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| author | Stanislav Kinsburskiy <stanislav.kinsburskiy@gmail.com> | 2022-11-03 18:58:59 +0100 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2022-11-28 17:48:20 +0100 |
| commit | 364adc45e9aff8cc08d7b87b6e61f6f272f70308 (patch) | |
| tree | 987bc861feeaf52e9a993626ca338f8ec2f90647 /drivers/clocksource | |
| parent | clocksource: hyper-v: Introduce TSC PFN getter (diff) | |
| download | linux-364adc45e9aff8cc08d7b87b6e61f6f272f70308.tar.xz linux-364adc45e9aff8cc08d7b87b6e61f6f272f70308.zip | |
clocksource: hyper-v: Use TSC PFN getter to map vvar page
Instead of converting the virtual address to physical directly.
This is a precursor patch for the upcoming support for TSC page mapping into
Microsoft Hypervisor root partition, where TSC PFN will be defined by the
hypervisor and thus can't be obtained by linear translation of the physical
address.
Signed-off-by: Stanislav Kinsburskiy <stanislav.kinsburskiy@gmail.com>
CC: Andy Lutomirski <luto@kernel.org>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Ingo Molnar <mingo@redhat.com>
CC: Borislav Petkov <bp@alien8.de>
CC: Dave Hansen <dave.hansen@linux.intel.com>
CC: x86@kernel.org
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Wei Liu <wei.liu@kernel.org>
CC: Dexuan Cui <decui@microsoft.com>
CC: Daniel Lezcano <daniel.lezcano@linaro.org>
CC: linux-kernel@vger.kernel.org
CC: linux-hyperv@vger.kernel.org
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Anirudh Rayabharam <anrayabh@linux.microsoft.com>
Link: https://lore.kernel.org/r/166749833939.218190.14095015146003109462.stgit@skinsburskii-cloud-desktop.internal.cloudapp.net
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/hyperv_timer.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c index b7af19d06b51..9445a1558fe9 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -370,10 +370,11 @@ static union { static struct ms_hyperv_tsc_page *tsc_page = &tsc_pg.page; static unsigned long tsc_pfn; -static unsigned long hv_get_tsc_pfn(void) +unsigned long hv_get_tsc_pfn(void) { return tsc_pfn; } +EXPORT_SYMBOL_GPL(hv_get_tsc_pfn); struct ms_hyperv_tsc_page *hv_get_tsc_page(void) { |