1 files changed, 0 insertions, 59 deletions
diff --git a/system/xen/xsa/xsa244.patch b/system/xen/xsa/xsa244.patch
deleted file mode 100644
index c35a80be32f1..000000000000
--- a/system/xen/xsa/xsa244.patch
+++ /dev/null
@@ -1,59 +0,0 @@
-From: Andrew Cooper <andrew.cooper3@citrix.com>
-Subject: [PATCH] x86/cpu: Fix IST handling during PCPU bringup
-
-Clear IST references in newly allocated IDTs.  Nothing good will come of
-having them set before the TSS is suitably constructed (although the chances
-of the CPU surviving such an IST interrupt/exception is extremely slim).
-
-Uniformly set the IST references after the TSS is in place.  This fixes an
-issue on AMD hardware, where onlining a PCPU while PCPU0 is in HVM context
-will cause IST_NONE to be copied into the new IDT, making that PCPU vulnerable
-to privilege escalation from PV guests until it subsequently schedules an HVM
-guest.
-
-This is XSA-244
-
-Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
-Reviewed-by: Jan Beulich <jbeulich@suse.com>
----
- xen/arch/x86/cpu/common.c | 5 +++++
- xen/arch/x86/smpboot.c    | 3 +++
- 2 files changed, 8 insertions(+)
-
-diff --git a/xen/arch/x86/cpu/common.c b/xen/arch/x86/cpu/common.c
-index 78f5667..6cf3628 100644
---- a/xen/arch/x86/cpu/common.c
-+++ b/xen/arch/x86/cpu/common.c
-@@ -640,6 +640,7 @@ void __init early_cpu_init(void)
-  * - Sets up TSS with stack pointers, including ISTs
-  * - Inserts TSS selector into regular and compat GDTs
-  * - Loads GDT, IDT, TR then null LDT
-+ * - Sets up IST references in the IDT
-  */
- void load_system_tables(void)
- {
-@@ -702,6 +703,10 @@ void load_system_tables(void)
- 	asm volatile ("ltr  %w0" : : "rm" (TSS_ENTRY << 3) );
- 	asm volatile ("lldt %w0" : : "rm" (0) );
- 
-+	set_ist(&idt_tables[cpu][TRAP_double_fault],  IST_DF);
-+	set_ist(&idt_tables[cpu][TRAP_nmi],	      IST_NMI);
-+	set_ist(&idt_tables[cpu][TRAP_machine_check], IST_MCE);
-+
- 	/*
- 	 * Bottom-of-stack must be 16-byte aligned!
- 	 *
-diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
-index 3ca716c..1609b62 100644
---- a/xen/arch/x86/smpboot.c
-+++ b/xen/arch/x86/smpboot.c
-@@ -724,6 +724,9 @@ static int cpu_smpboot_alloc(unsigned int cpu)
-     if ( idt_tables[cpu] == NULL )
-         goto oom;
-     memcpy(idt_tables[cpu], idt_table, IDT_ENTRIES * sizeof(idt_entry_t));
-+    set_ist(&idt_tables[cpu][TRAP_double_fault],  IST_NONE);
-+    set_ist(&idt_tables[cpu][TRAP_nmi],           IST_NONE);
-+    set_ist(&idt_tables[cpu][TRAP_machine_check], IST_NONE);
- 
-     for ( stub_page = 0, i = cpu & ~(STUBS_PER_PAGE - 1);
-           i < nr_cpu_ids && i <= (cpu | (STUBS_PER_PAGE - 1)); ++i )