From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiang W Date: Sun, 11 Apr 2021 18:07:25 +0800 Subject: [PATCH 6/7] lib: utils: Copy over restricted root domain memregions to FDT domains In-Reply-To: <20210410071808.759856-7-anup.patel@wdc.com> References: <20210410071808.759856-1-anup.patel@wdc.com> <20210410071808.759856-7-anup.patel@wdc.com> Message-ID: List-Id: To: opensbi@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit ? 2021-04-10?? 12:48 +0530?Anup Patel??? > We should copy over all restricted memregions from the root domain > to the domains populated from FDT. These restricted root memregions > are typically firmware memregion and M-mode only mmio memregions. > > Signed-off-by: Anup Patel looks good to me. Reviewed-by: Xiang W Regards, Xiang W > --- > lib/utils/fdt/fdt_domain.c | 26 ++++++++++++++++++++++---- > 1 file changed, 22 insertions(+), 4 deletions(-) > > diff --git a/lib/utils/fdt/fdt_domain.c b/lib/utils/fdt/fdt_domain.c > index 09615e5..95c195d 100644 > --- a/lib/utils/fdt/fdt_domain.c > +++ b/lib/utils/fdt/fdt_domain.c > @@ -222,7 +222,7 @@ static u32 fdt_domains_count; > static struct sbi_domain fdt_domains[FDT_DOMAIN_MAX_COUNT]; > static struct sbi_hartmask fdt_masks[FDT_DOMAIN_MAX_COUNT]; > static struct sbi_domain_memregion > - fdt_regions[FDT_DOMAIN_MAX_COUNT][FDT_DOMAIN_REGION_MAX_COUNT + > 2]; > + fdt_regions[FDT_DOMAIN_MAX_COUNT][FDT_DOMAIN_REGION_MAX_COUNT + > 1]; > > static int __fdt_parse_region(void *fdt, int domain_offset, > int region_offset, u32 region_access, > @@ -276,7 +276,7 @@ static int __fdt_parse_domain(void *fdt, int > domain_offset, void *opaque) > struct sbi_hartmask *mask; > struct sbi_hartmask assign_mask; > int *cold_domain_offset = opaque; > - struct sbi_domain_memregion *regions; > + struct sbi_domain_memregion *reg, *regions; > int i, err, len, cpus_offset, cpu_offset, doffset; > > /* Sanity check on maximum domains we can handle */ > @@ -314,13 +314,31 @@ static int __fdt_parse_domain(void *fdt, int > domain_offset, void *opaque) > /* Setup memregions from DT */ > val32 = 0; > sbi_memset(regions, 0, > - sizeof(*regions) * (FDT_DOMAIN_REGION_MAX_COUNT + > 2)); > + sizeof(*regions) * (FDT_DOMAIN_REGION_MAX_COUNT + > 1)); > dom->regions = regions; > err = fdt_iterate_each_memregion(fdt, domain_offset, &val32, > __fdt_parse_region); > if (err) > return err; > - sbi_domain_memregion_initfw(®ions[val32]); > + > + /* > + * Copy over root domain memregions which don't allow > + * read, write and execute from lower privilege modes. > + * > + * These root domain memregions without read, write, > + * and execute permissions include: > + * 1) firmware region protecting the firmware memory > + * 2) mmio regions protecting M-mode only mmio devices > + */ > + sbi_domain_for_each_memregion(&root, reg) { > + if ((reg->flags & SBI_DOMAIN_MEMREGION_READABLE) || > + (reg->flags & SBI_DOMAIN_MEMREGION_WRITEABLE) || > + (reg->flags & SBI_DOMAIN_MEMREGION_EXECUTABLE)) > + continue; > + if (FDT_DOMAIN_REGION_MAX_COUNT <= val32) > + return SBI_EINVAL; > + sbi_memcpy(®ions[val32++], reg, sizeof(*reg)); > + } > > /* Read "boot-hart" DT property */ > val32 = -1U; > -- > 2.25.1 > >