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author | Keir Fraser <keir.fraser@citrix.com> | 2008-05-13 09:58:18 +0100 |
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committer | Keir Fraser <keir.fraser@citrix.com> | 2008-05-13 09:58:18 +0100 |
commit | da6d5145a540b2a473218507c8187ec709235a14 (patch) | |
tree | 83f146f2824d4f3827d49a00f644aa927ba42830 /tools/examples | |
parent | be2dc0b64280e165226ff1600c17ea4756dc03f2 (diff) | |
download | xen-da6d5145a540b2a473218507c8187ec709235a14.tar.gz xen-da6d5145a540b2a473218507c8187ec709235a14.tar.bz2 xen-da6d5145a540b2a473218507c8187ec709235a14.zip |
Add extra CPUID config examples to sample HVM config file.
From: Jean Guyader <jean.guyader@eu.citrix.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Diffstat (limited to 'tools/examples')
-rw-r--r-- | tools/examples/xmexample.hvm | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/tools/examples/xmexample.hvm b/tools/examples/xmexample.hvm index 0052c9a053..30b84b6748 100644 --- a/tools/examples/xmexample.hvm +++ b/tools/examples/xmexample.hvm @@ -223,17 +223,54 @@ serial='pty' #----------------------------------------------------------------------------- # Configure guest CPUID responses: -#cpuid=[ '1:ecx=xxxxxxxxxxxxxxxxxxxxxxxxxx1xxxxx, +# +#cpuid=[ '1:ecx=xxxxxxxxxxx00xxxxxxxxxxxxxxxxxxx, # eax=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' ] -# - Set the VMX feature flag in the guest (CPUID_1:ECX:5) +# - Unset the SSE4 features (CPUID.1[ECX][20-19]) # - Default behaviour for all other bits in ECX And EAX registers. # # Each successive character represent a lesser-significant bit: # '1' -> force the corresponding bit to 1 # '0' -> force to 0 -# 'x' -> we don't care (default behaviour) +# 'x' -> Get a safe value (pass through and mask with the default policy) # 'k' -> pass through the host bit value # 's' -> as 'k' but preserve across save/restore and migration +# +# Expose to the guest multi-core cpu instead of multiple processors +# Example for intel, expose a 8-core processor : +#cpuid=['1:edx=xxx1xxxxxxxxxxxxxxxxxxxxxxxxxxxx, +# ebx=xxxxxxxx00010000xxxxxxxxxxxxxxxx', +# '4,0:eax=001111xxxxxxxxxxxxxxxxxxxxxxxxxx'] +# - CPUID.1[EDX][HT] : Enable HT +# - CPUID.1[EBX] : Number of vcpus * 2 +# - CPUID.4,0[EAX] : Number of vcpus * 2 - 1 +#vcpus=8 +# +# Example for amd, expose a 5-core processor : +# cpuid = ['1:ebx=xxxxxxxx00000001xxxxxxxxxxxxxxxx, +# edx=xxx1xxxxxxxxxxxxxxxxxxxxxxxxxxxx', +# '0x80000008:ecx=xxxxxxxxxxxxxxxx0000xxxx00001010'] +# - CPUID.1[EBX] : (Thread * Cores ) per processors +# - CPUID.1[EDX][HT] : Enable HT +# - CPUID.0x80000008[ECX] : Number of vcpus * 2 +#vcpus=5 +# +# Downgrade the cpuid to make a better compatibility for migration : +# Look like a PIII : +# cpuid = [ '0:eax=0x3', +# '1:eax=0x06b1, +# ecx=xxxxxxxxxx0000xx00xxx0000000xx0, +# edx=xx00000xxxxxxx0xxxxxxxxx0xxxxxx', +# '4:eax=0x3,ebx=0x756e6547,ecx=0x6c65746e,edx=0x49656e69', +# '0x80000000:eax=0x3,ebx=0x756e6547,ecx=0x6c65746e,edx=0x49656e69'] +# with the highest leaf +# - CPUID.0[EAX] : Set the highest leaf +# - CPUID.1[EAX] : Pentium III +# - CPUID.1[ECX] : Mask some features +# - CPUID.1[EDX] : Mask some features +# - CPUID.4 : Reply like the highest leaf, in our case CPUID.3 +# - CPUID.0x80000000 : No extension we are on a Pentium III, reply like the +# highest leaf (CPUID.3). # # Configure host CPUID consistency checks, which must be satisfied for this # VM to be allowed to run on this host's processor type: |