From: Like Xu <like.xu.linux@gmail.com>
To: Eduardo Habkost <ehabkost@redhat.com>, Joerg Roedel <joro@8bytes.org>
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Vitaly Kuznetsov" <vkuznets@redhat.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
qemu-devel@nongnu.org,
"Philippe Mathieu-Daudé" <philmd@redhat.com>
Subject: [PATCH] target/i386/cpu: Use the KVM reported value for the number of ASIDs
Date: Thu, 15 Jul 2021 18:39:45 +0800 [thread overview]
Message-ID: <20210715103945.95004-1-likexu@tencent.com> (raw)
From: Like Xu <likexu@tencent.com>
If KVM is enabled, use the supported number of address space identifiers
(ASIDs) by the CPUID Fn8000_000A_EBX instead of hard-coding it to 0x10.
Signed-off-by: Like Xu <likexu@tencent.com>
---
target/i386/cpu.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 48b55ebd0a..959c4425a4 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -5523,7 +5523,13 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
case 0x8000000A:
if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
*eax = 0x00000001; /* SVM Revision */
- *ebx = 0x00000010; /* nr of ASIDs */
+ /* nr of ASIDs */
+ if (kvm_enabled()) {
+ *ebx = kvm_arch_get_supported_cpuid(cs->kvm_state,
+ 0x8000000A, 0, R_EBX);
+ } else {
+ *ebx = 0x00000010;
+ }
*ecx = 0;
*edx = env->features[FEAT_SVM]; /* optional features */
} else {
--
2.32.0
reply other threads:[~2021-07-15 13:21 UTC|newest]
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