[V3,6/9] 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,
hpa@zytor.com, daniel.lezcano@linaro.org, arnd@arndb.de,
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, Michael Kelley <mikelley@microsoft.com>
Subject: [PATCH V3 6/9] clocksource: hyper-v: Mark hyperv tsc page unencrypted
in sev-snp enlightened guest
Date: Mon, 17 Jul 2023 23:23:00 -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
July 18, 2023, 3:23 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. Reviewed-by: Michael Kelley <mikelley@microsoft.com> 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 e56307a81f4d..8ff7cd4e20bb 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -390,7 +390,7 @@ static __always_inline u64 read_hv_clock_msr(void) 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;