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| author | Mike Travis <mike.travis@hpe.com> | 2022-04-06 22:51:47 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-07 18:23:20 +0300 |
| commit | d812f7c475c6a4dcfff02a85fbfd7a9c87e6a094 (patch) | |
| tree | 25e64030a1b6150c3d4ebc613a6900e79455c2b5 /arch/x86/platform | |
| parent | 3123109284176b1532874591f7c81f3837bbdc17 (diff) | |
| download | linux-d812f7c475c6a4dcfff02a85fbfd7a9c87e6a094.tar.xz | |
x86/platform/uv: Update NMI Handler for UV5
Update NMI handler for UV5 hardware. A platform register changed, and
UV5 only uses one of the two NMI methods used on previous hardware.
Signed-off-by: Mike Travis <mike.travis@hpe.com>
Signed-off-by: Steve Wahl <steve.wahl@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Dimitri Sivanich <dimitri.sivanich@hpe.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220406195149.228164-2-steve.wahl@hpe.com
Diffstat (limited to 'arch/x86/platform')
| -rw-r--r-- | arch/x86/platform/uv/uv_nmi.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c index 1e9ff28bc2e0..61ec3be77328 100644 --- a/arch/x86/platform/uv/uv_nmi.c +++ b/arch/x86/platform/uv/uv_nmi.c @@ -244,8 +244,10 @@ static inline bool uv_nmi_action_is(const char *action) /* Setup which NMI support is present in system */ static void uv_nmi_setup_mmrs(void) { + bool new_nmi_method_only = false; + /* First determine arch specific MMRs to handshake with BIOS */ - if (UVH_EVENT_OCCURRED0_EXTIO_INT0_MASK) { + if (UVH_EVENT_OCCURRED0_EXTIO_INT0_MASK) { /* UV2,3,4 setup */ uvh_nmi_mmrx = UVH_EVENT_OCCURRED0; uvh_nmi_mmrx_clear = UVH_EVENT_OCCURRED0_ALIAS; uvh_nmi_mmrx_shift = UVH_EVENT_OCCURRED0_EXTIO_INT0_SHFT; @@ -255,26 +257,25 @@ static void uv_nmi_setup_mmrs(void) uvh_nmi_mmrx_req = UVH_BIOS_KERNEL_MMR_ALIAS_2; uvh_nmi_mmrx_req_shift = 62; - } else if (UVH_EVENT_OCCURRED1_EXTIO_INT0_MASK) { + } else if (UVH_EVENT_OCCURRED1_EXTIO_INT0_MASK) { /* UV5+ setup */ uvh_nmi_mmrx = UVH_EVENT_OCCURRED1; uvh_nmi_mmrx_clear = UVH_EVENT_OCCURRED1_ALIAS; uvh_nmi_mmrx_shift = UVH_EVENT_OCCURRED1_EXTIO_INT0_SHFT; uvh_nmi_mmrx_type = "OCRD1-EXTIO_INT0"; - uvh_nmi_mmrx_supported = UVH_EXTIO_INT0_BROADCAST; - uvh_nmi_mmrx_req = UVH_BIOS_KERNEL_MMR_ALIAS_2; - uvh_nmi_mmrx_req_shift = 62; + new_nmi_method_only = true; /* Newer nmi always valid on UV5+ */ + uvh_nmi_mmrx_req = 0; /* no request bit to clear */ } else { - pr_err("UV:%s:cannot find EVENT_OCCURRED*_EXTIO_INT0\n", - __func__); + pr_err("UV:%s:NMI support not available on this system\n", __func__); return; } /* Then find out if new NMI is supported */ - if (likely(uv_read_local_mmr(uvh_nmi_mmrx_supported))) { - uv_write_local_mmr(uvh_nmi_mmrx_req, - 1UL << uvh_nmi_mmrx_req_shift); + if (new_nmi_method_only || uv_read_local_mmr(uvh_nmi_mmrx_supported)) { + if (uvh_nmi_mmrx_req) + uv_write_local_mmr(uvh_nmi_mmrx_req, + 1UL << uvh_nmi_mmrx_req_shift); nmi_mmr = uvh_nmi_mmrx; nmi_mmr_clear = uvh_nmi_mmrx_clear; nmi_mmr_pending = 1UL << uvh_nmi_mmrx_shift; |