[RFC,V2,07/18] clocksource: hyper-v: decrypt hyperv tsc page in sev-snp enlightened guest
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From: Tianyu Lan <ltykernel@gmail.com>
To: luto@kernel.org, tglx@linutronix.de, mingo@redhat.com,
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Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
linux-hyperv@vger.kernel.org, linux-arch@vger.kernel.org
Subject: [RFC PATCH V2 07/18] clocksource: hyper-v: decrypt hyperv tsc page in
sev-snp enlightened guest
Date: Fri, 18 Nov 2022 22:46:21 -0500
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| Series |
x86/hyperv/sev: Add AMD sev-snp enlightened guest support on hyperv
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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
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
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 --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) {