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sysutils/xen-tools/files/xsa297-4.12-1.patch

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From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: x86/spec-ctrl: Reposition the XPTI command line parsing logic
It has ended up in the middle of the mitigation calculation logic. Move it to
be beside the other command line parsing.
No functional change.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
diff --git a/xen/arch/x86/spec_ctrl.c b/xen/arch/x86/spec_ctrl.c
index 1171c02..99310c8 100644
--- a/xen/arch/x86/spec_ctrl.c
+++ b/xen/arch/x86/spec_ctrl.c
@@ -167,6 +167,73 @@ static int __init parse_spec_ctrl(const char *s)
}
custom_param("spec-ctrl", parse_spec_ctrl);
+int8_t __read_mostly opt_xpti_hwdom = -1;
+int8_t __read_mostly opt_xpti_domu = -1;
+
+static __init void xpti_init_default(uint64_t caps)
+{
+ if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD )
+ caps = ARCH_CAPS_RDCL_NO;
+
+ if ( caps & ARCH_CAPS_RDCL_NO )
+ {
+ if ( opt_xpti_hwdom < 0 )
+ opt_xpti_hwdom = 0;
+ if ( opt_xpti_domu < 0 )
+ opt_xpti_domu = 0;
+ }
+ else
+ {
+ if ( opt_xpti_hwdom < 0 )
+ opt_xpti_hwdom = 1;
+ if ( opt_xpti_domu < 0 )
+ opt_xpti_domu = 1;
+ }
+}
+
+static __init int parse_xpti(const char *s)
+{
+ const char *ss;
+ int val, rc = 0;
+
+ /* Interpret 'xpti' alone in its positive boolean form. */
+ if ( *s == '\0' )
+ opt_xpti_hwdom = opt_xpti_domu = 1;
+
+ do {
+ ss = strchr(s, ',');
+ if ( !ss )
+ ss = strchr(s, '\0');
+
+ switch ( parse_bool(s, ss) )
+ {
+ case 0:
+ opt_xpti_hwdom = opt_xpti_domu = 0;
+ break;
+
+ case 1:
+ opt_xpti_hwdom = opt_xpti_domu = 1;
+ break;
+
+ default:
+ if ( !strcmp(s, "default") )
+ opt_xpti_hwdom = opt_xpti_domu = -1;
+ else if ( (val = parse_boolean("dom0", s, ss)) >= 0 )
+ opt_xpti_hwdom = val;
+ else if ( (val = parse_boolean("domu", s, ss)) >= 0 )
+ opt_xpti_domu = val;
+ else if ( *s )
+ rc = -EINVAL;
+ break;
+ }
+
+ s = ss + 1;
+ } while ( *ss );
+
+ return rc;
+}
+custom_param("xpti", parse_xpti);
+
int8_t __read_mostly opt_pv_l1tf_hwdom = -1;
int8_t __read_mostly opt_pv_l1tf_domu = -1;
@@ -627,73 +694,6 @@ static __init void l1tf_calculations(uint64_t caps)
: (3ul << (paddr_bits - 2))));
}
-int8_t __read_mostly opt_xpti_hwdom = -1;
-int8_t __read_mostly opt_xpti_domu = -1;
-
-static __init void xpti_init_default(uint64_t caps)
-{
- if ( boot_cpu_data.x86_vendor == X86_VENDOR_AMD )
- caps = ARCH_CAPS_RDCL_NO;
-
- if ( caps & ARCH_CAPS_RDCL_NO )
- {
- if ( opt_xpti_hwdom < 0 )
- opt_xpti_hwdom = 0;
- if ( opt_xpti_domu < 0 )
- opt_xpti_domu = 0;
- }
- else
- {
- if ( opt_xpti_hwdom < 0 )
- opt_xpti_hwdom = 1;
- if ( opt_xpti_domu < 0 )
- opt_xpti_domu = 1;
- }
-}
-
-static __init int parse_xpti(const char *s)
-{
- const char *ss;
- int val, rc = 0;
-
- /* Interpret 'xpti' alone in its positive boolean form. */
- if ( *s == '\0' )
- opt_xpti_hwdom = opt_xpti_domu = 1;
-
- do {
- ss = strchr(s, ',');
- if ( !ss )
- ss = strchr(s, '\0');
-
- switch ( parse_bool(s, ss) )
- {
- case 0:
- opt_xpti_hwdom = opt_xpti_domu = 0;
- break;
-
- case 1:
- opt_xpti_hwdom = opt_xpti_domu = 1;
- break;
-
- default:
- if ( !strcmp(s, "default") )
- opt_xpti_hwdom = opt_xpti_domu = -1;
- else if ( (val = parse_boolean("dom0", s, ss)) >= 0 )
- opt_xpti_hwdom = val;
- else if ( (val = parse_boolean("domu", s, ss)) >= 0 )
- opt_xpti_domu = val;
- else if ( *s )
- rc = -EINVAL;
- break;
- }
-
- s = ss + 1;
- } while ( *ss );
-
- return rc;
-}
-custom_param("xpti", parse_xpti);
-
void __init init_speculation_mitigations(void)
{
enum ind_thunk thunk = THUNK_DEFAULT;