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[PATCH v3 04/11] target/i386: do not accept RDSEED if CPUID bit absent
From: |
Paolo Bonzini |
Subject: |
[PATCH v3 04/11] target/i386: do not accept RDSEED if CPUID bit absent |
Date: |
Fri, 23 Jun 2023 15:17:04 +0200 |
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/tcg/translate.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 0de068d4b79..4ef45bbd71e 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -3925,12 +3925,20 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
break;
case 7: /* RDSEED */
+ if (mod != 3 ||
+ (s->prefix & (PREFIX_LOCK | PREFIX_REPZ | PREFIX_REPNZ)) ||
+ !(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_RDSEED)) {
+ goto illegal_op;
+ }
+ goto do_rdrand;
+
case 6: /* RDRAND */
if (mod != 3 ||
(s->prefix & (PREFIX_LOCK | PREFIX_REPZ | PREFIX_REPNZ)) ||
!(s->cpuid_ext_features & CPUID_EXT_RDRAND)) {
goto illegal_op;
}
+ do_rdrand:
translator_io_start(&s->base);
gen_helper_rdrand(s->T0, cpu_env);
rm = (modrm & 7) | REX_B(s);
--
2.41.0
- [PATCH v3 00/11] target/i386: add a few simple features, Paolo Bonzini, 2023/06/23
- [PATCH v3 01/11] target/i386: fix INVD vmexit, Paolo Bonzini, 2023/06/23
- [PATCH v3 02/11] target/i386: TCG supports 3DNow! prefetch(w), Paolo Bonzini, 2023/06/23
- [PATCH v3 05/11] target/i386: TCG supports XSAVEERPTR, Paolo Bonzini, 2023/06/23
- [PATCH v3 03/11] target/i386: TCG supports RDSEED, Paolo Bonzini, 2023/06/23
- [PATCH v3 06/11] target/i386: TCG supports WBNOINVD, Paolo Bonzini, 2023/06/23
- [PATCH v3 04/11] target/i386: do not accept RDSEED if CPUID bit absent,
Paolo Bonzini <=
- [PATCH v3 07/11] target/i386: Intel only supports SYSCALL/SYSRET in long mode, Paolo Bonzini, 2023/06/23
- [PATCH v3 08/11] target/i386: AMD only supports SYSENTER/SYSEXIT in 32-bit mode, Paolo Bonzini, 2023/06/23
- [PATCH v3 09/11] target/i386: sysret and sysexit are privileged, Paolo Bonzini, 2023/06/23
- [PATCH v3 10/11] target/i386: implement RDPID in TCG, Paolo Bonzini, 2023/06/23
- [PATCH v3 11/11] target/i386: implement SYSCALL/SYSRET in 32-bit emulators, Paolo Bonzini, 2023/06/23