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hv: cpu: use the physical address limit from CPUID when available

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Per SDM Vol. 2:

    If CPUID.80000008H:EAX[7:0] is supported, the maximum physical address
    number supported should come from this field.

This patch gets the maximum physical address number from CPUID leaf
0x80000008 and calculates the physical address mask when the leaf is
available.

Currently ACRN does not support platforms w/o this leaf and will panic
on such platforms.

Also call get_cpu_capabilities() earlier since the physical address mask
is required for initializing paging.

Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Junjie Mao
2018-04-04 00:07:21 +08:00
committed by Jack Ren
parent cc975f7858
commit f347d15e7d
4 changed files with 30 additions and 3 deletions
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2
hypervisor/include/arch/x86/cpu.h
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@@ -228,11 +228,13 @@ enum feature_word {
FEAT_8000_0000_EAX, /* CPUID[8000_0000].EAX */
FEAT_8000_0001_ECX, /* CPUID[8000_0001].ECX */
FEAT_8000_0001_EDX, /* CPUID[8000_0001].EDX */
FEAT_8000_0008_EAX, /* CPUID[8000_0008].EAX */
FEATURE_WORDS,
};
struct cpuinfo_x86 {
uint8_t x86, x86_model;
uint64_t physical_address_mask;
uint32_t cpuid_leaves[FEATURE_WORDS];
};