On a Friday in 2020, Jiri Denemark wrote:
CPU models defined in the cpu_map can use signature/@stepping attribute
to match a limited set of stepping numbers. The value is a bitmap for
bits 0..15 each corresponding to a single stepping value. For example,
stepping='4-6,9' will match 4, 5, 6, and 9. Omitting the attribute is
equivalent to stepping='0-15'.
Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
---
src/cpu/cpu_x86.c | 60 +++++++++++++++++++++++++++++++++++++++--------
1 file changed, 50 insertions(+), 10 deletions(-)
diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c
index 51c98efca9..bd224a9d0d 100644
--- a/src/cpu/cpu_x86.c
+++ b/src/cpu/cpu_x86.c
@@ -125,6 +125,7 @@ typedef struct _virCPUx86Signature virCPUx86Signature;
struct _virCPUx86Signature {
unsigned int family;
unsigned int model;
+ virBitmapPtr stepping;
};
typedef struct _virCPUx86Signatures virCPUx86Signatures;
@@ -732,7 +733,17 @@ x86MakeSignature(unsigned int family,
static uint32_t
virCPUx86SignatureToCPUID(virCPUx86Signature *sig)
{
- return x86MakeSignature(sig->family, sig->model, 0);
+ unsigned int stepping = 0;
+
+ if (sig->stepping) {
+ ssize_t fisrtBit;
first?
+ + fisrtBit = virBitmapNextSetBit(sig->stepping, -1); + if (fisrtBit >= 0) + stepping = fisrtBit; + } + + return x86MakeSignature(sig->family, sig->model, stepping); }
Reviewed-by: Ján Tomko <jtomko@xxxxxxxxxx> Jano
Attachment:
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Description: PGP signature
