[V2,6/9] clocksource: hyper-v: Mark hyperv tsc page unencrypted in sev-snp enlightened guest
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From: Tianyu Lan <ltykernel@gmail.com>
To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org,
decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
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michael.h.kelley@microsoft.com
Cc: Tianyu Lan <tiala@microsoft.com>, linux-arch@vger.kernel.org,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
vkuznets@redhat.com
Subject: [PATCH V2 6/9] clocksource: hyper-v: Mark hyperv tsc page unencrypted
in sev-snp enlightened guest
Date: Mon, 26 Jun 2023 23:22:44 -0400
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| Series |
x86/hyperv: Add AMD sev-snp enlightened guest support on hyperv
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Commit Message
Tianyu Lan
June 27, 2023, 3:22 a.m. UTC
From: Tianyu Lan <tiala@microsoft.com> Hyper-V tsc page is shared with hypervisor and mark the page unencrypted 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: Monday, June 26, 2023 8:23 PM > > Hyper-V tsc page is shared with hypervisor and mark the page > unencrypted 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 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 Reviewed-by: Michael Kelley <mikelley@microsoft.com>
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;