[PATCH 1/2] x86/sev: Use KHZ_PER_MHZ in snp_secure_tsc_init()

[Thorsten Blum <thorsten.blum@linux.dev>]

Replace the hard-coded conversion factor with KHZ_PER_MHZ to convert
tsc_freq_mhz from MHz to kHz.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
---
 arch/x86/coco/sev/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
index ecd77d3217f3..b7be9a8ab484 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -15,6 +15,7 @@
 #include <linux/printk.h>
 #include <linux/mm_types.h>
 #include <linux/set_memory.h>
+#include <linux/units.h>
 #include <linux/memblock.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
@@ -2042,7 +2043,8 @@ void __init snp_secure_tsc_init(void)
 	/* Extract the GUEST TSC MHZ from BIT[17:0], rest is reserved space */
 	tsc_freq_mhz &= GENMASK_ULL(17, 0);
 
-	snp_tsc_freq_khz = SNP_SCALE_TSC_FREQ(tsc_freq_mhz * 1000, secrets->tsc_factor);
+	snp_tsc_freq_khz = SNP_SCALE_TSC_FREQ(tsc_freq_mhz * KHZ_PER_MHZ,
+					      secrets->tsc_factor);
 
 	x86_platform.calibrate_cpu = securetsc_get_tsc_khz;
 	x86_platform.calibrate_tsc = securetsc_get_tsc_khz;