[Xen-devel] [PATCH 1/3] x86/hvm: Revert 80ecb40362365ba77e68fc609de8bd3b7208ae19

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

The Solaris bug that commit 80ecb40362365ba77e68fc609de8bd3b7208ae19 addressed
has been fixed and backported to earlier releases.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
---
 xen/arch/x86/traps.c |   11 ++---------
 1 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index c462317..d8f83a0 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -677,23 +677,16 @@ int cpuid_hypervisor_leaves( uint32_t idx, uint32_t 
sub_idx,
     struct domain *d = current->domain;
     /* Optionally shift out of the way of Viridian architectural leaves. */
     uint32_t base = is_viridian_domain(d) ? 0x40000100 : 0x40000000;
-    uint32_t limit;
 
     idx -= base;
 
-    /*
-     * Some Solaris PV drivers fail if max > base + 2. Help them out by
-     * hiding the PVRDTSCP leaf if PVRDTSCP is disabled.
-     */
-    limit = (d->arch.tsc_mode < TSC_MODE_PVRDTSCP) ? 2 : 3;
-
-    if ( idx > limit ) 
+    if ( idx > 3 ) 
         return 0;
 
     switch ( idx )
     {
     case 0:
-        *eax = base + limit; /* Largest leaf */
+        *eax = base + 3; /* Largest leaf */
         *ebx = XEN_CPUID_SIGNATURE_EBX;
         *ecx = XEN_CPUID_SIGNATURE_ECX;
         *edx = XEN_CPUID_SIGNATURE_EDX;
-- 
1.7.1


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