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authorBrillyWu@viatech.com.cn <BrillyWu@viatech.com.cn>2011-04-25 13:55:15 +0800
committerAvi Kivity <avi@redhat.com>2011-05-22 08:39:55 -0400
commit4429d5dc1197aaf8188e4febcde54d26a51baf6c (patch)
tree5771d9afaa59b319ef6a4058a36cb5d64f6f52f3 /arch/x86/kvm/x86.c
parent2aab2c5b2bac6510b3bd143ca83babee382f4302 (diff)
KVM: Add CPUID support for VIA CPU
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: Brilly Wu <brillywu@viatech.com.cn> Signed-off-by: Kary Jin <karyjin@viatech.com.cn> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
-rw-r--r--arch/x86/kvm/x86.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f5f2d3d44577..22bc69ccf3ef 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2336,6 +2336,12 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
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);
@@ -2445,6 +2451,20 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
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);
@@ -2491,6 +2511,26 @@ static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid,
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);