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authorDavid Gibson <david@gibson.dropbear.id.au>2011-10-10 18:31:01 +0000
committerAlexander Graf <agraf@suse.de>2011-10-30 17:11:53 +0100
commit6659394fa1fa20aa640efa42c8fa5ee6994b6286 (patch)
treeff22a1243e72494798b10a61b9464a836c63920a /target-ppc/kvm_ppc.h
parent9bc884b741d3ab5bc3471a5cbccc38480676bf2b (diff)
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pseries: Add device tree properties for VMX/VSX and DFP under kvm
Sufficiently recent PAPR specifications define properties "ibm,vmx" and "ibm,dfp" on the CPU node which advertise whether the VMX vector extensions (or the later VSX version) and/or the Decimal Floating Point operations from IBM's recent POWER CPUs are available. Currently we do not put these in the guest device tree and the guest kernel will consequently assume they are not available. This is good, because they are not supported under TCG. VMX is similar enough to Altivec that it might be trivial to support, but VSX and DFP would both require significant work to support in TCG. However, when running under kvm on a host which supports these instructions, there's no reason not to let the guest use them. This patch, therefore, checks for the relevant support on the host CPU and, if present, advertises them to the guest as well. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc/kvm_ppc.h')
-rw-r--r--target-ppc/kvm_ppc.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/target-ppc/kvm_ppc.h b/target-ppc/kvm_ppc.h
index 87d1bdd..955729a 100644
--- a/target-ppc/kvm_ppc.h
+++ b/target-ppc/kvm_ppc.h
@@ -17,6 +17,8 @@ void kvmppc_init(void);
uint32_t kvmppc_get_tbfreq(void);
uint64_t kvmppc_get_clockfreq(void);
+uint32_t kvmppc_get_vmx(void);
+uint32_t kvmppc_get_dfp(void);
int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len);
int kvmppc_set_interrupt(CPUState *env, int irq, int level);
void kvmppc_set_papr(CPUState *env);
@@ -37,6 +39,16 @@ static inline uint64_t kvmppc_get_clockfreq(void)
return 0;
}
+static inline uint32_t kvmppc_get_vmx(void)
+{
+ return 0;
+}
+
+static inline uint32_t kvmppc_get_dfp(void)
+{
+ return 0;
+}
+
static inline int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len)
{
return -1;