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x86/tsc_msr: Use named struct initializers 

Use named struct initializers for the freq_desc struct-s initialization
and change the "u8 msr_plat" to a "bool use_msr_plat" to make its meaning
more clear instead of relying on a comment to explain it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200223140610.59612-1-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2020-02-23 15:06:08 +01:00 committed by Thomas Gleixner
parent 2c523b344d
commit 812c2d7506
1 changed files with 18 additions and 10 deletions
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28
arch/x86/kernel/tsc_msr.c
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@ -22,10 +22,10 @@
* read in MSR_PLATFORM_ID[12:8], otherwise in MSR_PERF_STAT[44:40]. * read in MSR_PLATFORM_ID[12:8], otherwise in MSR_PERF_STAT[44:40].
* Unfortunately some Intel Atom SoCs aren't quite compliant to this, * Unfortunately some Intel Atom SoCs aren't quite compliant to this,
* so we need manually differentiate SoC families. This is what the * so we need manually differentiate SoC families. This is what the
* field msr_plat does. * field use_msr_plat does.
*/ */
struct freq_desc { struct freq_desc {
u8 msr_plat; /* 1: use MSR_PLATFORM_INFO, 0: MSR_IA32_PERF_STATUS */ bool use_msr_plat;
u32 freqs[MAX_NUM_FREQS]; u32 freqs[MAX_NUM_FREQS];
}; };
@ -35,31 +35,39 @@ struct freq_desc {
* by MSR based on SDM. * by MSR based on SDM.
*/ */
static const struct freq_desc freq_desc_pnw = { static const struct freq_desc freq_desc_pnw = {
0, { 0, 0, 0, 0, 0, 99840, 0, 83200 } .use_msr_plat = false,
.freqs = { 0, 0, 0, 0, 0, 99840, 0, 83200 },
}; };
static const struct freq_desc freq_desc_clv = { static const struct freq_desc freq_desc_clv = {
0, { 0, 133200, 0, 0, 0, 99840, 0, 83200 } .use_msr_plat = false,
.freqs = { 0, 133200, 0, 0, 0, 99840, 0, 83200 },
}; };
static const struct freq_desc freq_desc_byt = { static const struct freq_desc freq_desc_byt = {
1, { 83300, 100000, 133300, 116700, 80000, 0, 0, 0 } .use_msr_plat = true,
.freqs = { 83300, 100000, 133300, 116700, 80000, 0, 0, 0 },
}; };
static const struct freq_desc freq_desc_cht = { static const struct freq_desc freq_desc_cht = {
1, { 83300, 100000, 133300, 116700, 80000, 93300, 90000, 88900, 87500 } .use_msr_plat = true,
.freqs = { 83300, 100000, 133300, 116700, 80000, 93300, 90000,
88900, 87500 },
}; };
static const struct freq_desc freq_desc_tng = { static const struct freq_desc freq_desc_tng = {
1, { 0, 100000, 133300, 0, 0, 0, 0, 0 } .use_msr_plat = true,
.freqs = { 0, 100000, 133300, 0, 0, 0, 0, 0 },
}; };
static const struct freq_desc freq_desc_ann = { static const struct freq_desc freq_desc_ann = {
1, { 83300, 100000, 133300, 100000, 0, 0, 0, 0 } .use_msr_plat = true,
.freqs = { 83300, 100000, 133300, 100000, 0, 0, 0, 0 },
}; };
static const struct freq_desc freq_desc_lgm = { static const struct freq_desc freq_desc_lgm = {
1, { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 } .use_msr_plat = true,
.freqs = { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 },
}; };
static const struct x86_cpu_id tsc_msr_cpu_ids[] = { static const struct x86_cpu_id tsc_msr_cpu_ids[] = {
@ -91,7 +99,7 @@ unsigned long cpu_khz_from_msr(void)
return 0; return 0;
freq_desc = (struct freq_desc *)id->driver_data; freq_desc = (struct freq_desc *)id->driver_data;
if (freq_desc->msr_plat) { if (freq_desc->use_msr_plat) {
rdmsr(MSR_PLATFORM_INFO, lo, hi); rdmsr(MSR_PLATFORM_INFO, lo, hi);
ratio = (lo >> 8) & 0xff; ratio = (lo >> 8) & 0xff;
} else { } else {