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KVM: selftests: Drop manual XCR0 configuration from AMX test

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Now that CR4.OSXSAVE and XCR0 are setup by default, drop the manual
enabling of OXSAVE and XTILE from the AMX test.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/20241003234337.273364-9-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-10-03 16:43:34 -07:00
parent 3678c7f611
commit d87331890a
1 changed files with 4 additions and 19 deletions
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23
tools/testing/selftests/kvm/x86_64/amx_test.c
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@ -86,6 +86,8 @@ static inline void __xsavec(struct xstate *xstate, uint64_t rfbm)
static void check_xtile_info(void)
{
GUEST_ASSERT((xgetbv(0) & XFEATURE_MASK_XTILE) == XFEATURE_MASK_XTILE);
GUEST_ASSERT(this_cpu_has_p(X86_PROPERTY_XSTATE_MAX_SIZE_XCR0));
GUEST_ASSERT(this_cpu_property(X86_PROPERTY_XSTATE_MAX_SIZE_XCR0) <= XSAVE_SIZE);
@ -122,29 +124,12 @@ static void set_tilecfg(struct tile_config *cfg)
}
}
static void init_regs(void)
{
uint64_t cr4, xcr0;
GUEST_ASSERT(this_cpu_has(X86_FEATURE_XSAVE));
/* turn on CR4.OSXSAVE */
cr4 = get_cr4();
cr4 |= X86_CR4_OSXSAVE;
set_cr4(cr4);
GUEST_ASSERT(this_cpu_has(X86_FEATURE_OSXSAVE));
xcr0 = xgetbv(0);
xcr0 |= XFEATURE_MASK_XTILE;
xsetbv(0x0, xcr0);
GUEST_ASSERT((xgetbv(0) & XFEATURE_MASK_XTILE) == XFEATURE_MASK_XTILE);
}
static void __attribute__((__flatten__)) guest_code(struct tile_config *amx_cfg,
struct tile_data *tiledata,
struct xstate *xstate)
{
init_regs();
GUEST_ASSERT(this_cpu_has(X86_FEATURE_XSAVE) &&
this_cpu_has(X86_FEATURE_OSXSAVE));
check_xtile_info();
GUEST_SYNC(1);