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[Qemu-devel] [PATCH v2 14/21] cpuid: decrease L2 cache for Intel and add
From: |
Andre Przywara |
Subject: |
[Qemu-devel] [PATCH v2 14/21] cpuid: decrease L2 cache for Intel and add comments |
Date: |
Fri, 18 Sep 2009 13:48:07 +0200 |
The Intel cache info leafs describe a Core2Duo with 4MB L2 Cache.
This is a pretty high value not reached by many host CPUs. So lower
this value to one MB to avoid guests assuming too large caches.
Signed-off-by: Andre Przywara <address@hidden>
---
target-i386/cpuid.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index 9f43ccd..8ec730c 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -716,25 +716,25 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
*eax = 0;
}
switch (count) {
- case 0: /* L1 dcache info */
+ case 0: /* L1 dcache info: 32KB */
*eax |= 0x0000121;
*ebx = 0x1c0003f;
*ecx = 0x000003f;
*edx = 0x0000001;
break;
- case 1: /* L1 icache info */
+ case 1: /* L1 icache info: 32KB */
*eax |= 0x0000122;
*ebx = 0x1c0003f;
*ecx = 0x000003f;
*edx = 0x0000001;
break;
- case 2: /* L2 cache info */
+ case 2: /* L2 cache info: 1024KB */
*eax |= 0x0000143;
if (env->nr_threads > 1) {
*eax |= (env->nr_threads - 1) << 14;
}
*ebx = 0x3c0003f;
- *ecx = 0x0000fff;
+ *ecx = 0x00003ff;
*edx = 0x0000001;
break;
default: /* end of info */
@@ -813,14 +813,14 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
uint32_t count,
*edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
break;
case 0x80000005:
- /* cache info (L1 cache) */
+ /* cache info (L1 cache): 64KB L1D & L1I */
*eax = 0x01ff01ff;
*ebx = 0x01ff01ff;
*ecx = 0x40020140;
*edx = 0x40020140;
break;
case 0x80000006:
- /* cache info (L2 cache) */
+ /* cache info (L2 cache): 512KB L2, no L3 */
*eax = 0;
*ebx = 0x42004200;
*ecx = 0x02008140;
--
1.6.1.3
- [Qemu-devel] [PATCH v2 04/21] cpuid: fix comments, (continued)
- [Qemu-devel] [PATCH v2 04/21] cpuid: fix comments, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 06/21] cpuid: Replace strtok with get_opt_name, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 02/21] cpuid: fix over-long lines, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 07/21] cpuid: add missing CPUID feature flag names, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 10/21] cpuid: simplify CPUID flag search function, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 09/21] cpuid: remove unnecessary kvm_trim function, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 13/21] cpuid: add TCG feature bit trimming, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 08/21] cpuid: list all known x86 CPUID feature flags, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 15/21] cpuid: Adjust feature bit constants, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 16/21] cpuid: Update qemu64/32 CPU models, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 14/21] cpuid: decrease L2 cache for Intel and add comments,
Andre Przywara <=
- [Qemu-devel] [PATCH v2 01/21] cpuid: move CPUID functions into separate file, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 20/21] cpuid: Add kvm32 CPU model, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 12/21] cpuid: Fix multicore setup on Intel, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 05/21] cpuid: moved host_cpuid function and remove prototype, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 17/21] cpuid: Fix CPU models to use new feature set names, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 03/21] cpuid: replace magic number with named constant, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 19/21] cpuid: Add athlon64 CPU model, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 21/21] cpuid: Always expose 32 and 64-bit CPUs, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 18/21] cpuid: Fix 486 CPU model, Andre Przywara, 2009/09/18
- [Qemu-devel] [PATCH v2 11/21] cpuid: propagate further CPUID leafs when -cpu host, Andre Przywara, 2009/09/18