clocksource: hyper-v: Introduce a pointer to TSC page
Will be used later keep the address of the remapped page for the root partition as it will be Microsoft Hypervisor defined (and thus won't be a static address). Signed-off-by: Stanislav Kinsburskiy <stanislav.kinsburskiy@gmail.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: Thomas Gleixner <tglx@linutronix.de> CC: linux-hyperv@vger.kernel.org CC: linux-kernel@vger.kernel.org Reviewed-by: Michael Kelley <mikelley@microsoft.com> Reviewed-by: Anirudh Rayabharam <anrayabh@linux.microsoft.com> Link: https://lore.kernel.org/r/166749832893.218190.16503272948154953294.stgit@skinsburskii-cloud-desktop.internal.cloudapp.net Signed-off-by: Wei Liu <wei.liu@kernel.org>
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@ -367,9 +367,11 @@ static union {
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u8 reserved[PAGE_SIZE];
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u8 reserved[PAGE_SIZE];
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} tsc_pg __aligned(PAGE_SIZE);
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} tsc_pg __aligned(PAGE_SIZE);
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static struct ms_hyperv_tsc_page *tsc_page = &tsc_pg.page;
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struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
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struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
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{
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{
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return &tsc_pg.page;
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return tsc_page;
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}
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}
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EXPORT_SYMBOL_GPL(hv_get_tsc_page);
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EXPORT_SYMBOL_GPL(hv_get_tsc_page);
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@ -407,7 +409,7 @@ static void suspend_hv_clock_tsc(struct clocksource *arg)
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static void resume_hv_clock_tsc(struct clocksource *arg)
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static void resume_hv_clock_tsc(struct clocksource *arg)
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{
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{
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phys_addr_t phys_addr = virt_to_phys(&tsc_pg);
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phys_addr_t phys_addr = virt_to_phys(tsc_page);
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union hv_reference_tsc_msr tsc_msr;
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union hv_reference_tsc_msr tsc_msr;
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/* Re-enable the TSC page */
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/* Re-enable the TSC page */
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