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Differential D2873 Diff 6339 usr.sbin/bhyvectl/bhyvectl.c

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usr.sbin/bhyvectl/bhyvectl.c

Show First 20 Lines • Show All 455 Lines • ▼ Show 20 Lines for (msr = 0; msr < 0x2000; msr++) {
print_msr_pm(msr + MSR_AMD6TH_START, vcpu, readable, print_msr_pm(msr + MSR_AMD6TH_START, vcpu, readable,
writeable); writeable);
} }
} }
static int static int
dump_msr_bitmap(int vcpu, uint64_t addr, bool cpu_intel) dump_msr_bitmap(int vcpu, uint64_t addr, bool cpu_intel)
{ {
int error, fd, map_size; int error, fd, map_size;
neelUnsubmitted
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clang is confused but if you want to fix this then is to move the initialization of 'map_size' before the first 'goto done'.

neel: clang is confused but if you want to fix this then is to move the initialization of 'map_size'…
const char *bitmap; const char *bitmap;
error = -1; error = -1;
bitmap = MAP_FAILED; bitmap = MAP_FAILED;
fd = open("/dev/mem", O_RDONLY, 0); fd = open("/dev/mem", O_RDONLY, 0);
if (fd < 0) { if (fd < 0) {
perror("Couldn't open /dev/mem"); perror("Couldn't open /dev/mem");
Show All 12 Linesdump_msr_bitmap(int vcpu, uint64_t addr, bool cpu_intel)
} }
if (cpu_intel) if (cpu_intel)
dump_intel_msr_pm(bitmap, vcpu); dump_intel_msr_pm(bitmap, vcpu);
else else
dump_amd_msr_pm(bitmap, vcpu); dump_amd_msr_pm(bitmap, vcpu);
error = 0; error = 0;
done: done:
neelUnsubmitted
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This is introducing a bug in the common case where 'map_size' is getting reset to 0. Yes, this is not worth committing :-)

What I meant was to do this instead:

error = -1;
bitmap = MAP_FAILED;
if (cpu_intel)
        map_size = PAGE_SIZE;
else
        map_size = 2 * PAGE_SIZE;

fd = open("/dev/mem", O_RDONLY, 0);
if (fd < 0) {
        perror("Couldn't open /dev/mem");
        goto done;
}
neel: This is introducing a bug in the common case where 'map_size' is getting reset to 0. Yes, this…
if (bitmap != MAP_FAILED) if (bitmap != MAP_FAILED)
munmap((void *)bitmap, map_size); munmap((void *)bitmap, map_size);
if (fd >= 0) if (fd >= 0)
close(fd); close(fd);
return (error); return (error);
} }
▲ Show 20 Lines • Show All 1,050 Lines • ▼ Show 20 Lines while (1) {
printf("%-12s", numbuf); printf("%-12s", numbuf);
printf("%-12s", name[0] ? name : "sysmem"); printf("%-12s", name[0] ? name : "sysmem");
printf("%-12lX", segoff); printf("%-12lX", segoff);
printf("%c%c%c ", prot & PROT_READ ? 'R' : '-', printf("%c%c%c ", prot & PROT_READ ? 'R' : '-',
prot & PROT_WRITE ? 'W' : '-', prot & PROT_WRITE ? 'W' : '-',
prot & PROT_EXEC ? 'X' : '-'); prot & PROT_EXEC ? 'X' : '-');
delim = '\0'; delim = '\0';
neelUnsubmitted
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This is wrong.

'delim' should be '\0' until the first field is pretty-printed. After that is should be set to the real delimited '/'.

neel: This is wrong. 'delim' should be '\0' until the first field is pretty-printed. After that is…
if (flags & VM_MEMMAP_F_WIRED) { if (flags & VM_MEMMAP_F_WIRED) {
printf("%cwired", delim);
delim = '/'; delim = '/';
printf("%cwired", delim);
} }
if (flags & VM_MEMMAP_F_IOMMU) { if (flags & VM_MEMMAP_F_IOMMU) {
printf("%ciommu", delim);
delim = '/'; delim = '/';
printf("%ciommu", delim);
} }
printf("\n"); printf("\n");
gpa += maplen; gpa+= maplen;
neelUnsubmitted
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Huh? There *should* be a space before and after the '+=' operator.

neel: Huh? There *should* be a space before and after the '+=' operator.
} }
} }
static int static int
show_memseg(struct vmctx *ctx) show_memseg(struct vmctx *ctx)
{ {
char name[SPECNAMELEN + 1], numbuf[8]; char name[SPECNAMELEN + 1], numbuf[8];
size_t seglen; size_t seglen;
▲ Show 20 Lines • Show All 641 Lines • Show Last 20 Lines