diff options
| author | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-01-29 17:02:17 +0000 |
|---|---|---|
| committer | aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-01-29 17:02:17 +0000 |
| commit | dd5e3b1771b7c528690f2c0714c8e88be07c9bc2 (patch) | |
| tree | 33304f22667c8e87cdce88e90c357824ecc4e331 /target-i386/op_helper.c | |
| parent | 7625162ca4e7be6359571d98b1c9e983393e9d91 (diff) | |
MTRR support on x86, part 2 (Carl-Daniel Hailfinger)
Load and save MTRR state together with machine state.
Add support for the MTRRcap MSR which is used by the latest Bochs BIOS
and some operating systems.
Fix a typo in ext2_feature_name.
With this patch, MTRR emulation should be good enough to not trigger any
sanity checks in well behaved BIOS/kernel code.
Some corner cases for BIOS/firmware usage remain to be implemented, but
that can be deferred to another patch.
Also, MTRR accesses on hardware not supporting MTRRs should cause #GP.
That can be enforced by another patch as well.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6472 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-i386/op_helper.c')
| -rw-r--r-- | target-i386/op_helper.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target-i386/op_helper.c b/target-i386/op_helper.c index 8cf3bb2d8e..0584bd493c 100644 --- a/target-i386/op_helper.c +++ b/target-i386/op_helper.c @@ -3215,6 +3215,13 @@ void helper_rdmsr(void) case MSR_MTRRdefType: val = env->mtrr_deftype; break; + case MSR_MTRRcap: + if (env->cpuid_features & CPUID_MTRR) + val = MSR_MTRRcap_VCNT | MSR_MTRRcap_FIXRANGE_SUPPORT | MSR_MTRRcap_WC_SUPPORTED; + else + /* XXX: exception ? */ + val = 0; + break; default: /* XXX: exception ? */ val = 0; |