diff mbox series

[RFC,V2,07/18] clocksource: hyper-v: decrypt hyperv tsc page in sev-snp enlightened guest

Message ID 20221119034633.1728632-8-ltykernel@gmail.com (mailing list archive)
State New, archived
Headers show
Series x86/hyperv/sev: Add AMD sev-snp enlightened guest support on hyperv | expand

Commit Message

Tianyu Lan Nov. 19, 2022, 3:46 a.m. UTC 
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>
---
 drivers/clocksource/hyperv_timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Michael Kelley (LINUX) Dec. 13, 2022, 5:30 p.m. UTC | #1 
From: Tianyu Lan <ltykernel@gmail.com> Sent: Friday, November 18, 2022 7:46 PM
>

Previous patches to the Hyper-V clocksource driver have not been very
consistent in the Subject line prefix, but let's use
"clocksource/drivers/hyper-v:" since it has been used the most.

> 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>
> ---
>  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 bb47610bbd1c..aa68eebed5ee 100644
> --- a/drivers/clocksource/hyperv_timer.c
> +++ b/drivers/clocksource/hyperv_timer.c
> @@ -364,7 +364,7 @@ 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);
> 
>  struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
>  {
> --
> 2.25.1
Tianyu Lan Dec. 14, 2022, 4:05 p.m. UTC | #2 
On 12/14/2022 1:30 AM, Michael Kelley (LINUX) wrote:
> From: Tianyu Lan<ltykernel@gmail.com>  Sent: Friday, November 18, 2022 7:46 PM
> Previous patches to the Hyper-V clocksource driver have not been very
> consistent in the Subject line prefix, but let's use
> "clocksource/drivers/hyper-v:" since it has been used the most.
> 

OK. Will update in the next version.

Thanks.
diff mbox series

Patch

diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
index bb47610bbd1c..aa68eebed5ee 100644
--- a/drivers/clocksource/hyperv_timer.c
+++ b/drivers/clocksource/hyperv_timer.c
@@ -364,7 +364,7 @@  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);
 
 struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
 {