diff options
| author | Stanislav Kinsburskiy <stanislav.kinsburskiy@gmail.com> | 2022-11-04 20:40:55 +0000 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2022-11-28 16:48:20 +0000 |
| commit | 0408f16b43e578e70ad12a857159a0a771cfaa7c (patch) | |
| tree | a5406a8d6712543605042a0545615c3e1d6519a2 /arch/x86/hyperv/hv_init.c | |
| parent | 364adc45e9aff8cc08d7b87b6e61f6f272f70308 (diff) | |
clocksource: hyper-v: Add TSC page support for root partition
Microsoft Hypervisor root partition has to map the TSC page specified
by the hypervisor, instead of providing the page to the hypervisor like
it's done in the guest partitions.
However, it's too early to map the page when the clock is initialized, so, the
actual mapping is happening later.
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: 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: Daniel Lezcano <daniel.lezcano@linaro.org>
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/166759443644.385891.15921594265843430260.stgit@skinsburskii-cloud-desktop.internal.cloudapp.net
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'arch/x86/hyperv/hv_init.c')
| -rw-r--r-- | arch/x86/hyperv/hv_init.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index a269049a43ce..a823fde1ad7f 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -462,6 +462,8 @@ void __init hyperv_init(void) BUG_ON(!src); memcpy_to_page(pg, 0, src, HV_HYP_PAGE_SIZE); memunmap(src); + + hv_remap_tsc_clocksource(); } else { hypercall_msr.guest_physical_address = vmalloc_to_pfn(hv_hypercall_pg); wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); |