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KVM: selftests: Introduce x2APIC register manipulation functions 

Standardize reads and writes of the x2APIC MSRs.

Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Message-Id: <20210604172611.281819-11-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jim Mattson 2021-06-04 10:26:09 -07:00 committed by Paolo Bonzini
parent 4c63c92340
commit 768d134d8c
3 changed files with 14 additions and 5 deletions
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10
tools/testing/selftests/kvm/include/x86_64/apic.h
View File

@ -78,4 +78,14 @@ static inline void xapic_write_reg(unsigned int reg, uint32_t val)
((volatile uint32_t *)APIC_DEFAULT_GPA)[reg >> 2] = val;
}
static inline uint64_t x2apic_read_reg(unsigned int reg)
{
return rdmsr(APIC_BASE_MSR + (reg >> 4));
}
static inline void x2apic_write_reg(unsigned int reg, uint64_t value)
{
wrmsr(APIC_BASE_MSR + (reg >> 4), value);
}
#endif /* SELFTEST_KVM_APIC_H */

5
tools/testing/selftests/kvm/lib/x86_64/apic.c
View File

@ -38,9 +38,8 @@ void xapic_enable(void)
void x2apic_enable(void)
{
uint32_t spiv_reg = APIC_BASE_MSR + (APIC_SPIV >> 4);
wrmsr(MSR_IA32_APICBASE, rdmsr(MSR_IA32_APICBASE) |
MSR_IA32_APICBASE_ENABLE | MSR_IA32_APICBASE_EXTD);
wrmsr(spiv_reg, rdmsr(spiv_reg) | APIC_SPIV_APIC_ENABLED);
x2apic_write_reg(APIC_SPIV,
x2apic_read_reg(APIC_SPIV) | APIC_SPIV_APIC_ENABLED);
}

4
tools/testing/selftests/kvm/x86_64/smm_test.c
View File

@ -55,8 +55,8 @@ static inline void sync_with_host(uint64_t phase)
void self_smi(void)
{
wrmsr(APIC_BASE_MSR + (APIC_ICR >> 4),
APIC_DEST_SELF | APIC_INT_ASSERT | APIC_DM_SMI);
x2apic_write_reg(APIC_ICR,
APIC_DEST_SELF | APIC_INT_ASSERT | APIC_DM_SMI);
}
void guest_code(void *arg)