[RFC,V4,05/17] clocksource/drivers/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,
bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
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Cc: pangupta@amd.com, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-arch@vger.kernel.org
Subject: [RFC PATCH V4 05/17] clocksource/drivers/hyper-v: decrypt hyperv tsc
page in sev-snp enlightened guest
Date: Mon, 3 Apr 2023 13:43:53 -0400
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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
April 3, 2023, 5:43 p.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> --- 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 c0cef92b12b8..44da16ca203c 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -365,7 +365,7 @@ 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;