diff options
author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2016-12-22 14:16:54 +1100 |
---|---|---|
committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-01-05 15:41:02 +1100 |
commit | 21be2a908c5c9cb39b797f13b17616744438f733 (patch) | |
tree | 2cec0a1bfbc53777c5b6d864f9d9a55cb56ff38a | |
parent | d3c57a1d8acbfa7848e7be84dc35171613117383 (diff) | |
download | skiboot-21be2a908c5c9cb39b797f13b17616744438f733.zip skiboot-21be2a908c5c9cb39b797f13b17616744438f733.tar.gz skiboot-21be2a908c5c9cb39b797f13b17616744438f733.tar.bz2 |
xive: Add opal_xive_get/set_vp_info
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
-rw-r--r-- | hw/xive.c | 97 |
1 files changed, 97 insertions, 0 deletions
@@ -1221,6 +1221,12 @@ static int64_t xive_ivc_scrub(struct xive *x, uint64_t block, uint64_t idx) return __xive_cache_scrub(x, xive_cache_ivc, block, idx, false, false); } +static int64_t xive_vpc_scrub_clean(struct xive *x, uint64_t block, uint64_t idx) +{ + /* IVC has no "want_inval" bit, it always invalidates */ + return __xive_cache_scrub(x, xive_cache_vpc, block, idx, true, false); +} + static int64_t __xive_cache_watch(struct xive *x, enum xive_cache_type ctype, uint64_t block, uint64_t idx, uint32_t start_dword, uint32_t dword_count, @@ -3389,6 +3395,95 @@ static int64_t opal_xive_donate_page(uint32_t chip_id, uint64_t addr) return OPAL_SUCCESS; } +static int64_t opal_xive_get_vp_info(uint64_t vp_id, + uint64_t *out_flags, + uint64_t *out_cam_value, + uint64_t *out_report_cl_pair) +{ + struct xive *x; + struct xive_vp *vp; + uint32_t blk, idx; + bool group; + + if (!xive_decode_vp(vp_id, &blk, &idx, NULL, &group)) + return OPAL_PARAMETER; + /* We don't do groups yet */ + if (group) + return OPAL_PARAMETER; + x = xive_from_pc_blk(blk); + if (!x) + return OPAL_PARAMETER; + vp = xive_get_vp(x, idx); + if (!vp) + return OPAL_PARAMETER; + + if (out_flags) { + *out_flags = 0; + if (vp->w0 & VP_W0_VALID) + *out_flags |= OPAL_XIVE_VP_ENABLED; + } + + if (out_cam_value) + *out_cam_value = (blk << 19) | idx; + + if (out_report_cl_pair) { + *out_report_cl_pair = ((uint64_t)(vp->w6 & 0x0fffffff)) << 32; + *out_report_cl_pair |= vp->w7 & 0xffffff00; + } + return OPAL_SUCCESS; +} + +static int64_t opal_xive_set_vp_info(uint64_t vp_id, + uint64_t flags, + uint64_t report_cl_pair) +{ + struct xive *x; + struct xive_vp *vp, vp_new; + uint32_t blk, idx; + bool group; + int64_t rc; + + if (!xive_decode_vp(vp_id, &blk, &idx, NULL, &group)) + return OPAL_PARAMETER; + /* We don't do groups yet */ + if (group) + return OPAL_PARAMETER; + if (report_cl_pair & 0xff) + return OPAL_PARAMETER; + x = xive_from_pc_blk(blk); + if (!x) + return OPAL_PARAMETER; + vp = xive_get_vp(x, idx); + if (!vp) + return OPAL_PARAMETER; + + vp_new = *vp; + if (flags & OPAL_XIVE_VP_ENABLED) + vp_new.w0 |= VP_W0_VALID; + else + vp_new.w0 &= ~VP_W0_VALID; + + vp_new.w7 = report_cl_pair & 0xffffffff; + vp_new.w6 = report_cl_pair >> 32; + + lock(&x->lock); + rc = xive_vpc_cache_update(x, blk, idx, 0, 8, &vp_new, false, false); + if (rc) { + unlock(&x->lock); + return rc; + } + + /* When disabling, we scrub clean (invalidate the entry) so + * we can avoid cache ops in alloc/free + */ + if (!(flags & OPAL_XIVE_VP_ENABLED)) + xive_vpc_scrub_clean(x, blk, idx); + + unlock(&x->lock); + + return OPAL_SUCCESS; +} + static void xive_cleanup_cpu_cam(struct cpu_thread *c) { struct xive_cpu_state *xs = c->xstate; @@ -3843,5 +3938,7 @@ void init_xive(void) opal_register(OPAL_XIVE_FREE_IRQ, opal_xive_free_irq, 1); opal_register(OPAL_XIVE_ALLOCATE_VP_BLOCK, opal_xive_alloc_vp_block, 1); opal_register(OPAL_XIVE_FREE_VP_BLOCK, opal_xive_free_vp_block, 1); + opal_register(OPAL_XIVE_GET_VP_INFO, opal_xive_get_vp_info, 4); + opal_register(OPAL_XIVE_SET_VP_INFO, opal_xive_set_vp_info, 3); } |