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KVM: selftests: Better XMM read/write helpers

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set_xmm()/get_xmm() helpers are fairly useless as they only read 64 bits
from 128-bit registers. Moreover, these helpers are not used. Borrow
_kvm_read_sse_reg()/_kvm_write_sse_reg() from KVM limiting them to
XMM0-XMM8 for now.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-31-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov
2022-11-01 15:54:08 +01:00
committed by Paolo Bonzini
parent f4de6a1fa3
commit 676a863ce6
1 changed files with 36 additions and 34 deletions
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70
tools/testing/selftests/kvm/include/x86_64/processor.h
View File

@@ -603,71 +603,73 @@ static inline bool this_pmu_has(struct kvm_x86_pmu_feature feature)
!this_cpu_has(feature.anti_feature);
}
#define SET_XMM(__var, __xmm) \
asm volatile("movq %0, %%"#__xmm : : "r"(__var) : #__xmm)
typedef u32 __attribute__((vector_size(16))) sse128_t;
#define __sse128_u union { sse128_t vec; u64 as_u64[2]; u32 as_u32[4]; }
#define sse128_lo(x) ({ __sse128_u t; t.vec = x; t.as_u64[0]; })
#define sse128_hi(x) ({ __sse128_u t; t.vec = x; t.as_u64[1]; })
static inline void set_xmm(int n, unsigned long val)
static inline void read_sse_reg(int reg, sse128_t *data)
{
switch (n) {
switch (reg) {
case 0:
SET_XMM(val, xmm0);
asm("movdqa %%xmm0, %0" : "=m"(*data));
break;
case 1:
SET_XMM(val, xmm1);
asm("movdqa %%xmm1, %0" : "=m"(*data));
break;
case 2:
SET_XMM(val, xmm2);
asm("movdqa %%xmm2, %0" : "=m"(*data));
break;
case 3:
SET_XMM(val, xmm3);
asm("movdqa %%xmm3, %0" : "=m"(*data));
break;
case 4:
SET_XMM(val, xmm4);
asm("movdqa %%xmm4, %0" : "=m"(*data));
break;
case 5:
SET_XMM(val, xmm5);
asm("movdqa %%xmm5, %0" : "=m"(*data));
break;
case 6:
SET_XMM(val, xmm6);
asm("movdqa %%xmm6, %0" : "=m"(*data));
break;
case 7:
SET_XMM(val, xmm7);
asm("movdqa %%xmm7, %0" : "=m"(*data));
break;
default:
BUG();
}
}
#define GET_XMM(__xmm) \
({ \
unsigned long __val; \
asm volatile("movq %%"#__xmm", %0" : "=r"(__val)); \
__val; \
})
static inline unsigned long get_xmm(int n)
static inline void write_sse_reg(int reg, const sse128_t *data)
{
assert(n >= 0 && n <= 7);
switch (n) {
switch (reg) {
case 0:
return GET_XMM(xmm0);
asm("movdqa %0, %%xmm0" : : "m"(*data));
break;
case 1:
return GET_XMM(xmm1);
asm("movdqa %0, %%xmm1" : : "m"(*data));
break;
case 2:
return GET_XMM(xmm2);
asm("movdqa %0, %%xmm2" : : "m"(*data));
break;
case 3:
return GET_XMM(xmm3);
asm("movdqa %0, %%xmm3" : : "m"(*data));
break;
case 4:
return GET_XMM(xmm4);
asm("movdqa %0, %%xmm4" : : "m"(*data));
break;
case 5:
return GET_XMM(xmm5);
asm("movdqa %0, %%xmm5" : : "m"(*data));
break;
case 6:
return GET_XMM(xmm6);
asm("movdqa %0, %%xmm6" : : "m"(*data));
break;
case 7:
return GET_XMM(xmm7);
asm("movdqa %0, %%xmm7" : : "m"(*data));
break;
default:
BUG();
}
/* never reached */
return 0;
}
static inline void cpu_relax(void)