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[PULL 04/17] i386/cpu: Update how the EBX register of CPUID 0x8000001F i
From: |
Paolo Bonzini |
Subject: |
[PULL 04/17] i386/cpu: Update how the EBX register of CPUID 0x8000001F is set |
Date: |
Sat, 29 Apr 2023 14:16:23 +0200 |
From: Tom Lendacky <thomas.lendacky@amd.com>
Update the setting of CPUID 0x8000001F EBX to clearly document the ranges
associated with fields being set.
Fixes: 6cb8f2a663 ("cpu/i386: populate CPUID 0x8000_001F when SEV is active")
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id:
<5822fd7d02b575121380e1f493a8f6d9eba2b11a.1664550870.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/cpu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 2e30e348a176..73dd99374abe 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -6000,8 +6000,8 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
if (sev_enabled()) {
*eax = 0x2;
*eax |= sev_es_enabled() ? 0x8 : 0;
- *ebx = sev_get_cbit_position();
- *ebx |= sev_get_reduced_phys_bits() << 6;
+ *ebx = sev_get_cbit_position() & 0x3f; /* EBX[5:0] */
+ *ebx |= (sev_get_reduced_phys_bits() & 0x3f) << 6; /* EBX[11:6] */
}
break;
default:
--
2.40.0
- [PULL 00/17] Misc patches for 2023-04-29, Paolo Bonzini, 2023/04/29
- [PULL 01/17] qapi, i386/sev: Change the reduced-phys-bits value from 5 to 1, Paolo Bonzini, 2023/04/29
- [PULL 02/17] qemu-options.hx: Update the reduced-phys-bits documentation, Paolo Bonzini, 2023/04/29
- [PULL 03/17] i386/sev: Update checks and information related to reduced-phys-bits, Paolo Bonzini, 2023/04/29
- [PULL 04/17] i386/cpu: Update how the EBX register of CPUID 0x8000001F is set,
Paolo Bonzini <=
- [PULL 05/17] target/i386: Add support for CMPCCXADD in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 06/17] target/i386: Add support for AMX-FP16 in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 07/17] target/i386: Add support for AVX-IFMA in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 08/17] target/i386: Add support for AVX-VNNI-INT8 in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 10/17] target/i386: Add support for PREFETCHIT0/1 in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 09/17] target/i386: Add support for AVX-NE-CONVERT in CPUID enumeration, Paolo Bonzini, 2023/04/29
- [PULL 12/17] update-linux-headers.sh: Add missing kernel headers., Paolo Bonzini, 2023/04/29
- [PULL 13/17] Update linux headers to v6.3rc5, Paolo Bonzini, 2023/04/29
- [PULL 14/17] tests: vhost-user-test: release mutex on protocol violation, Paolo Bonzini, 2023/04/29
- [PULL 16/17] async: Suppress GCC13 false positive in aio_bh_poll(), Paolo Bonzini, 2023/04/29