The CPUIDs for Centaur are added, and then the features of
PadLock hardware engine on VIA CPU, such as "ace", "ace_en"
and so on, can be passed into the kvm guest.
Signed-off-by: BrillyWu<brillywu@xxxxxxxxxxxxxx>
Signed-off-by: KaryJin<karyjin@xxxxxxxxxxxxxx>
---
arch/x86/kvm/x86.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
--- a/arch/x86/kvm/x86.c 2011-04-12 10:16:07.713785938 +0800
+++ b/arch/x86/kvm/x86.c 2011-04-14 11:23:34.673820989 +0800
@@ -2331,6 +2331,12 @@ static void do_cpuid_ent(struct kvm_cpui
F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP) |
0 /* SKINIT, WDT, LWP */ | F(FMA4) | F(TBM);
+ /* cpuid 0xC0000001.edx */
+ const u32 kvm_supported_word5_x86_features =
+ F(XSTORE) | F(XSTORE_EN) | F(XCRYPT) | F(XCRYPT_EN) |
+ F(ACE2) | F(ACE2_EN) | F(PHE) | F(PHE_EN) |
+ F(PMM) | F(PMM_EN);
+
/* all calls to cpuid_count() should be made on the same cpu */
get_cpu();
do_cpuid_1_ent(entry, function, index);
@@ -2440,6 +2446,20 @@ static void do_cpuid_ent(struct kvm_cpui
entry->ecx &= kvm_supported_word6_x86_features;
cpuid_mask(&entry->ecx, 6);
break;
+ /*Add support for Centaur's CPUID instruction*/
+ case 0xC0000000:
+ /*Just support up to 0xC0000004 now*/
+ entry->eax = min(entry->eax, 0xC0000004);
+ break;
+ case 0xC0000001:
+ entry->edx &= kvm_supported_word5_x86_features;
+ cpuid_mask(&entry->edx, 5);
+ break;
+ case 0xC0000002:
+ case 0xC0000003:
+ case 0xC0000004:
+ /*Now nothing to do, reserved for the future*/
+ break;
}
kvm_x86_ops->set_supported_cpuid(function, entry);
@@ -2486,6 +2506,26 @@ static int kvm_dev_ioctl_get_supported_c
if (nent >= cpuid->nent)
goto out_free;
+ /* Add support for Centaur's CPUID instruction. */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR) {
+ do_cpuid_ent(&cpuid_entries[nent], 0xC0000000, 0,
+ &nent, cpuid->nent);
+
+ r = -E2BIG;
+ if (nent >= cpuid->nent)
+ goto out_free;
+
+ limit = cpuid_entries[nent - 1].eax;
+ for (func = 0xC0000001;
+ func <= limit && nent < cpuid->nent; ++func)
+ do_cpuid_ent(&cpuid_entries[nent], func, 0,
+ &nent, cpuid->nent);
+
+ r = -E2BIG;
+ if (nent >= cpuid->nent)
+ goto out_free;
+ }
+
do_cpuid_ent(&cpuid_entries[nent], KVM_CPUID_SIGNATURE, 0, &nent,
cpuid->nent);
--
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