[RFC PATCH V5 05/15] clocksource/drivers/hyper-v: decrypt hyperv tsc page in sev-snp enlightened guest

Tianyu Lan
2023-05-01T08:57:55Z

From: Tianyu Lan <tiala@microsoft.com>

Hyper-V tsc page is shared with hypervisor and it should
be decrypted in sev-snp enlightened guest when it's used.

Signed-off-by: Tianyu Lan <tiala@microsoft.com>
---
Change since RFC V2:
* Change the Subject line prefix
---
drivers/clocksource/hyperv_timer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
index bcd9042a0c9f..66e29a19770b 100644
--- a/drivers/clocksource/hyperv_timer.c
+++ b/drivers/clocksource/hyperv_timer.c
@@ -376,7 +376,7 @@ EXPORT_SYMBOL_GPL(hv_stimer_global_cleanup);
static union {
struct ms_hyperv_tsc_page page;
u8 reserved[PAGE_SIZE];
-} tsc_pg __aligned(PAGE_SIZE);
+} tsc_pg __bss_decrypted __aligned(PAGE_SIZE);

static struct ms_hyperv_tsc_page *tsc_page = &tsc_pg.page;
static unsigned long tsc_pfn;
--
2.25.1