gh0s7/mckernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mcctrl: support remote CPU MSR read/write operations

Browse Source
This commit is contained in:
Balazs Gerofi
2017-05-01 20:24:17 +09:00
parent 2d19ed9391
commit 9992fe0d72
7 changed files with 244 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
arch/x86/kernel/cpu.c
View File

@@ -1834,4 +1834,22 @@ mod_nmi_ctx(void *nmi_ctx, void (*func)())
l[i++] = (unsigned long)(l + 27); // ols rsp
l[i++] = 0x28; // KERNEL DS
}
int arch_cpu_read_write_register(
struct mcctrl_os_cpu_register *desc,
enum mcctrl_os_cpu_operation op)
{
if (op == MCCTRL_OS_CPU_READ_REGISTER) {
desc->val = rdmsr(desc->addr);
}
else if (op == MCCTRL_OS_CPU_WRITE_REGISTER) {
wrmsr(desc->addr, desc->val);
}
else {
return -1;
}
return 0;
}
/*** end of file ***/