diff options
Diffstat (limited to 'hwaccess_x86_msr.c')
| -rw-r--r-- | hwaccess_x86_msr.c | 73 |
1 files changed, 50 insertions, 23 deletions
diff --git a/hwaccess_x86_msr.c b/hwaccess_x86_msr.c index 79cf2f82..1fbfa9e9 100644 --- a/hwaccess_x86_msr.c +++ b/hwaccess_x86_msr.c @@ -41,7 +41,7 @@ static int fd_msr = -1; -msr_t rdmsr(int addr) +msr_t msr_read(int addr) { uint32_t buf[2]; msr_t msr = { 0xffffffff, 0xffffffff }; @@ -68,7 +68,7 @@ msr_t rdmsr(int addr) return msr; } -int wrmsr(int addr, msr_t msr) +int msr_write(int addr, msr_t msr) { uint32_t buf[2]; buf[0] = msr.lo; @@ -93,7 +93,7 @@ int wrmsr(int addr, msr_t msr) return 0; } -int setup_cpu_msr(int cpu) +int msr_setup(int cpu) { char msrfilename[64] = { 0 }; snprintf(msrfilename, sizeof(msrfilename), "/dev/cpu/%d/msr", cpu); @@ -114,7 +114,7 @@ int setup_cpu_msr(int cpu) return 0; } -void cleanup_cpu_msr(void) +void msr_cleanup(void) { if (fd_msr == -1) { msg_pinfo("No MSR initialized.\n"); @@ -127,14 +127,19 @@ void cleanup_cpu_msr(void) fd_msr = -1; } #elif defined(__OpenBSD__) && defined (__i386__) /* This does only work for certain AMD Geode LX systems see amdmsr(4). */ +#include <stdlib.h> #include <stdint.h> #include <stdio.h> +#include <string.h> +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> #include <sys/ioctl.h> #include <machine/amdmsr.h> static int fd_msr = -1; -msr_t rdmsr(int addr) +msr_t msr_read(int addr) { struct amdmsr_req args; @@ -154,7 +159,7 @@ msr_t rdmsr(int addr) return msr; } -int wrmsr(int addr, msr_t msr) +int msr_write(int addr, msr_t msr) { struct amdmsr_req args; @@ -170,7 +175,7 @@ int wrmsr(int addr, msr_t msr) return 0; } -int setup_cpu_msr(int cpu) +int msr_setup(int cpu) { char msrfilename[64] = { 0 }; snprintf(msrfilename, sizeof(msrfilename), "/dev/amdmsr"); @@ -190,7 +195,7 @@ int setup_cpu_msr(int cpu) return 0; } -void cleanup_cpu_msr(void) +void msr_cleanup(void) { if (fd_msr == -1) { msg_pinfo("No MSR initialized.\n"); @@ -222,7 +227,7 @@ typedef struct { static int fd_msr = -1; -msr_t rdmsr(int addr) +msr_t msr_read(int addr) { cpu_msr_args_t args; @@ -242,7 +247,7 @@ msr_t rdmsr(int addr) return msr; } -int wrmsr(int addr, msr_t msr) +int msr_write(int addr, msr_t msr) { cpu_msr_args_t args; @@ -258,7 +263,7 @@ int wrmsr(int addr, msr_t msr) return 0; } -int setup_cpu_msr(int cpu) +int msr_setup(int cpu) { char msrfilename[64] = { 0 }; snprintf(msrfilename, sizeof(msrfilename), "/dev/cpu%d", cpu); @@ -279,7 +284,7 @@ int setup_cpu_msr(int cpu) return 0; } -void cleanup_cpu_msr(void) +void msr_cleanup(void) { if (fd_msr == -1) { msg_pinfo("No MSR initialized.\n"); @@ -293,19 +298,41 @@ void cleanup_cpu_msr(void) } #elif defined(__MACH__) && defined(__APPLE__) -/* rdmsr() and wrmsr() are provided by DirectHW which needs neither setup nor cleanup. */ -int setup_cpu_msr(int cpu) +/* + * DirectHW has identical, but conflicting typedef for msr_t. We redefine msr_t + * to directhw_msr_t for DirectHW. + * rdmsr() and wrmsr() are provided by DirectHW and need neither setup nor cleanup. + */ +#define msr_t directhw_msr_t +#include <DirectHW/DirectHW.h> +#undef msr_t + +msr_t msr_read(int addr) +{ + directhw_msr_t msr; + msr = rdmsr(addr); + return (msr_t){msr.hi, msr.lo}; +} + +int msr_write(int addr, msr_t msr) +{ + return wrmsr(addr, (directhw_msr_t){msr.hi, msr.lo}); +} + +int msr_setup(int cpu) { // Always succeed for now return 0; } -void cleanup_cpu_msr(void) +void msr_cleanup(void) { // Nothing, yet. } #elif defined(__LIBPAYLOAD__) -msr_t libpayload_rdmsr(int addr) +#include <arch/msr.h> + +msr_t msr_read(int addr) { msr_t msr; unsigned long long val = _rdmsr(addr); @@ -314,41 +341,41 @@ msr_t libpayload_rdmsr(int addr) return msr; } -int libpayload_wrmsr(int addr, msr_t msr) +int msr_write(int addr, msr_t msr) { _wrmsr(addr, msr.lo | ((unsigned long long)msr.hi << 32)); return 0; } -int setup_cpu_msr(int cpu) +int msr_setup(int cpu) { return 0; } -void cleanup_cpu_msr(void) +void msr_cleanup(void) { } #else /* default MSR implementation */ -msr_t rdmsr(int addr) +msr_t msr_read(int addr) { msr_t ret = { 0xffffffff, 0xffffffff }; return ret; } -int wrmsr(int addr, msr_t msr) +int msr_write(int addr, msr_t msr) { return -1; } -int setup_cpu_msr(int cpu) +int msr_setup(int cpu) { msg_pinfo("No MSR support for your OS yet.\n"); return -1; } -void cleanup_cpu_msr(void) +void msr_cleanup(void) { // Nothing, yet. } |