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nova: support transfer of IA32_TSC_AUX MSR for vCPUs

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The 32-bit MSR is returned by rdtscp in ecx register and used to detect
the CPU ID the timestamp was taken on.

Issue #4314
This commit is contained in:
Alexander Boettcher
2021-11-02 14:59:15 +01:00
committed by Christian Helmuth
parent f4e52863c0
commit 533015b93e
8 changed files with 105 additions and 29 deletions
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3
repos/base-nova/include/nova/syscall-generic.h
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@@ -316,6 +316,7 @@ namespace Nova {
R8_R15 = 1U << 22, /* R8 .. R15 */
SYSCALL_SWAPGS = 1U << 23, /* SYSCALL and SWAPGS MSRs */
TPR = 1U << 24, /* TPR and TPR threshold */
TSC_AUX = 1U << 25, /* IA32_TSC_AUX used by rdtscp */
FPU = 1U << 31, /* FPU state */
IRQ = EFL | STA | INJ | TSC,
@@ -590,7 +591,7 @@ namespace Nova {
mword_t reserved1;
#endif
} gdtr, idtr;
unsigned long long tsc_val, tsc_off;
unsigned long long tsc_val, tsc_off, tsc_aux;
} __attribute__((packed));
mword_t mr[(4096 - 4 * sizeof(mword_t)) / sizeof(mword_t)];
};