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* [PATCH] x86/vPMU: Extend vPMU support to version 5
@ 2021-04-13 17:25 Igor Druzhinin
  2021-04-14 12:28 ` Jan Beulich
  2021-04-25  1:10 ` Tian, Kevin
  0 siblings, 2 replies; 4+ messages in thread
From: Igor Druzhinin @ 2021-04-13 17:25 UTC (permalink / raw)
  To: xen-devel
  Cc: jun.nakajima, kevin.tian, jbeulich, andrew.cooper3, roger.pau,
	wl, Igor Druzhinin

Version 5 is backwards compatible with version 3. This allows to enable
vPMU on Ice Lake CPUs.

Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
---
 xen/arch/x86/cpu/vpmu_intel.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/cpu/vpmu_intel.c b/xen/arch/x86/cpu/vpmu_intel.c
index 6e97ce7..0dfc256 100644
--- a/xen/arch/x86/cpu/vpmu_intel.c
+++ b/xen/arch/x86/cpu/vpmu_intel.c
@@ -839,7 +839,7 @@ int vmx_vpmu_initialise(struct vcpu *v)
         return 0;
 
     if ( v->domain->arch.cpuid->basic.pmu_version <= 1 ||
-         v->domain->arch.cpuid->basic.pmu_version >= 5 )
+         v->domain->arch.cpuid->basic.pmu_version >= 6 )
         return -EINVAL;
 
     if ( (arch_pmc_cnt + fixed_pmc_cnt) == 0 )
@@ -909,8 +909,9 @@ int __init core2_vpmu_init(void)
     switch ( version )
     {
     case 4:
-        printk(XENLOG_INFO "VPMU: PMU version 4 is not fully supported. "
-               "Emulating version 3\n");
+    case 5:
+        printk(XENLOG_INFO "VPMU: PMU version %u is not fully supported. "
+               "Emulating version 3\n", version);
         /* FALLTHROUGH */
 
     case 2:
-- 
2.7.4



^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2021-04-25  1:10 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-04-13 17:25 [PATCH] x86/vPMU: Extend vPMU support to version 5 Igor Druzhinin
2021-04-14 12:28 ` Jan Beulich
2021-04-15 11:29   ` Jan Beulich
2021-04-25  1:10 ` Tian, Kevin

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