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target-i386: implement PKE for TCG

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Tested with kvm-unit-tests.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-02-09 14:14:28 +01:00
parent cf7cc9291b
commit 0f70ed4759
7 changed files with 110 additions and 5 deletions
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27
target-i386/fpu_helper.c
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@ -1184,6 +1184,11 @@ static void do_xsave_bndcsr(CPUX86State *env, target_ulong addr, uintptr_t ra)
cpu_stq_data_ra(env, addr + 8, env->bndcs_regs.sts, ra);
}
static void do_xsave_pkru(CPUX86State *env, target_ulong addr, uintptr_t ra)
{
cpu_stq_data_ra(env, addr, env->pkru, ra);
}
void helper_fxsave(CPUX86State *env, target_ulong ptr)
{
uintptr_t ra = GETPC();
@ -1257,6 +1262,10 @@ static void do_xsave(CPUX86State *env, target_ulong ptr, uint64_t rfbm,
target_ulong off = x86_ext_save_areas[XSTATE_BNDCSR_BIT].offset;
do_xsave_bndcsr(env, ptr + off, ra);
}
if (opt & XSTATE_PKRU_MASK) {
target_ulong off = x86_ext_save_areas[XSTATE_PKRU_BIT].offset;
do_xsave_pkru(env, ptr + off, ra);
}
/* Update the XSTATE_BV field. */
old_bv = cpu_ldq_data_ra(env, ptr + 512, ra);
@ -1339,6 +1348,11 @@ static void do_xrstor_bndcsr(CPUX86State *env, target_ulong addr, uintptr_t ra)
env->bndcs_regs.sts = cpu_ldq_data_ra(env, addr + 8, ra);
}
static void do_xrstor_pkru(CPUX86State *env, target_ulong addr, uintptr_t ra)
{
env->pkru = cpu_ldq_data_ra(env, addr, ra);
}
void helper_fxrstor(CPUX86State *env, target_ulong ptr)
{
uintptr_t ra = GETPC();
@ -1438,6 +1452,19 @@ void helper_xrstor(CPUX86State *env, target_ulong ptr, uint64_t rfbm)
}
cpu_sync_bndcs_hflags(env);
}
if (rfbm & XSTATE_PKRU_MASK) {
uint64_t old_pkru = env->pkru;
if (xstate_bv & XSTATE_PKRU_MASK) {
target_ulong off = x86_ext_save_areas[XSTATE_PKRU_BIT].offset;
do_xrstor_pkru(env, ptr + off, ra);
} else {
env->pkru = 0;
}
if (env->pkru != old_pkru) {
CPUState *cs = CPU(x86_env_get_cpu(env));
tlb_flush(cs, 1);
}
}
}
uint64_t helper_xgetbv(CPUX86State *env, uint32_t ecx)