvm_load_segment_selector(x86_seg_cs, tss.cs) || -- hvm_load_segment_selector(x86_seg_ss, tss.ss) || -- hvm_load_segment_selector(x86_seg_ds, tss.ds) || -- hvm_load_segment_selector(x86_seg_fs, tss.fs) || -- hvm_load_segment_selector(x86_seg_gs, tss.gs) ) -+ if ( hvm_load_segment_selector(x86_seg_es, tss.es, tss.eflags) || -+ hvm_load_segment_selector(x86_seg_cs, tss.cs, tss.eflags) || -+ hvm_load_segment_selector(x86_seg_ss, tss.ss, tss.eflags) || -+ hvm_load_segment_selector(x86_seg_ds, tss.ds, tss.eflags) || -+ hvm_load_segment_selector(x86_seg_fs, tss.fs, tss.eflags) || -+ hvm_load_segment_selector(x86_seg_gs, tss.gs, tss.eflags) ) - exn_raised = 1; - - rc = hvm_copy_to_guest_virt( |